U.S. patent application number 15/885332 was filed with the patent office on 2018-06-07 for method and apparatus for measuring communication quality.
The applicant listed for this patent is Huawei Technologies Co., Ltd.. Invention is credited to Jianghua Liu, Jianguo Wang, Yongxing Zhou.
Application Number | 20180159673 15/885332 |
Document ID | / |
Family ID | 52103807 |
Filed Date | 2018-06-07 |
United States Patent
Application |
20180159673 |
Kind Code |
A1 |
Wang; Jianguo ; et
al. |
June 7, 2018 |
METHOD AND APPARATUS FOR MEASURING COMMUNICATION QUALITY
Abstract
A method and an apparatus for measuring communication quality
are disclosed. The method includes: acquiring reference signal
resource configuration information, where the reference signal
resource configuration information at least includes: reference
signal port configuration information, and reference signal power
information of at least one port group; or the reference signal
resource configuration information at least includes: reference
signal port configuration information, and a ratio of a power of a
data channel in at least one port group to a power of a reference
signal; and sending the acquired reference signal resource
configuration information to user equipment. Therefore, in a
multi-antenna system, accurate signal quality measurement
information is acquired, or more accurate channel state information
is acquired.
Inventors: |
Wang; Jianguo; (Bonn,
DE) ; Liu; Jianghua; (Beijing, CN) ; Zhou;
Yongxing; (Beijing, CN) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Huawei Technologies Co., Ltd. |
Shenzhen |
|
CN |
|
|
Family ID: |
52103807 |
Appl. No.: |
15/885332 |
Filed: |
January 31, 2018 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
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14973975 |
Dec 18, 2015 |
9923687 |
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15885332 |
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PCT/CN2013/077477 |
Jun 19, 2013 |
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14973975 |
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Current U.S.
Class: |
1/1 |
Current CPC
Class: |
H04B 17/309 20150115;
H04L 5/0023 20130101; H04L 5/0048 20130101; H04L 1/0026
20130101 |
International
Class: |
H04L 5/00 20060101
H04L005/00; H04L 1/00 20060101 H04L001/00; H04B 17/309 20150101
H04B017/309 |
Claims
1. A method for measuring communication quality, the method
comprising: determining reference signal resource configuration
information comprising reference signal port configuration
information, wherein the reference signal port configuration
information is used for indicating a mapping relationship between a
reference signal port and a port group; and sending the reference
signal resource configuration information to user equipment, so
that the user equipment acquires signal quality measurement
information according to the reference signal port configuration
information, wherein the signal quality measurement information is
a reference signal received power (RSRP).
2. The method according to claim 1, wherein: the signal quality
measurement information is acquired according to a reference signal
port information in a specified port group; the reference signal
port information in one specified port group is acquired according
to the reference signal port configuration information.
3. The method according to claim 1, wherein the method further
comprises: receiving the signal quality measurement information
sent by the user equipment.
4. A method for measuring communication quality, the method
comprising: receiving reference signal resource configuration
information sent by a base station, wherein the reference signal
resource configuration information comprises reference signal port
configuration information, wherein the reference signal port
configuration information is used for indicating a mapping
relationship between a reference signal port and a port group;
obtaining reference signal port information in one port group
according to the reference signal port configuration information;
and acquiring signal quality measurement information according to
the reference signal port information in the one port group,
wherein the signal quality measurement information is a reference
signal received power (RSRP).
5. The method according to claim 4, wherein: obtaining reference
signal port information in one port group according to the
reference signal port configuration information comprises:
obtaining reference signal port information in one specified port
group according to the reference signal port configuration
information; and acquiring signal quality measurement information
according to the reference signal port information in the one port
group comprises: acquiring the signal quality measurement
information according to the reference signal port information in
the one specified port group.
6. The method according to claim 4, further comprising: sending the
signal quality measurement information to the base station.
7. A network side apparatus, comprises a processor and a
transmitter, wherein the processor, is configured to determine
reference signal resource configuration information comprising
reference signal port configuration information, wherein the
reference signal port configuration information is used for
indicating a mapping relationship between a reference signal port
and a port group; the transmitter, is configured to send the
reference signal resource configuration information to user
equipment, the reference signal port configuration information is
used for the user equipment acquiring signal quality measurement
information according to the reference signal port configuration
information, wherein the signal quality measurement information is
a reference signal received power (RSRP).
8. The network side apparatus according to claim 7, wherein: the
signal quality measurement information is acquired according to a
reference signal port information in a specified port group; the
reference signal port information in one specified port group is
acquired according to the reference signal port configuration
information.
9. The network side apparatus according to claim 7, wherein the
network side apparatus further comprises a receiver, the receiver
is configured to receive the signal quality measurement information
sent by the user equipment.
10. A user equipment, comprises a processor and a receiver, wherein
the receiver, is configured to receive reference signal resource
configuration information sent by a base station, wherein the
reference signal resource configuration information comprises
reference signal port configuration information, wherein the
reference signal port configuration information is used for
indicating a mapping relationship between a reference signal port
and a port group; the processor, is configured to obtain reference
signal port information in one port group according to the
reference signal port configuration information; the processor, is
further configured to acquire signal quality measurement
information according to the reference signal port information in
the one port group, wherein the signal quality measurement
information is a reference signal received power (RSRP).
11. The user equipment according to claim 10, wherein: the
processor, is configured to obtain reference signal port
information in one port group according to the reference signal
port configuration information comprises: the processor, is
configured to obtain reference signal port information in one
specified port group according to the reference signal port
configuration information; and the processor, is further configured
to acquire signal quality measurement information according to the
reference signal port information in the one port group comprises:
the processor, is further configured to acquire the signal quality
measurement information according to the reference signal port
information in the one specified port group.
12. The method according to claim 10, wherein the user equipment
further comprises a transmitter, the transmitter, is configured to
send the signal quality measurement information to the base
station.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This application is a continuation of U.S. patent
application Ser. No. 14/973,975, filed on Dec. 18, 2015, which is a
continuation of International Application No. PCT/CN2013/077477,
filed on Jun. 19, 2013, all of which are hereby incorporated by
reference in their entireties.
TECHNICAL FIELD
[0002] The present application relates to the field of
communications technologies, and in particular, to a method and an
apparatus for measuring communication quality.
BACKGROUND
[0003] In the field of communications technologies, signals may
usually be classified into two types: one type of signal carries
information from a higher layer; the other type of signal does not
carry information from a higher layer, and this type of signal is
usually used for assisting in or indicating reception of the former
type of signal. A transmit power of a signal is a very important
parameter for both types of signals above. For example, a power of
a reference signal may be used for deriving a path loss estimation
value, and the path loss estimation value may be used as a part of
open-loop control to implement uplink power control, or may be used
as a basis for selecting a cell (or a transmit node, or a receive
node). A power ratio of a physical downlink shared channel (PDSCH)
signal to a reference signal (for example, a cell-specific
reference signal (CRS) or a channel state information reference
signal (CSI-RS)) may be used for deriving channel state information
(CSI), thereby facilitating implementation of scheduling and link
adaptation.
[0004] In existing Long Term Evolution (LTE) Releases R8-R11, a
power-related parameter is determined on a base station side or a
network side, and is notified to user equipment (UE) by using
higher layer signaling. Because a conventional base station antenna
configuration has a fixed downtilt, and an uplink and a downlink
undergo similar path losses, so that a downlink path loss can be
desirably used for estimating an uplink path loss. Therefore,
distinguishing of antenna ports can be omitted in the power-related
parameter sent by the base station side or the network side, and
especially in a case of multiple antenna ports. If antenna ports
are not distinguished, a downlink path loss can be desirably used
for estimating an uplink path loss. The technology is desirably
applicable to the conventional base station antenna configuration,
especially if transmit powers of antenna ports are the same. In
another aspect, a reference signal received power (RSRP), of a
current cell/node or an adjacent cell/node, reported by user
equipment (UE) may be used by a base station or an evolved node B
(eNB) to select a serving cell or node for the UE. In the prior
art, the RSRP is an estimation obtained by performing averaging on
different antenna ports.
[0005] To lower a system cost and at the same time reach a higher
system capacity and coverage requirement, active antenna systems
(AAS) have been widely deployed in practice. At present, the LTE
R12 standard that is about to be launched is considering
enhancement of communication performance after introduction of an
AAS system. Different from a conventional base station antenna, an
AAS further provides design flexibility in a vertical direction of
an antenna, where independent downtilts may be used in an uplink
and a downlink, and powers of different antenna ports may be
different. In addition, for AAS base stations, even if the AAS base
stations have a same quantity of antenna ports, antenna array
structures of the AAS base stations may also be different.
Therefore, antenna ports having a same sequence number may also
have different transmit powers in different array structures. In
such a case, in the prior art, power control is implemented based
on a downlink reference signal received power, or a method for
selecting a cell/node is no longer effective. In the prior art,
correct distinguishing cannot be performed if transmit powers of
antenna ports are different, and a technical solution that
accurately and effectively estimates an uplink path loss and
estimates channel state information cannot be provided.
SUMMARY
[0006] Embodiments of the present disclosure provide a method and
an apparatus for measuring communication quality, thereby
overcoming a problem in the prior art that accurate signal quality
measurement information cannot be acquired or more accurate channel
state information cannot be acquired in a multi-antenna system.
[0007] A first aspect provides a method for measuring communication
quality, including:
[0008] determining reference signal resource configuration
information, where the reference signal resource configuration
information includes reference signal port configuration
information, where the reference signal port configuration
information is used for indicating a mapping relationship between a
reference signal port and a port group; and
[0009] sending the reference signal resource configuration
information to user equipment, so that the user equipment acquires
signal quality measurement information according to the reference
signal port configuration information.
[0010] In a first possible implementation manner, according to the
first aspect, the reference signal resource configuration
information further includes: reference signal power information of
at least two port groups that is used by the user equipment to
acquire the signal quality measurement information according to the
reference signal port configuration information and in combination
with the reference signal power information of the at least two
port groups, and
[0011] the reference signal power information of the at least two
port groups includes:
[0012] a reference signal power of a first port group, and a ratio
of a reference signal power of each port group among the rest port
groups to the reference signal power of the first port group;
or
[0013] a reference signal power of a first port group, and a
differential between a reference signal power of each port group
among the rest port groups and the reference signal power of the
first port group.
[0014] In a second possible implementation manner, with reference
to the first aspect or the first possible implementation manner,
the signal quality measurement information is a reference signal
received power RSRP, and the method further includes:
[0015] sending, to the user equipment, filter coefficient
information that is used by the user equipment to perform, based on
the filter coefficient information, filtering on the reference
signal received power RSRP and obtain a path loss estimation
value.
[0016] In a third possible implementation manner, with reference to
the second possible implementation manner, the method further
includes:
[0017] receiving an uplink physical channel or an uplink physical
signal sent by the user equipment, where a transmit power of the
uplink physical channel or the uplink physical signal is obtained
by means of calculation by the user equipment according to the path
loss estimation value.
[0018] In a fourth possible implementation manner, with reference
to the first aspect or the first possible implementation manner,
the signal quality measurement information includes:
[0019] any one or any combination of a reference signal received
power RSRP, a reference signal received quality RSRQ, and a
reference signal strength indicator RSSI.
[0020] In a fifth possible implementation manner, with reference to
the first aspect or any one of the first possible implementation
manner to the fourth possible implementation manner, the method
further includes:
[0021] receiving the signal quality measurement information sent by
the user equipment.
[0022] A second aspect provides a method for measuring
communication quality, including:
[0023] receiving reference signal resource configuration
information sent by a base station, where the reference signal
resource configuration information includes reference signal port
configuration information, where the reference signal port
configuration information is used for indicating a mapping
relationship between a reference signal port and a port group;
[0024] obtaining reference signal port information in at least one
port group according to the reference signal port configuration
information; and
[0025] acquiring signal quality measurement information according
to the reference signal port information in the at least one port
group.
[0026] In a first possible implementation manner, according to the
second aspect, the obtaining reference signal port information in
at least one port group according to the reference signal port
configuration information includes:
[0027] obtaining reference signal port information in one specified
port group according to the reference signal port configuration
information; and
[0028] the acquiring signal quality measurement information
according to the reference signal port information in the at least
one port group includes:
[0029] acquiring the signal quality measurement information
according to the reference signal port information in the one
specified port group.
[0030] In a second possible implementation manner, according to the
first possible implementation manner of the second aspect, when the
signal quality measurement information is a reference signal
received power RSRP, the acquiring the signal quality measurement
information according to the reference signal port information in
the one specified port group includes: [0031] obtaining a reference
signal received power RSRP(r,p) of a pth port of an rth receive
antenna according to a formula
[0031] R S R P ( r , p ) = 1 K s - 1 m = 0 K s - 1 h ^ p ( m ) h ^
p ( m + 1 ) ##EQU00001##
and obtaining the RSRP by combining RSRP(r,p) where h.sub.p(m) is a
channel estimation on a reference signal RE whose label number is
m, K.sub.s is a total sample quantity of usable reference signal
REs in measurement bandwidth, p is a number of a reference signal
port in the one specified port group, and r is an index of a
receive antenna.
[0032] In a third possible implementation manner, with reference to
the second aspect, the reference signal resource configuration
information further includes: reference signal power information of
at least two port groups that is used by the user equipment to
acquire the signal quality measurement information according to the
reference signal port configuration information and in combination
with the reference signal power information of the at least two
port groups.
[0033] In a fourth possible implementation manner, with reference
to the third possible implementation manner of the second aspect,
the acquiring the signal quality measurement information according
to the reference signal port configuration information and in
combination with the reference signal power information of the at
least two port groups includes:
[0034] obtaining, according to the reference signal port
configuration information, signal quality measurement information
corresponding to the at least two port groups;
[0035] performing, according to the reference signal power
information of the at least two port groups, weighted averaging on
the obtained signal quality measurement information corresponding
to the at least two port groups in accordance with a port group
power, to obtain the signal quality measurement information.
[0036] In a fifth possible implementation manner, with reference to
the fourth possible implementation manner of the second aspect, the
performing, according to the reference signal power information of
the at least two port groups, weighted averaging on the obtained
signal quality measurement information corresponding to the at
least two port groups in accordance with a port group power, to
obtain the signal quality measurement information includes:
[0037] obtaining the signal quality measurement information
according to a formula
S Q = ( g = 0 n - 1 p g S Q g ) / ( g = 0 n - 1 p g ) ,
##EQU00002##
where
[0038] SQ.sub.g is signal quality measurement information of a
specified port group, g is a sequence number of a specified port
group, n is a quantity of specified port groups, n.gtoreq.2, and
p.sub.g is a reference signal power of a specified port group,
where the reference signal power of the specified port group is
obtained according to the reference signal power information of the
at least two port groups.
[0039] In a sixth possible implementation manner, with reference to
any one of the second possible implementation manner to the fifth
possible implementation manner of the second aspect, the reference
signal power information of the at least two port groups
includes:
[0040] a reference signal power of a first port group, and a ratio
of a reference signal power of each port group among the rest port
groups to the reference signal power of the first port group;
or
[0041] a reference signal power of a first port group, and a
differential between a reference signal power of each port group
among the rest port groups and the reference signal power of the
first port group.
[0042] In a seventh possible implementation manner, with reference
to any one of the second aspect to the sixth possible
implementation manner, the method further includes:
[0043] sending the signal quality measurement information to the
base station.
[0044] In an eighth possible implementation manner, with reference
to any one of the second aspect to the seventh possible
implementation manner, the signal quality measurement information
is the reference signal received power RSRP, and the method further
includes:
[0045] receiving filter coefficient information sent by the base
station;
[0046] performing, based on the filter coefficient information,
filtering on the reference signal received power RSRP, and
obtaining a path loss estimation value.
[0047] In a ninth possible implementation manner, with reference to
the eighth possible implementation manner of the second aspect, the
method further includes:
[0048] sending an uplink physical channel or an uplink physical
signal to the base station, where a transmit power of the uplink
physical channel or the uplink physical signal is obtained by means
of calculation according to the path loss estimation value.
[0049] In a tenth possible implementation manner, with reference to
the second aspect, the signal quality measurement information
includes: a reference signal received power RSRP, a reference
signal strength indicator RSSI, or a reference signal received
quality RSRQ.
[0050] A third aspect provides a method for measuring communication
quality, including:
[0051] sending reference signal resource configuration information
to user equipment, where the reference signal resource
configuration information includes: reference signal port
configuration information and power ratio information, where the
reference signal port configuration information is used for
indicating a mapping relationship between the reference signal port
and a port group, and the power ratio information is used for
indicating a power ratio of a data channel of at least one port
group to a reference signal; and
[0052] receiving channel state information CSI sent by the user
equipment, where the CSI is obtained by the user equipment
according to the reference signal port configuration information
and the power ratio information.
[0053] In a first possible implementation manner, according to the
third aspect, in the power ratio information:
[0054] power ratios of data channels on antenna ports in each port
group among the at least one port group to a reference signal are
the same; or
[0055] power ratios of data channels on ports in one port group
among the at least one port group and data channels on ports in
another port group to a reference signal are the same.
[0056] In a second possible implementation manner, according to the
third aspect or the first possible implementation manner of the
third aspect, the power ratio information is used for indicating
multiple sets of power ratios of data channels of the at least one
port group to a reference signal; and
[0057] the receiving channel state information CSI sent by the user
equipment includes: receiving multiple sets of channel state
information CSI that are sent by the user equipment, where each set
of channel state information CSI is obtained by the user equipment
according to one set of power ratios among the multiple sets of
power ratios.
[0058] In a third possible implementation manner, with reference to
the third aspect or the first possible implementation manner or the
second possible implementation manner, the channel state
information CSI includes: any one or any combination of a channel
quality indicator CQI, a precoding matrix indicator PMI, and a rank
indicator RI.
[0059] A fourth aspect provides a method for measuring
communication quality. The method includes:
[0060] receiving reference signal resource configuration
information sent by a base station, where the reference signal
resource configuration information includes: reference signal port
configuration information and power ratio information, where the
reference signal port configuration information is used for
indicating a mapping relationship between the reference signal port
and a port group, and the power ratio information is used for
indicating a power ratio of a data channel of at least one port
group to a reference signal;
[0061] obtaining a power ratio of a data channel on each antenna
port in the at least one port group to a reference signal according
to the reference signal port configuration information and the
power ratio information,
[0062] and obtaining channel state information CSI according to the
power ratio of the data channel on each antenna port to the
reference signal; and
[0063] sending the channel state information CSI to the base
station.
[0064] In a first possible implementation manner, according to the
fourth aspect, the obtaining channel state information CSI
according to the power ratio of the data channel on each antenna
port to the reference signal includes:
[0065] obtaining, according to the reference signal on each antenna
port, a channel measurement value corresponding to each antenna
port;
[0066] obtaining a channel estimation value of the data channel on
each antenna port according to the channel measurement value
corresponding to each antenna port and the power ratio of the data
channel on each antenna port to the reference signal; and
[0067] obtaining the channel state information CSI according to the
channel estimation value of the data channel on each antenna
port.
[0068] In a second possible implementation manner, with reference
to the first possible implementation manner, the obtaining a
channel estimation value of the data channel on each antenna port
according to the channel measurement value corresponding to each
antenna port and the power ratio of the data channel on each
antenna port to the reference signal includes:
[0069] obtaining a channel estimation value of a data channel on an
antenna port p according to a formula h.sub.p.ltoreq.= {square root
over (.rho..sub.p)}h.sub.p, where
[0070] p is an index of the antenna port, .rho..sub.p is a power
ratio of the data channel on the antenna port p to a reference
signal, h.sub.p is a channel measurement value corresponding to the
antenna port p, and h.sub.p is a channel estimation value of the
data channel on the antenna port p.
[0071] In a third possible implementation manner, with reference to
the fourth aspect or the first possible implementation manner or
the second possible implementation manner, in the power ratio
information,
[0072] power ratios of data channels on antenna ports in each port
group among the at least one port group to a reference signal are
the same; or
[0073] power ratios of data channels on ports in one port group
among the at least one port group and data channels on ports in
another port group to a reference signal are the same.
[0074] In a fourth possible implementation manner, with reference
to the fourth aspect, the power ratio information is used for
indicating multiple sets of power ratios of data channels of the at
least one port group to a reference signal; and
[0075] the sending the channel state information CSI to the base
station includes:
[0076] sending multiple sets of channel state information CSI to
the base station, where each set of channel state information CSI
is obtained according to one set of power ratios among the multiple
sets of power ratios.
[0077] In a fifth possible implementation manner, with reference to
the fourth aspect or any one of the first possible implementation
manner to the fourth possible implementation manner, the channel
state information CSI includes: any one or any combination of a
channel quality indicator CQI, a precoding matrix indicator PMI,
and a rank indicator RI.
[0078] A fifth aspect provides a network side apparatus. The
network side apparatus includes: a determining unit, and a first
sending unit, where
[0079] the determining unit is configured to determine reference
signal resource configuration information, where the reference
signal resource configuration information includes reference signal
port configuration information, where the reference signal port
configuration information is used for indicating a mapping
relationship between a reference signal port and a port group;
and
[0080] the first sending unit is configured to send, to user
equipment, the reference signal resource configuration information
determined by the determining unit, so that the user equipment
acquires signal quality measurement information according to the
reference signal port configuration information.
[0081] In a first possible implementation manner, according to the
fifth aspect, the reference signal resource configuration
information determined by the determining unit further includes:
reference signal power information of at least two port groups that
is used by the user equipment to acquire the signal quality
measurement information according to the reference signal port
configuration information and in combination with the reference
signal power information of the at least two port groups; and
[0082] the reference signal power information of the at least two
port groups includes:
[0083] a reference signal power of a first port group, and a ratio
of a reference signal power of each port group among the rest port
groups to the reference signal power of the first port group;
or
[0084] a reference signal power of a first port group, and a
differential between a reference signal power of each port group
among the rest port groups and the reference signal power of the
first port group.
[0085] In a second possible implementation manner, with reference
to the fifth aspect or the first possible implementation manner,
when the signal quality measurement information is a reference
signal received power RSRP, the first sending unit is further
configured to send, to the user equipment, filter coefficient
information that is used by the user equipment to perform, based on
the filter coefficient information, filtering on the reference
signal received power RSRP and obtain a path loss estimation
value.
[0086] In a third possible implementation manner, with reference to
the second possible implementation manner, the apparatus further
includes:
[0087] a first receiving unit, configured to receive an uplink
physical channel or an uplink physical signal sent by the user
equipment, where a transmit power of the uplink physical channel or
the uplink physical signal is obtained by means of calculation by
the user equipment according to the path loss estimation value.
[0088] In a fourth possible implementation manner, with reference
to the fifth aspect or the first possible implementation manner,
the signal quality measurement information includes:
[0089] any one or any combination of a reference signal received
power RSRP, a reference signal received quality RSRQ, and a
reference signal strength indicator RSSI.
[0090] In a fifth possible implementation manner, with reference to
the fifth aspect or any one of the first possible implementation
manner to the fourth possible implementation manner, the apparatus
further includes: a second receiving unit, where
[0091] the second receiving unit is configured to receive the
signal quality measurement information sent by the user
equipment.
[0092] A sixth aspect provides user equipment. The user equipment
includes: a third receiving unit, a first acquiring unit, and a
second acquiring unit, where
[0093] the third receiving unit is configured to receive reference
signal resource configuration information sent by a base station,
where the reference signal resource configuration information
includes reference signal port configuration information, where the
reference signal port configuration information is used for
indicating a mapping relationship between a reference signal port
and a port group;
[0094] the first acquiring unit is configured to obtain reference
signal port information in at least one port group according to the
reference signal port configuration information received by the
third receiving unit; and
[0095] the second acquiring unit is configured to acquire signal
quality measurement information according to the reference signal
port information, in the at least one port group, obtained by the
first acquiring unit.
[0096] In a first possible implementation manner, according to the
sixth aspect, the first acquiring unit is specifically configured
to obtain reference signal port information in one specified port
group according to the reference signal port configuration
information received by the third receiving unit; and
[0097] the second acquiring unit is specifically configured to
acquire the signal quality measurement information according to the
reference signal port information, in the one specified port group,
obtained by the first acquiring unit.
[0098] In a second possible implementation manner, according to the
first possible implementation manner of the sixth aspect, when the
signal quality measurement information is a reference signal
received power RSRP, the second acquiring unit is specifically
configured to:
[0099] obtain a reference signal received power RSRP(r,p) of a pth
port of an rth receive antenna according to a formula
R S R P ( r , p ) = 1 K s - 1 m = 0 K s - 1 h ^ p ( m ) h ^ p ( m +
1 ) ##EQU00003##
and obtain the RSRP by combining RSRP(r,p), where h.sub.p(m) is a
channel estimation on a reference signal RE whose label number is
m, K.sub.s is a total sample quantity of usable reference signal
REs in measurement bandwidth, p is a number of a reference signal
port in the one specified port group, and r is an index of a
receive antenna.
[0100] In a third possible implementation manner, with reference to
the sixth aspect, the reference signal resource configuration
information received by the third receiving unit further includes:
reference signal power information of at least two port groups,
and
[0101] the second acquiring unit is further configured to acquire
the signal quality measurement information according to the
reference signal port configuration information and in combination
with the reference signal power information of the at least two
port groups.
[0102] In a fourth possible implementation manner, with reference
to the third possible implementation manner of the sixth aspect,
the second acquiring unit is specifically configured to:
[0103] obtain, according to the reference signal port configuration
information, signal quality measurement information corresponding
to the at least two port groups; and
[0104] perform, according to the reference signal power information
of the at least two port groups, weighted averaging on the obtained
signal quality measurement information corresponding to the at
least two port groups in accordance with a port group power, to
obtain the signal quality measurement information.
[0105] In a fifth possible implementation manner, with reference to
the fourth possible implementation manner of the sixth aspect, the
performing, by the second acquiring unit, according to the
reference signal power information of the at least two port groups,
weighted averaging on the obtained signal quality measurement
information corresponding to the at least two port groups in
accordance with a port group power, to obtain the signal quality
measurement information includes:
[0106] obtaining the signal quality measurement information
according to a formula
S Q = ( g = 0 n - 1 p g S Q g ) / ( g = 0 n - 1 p g ) ,
##EQU00004##
where
[0107] SQ.sub.g is signal quality measurement information of a
specified port group, g is a sequence number of a specified port
group, n is a quantity of specified port groups, n.gtoreq.2, and
p.sub.g is a reference signal power of a specified port group,
where the reference signal power of the specified port group is
obtained according to the reference signal power information of the
at least two port groups.
[0108] In a sixth possible implementation manner, with reference to
any one of the second possible implementation manner to the fifth
possible implementation manner of the sixth aspect, the reference
signal power information, of the at least two port groups, received
by the third receiving unit includes:
[0109] a reference signal power of a first port group, and a ratio
of a reference signal power of each port group among the rest port
groups to the reference signal power of the first port group;
or
[0110] a reference signal power of a first port group, and a
differential between a reference signal power of each port group
among the rest port groups and the reference signal power of the
first port group.
[0111] In a seventh possible implementation manner, with reference
to any one of the sixth aspect to the sixth possible implementation
manner, the user equipment further includes: a second sending unit,
configured to send the signal quality measurement information to
the base station.
[0112] In an eighth possible implementation manner, with reference
to any one of the sixth aspect to the seventh possible
implementation manner, the third receiving unit is further
configured to: when the signal quality measurement information is
the reference signal received power RSRP, receive filter
coefficient information sent by the base station; and
[0113] the user equipment further includes: a third acquiring unit,
where
[0114] the third acquiring unit is configured to perform, based on
the filter coefficient information received by the third receiving
unit, filtering on the reference signal received power RSRP, and
obtain a path loss estimation value.
[0115] In a ninth possible implementation manner, with reference to
the eighth possible implementation manner of the sixth aspect, the
user equipment further includes: a third sending unit, where
[0116] the third sending unit is further configured to send an
uplink physical channel or an uplink physical signal to the base
station, where a transmit power of the uplink physical channel or
the uplink physical signal is obtained by means of calculation
according to the path loss estimation value.
[0117] In a tenth possible implementation manner, with reference to
the sixth aspect, the signal quality measurement information
includes: a reference signal received power RSRP, a reference
signal strength indicator RSSI, or a reference signal received
quality RSRQ.
[0118] A seventh aspect provides a network side apparatus. The
apparatus includes: a fourth sending unit and a fourth receiving
unit, where
[0119] the fourth sending unit is configured to send reference
signal resource configuration information to user equipment, where
the reference signal resource configuration information includes:
reference signal port configuration information and power ratio
information, where the reference signal port configuration
information is used for indicating a mapping relationship between
the reference signal port and a port group, and the power ratio
information is used for indicating a power ratio of a data channel
of at least one port group to a reference signal; and
[0120] the fourth receiving unit is configured to receive channel
state information CSI sent by the user equipment, where the CSI is
obtained by the user equipment according to the reference signal
port configuration information and the power ratio information.
[0121] In a first possible implementation manner, according to the
seventh aspect, in the power ratio information:
[0122] power ratios of data channels on antenna ports in each port
group among the at least one port group to a reference signal are
the same; or
[0123] power ratios of data channels on ports in one port group
among the at least one port group and data channels on ports in
another port group to a reference signal are the same.
[0124] In a second possible implementation manner, according to the
seventh aspect or the first possible implementation manner of the
seventh aspect, the power ratio information is used for indicating
multiple sets of power ratios of data channels of the at least one
port group to a reference signal; and
[0125] the fourth receiving unit is specifically configured to
receive multiple sets of channel state information CSI that are
sent by the user equipment, where each set of channel state
information CSI is obtained by the user equipment according to one
set of power ratios among the multiple sets of power ratios.
[0126] In a third possible implementation manner, with reference to
the seventh aspect or the first possible implementation manner or
the second possible implementation manner, the channel state
information CSI received by the fourth receiving unit includes: any
one or any combination of a channel quality indicator CQI, a
precoding matrix indicator PMI, and a rank indicator RI.
[0127] An eighth aspect provides user equipment. The user equipment
includes: a fifth receiving unit, a fourth acquiring unit, a fifth
acquiring unit, and a fifth sending unit, where
[0128] the fifth receiving unit is configured to receive reference
signal resource configuration information sent by a base station,
where the reference signal resource configuration information
includes: reference signal port configuration information and power
ratio information, where the reference signal port configuration
information is used for indicating a mapping relationship between
the reference signal port and a port group, and the power ratio
information is used for indicating a power ratio of a data channel
of at least one port group to a reference signal;
[0129] the fourth acquiring unit is configured to obtain a power
ratio of a data channel on each antenna port in the at least one
port group to a reference signal according to the reference signal
port configuration information and the power ratio information that
are received by the fifth receiving unit;
[0130] the fifth acquiring unit is configured to obtain channel
state information CSI according to the power ratio, of the data
channel on each antenna port to the reference signal, obtained by
the fourth acquiring unit; and
[0131] the fifth sending unit is configured to send, to the base
station, the channel state information CSI obtained by the fifth
acquiring unit.
[0132] In a first possible implementation manner, according to the
eighth aspect, the fifth acquiring unit is specifically configured
to:
[0133] obtain, according to the reference signal on each antenna
port, a channel measurement value corresponding to each antenna
port;
[0134] obtain a channel estimation value of the data channel on
each antenna port according to the channel measurement value
corresponding to each antenna port and the power ratio of the data
channel on each antenna port to the reference signal; and
[0135] obtain the channel state information CSI according to the
channel estimation value of the data channel on each antenna
port.
[0136] In a second possible implementation manner, with reference
to the first possible implementation manner, the obtaining, by the
fifth acquiring unit, a channel estimation value of the data
channel on each antenna port according to the channel measurement
value corresponding to each antenna port and the power ratio of the
data channel on each antenna port to the reference signal
includes:
[0137] obtaining a channel estimation value of a data channel on an
antenna port p according to a formula {right arrow over (h)}.sub.p=
{square root over (.rho..sub.p)}h.sub.p, where
[0138] p is an index of the antenna port, .rho..sub.p is a power
ratio of the data channel on the antenna port p to a reference
signal, h.sub.p is a channel measurement value corresponding to the
antenna port p, and h.sub.p is a channel estimation value of the
data channel on the antenna port p.
[0139] In a third possible implementation manner, with reference to
the eighth aspect or the first possible implementation manner or
the second possible implementation manner, in the power ratio
information,
[0140] power ratios of data channels on antenna ports in each port
group among the at least one port group to a reference signal are
the same; or
[0141] power ratios of data channels on ports in one port group
among the at least one port group and data channels on ports in
another port group to a reference signal are the same.
[0142] In a fourth possible implementation manner, with reference
to the eighth aspect, the reference signal resource configuration
information received by the fifth receiving unit includes: the
reference signal port configuration information and the power ratio
information, where
[0143] the power ratio information is used for indicating multiple
sets of power ratios of data channels of the at least one port
group to a reference signal; and
[0144] the fifth sending unit is specifically configured to:
[0145] send multiple sets of channel state information CSI to the
base station, where each set of channel state information CSI is
obtained according to one set of power ratios among the multiple
sets of power ratios.
[0146] In a fifth possible implementation manner, with reference to
the eighth aspect or any one of the first possible implementation
manner to the fourth possible implementation manner, the channel
state information CSI obtained by the fifth acquiring unit
includes: any one or any combination of a channel quality indicator
CQI, a precoding matrix indicator PMI, and a rank indicator RI.
[0147] A ninth aspect provides a network side apparatus. The
network side apparatus includes: a receiver, a processor, and a
transmitter, where
[0148] the processor is configured to determine reference signal
resource configuration information, where the reference signal
resource configuration information includes reference signal port
configuration information, where the reference signal port
configuration information is used for indicating a mapping
relationship between a reference signal port and a port group;
and
[0149] the transmitter is configured to send the reference signal
resource configuration information to user equipment, so that the
user equipment acquires signal quality measurement information
according to the reference signal port configuration
information.
[0150] In a first possible implementation manner, according to the
ninth aspect, the reference signal resource configuration
information determined by the processor further includes: reference
signal power information of at least two port groups that is used
by the user equipment to acquire the signal quality measurement
information according to the reference signal port configuration
information and in combination with the reference signal power
information of the at least two port groups; and
[0151] the reference signal power information of the at least two
port groups includes:
[0152] a reference signal power of a first port group, and a ratio
of a reference signal power of each port group among the rest port
groups to the reference signal power of the first port group;
or
[0153] a reference signal power of a first port group, and a
differential between a reference signal power of each port group
among the rest port groups and the reference signal power of the
first port group.
[0154] In a second possible implementation manner, with reference
to the ninth aspect or the first possible implementation manner,
when the signal quality measurement information is a reference
signal received power RSRP, the transmitter is further configured
to send, to the user equipment, filter coefficient information that
is used by the user equipment to perform, based on the filter
coefficient information, filtering on the reference signal received
power RSRP and obtain a path loss estimation value.
[0155] In a third possible implementation manner, with reference to
the second possible implementation manner, the receiver is
configured to receive an uplink physical channel or an uplink
physical signal sent by the user equipment, where a transmit power
of the uplink physical channel or the uplink physical signal is
obtained by means of calculation by the user equipment according to
the path loss estimation value.
[0156] In a fourth possible implementation manner, with reference
to the ninth aspect or the first possible implementation manner,
the signal quality measurement information includes:
[0157] any one or any combination of a reference signal received
power RSRP, a reference signal received quality RSRQ, and a
reference signal strength indicator RSSI.
[0158] In a fifth possible implementation manner, with reference to
the ninth aspect or any one of the first possible implementation
manner to the fourth possible implementation manner, the receiver
is further configured to receive the signal quality measurement
information sent by the user equipment.
[0159] A tenth aspect provides user equipment. The user equipment
includes: a receiver, a processor, and a transmitter, where
[0160] the receiver is configured to receive reference signal
resource configuration information sent by a base station, where
the reference signal resource configuration information includes
reference signal port configuration information, where the
reference signal port configuration information is used for
indicating a mapping relationship between a reference signal port
and a port group; and
[0161] the processor is configured to obtain reference signal port
information in at least one port group according to the reference
signal port configuration information; and acquire signal quality
measurement information according to the reference signal port
information in the at least one port group.
[0162] In a first possible implementation manner, according to the
tenth aspect, the processor is specifically configured to:
[0163] obtain reference signal port information in one specified
port group according to the reference signal port configuration
information; and
[0164] acquire the signal quality measurement information according
to the reference signal port information in the one specified port
group.
[0165] In a second possible implementation manner, according to the
first possible implementation manner of the tenth aspect, when the
signal quality measurement information is a reference signal
received power RSRP, the acquiring, by the processor, the signal
quality measurement information according to the reference signal
port information in the one specified port group includes:
[0166] obtaining a reference signal received power RSRP(r,p) of a
pth port of an rth receive antenna according to a formula
R S R P ( r , p ) = 1 K s - 1 m = 0 K s - 1 h ^ p ( m ) h ^ p ( m +
1 ) ##EQU00005##
and obtaining the RSRP by combining RSRP(r,p), where h.sub.p(m) is
a channel estimation on a reference signal RE whose label number is
m, K.sub.s is a total sample quantity of usable reference signal
REs in measurement bandwidth, p is a number of a reference signal
port in the one specified port group, and r is an index of a
receive antenna.
[0167] In a third possible implementation manner, with reference to
the tenth aspect, the reference signal resource configuration
information received by the receiver further includes: reference
signal power information of at least two port groups that is used
by the user equipment to acquire the signal quality measurement
information according to the reference signal port configuration
information and in combination with the reference signal power
information of the at least two port groups.
[0168] In a fourth possible implementation manner, with reference
to the third possible implementation manner of the tenth aspect,
the acquiring, by the processor, the signal quality measurement
information according to the reference signal port configuration
information and in combination with the reference signal power
information of the at least two port groups includes:
[0169] obtaining, according to the reference signal port
configuration information, signal quality measurement information
corresponding to the at least two port groups; and
[0170] performing, according to the reference signal power
information of the at least two port groups, weighted averaging on
the obtained signal quality measurement information corresponding
to the at least two port groups in accordance with a port group
power, to obtain the signal quality measurement information.
[0171] In a fifth possible implementation manner, with reference to
the fourth possible implementation manner of the tenth aspect, the
performing, by the processor, according to the reference signal
power information of the at least two port groups, weighted
averaging on the obtained signal quality measurement information
corresponding to the at least two port groups in accordance with a
port group power, to obtain the signal quality measurement
information includes:
[0172] obtaining the signal quality measurement information
according to a formula
S Q = ( g = 0 n - 1 p g S Q g ) / ( g = 0 n - 1 p g ) ,
##EQU00006##
where
[0173] SQ.sub.g is signal quality measurement information of a
specified port group, g is a sequence number of a specified port
group, n is a quantity of specified port groups, n.gtoreq.2, and
p.sub.g is a reference signal power of a specified port group,
where the reference signal power of the specified port group is
obtained according to the reference signal power information of the
at least two port groups.
[0174] In a sixth possible implementation manner, with reference to
any one of the second possible implementation manner to the fifth
possible implementation manner of the tenth aspect, the reference
signal power information, of the at least two port groups, received
by the receiver includes:
[0175] a reference signal power of a first port group, and a ratio
of a reference signal power of each port group among the rest port
groups to the reference signal power of the first port group;
or
[0176] a reference signal power of a first port group, and a
differential between a reference signal power of each port group
among the rest port groups and the reference signal power of the
first port group.
[0177] In a seventh possible implementation manner, with reference
to any one of the tenth aspect to the sixth possible implementation
manner, the transmitter is configured to send the signal quality
measurement information to the base station.
[0178] In an eighth possible implementation manner, with reference
to any one of the tenth aspect to the seventh possible
implementation manner, when the signal quality measurement
information is the reference signal received power RSRP, the
receiver is further configured to receive filter coefficient
information sent by the base station; and
[0179] the processor is further configured to perform, based on the
filter coefficient information, filtering on the reference signal
received power RSRP, and obtain a path loss estimation value.
[0180] In a ninth possible implementation manner, with reference to
the eighth possible implementation manner of the tenth aspect, the
transmitter is further configured to send an uplink physical
channel or an uplink physical signal to the base station, where a
transmit power of the uplink physical channel or the uplink
physical signal is obtained by means of calculation according to
the path loss estimation value.
[0181] In a tenth possible implementation manner, with reference to
the tenth aspect, the signal quality measurement information
includes: a reference signal received power RSRP, a reference
signal strength indicator RSSI, or a reference signal received
quality RSRQ.
[0182] An eleventh aspect provides a network side apparatus. The
network side apparatus includes: a transmitter and a receiver,
where
[0183] the transmitter is configured to send reference signal
resource configuration information to user equipment, where the
reference signal resource configuration information includes:
reference signal port configuration information and power ratio
information, where the reference signal port configuration
information is used for indicating a mapping relationship between
the reference signal port and a port group, and the power ratio
information is used for indicating a power ratio of a data channel
of at least one port group to a reference signal; and the receiver
is configured to receive channel state information CSI sent by the
user equipment, where the CSI is obtained by the user equipment
according to the reference signal port configuration information
and the power ratio information.
[0184] In a first possible implementation manner, according to the
eleventh aspect, in the power ratio information:
[0185] power ratios of data channels on antenna ports in each port
group among the at least one port group to a reference signal are
the same; or
[0186] power ratios of data channels on ports in one port group
among the at least one port group and data channels on ports in
another port group to a reference signal are the same.
[0187] In a second possible implementation manner, according to the
eleventh aspect or the first possible implementation manner of the
seventh aspect, the power ratio information is used for indicating
multiple sets of power ratios of data channels of the at least one
port group to a reference signal; and
[0188] the receiving, by the receiver, channel state information
CSI sent by the user equipment includes: receiving multiple sets of
channel state information CSI that are sent by the user equipment,
where each set of channel state information CSI is obtained by the
user equipment according to one set of power ratios among the
multiple sets of power ratios.
[0189] In a third possible implementation manner, with reference to
the eleventh aspect or the first possible implementation manner or
the second possible implementation manner, the channel state
information CSI received by the receiver includes: any one or any
combination of a channel quality indicator CQI, a precoding matrix
indicator PMI, and a rank indicator RI.
[0190] A twelfth aspect provides user equipment. The user equipment
includes: a receiver, a processor, and a transmitter, where
[0191] the receiver is configured to receive reference signal
resource configuration information sent by a base station, where
the reference signal resource configuration information includes:
reference signal port configuration information and power ratio
information, where the reference signal port configuration
information is used for indicating a mapping relationship between
the reference signal port and a port group, and the power ratio
information is used for indicating a power ratio of a data channel
of at least one port group to a reference signal;
[0192] the processor is configured to obtain a power ratio of a
data channel on each antenna port in the at least one port group to
a reference signal according to the reference signal port
configuration information and the power ratio information, and
obtain channel state information CSI according to the power ratio
of the data channel on each antenna port to the reference signal;
and
[0193] the transmitter is configured to send the channel state
information CSI to the base station.
[0194] In a first possible implementation manner, according to the
twelfth aspect, the obtaining, by the processor, channel state
information CSI according to the power ratio of the data channel on
each antenna port to the reference signal includes:
[0195] obtaining, according to the reference signal on each antenna
port, a channel measurement value corresponding to each antenna
port;
[0196] obtaining a channel estimation value of the data channel on
each antenna port according to the channel measurement value
corresponding to each antenna port and the power ratio of the data
channel on each antenna port to the reference signal; and obtaining
the channel state information CSI according to the channel
estimation value of the data channel on each antenna port.
[0197] In a second possible implementation manner, with reference
to the first possible implementation manner, the obtaining, by the
processor, a channel estimation value of the data channel on each
antenna port according to the channel measurement value
corresponding to each antenna port and the power ratio of the data
channel on each antenna port to the reference signal includes:
[0198] obtaining a channel estimation value of a data channel on an
antenna port p according to a formula h.sub.p= {square root over
(.rho..sub.p)}h.sub.p, where p is an index of the antenna port,
.rho..sub.p is a power ratio of the data channel on the antenna
port p to a reference signal, h.sub.p is a channel measurement
value corresponding to the antenna port p, and h.sub.p is a channel
estimation value of the data channel on the antenna port p.
[0199] In a third possible implementation manner, with reference to
the twelfth aspect or the first possible implementation manner or
the second possible implementation manner, in the power ratio
information,
[0200] power ratios of data channels on antenna ports in each port
group among the at least one port group to a reference signal are
the same; or
[0201] power ratios of data channels on ports in one port group
among the at least one port group and data channels on ports in
another port group to a reference signal are the same.
[0202] In a fourth possible implementation manner, with reference
to the twelfth aspect, the power ratio information is used for
indicating multiple sets of power ratios of data channels of the at
least one port group to a reference signal; and
[0203] the transmitter is specifically configured to:
[0204] send multiple sets of channel state information CSI to the
base station, where each set of channel state information CSI is
obtained according to one set of power ratios among the multiple
sets of power ratios.
[0205] In a fifth possible implementation manner, with reference to
the twelfth aspect or any one of the first possible implementation
manner to the fourth possible implementation manner, the channel
state information CSI obtained by the processor includes: any one
or any combination of a channel quality indicator CQI, a precoding
matrix indicator PMI, and a rank indicator RI.
[0206] According to the method and apparatus for measuring
communication quality provided in the embodiments of the present
disclosure, reference signal resource configuration information is
sent to UE on a user side, and the UE may perform processing
according to reference signal quality, of one port group or
multiple port groups, in the reference signal resource
configuration information to obtain final signal quality
measurement information, so that a UE side can distinguish ports
according to different port groups, which differs from a case in
which transmit powers of different ports cannot be distinguished in
the prior art. Therefore, in one aspect, UE is enabled to acquire
signal quality measurement information, so that the UE can perform
more accurate cell selection and uplink power control; in another
aspect, the UE is enabled to acquire channel state information, so
that the UE can perform more accurate modulation and coding scheme
(MCS) selection or scheduling, thereby increasing a throughput of a
system.
BRIEF DESCRIPTION OF THE DRAWINGS
[0207] To describe the technical solutions in the embodiments of
the present disclosure more clearly, the following briefly
introduces the accompanying drawings required for describing the
embodiments. Apparently, the accompanying drawings in the following
description show merely some embodiments of the present disclosure,
and a person of ordinary skill in the art may still derive other
drawings from these accompanying drawings without creative
efforts.
[0208] FIG. 1 is a flowchart of a method for measuring
communication quality according to Embodiment 1 of the present
disclosure;
[0209] FIG. 2 is a flowchart of a method for measuring
communication quality according to Embodiment 2 of the present
disclosure;
[0210] FIG. 3 is a brief schematic diagram of different uniform
linear array antenna array configurations;
[0211] FIG. 4 is a brief schematic diagram of different
cross-polarization antenna array configurations;
[0212] FIG. 5 is a flowchart of a method for measuring
communication quality according to Embodiment 3 of the present
disclosure;
[0213] FIG. 6 is a flowchart of a method for measuring
communication quality according to Embodiment 4 of the present
disclosure;
[0214] FIG. 7 is a brief schematic diagram of a network side
apparatus according to Embodiment 5 of the present disclosure;
[0215] FIG. 8 is a brief schematic diagram of user equipment
according to Embodiment 6 of the present disclosure;
[0216] FIG. 9 is a brief schematic diagram of a network side
apparatus according to Embodiment 7 of the present disclosure;
[0217] FIG. 10 is a brief schematic diagram of user equipment
according to Embodiment 8 of the present disclosure;
[0218] FIG. 11 is a brief schematic diagram of a network side
apparatus according to Embodiment 9 of the present disclosure;
[0219] FIG. 12 is a brief schematic diagram of user equipment
according to Embodiment 10 of the present disclosure;
[0220] FIG. 13 is a brief schematic diagram of a network side
apparatus according to Embodiment 11 of the present disclosure;
and
[0221] FIG. 14 is a brief schematic diagram of user equipment
according to Embodiment 12 of the present disclosure.
DETAILED DESCRIPTION
[0222] The following clearly describes the technical solutions in
the embodiments of the present disclosure with reference to the
accompanying drawings in the embodiments of the present disclosure.
Apparently, the described embodiments are merely some but not all
of the embodiments of the present disclosure. All other embodiments
obtained by a person of ordinary skill in the art based on the
embodiments of the present disclosure without creative efforts
shall fall within the protection scope of the present
disclosure.
Embodiment 1
[0223] An embodiment of the present disclosure provides a method
for measuring communication quality. As shown in FIG. 1, the method
includes:
[0224] Step S01: Determine reference signal resource configuration
information, where the reference signal resource configuration
information includes: reference signal port configuration
information, where the reference signal port configuration
information is used for indicating a mapping between the reference
signal port and a port group.
[0225] The operation may specifically be executed on a base station
side or a network side (for example, a Universal Terrestrial Radio
Access Network (UTRAN)), or an evolved UTRAN, or an evolved node
B.
[0226] When the reference signal resource configuration information
includes the reference signal port configuration information, and
optionally, the reference signal resource configuration information
may further include reference signal power information of at least
one port group, the reference signal resource configuration
information is sent to user equipment (UE), so that the user
equipment acquires signal quality measurement information according
to the reference signal resource configuration information. Because
reference signal ports are allocated to multiple groups, the UE may
perform processing according to reference signal quality, of one
port group or multiple port groups, in the reference signal
resource configuration information to obtain final signal quality
measurement information, so that a UE side can distinguish ports
according to different port groups, which differs from a case in
which transmit powers of different ports cannot be distinguished in
the prior art. Therefore, the signal quality measurement
information acquired in the solution enables the UE to perform more
accurate cell selection and uplink power control.
[0227] It should be further understood that for detailed
description of the reference signal port configuration information
included in the reference signal resource configuration
information, reference may be made to the description of step 101
in Embodiment 2.
[0228] Further, the reference signal resource configuration
information may further include: any one of a reference signal
configuration and a reference signal subframe configuration.
Therefore, the UE can receive a reference signal according to the
information. It should be understood that, however, this embodiment
of the present disclosure does not limit that any one of the
reference signal configuration and the reference signal subframe
configuration is necessarily delivered to the UE by using the
reference signal resource configuration information, and may also
be delivered to the UE in a form of other information. It should be
pointed out that the reference signal configuration or the
reference signal subframe configuration may also be predefined, or
is implicitly derived according to a parameter, for example, a cell
ID or a UE ID, that is known in advance, and is known to both a
base station and the UE, which is not limited in this embodiment of
the present disclosure.
[0229] Step S02: Send the determined reference signal resource
configuration information to user equipment, so that the user
equipment acquires signal quality measurement information according
to the reference signal port configuration information.
[0230] Specifically, the foregoing signal quality measurement
information may include:
[0231] any one or any combination of a reference signal received
power RSRP, a reference signal received quality RSRQ, and a
reference signal strength indicator RSSI.
[0232] According to the method described in Embodiment 1 above, in
the method, reference signal resource configuration information is
determined on a network side, and the reference signal resource
configuration information is sent to a user side, where the
reference signal resource configuration information includes
reference signal port configuration information, where the
reference signal port configuration information is used for
indicating a mapping between the reference signal port and a port
group. In the method, it can be avoided that reference signal power
related information is indicated port by port, so as to reduce a
signaling overhead; further, a uniform power indicator is used for
ports in a port group, and for different port groups, power related
information of the port groups may be indicated independently, so
that full use of an antenna configuration or an antenna array
structure is made, thereby enabling a system to flexibly select
reference signal power related information according to the antenna
configuration or the antenna array structure; because an antenna
array may have symmetric weights, by means of the symmetry of the
weights, design complexity in beamforming or side lobe suppression
can be reduced.
[0233] Further, the reference signal resource configuration
information is sent to UE on the user side, and the UE may perform
processing according to reference signal quality of at least one
port group in the reference signal resource configuration
information to obtain final signal quality measurement information,
so that a UE side can distinguish ports according to different port
groups, which differs from a case in which transmit powers of
different ports cannot be distinguished in the prior art. The UE is
enabled to acquire signal quality measurement information, so that
the UE can perform more accurate cell selection and uplink power
control.
[0234] Optionally, the method further includes:
[0235] Step S03: Receive the signal quality measurement information
sent by the user equipment.
[0236] Optionally, when the signal quality measurement information
is a reference signal received power RSRP, the method further
includes:
[0237] Step S04: Send, to the user equipment, filter coefficient
information that is used by the user equipment to perform, based on
the filter coefficient information, filtering on the reference
signal received power RSRP and obtain a path loss estimation
value.
[0238] Specifically, the filter coefficient information may be sent
to the user equipment at a same time when the determined reference
signal resource configuration information is sent to the user
equipment in step S02, for example, the filter coefficient
information and the determined reference signal resource
configuration information are sent in a same subframe; or may be
sent before or after the determined reference signal resource
configuration information is sent to the user equipment in step
S02. The filter coefficient information and the reference signal
resource configuration information may be sent in an information
element (IE) of same or different higher layer signaling such as
RRC signaling, or same or different downlink control information
(DCI).
[0239] Optionally, the method further includes:
[0240] Step S05: Receive an uplink physical channel or an uplink
physical signal sent by the user equipment, where a transmit power
of the uplink physical channel or the uplink physical signal is
obtained by means of calculation by the user equipment according to
the path loss estimation value.
[0241] Optionally, the reference signal resource configuration
information further includes: reference signal power information of
at least two port groups that is used by the user equipment to
acquire the signal quality measurement information according to the
reference signal port configuration information and in combination
with the reference signal power information of the at least two
port groups; and
[0242] the reference signal power information of the at least two
port groups includes:
[0243] a reference signal power of a first port group, and a ratio
of a reference signal power of each port group among the rest port
groups to the reference signal power of the first port group;
or
[0244] a reference signal power of a first port group, and a
differential between a reference signal power of each port group
among the rest port groups and the reference signal power of the
first port group.
[0245] Optionally, the reference signal port configuration
information is a single index, or is a double index, or is an index
after combined coding.
[0246] Optionally, the reference signal power information of the
port group at least includes: reference signal powers of ports in
one port group are the same.
[0247] The first port group is one port group among the at least
one port group.
Embodiment 2
[0248] This embodiment of the present disclosure provides a method
for measuring communication quality. As shown in FIG. 2, the method
includes:
[0249] Step 101: Receive reference signal resource configuration
information sent by a base station, where the reference signal
resource configuration information includes reference signal port
configuration information, where the reference signal port
configuration information is used for indicating a mapping
relationship between a reference signal port and a port group.
[0250] Specifically, UE receives the reference signal resource
configuration information, which may be that the UE receives, by
using higher layer signaling (for example, radio resource control
(RRC) signaling) or dynamic signaling (for example, downlink
control information (DCI)), the reference signal resource
configuration information notified by an eNB, or obtains, based on
a cell identity (ID), the reference signal resource configuration
information. The higher layer signaling may be sent by using a data
channel such as a physical downlink shared channel (PDSCH). The
dynamic signaling, for example, the DCI, is sent by using a control
channel such as a physical downlink control channel (PDCCH) or an
enhanced PDCCH (ePDCCH).
[0251] It should be understood that the reference signal port
configuration information is used for indicating a mapping between
a reference signal port and a port group. The mapping relationship
between a reference signal port and a port group may be predefined,
and is known to both the base station and the user equipment.
Therefore, a base station side and a user equipment side can both
find the reference signal port configuration message by means of
identification.
[0252] It should be further understood that according to
information about a mapping relationship between a reference signal
port group and a corresponding port, and a mapping index of the
port group, a port included in the port group may be uniquely
determined. As shown in Tables 1 to 3, after learning the
information about the mapping relationship between a reference
signal port group and a corresponding port, and the mapping index
of the port group, a device can learn a port in the corresponding
port group. Ports included in the port group may be predefined, and
for a different index, a predefined port group may be obtained
according to planning. It should be noted that one reference signal
port corresponds to one antenna port, and one antenna port
corresponds to one reference signal port. Channel information of an
antenna signal port is obtained by means of measurement of a
reference signal port. Therefore, usually the predefined port group
may be obtained according to planning of an antenna port array
configuration.
[0253] One reference signal port or antenna port usually
corresponds to one physical antenna or one virtual antenna, where
the virtual antenna may be obtained by means of weighted
combination of multiple physical antennas. An actual antenna
deployment may have a different antenna configuration and antenna
port array form. For example, FIG. 3 shows different uniform linear
array (ULA) antenna port array configurations. An antenna port
array A is a 2-row 4-column uniform linear array, an antenna port
array B is a 2-row 8-column uniform linear array, and an antenna
port array C is a 4-row 4-column uniform linear array. Although
both the antenna port array B and the antenna port array C have 16
ports, array forms of the antenna port array B and the antenna port
array C are also different. For another example, FIG. 4 shows
different cross-polarization (XPO) antenna array configurations. An
antenna port array A is a 2-row 2-column cross-polarization antenna
array, an antenna port array B is a 2-row 4-column uniform linear
array, and an antenna port array C is a 4-row 2-column uniform
linear array. Different polarization antennas may be located in a
same column. Although both the antenna port array B and the antenna
port array C have 16 ports, array forms of the antenna port array B
and the antenna port array C are also different. The antenna port
array is referred to as an antenna array for short below.
[0254] Optionally, as another embodiment, the reference signal port
configuration information includes a quantity of reference signal
ports and a mapping index, where the mapping index is used for
indicating a mapping between a reference signal port group and a
corresponding port. 8-antenna arrays represented by the antenna
array A shown in FIG. 3 and the antenna array A shown in FIG. 4 are
used as examples. The reference signal port configuration
information includes: a quantity of reference signal ports is 8 and
a mapping index is 0 or 1. The predefined mapping relationship
between a reference signal port and a port group may be defined by
using a function, or may be regulated by using a predefined table.
For example, as shown in Table 1, the first row may be the
reference signal port configuration information of the antenna
array A in FIG. 3, and the mapping indication information includes:
a quantity of reference signal ports is 8, a mapping index is 0,
and two port groups are a port group 0 and a port group 1. The
second row in Table 1 may be the reference signal port
configuration information of the antenna array A in FIG. 4, and the
mapping indication information includes: a quantity of reference
signal ports is 8, a mapping index is 1, and two port groups are a
port group 0 and a port group 1. It should be pointed out that, in
this embodiment, a reference signal port and a reference signal
port group may be interchangeable with an antenna port and an
antenna port group.
TABLE-US-00001 TABLE 1 Mapping between a port and a port group
Mapping between a port and a port group Index 0 1 0 0, 3, 4, 7 1,
2, 5, 6 1 0, 1, 4, 5 2, 3, 6, 7
[0255] Further, when a mapping index value is 0, the port group 0
includes reference signal ports (or antenna ports) 0, 3, 4, and 7,
the port group 1 includes reference signal ports (or antenna ports)
1, 2, 5, and 6; when a mapping index value is 1, the port group 0
includes reference signal ports (or antenna ports) 0, 1, 4, and 5,
the port group 1 includes reference signal ports (or antenna ports)
2, 3, 6, and 7.
[0256] 16-antenna arrays represented by the antenna array B or the
antenna array C shown in FIG. 3 and the antenna array B or the
antenna array C shown in FIG. 4 are used as examples. The reference
signal port configuration information includes: a quantity of
reference signal ports is 16, and a mapping index is 0 or 1 or 2 or
3. The predefined mapping relationship between a reference signal
port and a port group may be defined by using a function, or may be
regulated by using a predefined table, for example, as shown in
Table 2:
TABLE-US-00002 TABLE 2 Mapping between a port and a port group
Mapping between a port and a port group Index 0 1 2 3 0 0, 3, 8, 11
4, 7, 12, 15 1, 2, 9, 10 5, 6, 13, 14 1 0, 1, 12, 13 2, 3, 14, 15
4, 5, 8, 9 6, 7, 10, 11 2 0, 7, 8, 15 1, 6, 9, 14 2, 5, 10, 13 3,
4, 11, 12 3 0, 3, 12, 15 1, 2, 13, 14 4, 7, 8, 11 5, 6, 9, 10
[0257] It may be assumed that the antenna array B in FIG. 3 is the
first row in Table 2, that is, a mapping index value is 0, a port
group 0 includes reference signal ports (or antenna ports) 0, 3, 8,
and 11, a port group 1 includes reference signal ports (or antenna
ports) 4, 7, 12, and 15, a port group 2 includes reference signal
ports (or antenna ports) 1, 2, 9, and 10, and a port group 3
includes reference signal ports (or antenna ports) 5, 6, 13, and
14. When the mapping index value is 1 or 2 or 3, reference signal
ports included in each port group may be sequentially obtained by
analogy from the foregoing Table.
[0258] Optionally, as another embodiment, the reference signal port
configuration information may include a port group mapping double
index (m, n). In this case, the predefined mapping relationship
between a reference signal port and a port group may be defined by
using a function, or may be regulated by using a predefined table,
for example, as shown in Table 3:
TABLE-US-00003 TABLE 3 Mapping between a port and a port group
Double index Mapping between a port and a port group (m, n) 0 1 2 3
(2, 4) 0, 1, 4, 5 2, 3, 6, 7 -- -- (2, 8) 0, 3, 8, 11 4, 7, 12, 15
1, 2, 9, 10 6, 7, 10, 11 (4, 4) 0, 1, 12, 13 2, 3, 14, 15 4, 5, 8,
9 6, 7, 10, 11
[0259] Optionally, the double index (m, n) may indicate that a
quantity of reference signal ports is a product of m and n.
[0260] Further, combined coding may be performed on the double
index information. For example, combined coding of the double index
in Table 3 above is shown in Table 3a or 3b.
TABLE-US-00004 TABLE 3a Mapping between a port and a port group
Combined coding of a double Double index index Mapping between a
port and a port group (m, n) (m, n) 0 1 2 3 0 (2, 4) 0, 1, 4, 5 2,
3, 6, 7 -- -- 1 (2, 8) 0, 3, 4, 7, 1, 2, 6, 7, 8, 11 12, 15 9, 10
10, 11 2 (4, 4) 0, 1, 2, 3, 4, 5, 6, 7, 12, 13 14, 15 8, 9 10,
11
[0261] or
TABLE-US-00005 TABLE 3b Mapping between a port and a port group
Mapping Double index Mapping between a port and a port group index
(m, n) 0 1 2 3 0 (2, 4) 0, 1, 4, 5 2, 3, 6, 7 -- -- 1 (2, 8) 0, 3,
4, 7, 1, 2, 6, 7, 8, 11 12, 15 9, 10 10, 11 2 (4, 4) 0, 1, 2, 3, 4,
5, 6, 7, 12, 13 14, 15 8, 9 10, 11
[0262] Optionally, grouping of port groups may be that 4 reference
signal ports (or antenna ports) are used as one port group.
[0263] It should be further pointed out that grouping of port
groups may also be not limited to a port group including 4
reference signal ports, or may be a port group having 2 or 8 ports
or in another formation. In addition, a number of a reference
signal port included in each port group is also not limited to the
foregoing value, and may be flexibly selected according to an
actual antenna configuration or deployment. The foregoing
predefined port group mapping and mapping indication information
may enable a system to adapt to more antenna configurations and
antenna array deployments.
[0264] Optionally, the reference signal resource configuration
information may further include: any one of a reference signal
configuration and a reference signal subframe configuration. The
reference signal configuration may include: any one of a subcarrier
used by a reference signal port, an orthogonal frequency division
multiplexing (OFDM) symbol, and a code resource. The reference
signal subframe configuration may include: any one of a subframe
position occupied by a reference signal port, a subframe period,
and a subframe offset. It should be pointed out that the reference
signal configuration or the reference signal subframe configuration
may also be predefined, or is implicitly derived according to a
parameter, for example, a cell ID or a UE ID, that is known in
advance, and is known to both the base station and the UE, which is
not limited in this embodiment of the present disclosure.
[0265] Step 102: Obtain reference signal port information in at
least one port group according to the reference signal port
configuration information.
[0266] Step 103: Acquire signal quality measurement information
according to the reference signal port information in the at least
one port group.
[0267] Specifically, the reference signal or signal may
specifically include a cell-specific reference signal (CSR), or a
channel state information reference signal (CSI-RS), or a
demodulation reference signal (DMRS), but is not limited to current
examples.
[0268] The signal quality measurement information may be a
reference signal received power (RSRP) or a reference signal
received quality (RSRQ) or a reference signal strength indicator
(RSSI), or may also be other signal quality measurement information
defined based on a reference signal.
[0269] In this embodiment, an RSRP is used as an example and one
implementation is described in detail. This solution is not limited
to another implementation solution, and a solution of acquiring
other signal quality measurement information is also not
limited.
[0270] Optionally, the obtaining reference signal port information
in at least one port group according to the reference signal port
configuration information in step 102 may include:
[0271] obtaining reference signal port information in one specified
port group according to the reference signal port configuration
information; and
[0272] the acquiring signal quality measurement information
according to the reference signal port information in the at least
one port group in step 103 includes:
[0273] acquiring the signal quality measurement information
according to the reference signal port information in the one
specified port group.
[0274] For example, a mapping index in Table 2 is 0, and in this
case, reference signal ports included in a port group 0 are 0, 3,
8, and 11. Complex RSRP measurement of each antenna port may be
correlation between two adjacent reference signal resource elements
(RE). The two adjacent REs herein may refer to two adjacent REs in
a frequency domain, or two adjacent REs in a time domain, or two
adjacent REs in a time-frequency domain.
R S R P ( r , p ) = 1 K s - 1 m = 0 K s - 1 h ^ p ( m ) h ^ p ( m +
1 ) , p = 0 , 3 , 8 , 11 ( 1 ) ##EQU00007##
[0275] where h.sub.p (m) is a channel estimation on a reference
signal RE whose label number is m, K.sub.s is a total sample
quantity of usable reference signal REs in measurement bandwidth, p
is a number of a reference signal port in the one specified port
group, and r is an index of a receive antenna. An RSRP
corresponding to the antenna port group 0 may be obtained by
combining (combine) RSRP(r,p). Specifically, a reference signal
received power RSRP(r,p) of a pth port of an rth receive antenna is
obtained and the RSRP is obtained by combining RSRP(r,p). For
example, for RSRP(r,p) above, linear (correlated or uncorrelated)
averaging is performed on ports p and receive antennas, and then an
absolute value is taken, to obtain the RSRP corresponding to the
port group 0. Alternatively, for RSRP(r,p) above, linear
(correlated or uncorrelated) averaging is performed on one port p
and receive antennas, and then an absolute value is taken, to
obtain the RSRP corresponding to the port group 0. By means of
sequential analogy, the RSRP may also be obtained by using
reference signals of another port group.
[0276] In step 103 in this embodiment, the port group used for
obtaining an RSRP and a port in the port group may be predefined
(for example, the port group 0, and the port 0 in the port group 0,
or the ports 0 and 3 in the port group 0, or all the ports in the
port group 0, or others) or notified by a base station eNB by using
higher layer signaling such as RRC signaling or by using downlink
control information. In the foregoing, an RSRP is obtained based on
one port group or some or all ports in one port group, and RSRPs do
not need to be measured port by port, so that implementation
complexity in measuring an RSRP by UE can be reduced; at the same
time, a port group is predefined or notified, so that the UE and
the eNB have consistent understanding of measurement, thereby
ensuring consistency in measurement of RSRPs. At the same time, for
different port groups, powers of the port groups may be
independently indicated, and full use of antenna configurations and
antenna array structures shown in FIG. 3 and FIG. 4 is made, so as
to adapt to changes in an antenna structure to perform flexible
indication, thereby ensuring that the base station eNB can adapt to
multiple antenna configurations and antenna arrays.
[0277] Optionally, reference signal power information, of one or
more port groups, included in the reference signal resource
configuration information received by the UE in step 101 is used
for indicating a reference signal power of ports in a corresponding
port group.
[0278] 16 reference signal ports are used as an example, and
reference signal powers of 4 port groups may be shown in Table
4:
TABLE-US-00006 TABLE 4 Table of reference signal powers of port
groups Port group number 0 1 2 3 Reference signal p0 p1 p2 p3
power
[0279] In this case, a power of a reference signal port included in
a port group 0 is p0, and powers of reference signal ports included
in port groups 1, 2, and 3 may be sequentially obtained by analogy,
which are respectively p1, p2, and p3.
[0280] Alternatively, reference signal power information of the
foregoing one or more port groups may also be jointly represented
by using a reference signal power of one port group (for example,
the port group 0) among the one or more port groups and a ratio of
a reference signal power of another port group (for example, the
port group 1) to the reference signal power of the port group (for
example, the port group 0) or ratios of reference signal powers of
multiple port groups (for example, the port groups 1, 2, and 3) to
the reference signal power of the port group (for example, the port
group 0). For example, the reference signal power of the port group
0 is p0, the ratios of the reference signal powers of the port
groups 1, 2, and 3 to the reference signal power of the port group
0 are respectively .rho.1, .rho.2, and .rho.3. In this case, the UE
may obtain that the reference signal powers of the port groups 1,
2, and 3 are respectively p0*.rho.1, p0*.rho.2, and p0*.rho.3.
[0281] In addition, reference signal power information of the one
or more port groups may also be represented by using a reference
signal power of one port group (for example, the port group 0)
among the one or more port groups and a differential between a
reference signal power of another port group (for example, the port
group 1) and the reference signal power of the port group (for
example, the port group 0) or differentials between reference
signal powers of multiple port groups (for example, the port groups
1, 2, and 3) and the reference signal power of the port group (for
example, the port group 0). For example, the reference signal power
of the port group 0 is p0, the differentials between the reference
signal powers of the port groups 1, 2, and 3 and the reference
signal power of the port group 0 are respectively d1, d2, and d3.
In this case, the UE may obtain that the reference signal powers of
the port groups 1, 2, and 3 are respectively p0+d1, p0+d2, and
p0+d3.
[0282] It is used above that reference signal power information is
separately indicated for port groups, and it can be avoided that
reference signal powers are indicated port by port, so as to reduce
a signaling overhead; further, a uniform power indicator is used
for ports in a port group, and for different port groups, different
port groups powers may be independently indicated, so that full use
of an antenna configuration or an antenna array structure is made,
thereby enabling a system to flexibly select a reference signal
power according to the antenna configuration or the antenna array
structure. In addition, it should be further pointed that that
grouping of port groups is not limited to a port group including 4
reference signal ports, and the grouping of port groups and the
formation of the ports in Tables 1, 2, and 3 above may further
enable the antenna arrays in FIG. 3 or FIG. 4 to have powers
symmetric about array structures, that is, the ports may have
symmetric weights relative to the array, and by means of the
symmetry of the weights, design complexity in beamforming or side
lobe suppression can be reduced.
[0283] Further, the reference signal power above may also be
represented by using an energy per resource element (EPRE).
[0284] Optionally, reference signal power information of at least
two port groups includes:
[0285] a reference signal power of a first port group, and a ratio
of a reference signal power of each port group among the rest port
groups to the reference signal power of the first port group;
or
[0286] a reference signal power of a first port group, and a
differential between a reference signal power of each port group
among the rest port groups and the reference signal power of the
first port group.
[0287] Optionally, the foregoing acquiring the signal quality
measurement information according to the reference signal port
configuration information and in combination with the reference
signal power information of the at least two port groups
includes:
[0288] obtaining, according to the reference signal port
configuration information, signal quality measurement information
corresponding to the at least two port groups; and
[0289] performing, according to the reference signal power
information of the at least two port groups, weighted averaging on
the obtained signal quality measurement information corresponding
to the at least two port groups in accordance with a port group
power, to obtain the signal quality measurement information.
[0290] Specifically, the signal quality measurement information may
be obtained by combining reference signal received powers of more
than one port group.
[0291] For example, there are 4 port groups in total: port groups
0, 1, 2, and 3. Based on the foregoing method for obtaining an RSRP
of one port group, reference signal received powers RSRP.sub.g
corresponding to the port groups 0, 1, 2, and 3 may be separately
obtained, where g=0, 1, 2, 3. The reference signal resource
configuration information received according to step 101 further
includes: reference signal power information of at least two port
groups that is used by the user equipment to acquire the signal
quality measurement information according to the reference signal
port configuration information and in combination with the
reference signal power information of the at least two port
groups.
[0292] The performing, according to the reference signal power
information of the at least two port groups, weighted averaging on
the obtained signal quality measurement information corresponding
to the at least two port groups in accordance with a port group
power, to obtain the signal quality measurement information
includes:
[0293] according to a formula
S Q = ( g = 0 n - 1 p g S Q g ) / ( g = 0 n - 1 p g ) ( 2 )
##EQU00008##
[0294] obtaining the signal quality measurement information,
where
[0295] SQ.sub.g is signal quality measurement information of a
specified port group, g is a sequence number of a specified port
group, n is a quantity of specified port groups, n.gtoreq.2, and
p.sub.g is a reference signal power of a specified port group,
where the reference signal power of the specified port group is
obtained according to the reference signal power information of the
at least two port groups.
[0296] The multiple port groups above may be all port groups, or
may be some port groups. Therefore, preset port information may be
information about all port groups, or may be information about some
port groups. The some port groups may be agreed in advance (for
example, the port group 0 and the port group 1) or notified by the
base station eNB by using higher layer signaling such as RRC
signaling or by using downlink control information. In the
foregoing, RSRPs of the multiple port groups are obtained, and
processing such as smoothing or filtering may be performed on the
RSRP obtained for each port group, so as to further increase
precision of measuring an RSRP; at the same time, it is avoided
that the UE performs calculation port by port, thereby lowering
implementation complexity. In addition, a configuration of a port
group can ensure that the base station eNB can adapt to multiple
antenna configurations and antenna arrays.
[0297] Likewise, a similar method is used. Based on the reference
signal port configuration information in the reference signal
resource configuration information and a reference signal
configuration or a subframe configuration, a reference signal sent
by the base station is received, and the UE may further obtain
signal quality measurement information, such as a reference signal
received quality (RSRQ) or a reference signal strength indicator
(RSSI), of one or more port groups. The RSSI is a received total
wideband power, including a power of interference and a power of
thermal noise, and the RSRQ is a ratio of an RSRP to the RSSI.
[0298] Further, the method for measuring communication quality may
further include:
[0299] Step 104: The UE reports, to a base station eNB, the channel
quality measurement information, for example, an RSRP, so as to
help implement cell selection or cell handover.
[0300] Optionally, when the signal quality measurement information
is the reference signal received power RSRP, the method for
measuring communication quality may further include:
[0301] Step 105: Receive filter coefficient information sent by the
base station.
[0302] Step 106: Perform, based on the filter coefficient
information, filtering on the reference signal received power RSRP,
and obtain a path loss estimation value.
[0303] Specifically, the user equipment may receive filter
coefficient information sent by the base station at the same time
when the reference signal resource configuration information is
received in step 101, for example, the filter coefficient
information and the reference signal resource configuration
information are received in a same subframe. The filter coefficient
information sent by the base station may also be received before or
after the reference signal resource configuration information is
received in step 101. The filter coefficient information and the
reference signal resource configuration information may be received
in an information element (IE) of same or different higher layer
signaling such as RRC signaling, or same or different downlink
control information (DCI).
[0304] Specifically, for the method in step 103, a reference signal
received power of one or more port groups may be obtained, for
example, reference signal received powers RSRP.sub.g corresponding
to port groups 0, 1, 2, and 3 may be obtained, where g=0, 1, 2,
3.
[0305] The path loss estimation may be obtained based on a
reference signal received power of one port group and a
corresponding reference signal power:
PL(g)=a reference signal power of a port group g-a higher layer
filtered RSRP of the port group g.
[0306] where PL(g) represents the PL estimation obtained based on
the port group g, where a higher layer filtering parameter is
notified by using higher layer signaling. A PL estimation may be
obtained by using a PL of one port group, for example, the port
group 0. The higher layer filtered RSRP of the port group g is
obtained by performing filtering on the RSRP of the port group g by
using the higher layer filter parameter notified by using the
higher layer signaling.
[0307] The foregoing port group for obtaining a PL estimation may
be predefined (for example, the port group 0) or notified by the
base station eNB by using higher layer signaling such as RRC
signaling or by using downlink control information. A PL estimation
is obtained above based on one port group, which can reduce
implementation complexity of PL estimation by UE, and ensure
consistency of PL estimation. In addition, a configuration of a
port group can ensure that the base station eNB can adapt to
multiple antenna configurations and antenna arrays.
[0308] The path loss estimation may also be obtained based on
reference signal received powers of multiple port groups and
corresponding reference signal powers. Specifically, the PL
estimation may be a linear average of PL estimations obtained for
the multiple port groups.
[0309] The multiple port groups above may be all port groups, or
may be some port groups. The some port groups may be agreed in
advance (for example, the port group 0 and the port group 1) or
notified by the base station eNB by using higher layer signaling
such as RRC signaling or by using downlink control information. In
the foregoing, PL estimations are obtained for multiple port
groups, which can further increase precision of PL estimation, and
avoid excessively high complexity of implementation by UE. In
addition, a configuration of a port group can ensure that the base
station eNB can adapt to multiple antenna configurations and
antenna arrays.
[0310] Further, the method for measuring communication quality may
further include:
[0311] Step 107: Send an uplink physical channel or an uplink
physical signal to the base station, where a transmit power of the
uplink physical channel or the uplink physical signal is obtained
by means of calculation according to the path loss estimation
value.
[0312] The physical channel may be a physical uplink control
channel PUCCH, a physical uplink shared channel PUSCH, or the like.
The physical signal may be a sounding reference signal (SRS) or a
demodulation reference signal (DMRS) that is used for the uplink
physical channel.
[0313] Specifically, according to the foregoing obtained path loss
estimation, a setting of the transmit power of the physical uplink
control channel PUCCH may be defined as the following formula
(3):
P.sub.PUCCH(i)=min{P.sub.CMAX,c(i),P.sub.O.sub._.sub.PUCCH+h(n.sub.CQI,n-
.sub.HARQ,n.sub.SR)+.DELTA..sub.F.sub._.sub.PUCCH(F)+.DELTA..sub.TxD(F')+g-
(i)}
where P.sub.CMAX,c(i) is a maximum transmit power configured on UE
in a subframe i of a serving cell c, and P.sub.O.sub._.sub.PUCCH is
a parameter formed by the sum of a cell-specific parameter
P.sub.).sub._.sub.NOMINAL.sub._.sub.PUCCH provided by a higher
layer and a UE specific parameter
P.sub.O.sub._.sub.UE.sub._.sub.PUCCH.
h(n.sub.CQI,n.sub.HARQ,n.sub.SR) is a value dependent on a PUCCH
format, where n.sub.CQI corresponds to a quantity of information
bits of a CQI. For the parameter n.sub.SR, n.sub.SR=1 if subframe i
is configured for SR for the UE not having any associated transport
block for UL-SCH, or otherwise n.sub.SR=0. The parameter n.sub.HARQ
is a quantity of HARQ-ACK bits sent in the subframe i. The
parameter .DELTA..sub.F.sub._.sub.PUCCH(F) is provided by a higher
layer, and a value of each .DELTA..sub.F.sub._.sub.PUCCH(F)
corresponds to a PUCCH format (F). For the parameter
.DELTA..sub.TxD(F'), if the UE is configured by a higher layer to
transmit a PUCCH on two antenna ports, a value of
.DELTA..sub.TxD(F') is provided by a higher layer, where each PUCCH
format F' is predefined; otherwise, .DELTA..sub.TxD(F')=0. g(i) is
a current PUCCH power control state of the UE. PL.sub.c is an
estimation value, of a path loss, obtained for the cell C by the UE
by using the method in step 104.
[0314] For another example, according to the foregoing obtained
path loss estimation, a setting of the transmit power of the
physical uplink shared channel PUSCH may be defined as the
following formula (4):
P.sub.PUSCH,c(i)=min{P.sub.CMAX,c(i),10
log.sub.10(M.sub.PUSCH,c(i))+P.sub.PUSCH,c(j).alpha..sub.c(j)PL.sub.c+.DE-
LTA..sub.TF,c(i)+f.sub.c(i)}
where P.sub.CMAX,c(i) is a maximum transmit power configured on UE
in a subframe i of a serving cell c; M.sub.PUSCH,c(i) is the
bandwidth of the PUSCH resource assignment expressed in number of
resource blocks valid for subframe i and serving cell c.
P.sub.O.sub._.sub.PUSCH,c(j) is a parameter formed by a component
P.sub.O.sub._.sub.NOMINAL.sub._.sub.PUSCH,c(j) and a component
P.sub.O.sub._.sub.UE.sub._.sub.PUSCH,c(j) that are provided by a
higher layer, where j=0, 1. .alpha..sub.c.di-elect cons.{0, 0.4,
0.5, 0.6, 0.7, 0.8, 0.9, 1} is a 3-bit parameter, and is provided
by a higher layer. .DELTA..sub.TF,c(i) is a parameter that is
determined by using higher layer signaling and related to a
transmission format. f.sub.c(i) is a current PUSCH power control
adjustment state of the UE. PL.sub.c is an estimation value, of a
path loss, obtained for the cell C by the UE by using the method in
step 104.
[0315] For still another example, according to the foregoing
obtained path loss estimation, a setting of a transmit power of a
sounding reference signal SRS may be defined as the following
formula:
P.sub.SRS,c(i)=min{P.sub.CMAX,c(i),P.sub.SRS.sub._.sub.OFFSET,c(m)+10
log.sub.10(M.sub.SRS,c)+P.sub.O.sub._.sub.PUSCH,c(j)+.alpha..sub.c(j)PL.s-
ub.c+f.sub.c(i)}
where P.sub.SRS.sub._.sub.OFFSET,c(m) is a parameter
semi-statically configured by a higher layer for a serving cell c,
where m=0 and m=1. For SRS transmission, if a trigger type is 0,
m=0; if a trigger type 1, m=1. M.sub.SRS,c is bandwidth of SRS
transmission of a subframe i of the serving cell c. f.sub.c(i) is a
current PUSCH power control adjustment state of the serving cell C.
P.sub.O.sub._.sub.PUSCH,c(j) and .alpha..sub.c(j) are predefined
parameters, for example, it is defined in Section 5.1.1.1 in LTE
36.213 that j=1. PL.sub.c is an estimation value, of a path loss,
obtained for the cell C by the UE by using the method in step
104.
[0316] The above path loss estimation is used for open-loop control
of an uplink channel, which can further improve reliability of
power control, and ensure that the base station eNB can adapt to
multiple antenna configurations and antenna arrays.
Embodiment 3
[0317] This embodiment of the present disclosure provides a method
for measuring communication quality. As shown in FIG. 5, the method
includes:
[0318] Step S21: Determine reference signal resource configuration
information, and send the reference signal resource configuration
information to user equipment, where the reference signal resource
configuration information includes: reference signal port
configuration information and power ratio information, where the
reference signal port configuration information is used for
indicating a mapping between the reference signal port and a port
group, and the power ratio information is used for indicating a
power ratio of a data channel of at least one port group to a
reference signal.
[0319] When the reference signal resource configuration information
includes: the reference signal port configuration information and
the power ratio information, the reference signal resource
configuration information is sent to the user equipment (UE), so
that the user equipment acquires channel state information CSI
according to the reference signal resource configuration
information. Because reference signal ports are allocated to
multiple groups, the UE may perform processing according to
reference signal quality, of one port group or multiple port
groups, in the reference signal resource configuration information
to obtain final signal quality measurement information, so that a
UE side can distinguish ports according to different port groups,
which differs from a case in which transmit powers of different
ports cannot be distinguished in the prior art. Therefore, channel
state information acquired in the solution may enable the UE to
perform more accurate modulation and coding scheme (MCS) selection
or scheduling, thereby increasing a throughput of a system.
[0320] Step S22: Receive channel state information (CSI) sent by
the user equipment, where the CSI is obtained by the user equipment
according to the reference signal port configuration information
and the power ratio information.
[0321] The channel state information CSI includes: any one or any
combination of a channel quality indicator (CQI), a precoding
matrix indicator (PMI), and a rank indicator (RI).
[0322] According to the method described in Embodiment 3 above, in
the method, reference signal resource configuration information is
determined on a network side, and the reference signal resource
configuration information is sent to a user side, where the
reference signal resource configuration information at least
includes: reference signal power related information of a port
group, and reference signal port configuration information, where
the reference signal port configuration information is used for
indicating a mapping between the reference signal port and a port
group. In the method, it can be avoided that reference signal power
related information is indicated port by port, so as to reduce a
signaling overhead; further, a uniform power indicator is used for
ports in a port group, and for different port groups, power related
information of the port groups may be indicated independently, so
that full use of an antenna configuration or an antenna array
structure is made, thereby enabling a system to flexibly select
reference signal power related information according to the antenna
configuration or the antenna array structure; because an antenna
array may have symmetric weights, by means of the symmetry of the
weights, design complexity in beamforming or side lobe suppression
can be reduced.
[0323] Further, the reference signal resource configuration
information is sent to UE on the user side, and the UE may perform
processing according to reference signal quality, of one port group
or multiple port groups, in the reference signal resource
configuration information to obtain final signal quality
measurement information, so that a UE side can distinguish ports
according to different port groups, which differs from a case in
which transmit powers of different ports cannot be distinguished in
the prior art. The UE is enabled to acquire channel state
information, so that the UE can perform more accurate modulation
and coding scheme (MCS) selection or scheduling, thereby increasing
a throughput of a system.
[0324] Optionally, the reference signal port configuration
information is a single index, or is a double index, or is an index
after combined coding. Refer to Embodiment 1 for the detailed
description, which is no longer repeated herein.
[0325] Optionally, in step S21, in the power ratio information:
[0326] power ratios of data channels on antenna ports in each port
group among the at least one port group to a reference signal are
the same; or
[0327] power ratios of data channels on ports in one port group
among the at least one port group and data channels on ports in
another port group to a reference signal are the same.
[0328] Optionally, the power ratio information is used for
indicating multiple sets of power ratios of data channels of the at
least one port group to a reference signal; and
[0329] the receiving CSI sent by the user equipment includes:
receiving multiple sets of CSI that are sent by the user equipment,
where each set of CSI is obtained by the user equipment according
to one set of power ratios among the multiple sets of power
ratios.
[0330] The "multiple sets" in this embodiment refers to use of
multiple sets of values. For the multiple sets of values, multiple
sets of signaling having a same format may be used. For
example,
[0331] a signaling format is: power ratios of data channels on
ports in at least one port group to a reference signal are the
same, that is, powers of ports in a port group are the same;
and
[0332] another signaling format is: power ratios of data channels
on ports in one port group and data channels on ports in another
port group to a reference signal are the same; however, powers of
ports in a port group are different.
[0333] Two different signaling formats are listed as examples in
the foregoing, and they may be understood as specific examples of
this embodiment, and should not be construed as limitations to this
embodiment.
Embodiment 4
[0334] This embodiment of the present disclosure provides a method
for measuring communication quality. The method is similar to
Embodiment 2 above, and a difference lies in that, after receiving
reference signal resource configuration information sent by a
network side, UE on a user side uses the information to acquire
channel state information, so that the UE can perform corresponding
modulation and coding scheme MCS selection or resource scheduling
according to the channel state information.
[0335] As shown in FIG. 6, the method includes:
[0336] Step 201: Receive reference signal resource configuration
information sent by a base station, where the reference signal
resource configuration information includes: reference signal port
configuration information and power ratio information, where the
reference signal port configuration information is used for
indicating a mapping between the reference signal port and a port
group, and the power ratio information is used for indicating a
power ratio of a data channel of at least one port group to a
reference signal.
[0337] For detailed description of the reference signal port
configuration information included in the reference signal resource
configuration information, reference may be made to the description
of the reference signal port configuration information in step 101.
That is, the reference signal port configuration information is
used for indicating the mapping between a reference signal port and
a port group, and the mapping relationship between a reference
signal port and a port group is predefined.
[0338] The data channel may be a physical downlink shared channel
(PDSCH), or may be a channel used for transmitting control
information. A power of a data channel may be an energy per
resource element (EPRE).
[0339] Specifically, the UE receives a reference signal resource
configuration, which may be that the UE receives, by using higher
layer signaling such as radio resource control (RRC) signaling or
dynamic signaling such as downlink control information (DCI), the
reference signal resource configuration notified by an eNB, or
obtains, based on a cell identity (ID), the reference signal
resource configuration.
[0340] Specifically, the reference signal port configuration
information is used for indicating the mapping between the
reference signal port and a port group.
[0341] One reference signal port usually corresponds to one
physical antenna or one virtual antenna, where the virtual antenna
may be obtained by means of weighted combination of multiple
physical antennas. An actual antenna deployment may have a
different antenna configuration and an antenna array form. It
should be pointed out that, in this embodiment, a reference signal
port and a reference signal port group may be interchangeable with
an antenna port and an antenna port group.
[0342] Optionally, the reference signal port configuration
information is used for indicating the mapping relationship between
the reference signal port and a port group, and may include a
quantity of reference signal ports and a mapping index, where the
mapping index is used for indicating a mapping between a reference
signal port group and a corresponding port. 8-antenna arrays
represented by an antenna array A shown in FIG. 3 and an antenna
array A shown in FIG. 4 are used as examples, and the reference
signal port configuration information includes: a quantity of
reference signal ports is 8 and a mapping index is 0 or 1. The
predefined mapping relationship between a reference signal port and
a port group may be defined by using a function, or may be
regulated by using a predefined table, as shown in Table 1.
[0343] 16-antenna arrays represented by an antenna array B or an
antenna array C shown in FIG. 3 and an antenna array B or an
antenna array C shown in FIG. 4 are used as examples, and the
reference signal port configuration information includes: a
quantity of reference signal ports is 16 and a mapping index is 0
or 1 or 2 or 3. The predefined mapping relationship between a
reference signal port and a port group may be defined by using a
function, or may be regulated by using a predefined table, as shown
in Table 2.
[0344] Specifically, the reference signal port configuration
information may include a double index (m, n). In this case, the
predefined mapping relationship between a reference signal port and
a port group may be defined by using a function, or may be
regulated by using a predefined table, as shown in Table 3.
[0345] Further, the double index (m, n) may indicate that a
quantity of reference signal ports is a product of m and n.
[0346] Further, for the double index information, combined coding
may be performed, for example, combined coding of the double index
in Table 3 above is shown in Table 3a or 3b.
[0347] Optionally, grouping of port groups may be that 4 reference
signal ports/antenna ports form one port group.
[0348] It should be further pointed out that grouping of port
groups is not limited to a port group including 4 reference signal
ports, or may be a port group having 2 or 8 ports or in another
formation. In addition, a number of a reference signal port
included in each port group is also not limited to the foregoing
value, and may be flexibly selected according to an actual antenna
configuration or deployment. The foregoing predefined port group
mapping and mapping indication information may enable a system to
adapt to more antenna configurations and antenna array
deployments.
[0349] In the power ratio information in step 201, power ratios of
data channels on antenna ports in each port group among the at
least one port group to a reference signal are the same. 16
reference signal ports are used as an example, and it is assumed
that a data channel is a PDSCH, and a power corresponds to an EPRE,
so that a signal power ratio of a 4-port group may be:
TABLE-US-00007 TABLE 4 Power ratio Port group number 0 1 2 3 A
ratio of an EPRE of a PDSCH to .rho.0 .rho.1 .rho.2 .rho.3 an EPRE
of a reference signal
[0350] Further, power ratios of data channels on each antenna port
in the at least one port group to a reference signal are equal.
Table 4 is used as an example, where power ratios of data channels
on ports in a port group 0 to a reference signal may be equal.
[0351] Optionally, as another embodiment, in the power ratio
information in step 201, power ratios of data channels on ports in
one port group among the at least one port group and data channels
on ports in another port group to a reference signal are the
same.
[0352] Specifically, a port group having 4 ports is used as an
example. For example, ports of a port group 0 are 0, 1, 4, and 5,
and ports of a port group 1 are 2, 3, 6, and 7. Power ratios of
data channels in the port group 0 to a reference signal are shown
in Table 4a.
TABLE-US-00008 TABLE 4a Power ratio of a port group 0 Port number 0
1 4 5 A ratio of an EPRE of a PDSCH .rho.0 .rho.1 .rho.2 .rho.3 to
an EPRE of a reference signal
[0353] The power ratios of data channels, corresponding to the
ports in the port group 0 and the ports in the port group 1, to a
reference signal are the same; that is, power ratios of data
channels, corresponding to the ports 2, 3, 6, and 7 in the port
group 1, to a reference signal are respectively .rho.0, .rho.1,
.rho.2, and .rho.3.
[0354] Optionally, as another embodiment, the power ratio of the
data channel in the one or more port groups to the reference signal
in step 201 may include multiple sets of values. The sets of values
may be values shown in Table 4 or 4a.
[0355] In addition, the reference signal resource configuration
information may further include: any one of a reference signal
configuration and a reference signal subframe configuration. The
reference signal configuration may include a subcarrier used by a
reference signal port or an OFDM symbol or a code resource. The
reference signal subframe configuration may include a subframe
position occupied by a reference signal port, a subframe period or
a subframe offset. It should be pointed out that the reference
signal configuration or the reference signal subframe configuration
may also be predefined, or is implicitly derived according to a
parameter, for example, a cell ID or a UE ID, that is known in
advance, and is known to both the base station and the UE, which is
not limited in this embodiment of the present disclosure.
[0356] Step 202: Obtain a power ratio of a data channel on each
antenna port in the at least one port group to a reference signal
according to the reference signal port configuration information
and the power ratio information.
[0357] Step 203: Obtain channel state information CSI according to
the power ratio of the data channel on each antenna port to the
reference signal.
[0358] Specifically, the obtaining channel state information CSI
according to the power ratio of the data channel on each antenna
port to the reference signal may include:
[0359] obtaining, according to the reference signal on each antenna
port, a channel measurement value corresponding to each antenna
port;
[0360] obtaining a channel estimation value of the data channel on
each antenna port according to the channel measurement value
corresponding to each antenna port and the power ratio of the data
channel on each antenna port to the reference signal; and
[0361] obtaining the channel state information CSI according to the
channel estimation value of the data channel on each antenna
port.
[0362] It should be pointed out that the present disclosure does
not limit an execution sequence of obtaining a channel measurement
value corresponding to each reference signal port in the at least
one port group and obtaining a power ratio of a data channel,
corresponding to each antenna port in the at least one port group,
to a reference signal.
[0363] Specifically, the reference signal may specifically include
a cell-specific reference signal (CSR), or a received channel state
information reference signal (CSI-RS), or a demodulation reference
signal (DMRS).
[0364] The channel state information (CSI) may be a channel quality
indicator (CQI) or a precoding matrix indicator (PMI) or a rank
indicator (RI); or may be other channel state information such as a
precoding type indicator (PTI).
[0365] Specifically, when calculating channel state information
based on a ratio of an EPRE of a PDSCH signal to an EPRE of a
CSI-RS, the UE obtains a transmit power of a corresponding PDSCH on
an antenna port.
[0366] Sixteen (16) reference signal ports are used as an example,
and it is assumed that the reference signal port configuration
information notified in step 201 includes: a quantity of reference
signal ports is 16 and a mapping index is 1; a mapping relationship
is shown in Table 2, and power ratios are shown in Table 4. It can
be known according to Table 2 and Table 4 that:
[0367] EPRE or power ratios of PDSCHs, corresponding to reference
signal ports 0, 1, 12, and 13, to a reference signal are
.rho.0;
[0368] EPRE or power ratios of PDSCHs, corresponding to reference
signal ports 2, 3, 14, and 15, to a reference signal are
.rho.1;
[0369] EPRE or power ratios of PDSCHs, corresponding to reference
signal ports 4, 5, 8, and 9, to a reference signal are .rho.2;
and
[0370] EPRE or power ratios of PDSCHs, corresponding to reference
signal ports 6, 7, 10, and 11, to a reference signal are
.rho.3.
[0371] It should be noted that the reference signal ports
correspond to the antenna ports on a one-to-one basis.
[0372] In addition, the UE receives a reference signal according to
the reference signal resource configuration information, and a
channel measurement value corresponding to each antenna port may be
obtained as follows:
H=[h.sub.0 h.sub.1 . . . h.sub.15]
where h.sub.p, p=0, . . . , 15 is a channel measurement value
corresponding to an antenna port p, and the measurement value may
be obtained based on a manner such as the least square method
according to a specific reference signal such as a CSI RS, which is
the prior art and is not further elaborated.
[0373] According to the foregoing channel measurement value
corresponding to each antenna port, the UE may obtain a channel
measurement value or channel estimation value of a data channel
PDSCH on each antenna port according to an EPRE or power ratio of
the PDSCH to a reference signal, as follows:
H=[h.sub.0 h.sub.1 . . . h.sub.15]
[0374] where a channel measurement value or channel estimation
value h.sub.p of a data channel PDSCH on the antenna port p is:
h.sub.p= {square root over (.rho..sub.p)}h.sub.p
[0375] where p is an index of the antenna port, .rho..sub.p is a
power ratio of the data channel on the antenna port p to a
reference signal, h.sub.p is a channel measurement value
corresponding to the antenna port p, and h.sub.p is a channel
estimation value of the data channel on the antenna port p; that
is,
h ^ p = { .rho. 0 h p , p = 0 , 1 , 12 , 13 .rho. 1 h p , p = 2 , 3
, 14 , 15 .rho. 2 h p , p = 4 , 5 , 8 , 9 .rho. 3 h p , p = 6 , 7 ,
10 , 11 ##EQU00009##
[0376] the UE may calculate channel state information CSI based on
the following equation (5):
y=HPs+n (5)
[0377] where P is a precoding matrix, and for a non-precoding
system, P is a unit array; S is a sent information symbol, for
example, a modulation symbol; n is interference and noise vectors;
and y is a received signal.
[0378] The channel state information, for example, any one or any
combination of a channel quality indicator (CQI) or a precoding
matrix indicator (PMI)/a rank indicator (RI) is obtained according
to the equation (5) above. A specific process of obtaining channel
state information, for example, a CQI or a PMI or an RI according
to the equation (5) above is the prior art, which is no longer
further elaborated herein.
[0379] Optionally, as another embodiment, the power ratio
information is used for indicating multiple sets of power ratios of
data channels of the at least one port group to a reference
signal.
[0380] 16 reference signal ports are used as an example, and it is
assumed that the reference signal port configuration information
notified in step 201 includes: a quantity of reference signal ports
is 16 and a mapping index is 1; a mapping relationship is shown in
Table 2, and power ratios are shown in Table 4b. It can be known
according to Table 2 and Table 4b that:
[0381] EPRE ratios or a first set of power ratios of PDSCHs,
corresponding to reference signal ports 0, 1, 12, and 13, to a
reference signal are x0;
[0382] EPRE ratios or a first set of power ratios of PDSCHs,
corresponding to reference signal ports 2, 3, 14, and 15, to a
reference signal are x1;
[0383] EPRE ratios or a first set of power ratios of PDSCHs,
corresponding to reference signal ports 4, 5, 8, and 9, to a
reference signal are x2;
[0384] EPRE ratios or a first set of power ratios of PDSCHs,
corresponding to reference signal ports 6, 7, 10, and 11, to a
reference signal are x3;
[0385] EPRE ratios or a second set of power ratios of PDSCHs,
corresponding to reference signal ports 0, 1, 12, and 13, to a
reference signal are y0;
[0386] EPRE ratios or a second set of power ratios of PDSCHs,
corresponding to reference signal ports 2, 3, 14, and 15, to a
reference signal are y1;
[0387] EPRE ratios or a second set of power ratios of PDSCHs,
corresponding to reference signal ports 4, 5, 8, and 9, to a
reference signal are y2; and
[0388] EPRE ratios or a second set of power ratios of PDSCHs,
corresponding to reference signal ports 6, 7, 10, and 11, to a
reference signal are y3.
TABLE-US-00009 TABLE 4b Multiple sets of power ratios of a port
group 0 Port number 0 1 4 5 A first ratio of an EPRE of a PDSCH to
x0 x1 x2 x3 an EPRE of a reference signal A second ratio of an EPRE
of a PDSCH y0 y1 y2 y3 to an EPRE of a reference signal
[0389] Step 204: Send the channel state information CSI to the base
station.
[0390] Specifically, the channel state information may be sent to
the base station by using a physical uplink control channel PUCCH
or a physical uplink shared channel PUSCH.
[0391] Optionally, the sending the channel state information CSI to
the base station includes: sending multiple sets of channel state
information CSI to the base station, where each set of channel
state information CSI is obtained according to one set of power
ratios among the multiple sets of power ratios.
[0392] 16 reference signal ports are used as an example, and it is
assumed that the reference signal port configuration information
notified in step 201 includes: a quantity of reference signal ports
is 16 and a mapping index is 1; a mapping relationship is shown in
Table 2, and power ratios are shown in Table 4b. It can be known
according to Table 2 and Table 4b that UE sends two sets of channel
state information CSI to the base station. The first set of CSI is
calculated according to a first set of power ratios in Table 4c
below:
TABLE-US-00010 TABLE 4c First set of power ratios of a port group 0
Port number 0 1 4 5 A ratio of an EPRE of a PDSCH x0 x1 x2 x3 to an
EPRE of a reference signal
[0393] The second set of CSI is calculated according to a second
set of power ratios in Table 4d:
TABLE-US-00011 TABLE 4d Second set of power ratios of a port group
0 Port number 0 1 4 5 A ratio of an EPRE of a PDSCH y0 y1 y2 y3 to
an EPRE of a reference signal
[0394] In the foregoing, a port group is used to separately
indicate a ratio of a power of a data channel to a power of a
reference signal, which can reduce a signaling overhead and enable
a system to flexibly configure a signal power according to an
antenna configuration or an antenna array structure. In addition,
it should be further pointed out that although grouping of a port
group is not limited to a port group including 4 reference signal
ports, grouping of port groups and formation of ports in Tables 1,
2, and 3 above may further enable the antenna arrays in FIG. 3 or
FIG. 4 to have powers symmetric about array structures, that is,
the ports may have symmetric weights relative to the array, so as
to implement beamforming or side lobe suppression.
Embodiment 5
[0395] This embodiment of the present disclosure provides a network
side apparatus. As shown in FIG. 7, the apparatus includes: a
determining unit 601 and a first sending unit 602.
[0396] The determining unit 601 is configured to determine
reference signal resource configuration information, where the
reference signal resource configuration information includes
reference signal port configuration information, where the
reference signal port configuration information is used for
indicating a mapping relationship between a reference signal port
and a port group.
[0397] The first sending unit 602 is configured to send, to user
equipment, the reference signal resource configuration information
determined by the determining unit 601, so that the user equipment
acquires signal quality measurement information according to the
reference signal port configuration information.
[0398] The network side apparatus described in this embodiment may
be a base station on a network side, and reference may be made to
the description of the corresponding steps in Embodiment 1 for
implementation of functions of units of the network side apparatus,
which is no longer repeated herein.
[0399] In the apparatus described in Embodiment 5 above, reference
signal resource configuration information is determined on a
network side, and the reference signal resource configuration
information is sent to a user side, where the reference signal
resource configuration information includes reference signal port
configuration information, where the reference signal port
configuration information is used for indicating a mapping
relationship between a reference signal port and a port group. The
apparatus can avoid that reference signal power related information
is indicated port by port, so as to reduce a signaling overhead;
further, a uniform power indicator is used for ports in a port
group, and for different port groups, power related information of
the port groups may be indicated independently, so that full use of
an antenna configuration or an antenna array structure is made,
thereby enabling a system to flexibly select reference signal power
related information according to the antenna configuration or the
antenna array structure; because an antenna array may have
symmetric weights, by means of the symmetry of the weights, design
complexity in beamforming or side lobe suppression can be
reduced.
[0400] Further, the reference signal resource configuration
information is sent to UE on the user side, and the UE may perform
processing according to reference signal quality, of at least one
port group, in the reference signal resource configuration
information to obtain final signal quality measurement information,
so that a UE side can distinguish ports according to different port
groups, which differs from a case in which transmit powers of
different ports cannot be distinguished in the prior art. The UE is
enabled to acquire signal quality measurement information, so that
the UE can perform more accurate cell selection and uplink power
control.
[0401] Optionally, the reference signal resource configuration
information determined by the determining unit 601 further
includes: reference signal power information of at least two port
groups that is used by the user equipment to acquire the signal
quality measurement information according to the reference signal
port configuration information and in combination with the
reference signal power information of the at least two port groups;
and
[0402] the reference signal power information of the at least two
port groups includes:
[0403] a reference signal power of a first port group, and a ratio
of a reference signal power of each port group among the rest port
groups to the reference signal power of the first port group;
or
[0404] a reference signal power of a first port group, and a
differential between a reference signal power of each port group
among the rest port groups and the reference signal power of the
first port group.
[0405] Optionally, when the signal quality measurement information
is a reference signal received power (RSRP), the first sending unit
602 is further configured to send, to the user equipment, filter
coefficient information that is used by the user equipment to
perform, based on the filter coefficient information, filtering on
the RSRP and obtain a path loss estimation value.
[0406] Optionally, the apparatus further includes:
[0407] a first receiving unit 603, configured to receive an uplink
physical channel or an uplink physical signal sent by the user
equipment, where a transmit power of the uplink physical channel or
the uplink physical signal is obtained by means of calculation by
the user equipment according to the path loss estimation value.
[0408] Optionally, the signal quality measurement information
includes:
[0409] any one or any combination of a reference signal received
power (RSRP), a reference signal received quality (RSRQ), and a
reference signal strength indicator (RSSI).
[0410] Optionally, the apparatus further includes: a second
receiving unit 604, where
[0411] the second receiving unit 604 is configured to receive the
signal quality measurement information sent by the user
equipment.
[0412] The first receiving unit 603 and the second receiving unit
604 may be integrated in a same physical module, or may be regarded
as being implemented by using a same module; the description of the
first receiving unit and the second receiving unit is used for
better understanding of connection relationships among modules in
the network side apparatus.
Embodiment 6
[0413] This embodiment of the present disclosure provides user
equipment. As shown in FIG. 8, the user equipment includes: a third
receiving unit 701, a first acquiring unit 702, and a second
acquiring unit 703.
[0414] The third receiving unit 701 is configured to receive
reference signal resource configuration information sent by a base
station, where the reference signal resource configuration
information includes reference signal port configuration
information, where the reference signal port configuration
information is used for indicating a mapping relationship between a
reference signal port and a port group.
[0415] The first acquiring unit 702 is configured to obtain
reference signal port information in at least one port group
according to the reference signal port configuration information
received by the third receiving unit 701.
[0416] The second acquiring unit 703 is configured to acquire
signal quality measurement information according to the reference
signal port information, in the at least one port group, obtained
by the first acquiring unit 702.
[0417] For the user equipment described in this embodiment,
reference may be made to the description of the corresponding steps
in Embodiment 2 for implementation of functions of units of the
user equipment, which is no longer repeated herein.
[0418] The apparatus described in Embodiment 6 above receives
reference signal resource configuration information determined on a
network side, where the reference signal resource configuration
information includes reference signal port configuration
information, where the reference signal port configuration
information is used for indicating a mapping relationship between a
reference signal port and a port group. The apparatus can avoid
that reference signal power related information is indicated port
by port, so as to reduce a signaling overhead; further, a uniform
power indicator is used for ports in a port group, and for
different port groups, power related information of the port groups
may be indicated independently, so that full use of an antenna
configuration or an antenna array structure is made, thereby
enabling a system to flexibly select reference signal power related
information according to the antenna configuration or the antenna
array structure; because an antenna array may have symmetric
weights, by means of the symmetry of the weights, design complexity
in beamforming or side lobe suppression can be reduced.
[0419] Further, the reference signal resource configuration
information is sent to UE on a user side, and the UE may perform
processing according to reference signal quality, of at least one
port group, in the reference signal resource configuration
information to obtain final signal quality measurement information,
so that a UE side can distinguish ports according to different port
groups, which differs from a case in which transmit powers of
different ports cannot be distinguished in the prior art. The UE is
enabled to acquire signal quality measurement information, so that
the UE can perform more accurate cell selection and uplink power
control.
[0420] Optionally, the first acquiring unit 702 is specifically
configured to obtain reference signal port information in one
specified port group according to the reference signal port
configuration information received by the third receiving unit
701.
[0421] The second acquiring unit 703 is specifically configured to
acquire the signal quality measurement information according to the
reference signal port information, in the one specified port group,
obtained by the first acquiring unit 702.
[0422] Optionally, when the signal quality measurement information
is a reference signal received power (RSRP), the second acquiring
unit 703 is specifically configured to:
[0423] obtain reference signal received power RSRP(r,p) of a pth
port of an rth receive antenna according to a formula
R S R P ( r , p ) = 1 K s - 1 m = 0 K s - 1 h ^ p ( m ) h ^ p ( m +
1 ) ##EQU00010##
and obtain the RSRP by combining RSRP(r,p), where h.sub.p(m) is a
channel estimation on a reference signal RE whose label number is
m, K.sub.s is a total sample quantity of usable reference signal
REs in measurement bandwidth, p is a number of a reference signal
port in the one specified port group, and r is an index of a
receive antenna.
[0424] Optionally, the reference signal resource configuration
information received by the third receiving unit 701 further
includes: reference signal power information of at least two port
groups.
[0425] The second acquiring unit 703 is further configured to
acquire the signal quality measurement information according to the
reference signal port configuration information and in combination
with the reference signal power information of the at least two
port groups.
[0426] Optionally, the second acquiring unit 703 is specifically
configured to:
[0427] obtain, according to the reference signal port configuration
information, signal quality measurement information corresponding
to the at least two port groups; and
[0428] perform, according to the reference signal power information
of the at least two port groups, weighted averaging on the obtained
signal quality measurement information corresponding to the at
least two port groups in accordance with a port group power, to
obtain the signal quality measurement information.
[0429] Optionally, the performing, by the second acquiring unit
703, according to the reference signal power information of the at
least two port groups, weighted averaging on the obtained signal
quality measurement information corresponding to the at least two
port groups in accordance with a port group power, to obtain the
signal quality measurement information includes:
[0430] obtaining the signal quality measurement information
according to a formula
S Q = ( g = 0 n - 1 p g S Q g ) / ( g = 0 n - 1 p g ) ,
##EQU00011##
where
[0431] SQ.sub.g is signal quality measurement information of a
specified port group, g is a sequence number of a specified port
group, n is a quantity of specified port groups, n.gtoreq.2, and
p.sub.g is a reference signal power of a specified port group,
where the reference signal power of the specified port group is
obtained according to the reference signal power information of the
at least two port groups.
[0432] Optionally, the reference signal power information, of the
at least two port groups, received by the third receiving unit 701
includes:
[0433] a reference signal power of a first port group, and a ratio
of a reference signal power of each port group among the rest port
groups to the reference signal power of the first port group;
or
[0434] a reference signal power of a first port group, and a
differential between a reference signal power of each port group
among the rest port groups and the reference signal power of the
first port group.
[0435] Optionally, the user equipment further includes: a second
sending unit 704, configured to send the signal quality measurement
information to the base station.
[0436] Optionally,
[0437] the third receiving unit 701 is further configured to: when
the signal quality measurement information is a reference signal
received power RSRP, receive filter coefficient information sent by
the base station; and
[0438] the user equipment further includes: a third acquiring unit
705, where
[0439] the third acquiring unit 705 is configured to perform, based
on the filter coefficient information received by the third
receiving unit 701, filtering on the reference signal received
power RSRP, and obtain a path loss estimation value.
[0440] Optionally, the user equipment further includes: a third
sending unit 706, where
[0441] the third sending unit 706 is further configured to send an
uplink physical channel or an uplink physical signal to the base
station, where a transmit power of the uplink physical channel or
the uplink physical signal is obtained by means of calculation
according to the path loss estimation value.
[0442] The third sending unit 706 and the second sending unit 704
may be implemented by using a same physical module, and this time
are described separately for ease of understanding.
[0443] Optionally, the signal quality measurement information
includes: a reference signal received power (RSRP), a reference
signal strength indicator (RSSI), or a reference signal received
quality (RSRQ).
Embodiment 7
[0444] This embodiment of the present disclosure provides a network
side apparatus. As shown in FIG. 9, the apparatus includes: a
fourth sending unit 801 and a fourth receiving unit 802.
[0445] The fourth sending unit 801 is configured to send reference
signal resource configuration information to user equipment, where
the reference signal resource configuration information includes:
reference signal port configuration information and power ratio
information, where the reference signal port configuration
information is used for indicating a mapping relationship between
the reference signal port and a port group, and the power ratio
information is used for indicating a power ratio of a data channel
of at least one port group to a reference signal.
[0446] The fourth receiving unit 802 is configured to receive
channel state information CSI sent by the user equipment, where the
CSI is obtained by the user equipment according to the reference
signal port configuration information and the power ratio
information.
[0447] The network side apparatus described in Embodiment 7 above
determines reference signal resource configuration information by
using a network side, and sends the reference signal resource
configuration information to a user side, where the reference
signal resource configuration information includes reference signal
port configuration information and power ratio information, where
the reference signal port configuration information is used for
indicating a mapping relationship between the reference signal port
and a port group, and the power ratio information is used for
indicating a power ratio of a data channel of at least one port
group to a reference signal. The apparatus can avoid that reference
signal power related information is indicated port by port, so as
to reduce a signaling overhead; further, a uniform power indicator
is used for ports in a port group, and for different port groups,
power related information of the port groups may be indicated
independently, so that full use of an antenna configuration or an
antenna array structure is made, thereby enabling a system to
flexibly select reference signal power related information
according to the antenna configuration or the antenna array
structure; because an antenna array may have symmetric weights, by
means of the symmetry of the weights, design complexity in
beamforming or side lobe suppression can be reduced.
[0448] Further, the reference signal resource configuration
information is sent to UE on the user side, and the UE may perform
processing according to reference signal quality, of one port group
or multiple port groups, in the reference signal resource
configuration information to obtain final signal quality
measurement information, so that a UE side can distinguish ports
according to different port groups, which differs from a case in
which transmit powers of different ports cannot be distinguished in
the prior art. The UE is enabled to acquire channel state
information, so that the UE can perform more accurate modulation
and coding scheme (MCS) selection or scheduling, thereby increasing
a throughput of a system.
[0449] Optionally, in the power ratio information:
[0450] power ratios of data channels on antenna ports in each port
group among the at least one port group to a reference signal are
the same; or
[0451] power ratios of data channels on ports in one port group
among the at least one port group and data channels on ports in
another port group to a reference signal are the same.
[0452] Optionally, the power ratio information is used for
indicating multiple sets of power ratios of data channels of the at
least one port group to a reference signal; and
[0453] the fourth receiving unit 802 is specifically configured to
receive multiple sets of CSI that are sent by the user equipment,
where each set of CSI is obtained by the user equipment according
to one set of power ratios among the multiple sets of power
ratios.
[0454] Optionally, the CSI received by the fourth receiving unit
802 includes: any one or any combination of a channel quality
indicator (CQI), a precoding matrix indicator (PMI), and a rank
indicator (RI).
[0455] The network side apparatus provided in this embodiment may
be a base station on a network side, and reference may be made to
the description of the corresponding steps in Embodiment 3 for
implementation of functions of units of the network side apparatus,
which is no longer repeated herein.
Embodiment 8
[0456] This embodiment of the present disclosure provides user
equipment. As shown in FIG. 10, the user equipment includes: a
fifth receiving unit 901, a fourth acquiring unit 902, a fifth
acquiring unit 903, and a fifth sending unit 904.
[0457] The fifth receiving unit 901 is configured to receive
reference signal resource configuration information sent by a base
station, where the reference signal resource configuration
information includes: reference signal port configuration
information and power ratio information, where the reference signal
port configuration information is used for indicating a mapping
relationship between the reference signal port and a port group,
and the power ratio information is used for indicating a power
ratio of a data channel of at least one port group to a reference
signal.
[0458] The fourth acquiring unit 902 is configured to obtain a
power ratio of a data channel on each antenna port in the at least
one port group to a reference signal according to the reference
signal port configuration information and the power ratio
information that are received by the fifth receiving unit 901.
[0459] The fifth acquiring unit 903 is configured to obtain CSI
according to the power ratio, of the data channel on each antenna
port to the reference signal, obtained by the fourth acquiring unit
902.
[0460] The fifth sending unit 904 is configured to send, to the
base station, the CSI obtained by the fifth acquiring unit 903.
[0461] This embodiment of the present disclosure provides user
equipment. The apparatus may perform processing according to
reference signal quality of one port group or multiple port groups
to obtain final signal quality measurement information, so that a
UE side can distinguish ports according to different port groups,
which differs from a case in which transmit powers of different
ports cannot be distinguished in the prior art. The UE is enabled
to acquire channel state information, so that the UE can perform
more accurate modulation and coding scheme (MCS) selection or
scheduling, thereby increasing a throughput of a system.
[0462] Optionally, the fifth acquiring unit 903 is specifically
configured to:
[0463] obtain, according to the reference signal on each antenna
port, a channel measurement value corresponding to each antenna
port;
[0464] obtain a channel estimation value of the data channel on
each antenna port according to the channel measurement value
corresponding to each antenna port and the power ratio of the data
channel on each antenna port to the reference signal; and
[0465] obtain the CSI according to the channel estimation value of
the data channel on each antenna port.
[0466] Optionally, the obtaining, by the fifth acquiring unit 903,
a channel estimation value of the data channel on each antenna port
according to the channel measurement value corresponding to each
antenna port and the power ratio of the data channel on each
antenna port to the reference signal includes:
[0467] obtaining a channel estimation value of a data channel on an
antenna port p according to a formula h.sub.p= {square root over
(.rho..sub.p)}h.sub.p, where
[0468] p is an index of the antenna port, .rho..sub.p is a power
ratio of the data channel on the antenna port p to a reference
signal, h.sub.p is a channel measurement value corresponding to the
antenna port p, and h.sub.p is a channel estimation value of the
data channel on the antenna port p.
[0469] Optionally, in the power ratio information:
[0470] power ratios of data channels on antenna ports in each port
group among the at least one port group to a reference signal are
the same; or
[0471] power ratios of data channels on ports in one port group
among the at least one port group and data channels on ports in
another port group to a reference signal are the same.
[0472] Optionally, the reference signal resource configuration
information received by the fifth receiving unit 901 includes: the
reference signal port configuration information and the power ratio
information.
[0473] The power ratio information is used for indicating multiple
sets of power ratios of data channels of the at least one port
group to a reference signal; and
[0474] the fifth sending unit 904 is specifically configured
to:
[0475] send multiple sets of CSI to the base station, where each
set of CSI is obtained according to one set of power ratios among
the multiple sets of power ratios.
[0476] Optionally, the CSI obtained by the fifth acquiring unit 903
includes: any one or any combination of a channel quality indicator
(CQI), a precoding matrix indicator (PMI), and a rank indicator
(RI).
[0477] For the user equipment provided in this embodiment,
reference may be made to the description of the corresponding steps
in Embodiment 4 for implementation of functions of units of the
user equipment, which is no longer repeated herein.
Embodiment 9
[0478] A network side apparatus is provided and can support a radio
communications technology. Transmission of a data packet can be
performed based on the method described in Embodiment 1 among units
in a communications device in this embodiment. A schematic
structural diagram is shown in FIG. 11, and the network side
apparatus includes: a processor 21, a receiver 23, and a
transmitter 24 that are separately connected to a bus.
[0479] Optionally, the shown network side apparatus may further
include: a memory 20.
[0480] Where:
[0481] the memory 20 is configured to store data input from the
receiver 23, and may further store information such as a necessary
file for the processor 21 to process data; and the receiver 23 and
the transmitter 24 are ports by using which a communications device
communicates with another device.
[0482] The processor 21 is configured to determine reference signal
resource configuration information, where the reference signal
resource configuration information includes reference signal port
configuration information, where the reference signal port
configuration information is used for indicating a mapping
relationship between a reference signal port and a port group.
[0483] The transmitter 24 is configured to send the reference
signal resource configuration information to user equipment, so
that the user equipment acquires signal quality measurement
information according to the reference signal port configuration
information.
[0484] Optionally, the reference signal resource configuration
information determined by the processor 21 further includes:
reference signal power information of at least two port groups that
is used by the user equipment to acquire the signal quality
measurement information according to the reference signal port
configuration information and in combination with the reference
signal power information of the at least two port groups.
[0485] The reference signal power information of the at least two
port groups includes:
[0486] a reference signal power of a first port group, and a ratio
of a reference signal power of each port group among the rest port
groups to the reference signal power of the first port group;
or
[0487] a reference signal power of a first port group, and a
differential between a reference signal power of each port group
among the rest port groups and the reference signal power of the
first port group.
[0488] Optionally, when the signal quality measurement information
is a reference signal received power (RSRP), the transmitter 24 is
further configured to send, to the user equipment, filter
coefficient information that is used by the user equipment to
perform, based on the filter coefficient information, filtering on
the RSRP and obtain a path loss estimation value.
[0489] Optionally, the receiver 23 is configured to receive an
uplink physical channel or an uplink physical signal sent by the
user equipment, where a transmit power of the uplink physical
channel or the uplink physical signal is obtained by means of
calculation by the user equipment according to the path loss
estimation value.
[0490] Optionally, the signal quality measurement information
includes:
[0491] any one or any combination of a reference signal received
power (RSRP), a reference signal received quality (RSRQ), and a
reference signal strength indicator (RSSI).
[0492] Optionally, the receiver 23 is further configured to receive
the signal quality measurement information sent by the user
equipment.
[0493] The network side apparatus described in this embodiment may
be a base station on a network side, and reference may be made to
the description of the corresponding steps in Embodiment 1 for
implementation of functions of units of the network side apparatus,
which is no longer repeated herein.
Embodiment 10
[0494] This embodiment provides user equipment, which can support a
radio communications technology. Transmission of a data packet can
be performed based on the method described in Embodiment 2 among
units in a communications device in this embodiment. A schematic
structural diagram is shown in FIG. 12, and the user equipment
includes: a processor 31, a receiver 33, and a transmitter 34 that
are separately connected to a bus.
[0495] Optionally, the shown network side apparatus may further
include: a memory 30.
[0496] The memory 30 is configured to store data input from the
receiver 33, and may further store information such as a necessary
file for the processor 31 to process data; and the receiver 33 and
the transmitter 34 are ports by using which a communications device
communicates with another device.
[0497] The receiver 33 is configured to receive reference signal
resource configuration information sent by a base station, where
the reference signal resource configuration information includes
reference signal port configuration information, where the
reference signal port configuration information is used for
indicating a mapping relationship between a reference signal port
and a port group.
[0498] The processor 31 is configured to obtain reference signal
port information in at least one port group according to the
reference signal port configuration information; and acquire signal
quality measurement information according to the reference signal
port information in the at least one port group.
[0499] Optionally, the processor 31 is specifically configured
to:
[0500] obtain reference signal port information in one specified
port group according to the reference signal port configuration
information; and
[0501] acquire the signal quality measurement information according
to the reference signal port information in the one specified port
group.
[0502] Optionally, when the signal quality measurement information
is a reference signal received power (RSRP), the acquiring, by the
processor 31, the signal quality measurement information according
to the reference signal port information in the one specified port
group includes:
[0503] obtaining a reference signal received power RSRP(r,p) of a
pth port of an rth receive antenna according to a formula
R S R P ( r , p ) = 1 K s - 1 m = 0 K s - 1 h ^ p ( m ) h ^ p ( m +
1 ) ##EQU00012##
and obtaining the RSRP by combining RSRP(r,p), where h.sub.p (m) is
a channel estimation on a reference signal RE whose label number is
m, K.sub.s is a total sample quantity of usable reference signal
REs in measurement bandwidth, p is a number of a reference signal
port in the one specified port group, and r is an index of a
receive antenna.
[0504] Optionally, the reference signal resource configuration
information received by the receiver 33 further includes: reference
signal power information of at least two port groups that is used
by the user equipment to acquire the signal quality measurement
information according to the reference signal port configuration
information and in combination with the reference signal power
information of the at least two port groups.
[0505] Optionally, the acquiring, by the processor 31, the signal
quality measurement information according to the reference signal
port configuration information and in combination with the
reference signal power information of the at least two port groups
includes:
[0506] obtaining, according to the reference signal port
configuration information, signal quality measurement information
corresponding to the at least two port groups; and
[0507] performing, according to the reference signal power
information of the at least two port groups, weighted averaging on
the obtained signal quality measurement information corresponding
to the at least two port groups in accordance with a port group
power, to obtain the signal quality measurement information.
[0508] Optionally, the performing, by the processor 31, according
to the reference signal power information of the at least two port
groups, weighted averaging on the obtained signal quality
measurement information corresponding to the at least two port
groups in accordance with a port group power, to obtain the signal
quality measurement information includes:
[0509] obtaining the signal quality measurement information
according to a formula
S Q = ( g = 0 n - 1 p g S Q g ) / ( g = 0 n - 1 p g ) ,
##EQU00013##
where
[0510] SQ.sub.g is signal quality measurement information of a
specified port group, g is a sequence number of a specified port
group, n is a quantity of specified port groups, n.gtoreq.2, and
p.sub.g is a reference signal power of a specified port group,
where the reference signal power of the specified port group is
obtained according to the reference signal power information of the
at least two port groups.
[0511] Optionally, the reference signal power information, of the
at least two port groups, received by the receiver 33 includes:
[0512] a reference signal power of a first port group, and a ratio
of a reference signal power of each port group among the rest port
groups to the reference signal power of the first port group;
or
[0513] a reference signal power of a first port group, and a
differential between a reference signal power of each port group
among the rest port groups and the reference signal power of the
first port group.
[0514] Optionally, the transmitter 34 is configured to send the
signal quality measurement information to the base station.
[0515] Optionally, when the signal quality measurement information
is a reference signal received power (RSRP), the receiver 33 is
further configured to receive filter coefficient information sent
by the base station; and
[0516] the processor 31 is further configured to perform, based on
the filter coefficient information, filtering on the RSRP, and
obtain a path loss estimation value.
[0517] Optionally, the transmitter 34 is further configured to send
an uplink physical channel or an uplink physical signal to the base
station, where a transmit power of the uplink physical channel or
the uplink physical signal is obtained by means of calculation
according to the path loss estimation value.
[0518] Optionally, the signal quality measurement information
includes: a reference signal received power (RSRP), a reference
signal strength indicator (RSSI), or a reference signal received
quality (RSRQ).
Embodiment 11
[0519] A network side apparatus is provided and can support a radio
communications technology. Transmission of a data packet can be
performed based on the method described in Embodiment 3 among units
in a communications device in this embodiment. A schematic
structural diagram is shown in FIG. 13, and the network side
apparatus includes: a processor 41, a receiver 43, and a
transmitter 44 that are separately connected to a bus.
[0520] Optionally, the shown network side apparatus may further
include: a memory 40.
[0521] The memory 40 is configured to store data input from the
receiver 43, and may further store information such as a necessary
file for the processor 41 to process data; and the receiver 43 and
the transmitter 44 are ports by using which a communications device
communicates with another device.
[0522] The transmitter 44 is configured to send reference signal
resource configuration information to user equipment, where the
reference signal resource configuration information includes:
reference signal port configuration information and power ratio
information, where the reference signal port configuration
information is used for indicating a mapping relationship between
the reference signal port and a port group, and the power ratio
information is used for indicating a power ratio of a data channel
of at least one port group to a reference signal; and
[0523] the receiver 43 is configured to receive CSI sent by the
user equipment, where the CSI is obtained by the user equipment
according to the reference signal port configuration information
and the power ratio information.
[0524] Optionally, in the power ratio information:
[0525] power ratios of data channels on antenna ports in each port
group among the at least one port group to a reference signal are
the same; or
[0526] power ratios of data channels on ports in one port group
among the at least one port group and data channels on ports in
another port group to a reference signal are the same.
[0527] Optionally, the power ratio information is used for
indicating multiple sets of power ratios of data channels of the at
least one port group to a reference signal; and
[0528] the receiving, by the receiver 33, CSI sent by the user
equipment includes: receiving multiple sets of CSI that are sent by
the user equipment, where each set of CSI is obtained by the user
equipment according to one set of power ratios among the multiple
sets of power ratios.
[0529] Optionally, the CSI received by the receiver 33 includes:
any one or any combination of a channel quality indicator (CQI), a
precoding matrix indicator (PMI), and a rank indicator (RI).
[0530] The network side apparatus provided in this embodiment may
be a base station on a network side, and reference may be made to
the description of the corresponding steps in Embodiment 3 for
implementation of functions of units of the network side apparatus,
which is no longer repeated herein.
Embodiment 12
[0531] This embodiment provides user equipment, which can support a
radio communications technology. Transmission of a data packet can
be performed based on the method described in Embodiment 4 among
units in a communications device in this embodiment. A schematic
structural diagram is shown in FIG. 14, and the user equipment
includes: a processor 51, a receiver 53, and a transmitter 54 that
are separately connected to a bus.
[0532] Optionally, the shown network side apparatus may further
include: a memory 50.
[0533] The memory 50 is configured to store data input from the
receiver 53, and may further store information such as a necessary
file for the processor 51 to process data; and the receiver 53 and
the transmitter 54 are ports by using which a communications device
communicates with another device.
[0534] The receiver 53 is configured to receive reference signal
resource configuration information sent by a base station, where
the reference signal resource configuration information includes:
reference signal port configuration information and power ratio
information, where the reference signal port configuration
information is used for indicating a mapping relationship between
the reference signal port and a port group, and the power ratio
information is used for indicating a power ratio of a data channel
of at least one port group to a reference signal.
[0535] The processor 51 is configured to obtain a power ratio of a
data channel on each antenna port in the at least one port group to
a reference signal according to the reference signal port
configuration information and the power ratio information, and
obtain CSI according to the power ratio of the data channel on each
antenna port to the reference signal.
[0536] The transmitter 54 is configured to send the CSI to the base
station.
[0537] Optionally, the obtaining, by the processor 51, CSI
according to the power ratio of the data channel on each antenna
port to the reference signal includes:
[0538] obtaining, according to the reference signal on each antenna
port, a channel measurement value corresponding to each antenna
port;
[0539] obtaining a channel estimation value of the data channel on
each antenna port according to the channel measurement value
corresponding to each antenna port and the power ratio of the data
channel on each antenna port to the reference signal; and
[0540] obtaining the CSI according to the channel estimation value
of the data channel on each antenna port.
[0541] Optionally, the obtaining, by the processor 51, a channel
estimation value of the data channel on each antenna port according
to the channel measurement value corresponding to each antenna port
and the power ratio of the data channel on each antenna port to the
reference signal includes:
[0542] obtaining a channel estimation value of a data channel on an
antenna port p according to a formula h.sub.p= {square root over
(.rho..sub.p)}h.sub.p, where
[0543] p is an index of the antenna port, .rho..sub.p is a power
ratio of the data channel on the antenna port p to a reference
signal, h.sub.p is a channel measurement value corresponding to the
antenna port p, and h.sub.p is a channel estimation value of the
data channel on the antenna port p.
[0544] Optionally, in the power ratio information:
[0545] power ratios of data channels on antenna ports in each port
group among the at least one port group to a reference signal are
the same; or
[0546] power ratios of data channels on ports in one port group
among the at least one port group and data channels on ports in
another port group to a reference signal are the same.
[0547] Optionally, the power ratio information is used for
indicating multiple sets of power ratios of data channels of the at
least one port group to a reference signal; and
[0548] the transmitter 54 is specifically configured to:
[0549] send multiple sets of CSI to the base station, where each
set of CSI is obtained according to one set of power ratios among
the multiple sets of power ratios.
[0550] Optionally, the CSI obtained by the processor 51 includes:
any one or any combination of a channel quality indicator (CQI), a
precoding matrix indicator (PMI), and a rank indicator (RI).
[0551] A person of ordinary skill in the art may understand that
all or a part of the steps of the methods in the embodiments may be
implemented by a program instructing relevant hardware. The program
may be stored in a computer readable storage medium. The storage
medium may include: a ROM, a RAM, a magnetic disk, or an optical
disc.
[0552] The method and the apparatus for measuring communication
quality provided in the embodiments of the present disclosure are
introduced above in detail. In this specification, specific
examples are used to describe the principle and implementation
manners of the present disclosure, and the description of the
embodiments is only intended to help understand the method and core
idea of the present disclosure. Meanwhile, a person of ordinary
skill in the art may, based on the idea of the present disclosure,
make modifications with respect to the specific implementation
manners and the application scope. Therefore, the content of this
specification shall not be construed as a limitation to the present
disclosure.
* * * * *