U.S. patent application number 14/849545 was filed with the patent office on 2015-12-31 for device of handling periodic csi report.
The applicant listed for this patent is Industrial Technology Research Institute. Invention is credited to Ping-Heng Kuo.
Application Number | 20150381255 14/849545 |
Document ID | / |
Family ID | 48651894 |
Filed Date | 2015-12-31 |
United States Patent
Application |
20150381255 |
Kind Code |
A1 |
Kuo; Ping-Heng |
December 31, 2015 |
Device of Handling Periodic CSI Report
Abstract
A communication device for handling periodic channel state
information (CSI) reports comprises a storage unit for storing
instructions and a processing means coupled to the storage unit.
The processing means is configured to execute the instructions
stored in the storage unit. The instructions comprise determining
at least one field difference between a reference CSI report and at
least one periodic CSI report, wherein the at least one periodic
CSI report corresponds to at least one component carrier,
respectively; transmitting the reference CSI report to a network;
and transmitting the at least one field difference to the
network.
Inventors: |
Kuo; Ping-Heng; (New Taipei
City, TW) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Industrial Technology Research Institute |
HSINCHU |
|
TW |
|
|
Family ID: |
48651894 |
Appl. No.: |
14/849545 |
Filed: |
September 9, 2015 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
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13909091 |
Jun 4, 2013 |
9161153 |
|
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14849545 |
|
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|
|
61659996 |
Jun 15, 2012 |
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Current U.S.
Class: |
370/329 |
Current CPC
Class: |
H04B 7/0639 20130101;
H04B 7/0632 20130101; H04B 7/0626 20130101; H04L 1/0029 20130101;
H04L 27/2601 20130101; H04B 7/063 20130101; H04L 43/06 20130101;
H04L 1/0026 20130101; H04L 5/0005 20130101; H04B 7/024 20130101;
H04W 4/00 20130101 |
International
Class: |
H04B 7/06 20060101
H04B007/06; H04L 12/26 20060101 H04L012/26 |
Claims
1. A communication device for handling periodic channel state
information (CSI) reports, comprising: a storage unit for storing
instructions of: determining at least one field difference between
a reference CSI report and at least one periodic CSI report,
wherein the at least one periodic CSI report corresponds to at
least one component carrier, respectively; transmitting the
reference CSI report to a network; and transmitting the at least
one field difference to the network; and a processing means,
coupled to the storage unit, configured to execute the instructions
stored in the storage unit.
2. The communication device of claim 1, wherein each of the at
least one periodic CSI report comprises at least one field which
comprises at least one of a Channel Quality Indicator (CQI), a
Precoding Matrix Index (PMI), a Rank Indicator (RI) and a Precoder
Type Indicator (PTI).
3. The communication device of claim 1, wherein the instruction of
transmitting the at least one field difference to the network
further comprises: determining at least one value corresponding to
the at least one field difference according to a predetermined
table; and transmitting the at least one value to the network.
4. The communication device of claim 1, wherein each of the at
least one value is represented by at least one bit.
5. A communication device for handling a periodic channel state
information (CSI) report, comprising: a storage unit for storing
instructions of: omitting at least one field in a periodic CSI
report corresponding to a component carrier, when the periodic CSI
report collides with another CSI report; and transmitting the
periodic CSI report to a network; and a processing means, coupled
to the storage unit, configured to execute the instructions stored
in the storage unit.
6. The communication device of claim 5, wherein the network
determines that the at least one field is the same as at least one
corresponding field in a reference CSI report.
7. The communication device of claim 6, wherein the reference CSI
report is transmitted to the network, before transmitting the
periodic CSI report to the network.
8. The communication device of claim 5, wherein the at least one
field comprises at least one of a Channel Quality Indicator (CQI),
a Precoding Matrix Index (PMI), a Rank Indicator (RI) and a
Precoder Type Indicator (PTI) in the periodic CSI report.
9. A communication device for handling periodic channel state
information (CSI) reports, comprising: a storage unit for storing
instructions of: dropping at least one first periodic CSI report,
when the at least one first periodic CSI report collides with at
least one second periodic CSI report, wherein the at least one
first periodic CSI report and the at least one second periodic CSI
report correspond to a plurality of component carriers,
respectively; and transmitting the at least one second periodic CSI
report to a network; transmitting an indicator to the network,
wherein the indicator indicates which CSI report is dropped or
which CSI report is transmitted; and a processing means, coupled to
the storage unit, configured to execute the instructions stored in
the storage unit.
10. The communication device of claim 9, wherein each of the at
least one first CSI report and the at least one second CSI report
comprises at least one of a Channel Quality Indicator (CQI), a
Precoding Matrix Index (PMI), a Rank Indicator (RI) and a Precoder
Type Indicator (PTI).
11. The communication device of claim 9, wherein the indicator
comprises at least one identity corresponding to the at least one
first periodic CSI report or the at least one second periodic CSI
report.
12. The communication device of claim 9, wherein the at least one
first periodic CSI report collides with the at least one second
periodic CSI report, when the at least one first periodic CSI
report collides with the at least one second periodic CSI report
are scheduled to be transmitted via the same resource.
Description
CROSS REFERENCE TO RELATED APPLICATIONS
[0001] This is a continuation application of U.S. Application Ser.
No. 13/909,091, filed on Jun. 4, 2013, which claims the benefit of
U.S. Provisional Application No. 61/659,996, filed on Jun. 15,
2012.
BACKGROUND OF THE INVENTION
[0002] 1. Field of the Invention
[0003] The present invention relates to a device used in a wireless
communication system and related communication device, and more
particularly, to a device of handling a periodic channel state
information (CSI) report.
[0004] 2. Description of the Prior Art
[0005] A long-term evolution (LTE) system supporting the 3GPP Rel-8
standard and/or the 3GPP Rel-9 standard are developed by the 3rd
Generation Partnership Project (3GPP) as a successor of a universal
mobile telecommunications system (UMTS), for further enhancing
performance of the UMTS to satisfy increasing needs of users. The
LTE system includes a new radio interface and a new radio network
architecture that provides a high data rate, low latency, packet
optimization, and improved system capacity and coverage. In the LTE
system, a radio access network known as an evolved universal
terrestrial radio access network (E-UTRAN) includes multiple
evolved Node-Bs (eNBs) for communicating with multiple user
equipments (UEs), and communicating with a core network including a
mobility management entity (MME), a serving gateway, etc., for
Non-Access Stratum (NAS) control.
[0006] A LTE-advanced (LTE-A) system, as its name implies, is an
evolution of the LTE system. The LTE-A system targets faster
switching between power states, improves performance at the
coverage edge of an eNB, and includes advanced techniques, such as
carrier aggregation (CA), coordinated multipoint (CoMP)
transmission/reception, UL multiple-input multiple-output (MIMO),
etc. For a UE and an eNB to communicate with each other in the
LTE-A system, the UE and the eNB must support standards developed
for the LTE-A system, such as the 3GPP Rel-10 standard or later
versions.
[0007] In detail, when the CoMP is configured to a UE and multiple
transmission points, the UE may communicate with the transmission
points simultaneously, i.e., access a service via all or part of
the transmission points. For example, a transmission point can be
an eNB, a relay node or a remote antenna of an eNB (e.g., remote
radio head (RRH)). More specifically, an eNB may manage only one
transmission point, or may manage multiple transmission points.
That is, Cell IDs of different transmission points may be different
(e.g., when being managed by different eNBs), or may be the same
(e.g., when being managed by the same eNB). Thus, signals
transmitted between the UE and the transmission points can be
easily recovered due to better quality of the signals.
[0008] The CA is introduced to the LTE-A system by which more than
one component carriers (CCs) are aggregated to achieve a wide-band
transmission. Accordingly, the LTE-A system can support a wide
bandwidth up to 100 MHz by aggregating a maximum number of 5 CCs,
where a maximum bandwidth of each CC is 20 MHz and is backward
compatible with the 3 GPP Rel-8 standard. The LTE-A system supports
the CA for both contiguous and non-contiguous CCs. The CA increases
bandwidth flexibility by aggregating the CCs. When a UE is
configured with the CA, the UE has the ability to receive and/or
transmit packets on one or multiple CCs to increase throughput.
[0009] However, when the UE is configured with the CA or the CoMP,
the UE may need to report a large amount of sets of channel
information to the eNB, to communicate with the network regularly.
For example, the channel information corresponding to multiple
component carriers or the channel information between the UE and
multiple transmission points may be needed to be reported
periodically. The reporting periods of these multiple sets of
channel state information may be configured to be different, so
occasionally two or more sets of channel state information might
have to be reported at the same time (such event can be seen as
collision). However, due to the limited radio resource, the
capacity of uplink control channels may not be sufficient to
simultaneously contain multiple sets of channel state information
(CSI). The eNB cannot communicate with the UE efficiently, if part
of the channel information is lost due to the collision.
[0010] Thus, efficient reporting of multiple sets of channel
information is an important topic to be discussed.
SUMMARY OF THE INVENTION
[0011] The present invention therefore provides a communication
device for handling a periodic channel state information (CSI)
report to solve the abovementioned problem.
[0012] A communication device for handling periodic channel state
information (CSI) reports comprises a storage unit for storing
instructions and a processing means coupled to the storage unit.
The processing means is configured to execute the instructions
stored in the storage unit. The instructions comprise determining
at least one field difference between a reference CSI report and at
least one periodic CSI report, wherein the at least one periodic
CSI report corresponds to at least one component carrier,
respectively; transmitting the reference CSI report to a network;
and transmitting the at least one field difference to the
network.
[0013] A communication device for handling a periodic channel state
information (CSI) report comprises a storage unit for storing
instructions and a processing means coupled to the storage unit.
The processing means is configured to execute the instructions
stored in the storage unit. The instructions comprise omitting at
least one field in a periodic CSI report corresponding to a
component carrier, when the periodic CSI report collides with
another CSI report; and transmitting the periodic CSI report to a
network.
[0014] A communication device for handling periodic channel state
information (CSI) reports comprises a storage unit for storing
instructions and a processing means coupled to the storage unit.
The processing means is configured to execute the instructions
stored in the storage unit. The instructions comprise dropping at
least one first periodic CSI report, when the at least one first
periodic CSI report collides with at least one second periodic CSI
report, wherein the at least one first periodic CSI report and the
at least one second periodic CSI report correspond to a plurality
of component carriers, respectively; and transmitting the at least
one second periodic CSI report to a network; transmitting an
indicator to the network, wherein the indicator indicates which CSI
report is dropped or which CSI report is transmitted.
[0015] These and other objectives of the present invention will no
doubt become obvious to those of ordinary skill in the art after
reading the following detailed description of the preferred
embodiment that is illustrated in the various figures and
drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
[0016] FIG. 1 is a schematic diagram of a wireless communication
system according to an example of the present invention.
[0017] FIG. 2 is a schematic diagram of a communication device
according to an example of the present invention.
[0018] FIG. 3 is a flowchart of a process according to an example
of the present invention.
[0019] FIG. 4 is a table of CQI differences and corresponding bit
values according to an example of the invention.
[0020] FIG. 5 is a flowchart of a process according to an example
of the present invention.
[0021] FIG. 6 is a flowchart of a process according to an example
of the present invention.
DETAILED DESCRIPTION
[0022] Please refer to FIG. 1, which is a schematic diagram of a
wireless communication system 10 according to an example of the
present invention. The wireless communication system 10 is briefly
composed of a network and a plurality of user equipments (UEs). In
FIG. 1, the network and the UEs are simply utilized for
illustrating the structure of the wireless communication system 10.
Practically, the network can be a universal terrestrial radio
access network (UTRAN) comprising a plurality of Node-Bs (NBs) in a
universal mobile telecommunications system (UMTS). In another
example, the network can be an evolved UTRAN (E-UTRAN) comprising a
plurality of evolved NBs (eNBs) and/or relays in a long term
evolution (LTE) system, a LTE-Advanced (LTE-A) system or an
evolution of the LTE-A system.
[0023] In one example, the network and the UEs may support
coordinated multipoint (CoMP) transmission/reception, and the UEs
can communicate with transmission points (TPs) in the network
according to the CoMP. In detail, the CoMP can be classified into
two main categories: Joint Processing (JP) and Coordinated
Scheduling/Beamforming (CS/CB). A main difference between the JP
and the CS/CB is that data of the UE is available at all the
transmission points when the JP is configured (i.e. enabled), while
the data of the UE is only available at a serving point (i.e.,
serving cell) when the CS/CB is configured. The JP can be further
classified into two categories: joint transmission and dynamic
point selection. When the joint transmission is configured, the
data of the UE can be transmitted from multiple transmission points
(e.g., coherently or noncoherently) to the UE to improve signal
quality and/or cancel interferences. When the dynamic point
selection is configured, the data of the UE is transmitted from
only one of the transmission points (e.g., according to a choice or
suggestion of the UE) to the UE to improve the signal quality
and/or avoid the interferences. On the other hand, when the CS/CB
is configured, the data of the UE is only transmitted from the
serving point to the UE, while other transmission points may adjust
scheduling (e.g., stop their transmissions), or adjust beamforming
(e.g., move their beams) to mitigate the interferences. In
addition, the CoMP may also be a dynamic point blanking (DPB). In
another example, the network and the UEs may support carrier
aggregation (CA), and the UEs can communicate with the network via
multiple component carriers according to the CA.
[0024] Furthermore, the network can also include both the
UTRAN/E-UTRAN and a core network, wherein the core network includes
network entities such as Mobility Management Entity (MME), Serving
Gateway (S-GW), Packet Data Network (PDN) Gateway (P-GW),
Self-Organizing Networks (SON) server and/or Radio Network
Controller (RNC), etc. In other words, after the network receives
information transmitted by a UE, the information may be processed
only by the UTRAN/E-UTRAN and decisions corresponding to the
information are made at the UTRAN/E-UTRAN. Alternatively, the
UTRAN/E-UTRAN may forward the information to the core network, and
the decisions corresponding to the information are made at the core
network after the core network processes the information. Besides,
the information can be processed by both the UTRAN/E-UTRAN and the
core network, and the decisions are made after coordination and/or
cooperation are performed by the UTRAN/E-UTRAN and the core
network. A UE can be a mobile phone, a laptop, a tablet computer,
an electronic book or a portable computer system. Besides, the
network and the UE can be seen as a transmitter or a receiver
according to direction, e.g., for an uplink (UL), the UE is the
transmitter and the network is the receiver, and for a downlink
(DL), the network is the transmitter and the UE is the
receiver.
[0025] Please refer to FIG. 2, which is a schematic diagram of a
communication device 20 according to an example of the present
invention. The communication device 20 can be a UE or the network
shown in FIG. 1, but is not limited herein. The communication
device 20 may include a processing means 200 such as a
microprocessor or Application Specific Integrated Circuit (ASIC), a
storage unit 210 and a communication interfacing unit 220. The
storage unit 210 may be any data storage device that can store a
program code 214, accessed and executed by the processing means
200. Examples of the storage unit 210 include but are not limited
to a subscriber identity module (SIM), read-only memory (ROM),
flash memory, random-access memory (RAM), CD-ROM/DVD-ROM, magnetic
tape, hard disk and optical data storage device. The communication
interfacing unit 220 is preferably a transceiver and is used to
transmit and receive signals (e.g., messages or packets) according
to processing results of the processing means 200.
[0026] Please refer to FIG. 3, which is a flowchart of a process 30
according to an example of the present invention. The process 30
can be utilized in the UE shown in FIG. 1, for handling multiple
channel state information (CSI) reports (i.e., CSI processes). The
process 30 maybe compiled into the program code 214 and includes
the following steps:
[0027] Step 300: Start.
[0028] Step 302: Determine at least one field difference between a
reference CSI report and at least one CSI report.
[0029] Step 304: Transmit the reference CSI report to the
network.
[0030] Step 306: Transmit the at least one field difference to the
network, to transmit the at least one CSI report to the network,
respectively.
[0031] Step 308: End.
[0032] According to the process 30, the UE first determines at
least one field difference between a reference CSI report and at
least one CSI report. Then, the UE transmits the reference CSI
report to the network, and transmits the at least one field
difference to the network, to transmit the at least one CSI report
to the network, respectively. In other words, for a CSI report, the
UE transmits a field difference between the CSI report and the
reference CSI report to the network, instead of transmitting the
complete CSI report to the network. The field difference may
include one or more difference values between corresponding fields
of the CSI report and the reference CSI report. Thus, overhead
needed for transmitting the CSI report can be reduced.
[0033] Realization of the process 30 is not limited. For example,
the at least one CSI report may correspond to at least one
component carrier, respectively. That is, when the UE communicates
with the network via multiple component carriers according to the
CA, the UE needs to feed back the CSI reports corresponding to the
component carriers to the network. After the reference CSI report
is determined, the UE only needs to transmit the field differences
between the reference CSI report and the CSI reports to the
network. In another example, the at least one CSI report may
correspond to at least one transmission point in the network,
respectively. That is, when the UE communicates with multiple
transmission points in the network according to the CoMP, the UE
needs to feed back the CSI reports corresponding to the
transmission points to the network. In this situation, the CSI
reports may include channel information between the UE and the
transmission points. Similarly, the UE only needs to transmit the
field differences between the reference CSI report and the CSI
reports to the network. In another example, the at least one CSI
report may correspond to at least one CoMP configuration,
respectively, wherein a CoMP configuration may be the joint
transmission, the dynamic point selection, the CS/CB or the dynamic
point blanking. In addition, different CSI reports may correspond
to the same CoMP configuration with the same, partly different or
different realizations.
[0034] Note that detail of a CSI report mentioned above is not
limited. For example, the CSI report may include one or more fields
which include a Channel Quality Indicator (CQI), a Precoding Matrix
Index (PMI), a Rank Indicator (RI) and/or a Precoder Type Indicator
(PTI). In addition, the CSI reports may be transmitted in the same
subframe or different subframes, and is not limited herein.
[0035] Please refer to FIG. 4, which is a table 40 of CQI
differences and corresponding bit values according to an example of
the invention. CQI differences including "0", "+1", "-1" and
">+3" which correspond to bit values "00", "01", "10" and "11"
are considered in FIG. 4. For example, if the CQI difference
between a CQI and a reference CQI (i.e., CQI_ref) is "+1", i.e.,
CQI-CQI_ref=1, the UE transmits the bit value "01" to the network,
to indicate the difference "+1" to the network. Note that the
values and the CQI differences in the table 40 are simply used for
illustrating the present invention, and can be modified according
to design considerations and system requirements.
[0036] Thus, according to the above description and the process 30,
overhead needed for transmitting the CSI report can be reduced.
[0037] Please refer to FIG. 5, which is a flowchart of a process 50
according to an example of the present invention. The process 50
can be utilized in the UE shown in FIG. 1, for handling a CSI
report (i.e., CSI process). The process 50 may be compiled into the
program code 214 and includes the following steps:
[0038] Step 500: Start.
[0039] Step 502: Omit at least one field in a CSI report, when the
CSI report collides with another report.
[0040] Step 504: Transmit the CSI report to the network.
[0041] Step 506: End.
[0042] According to the process 50, the UE first omits (e.g.,
removes) at least one field in a CSI report, when the CSI report
collides with another CSI report. Then, the UE transmits the CSI
report to the network. In other words, the UE may further compress
the CSI report and transmit the compressed CSI report to the
network, since the at least one field is omitted. Thus, overhead
needed for transmitting the CSI report can be reduced.
[0043] Realization of the process 50 is not limited. For example,
the CSI report may correspond to a component carrier. That is, when
the UE communicates with the network via multiple component
carriers according to the CA, the UE needs to feed back the CSI
reports corresponding to the component carriers to the network. For
one of the CSI reports, the UE first omits one or more fields in
the CSI report, and transmit the CSI report to the network. In
another example, the CSI report may correspond to a transmission
point in the network. That is, when the UE communicates with
multiple transmission points in the network according to the CoMP,
the UE needs to feed back the CSI reports corresponding to the
transmission points to the network. In this situation, the CSI
reports may include channel information between the UE and the
transmission points. Similarly, for one of the CSI reports, the UE
first omits one or more fields in the CSI report, and transmit the
CSI report to the network. In another example, the CSI report may
correspond to a CoMP configuration, wherein a CoMP configuration
may be the joint transmission, the dynamic point selection, the
CS/CB or the dynamic point blanking. In addition, different CSI
reports may correspond to the same CoMP configuration with the
same, partly different or different realizations. After the network
receives the CSI report, the network can determine that the at
least one field is the same as at least one corresponding field in
a reference CSI report. Preferably, the reference CSI report is
transmitted to the network, before transmitting the CSI report to
the network.
[0044] Note that detail of the at least one field in the CSI report
mentioned above is not limited. For example, the at least one field
may include a CQI, a PMI, a RI and/or a PTI. For example, the CSI
report may include the fields which are the CQI, the PMI and the
RI. However, the CSI report may collide with another CSI report.
According to the present invention, the UE can omit the RI, and
transmit the CSI report including the PMI and the CQI to the
network. After the network receives the CSI report with the omitted
RI, the network can determine that the RI of the CSI report is the
same as a RI of a reference CSI report.
[0045] Thus, according to the above description and the process 50,
overhead needed for transmitting the CSI report can be reduced.
[0046] Please refer to FIG. 6, which is a flowchart of a process 60
according to an example of the present invention. The process 60
can be utilized in the UE shown in FIG. 1, for handling CSI reports
(i.e., CSI processes). The process 60 may be compiled into the
program code 214 and includes the following steps:
[0047] Step 600: Start.
[0048] Step 602: Drop at least a first CSI report, when the at
least a first CSI report collides with at least a second CSI
report.
[0049] Step 604: Transmit the at least a second CSI report and an
indicator to the network, wherein the indicator indicates the at
least a first CSI report or the at least a second CSI report.
[0050] Step 606: End.
[0051] According to the process 60, the UE first drops at least a
first CSI report, when the at least a first CSI report collides
with at least a second CSI report. Then, the UE transmits the at
least a second CSI report and an indicator to the network, wherein
the indicator indicates the at least a first CSI report or the at
least a second CSI report. For example, when two sets of the CSI
reports collide, the UE only transmits one set of the CSI reports
to the network, and the other set of the CSI reports is dropped.
Further, the UE also transmit an indication to the network, when
transmitting the set of the CSI reports. For example, the
indication may indicate the transmitted set of the CSI reports. In
another example, the indication may indicate the dropped set of the
CSI reports. Thus, the network can recognize the transmitted set of
the CSI reports and the dropped set of the CSI reports according to
the indication. As a result, collision between the CSI reports can
be avoided.
[0052] Realization of the process 60 is not limited. For example,
the at least a first CSI report and the at least a second CSI
report may correspond to a plurality of component carriers,
respectively. That is, when the UE communicates with the network
via multiple component carriers according to the CA, the UE needs
to feed back the CSI reports corresponding to the component
carriers to the network. When two CSI reports collide, the UE may
drop the first CSI report, and transmit the second CSI report and
an indication to the network, wherein the indication may indicate
the first CSI report or the second CSI report. In another example,
the at least a first CSI report and the at least a second CSI
report may correspond to a plurality of transmission points of the
network, respectively. That is, when the UE communicates with
multiple transmission points in the network according to the CoMP,
the UE needs to feed back the CSI reports corresponding to the
transmission points to the network. In this situation, the CSI
reports may include channel information between the UE and the
transmission points. Similarly, when two CSI reports collide, the
UE may drop the first CSI report, and transmit the second CSI
report and an indication to the network, wherein the indication may
indicate the first CSI report or the second CSI report. In another
example, the at least a first CSI report and the at least a second
CSI report may correspond to a plurality of CoMP configurations,
respectively, wherein a CoMP configuration may be the joint
transmission, the dynamic point selection, the CS/CB or dynamic
point blanking. In addition, different CSI reports may correspond
to the same CoMP configuration with the same, partly different or
different realizations.
[0053] Note that detail of a CSI report mentioned above is not
limited. For example, the CSI report may include one or more fields
which may include a CQI, a PMI, a RI and/or a PTI. On the other
hand, the indicator mentioned above may include at least one
identity corresponding to the at least a first CSI report or the at
least a second CSI report. For example, the indicator may include
an identity of a dropped CSI report for indicating the dropped CSI
report, or an identity of a transmitted CSI report for indicating
the transmitted CSI report. A method according to which the UE
determines that the first CSI report and the second CSI report
collide is not limited. For example, the UE may determine that the
first CSI report and the second CSI report collide, when the first
CSI report and the second CSI report collide are scheduled to be
transmitted via the same resource (e.g., the same subframe, the
same resource blocks, etc).
[0054] Thus, according to the above description and the process 60,
collision between the CSI reports can be avoided.
[0055] Those skilled in the art should readily make combinations,
modifications and/or alterations on the abovementioned description
and examples. The abovementioned steps of the processes including
suggested steps can be realized by means that could be a hardware,
a firmware known as a combination of a hardware device and computer
instructions and data that reside as read-only software on the
hardware device, or an electronic system. Examples of hardware can
include analog, digital and mixed circuits known as microcircuit,
microchip, or silicon chip. Examples of the electronic system can
include a system on chip (SOC), system in package (SiP), a computer
on module (COM), and the communication device 20.
[0056] To sum up, the present invention provides a device for
handling CSI reports. Overhead needed for transmitting the CSI
report can be reduced, and collision between the CSI reports can be
avoided. Thus, performance of the wireless communication system can
be improved.
[0057] Those skilled in the art will readily observe that numerous
modifications and alterations of the device and method may be made
while retaining the teachings of the invention. Accordingly, the
above disclosure should be construed as limited only by the metes
and bounds of the appended claims.
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