U.S. patent application number 16/715881 was filed with the patent office on 2020-04-16 for information transmission method, terminal device, and network device.
The applicant listed for this patent is HUAWEI TECHNOLOGIES CO., LTD.. Invention is credited to Chuanfeng HE, Jianqin LIU, Jianguo WANG, Xu ZHANG.
Application Number | 20200120659 16/715881 |
Document ID | / |
Family ID | 64659028 |
Filed Date | 2020-04-16 |
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United States Patent
Application |
20200120659 |
Kind Code |
A1 |
WANG; Jianguo ; et
al. |
April 16, 2020 |
Information Transmission Method, Terminal Device, And Network
Device
Abstract
One example method includes receiving, by a terminal device,
configuration information of a control channel resource set, where
the configuration information indicates the control channel
resource set, and the configuration information includes at least
one of a quantity of time-frequency resource blocks of a control
channel and an interval between two adjacent time-frequency
resource blocks, determining, by the terminal device, a
time-frequency resource of the control channel based on the
configuration information, and receiving, by the terminal device,
control information on the time-frequency resource of the control
channel.
Inventors: |
WANG; Jianguo; (Beijing,
CN) ; LIU; Jianqin; (Beijing, CN) ; HE;
Chuanfeng; (Shenzhen, CN) ; ZHANG; Xu;
(Beijing, CN) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
HUAWEI TECHNOLOGIES CO., LTD. |
Shenzhen |
|
CN |
|
|
Family ID: |
64659028 |
Appl. No.: |
16/715881 |
Filed: |
December 16, 2019 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
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PCT/CN2018/091823 |
Jun 19, 2018 |
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16715881 |
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Current U.S.
Class: |
1/1 |
Current CPC
Class: |
H04L 27/2655 20130101;
H04W 72/0406 20130101; H04L 5/0048 20130101; H04W 72/044 20130101;
H04L 5/0053 20130101; H04L 27/2601 20130101; H04L 27/2602 20130101;
H04L 5/0007 20130101; H04L 5/0094 20130101 |
International
Class: |
H04W 72/04 20060101
H04W072/04; H04L 5/00 20060101 H04L005/00 |
Claims
1. A method, comprising: receiving configuration information of a
control channel resource set, wherein the configuration information
indicates the control channel resource set, and wherein the
configuration information indicates at least one of a quantity of
time-frequency resource blocks of the control channel resource set
or an interval between two adjacent time-frequency resource blocks;
determining the control channel resource set based on the
configuration information; and receiving control information within
the control channel resource set.
2. The method according to claim 1, wherein the time-frequency
resource block comprises six consecutive resource element groups
REGs in frequency domain, and wherein each of the six REGs occupies
12 consecutive subcarriers in frequency domain.
3. The method according to claim 1, wherein the time-frequency
resource block comprises at least one resource element group REG
set, wherein the REG set comprises a plurality of REGs that are
consecutive or adjacent at least one of in time domain or in
frequency domain, and wherein each of the plurality of REGs
occupies 12 consecutive subcarriers in frequency domain and
occupies one OFDM symbol length in time domain.
4. The method according to claim 2, wherein the interval between
two adjacent time-frequency resource blocks is a frequency domain
resource corresponding to an integer quantity of REGs, or the
interval between two adjacent time-frequency resource blocks is a
frequency domain resource corresponding to an integer quantity of
REG sets.
5. The method according to claim 2, wherein a frequency domain size
of the REG set is two REGs, three REGs, or six REGs that are
consecutive or adjacent in frequency domain.
6. The method according to claim 2, wherein a time domain size of
the REG set is one REG, two REGs, or three REGs that are
consecutive or adjacent in time domain.
7. The method according to claim 2, wherein a quantity of REGs
comprised in the REG set is predefined.
8. An apparatus, comprising at least one processor and a memory,
wherein the memory is configured to store instructions, and the at
least one processor is configured to execute the instructions
stored in the memory to control the apparatus to implement the
following operations: receiving configuration information of a
control channel resource set, wherein the configuration information
indicates the control channel resource set, and wherein the
configuration information indicates at least one of a quantity of
time-frequency resource blocks of the control channel resource set
and an interval between two adjacent time-frequency resource
blocks; determining the control channel resource set based on the
configuration information; and receiving control information within
the control channel resource set.
9. The apparatus according to claim 8, wherein the time-frequency
resource block comprises six consecutive resource element groups
REGs in frequency domain, and wherein each of the six REGs occupies
12 consecutive subcarriers in frequency domain.
10. The apparatus according to claim 8, wherein the time-frequency
resource block comprises at least one resource element group REG
set, wherein the REG set comprises a plurality of REGs that are
consecutive or adjacent at least one of in time domain or in
frequency domain, and wherein each of the plurality of REGs
occupies 12 consecutive subcarriers in frequency domain and
occupies one OFDM symbol length in time domain.
11. The apparatus according to claim 9, wherein the interval
between two adjacent time-frequency resource blocks is a frequency
domain resource corresponding to an integer quantity of REGs in
frequency domain, or the interval between two adjacent
time-frequency resource blocks is a frequency domain resource
corresponding to an integer quantity of REG sets in frequency
domain.
12. The apparatus according to claim 9, wherein a frequency domain
size of the REG set is two REGs, three REGs, or six REGs that are
consecutive or adjacent in frequency domain.
13. The apparatus according to claim 9, wherein a time domain size
of the REG set is one REG, two REGs, or three REGs that are
consecutive or adjacent in time domain.
14. The apparatus according to claim 9, wherein a quantity of REGs
comprised in the REG set is predefined.
15. A computer program product comprising a non-transitory
computer-readable medium storing computer executable instructions
which, when executed by one or more processors, cause the one or
more processors to perform operations comprising: receiving
configuration information of a control channel resource set,
wherein the configuration information indicates the control channel
resource set, and wherein the configuration information indicates
at least one of a quantity of time-frequency resource blocks of the
control channel resource set or an interval between two adjacent
time-frequency resource blocks; determining the control channel
resource set based on the configuration information; and receiving
control information within the control channel resource set;
wherein the time-frequency resource block comprises six consecutive
resource element groups REGs in frequency domain, and wherein each
of the six REGs occupies 12 consecutive subcarriers in frequency
domain; or wherein the time-frequency resource block comprises at
least one resource element group REG set, wherein the REG set
comprises a plurality of REGs that are consecutive or adjacent at
least one of in time domain or in frequency domain, and wherein
each of the plurality of REGs occupies 12 consecutive subcarriers
in frequency domain and occupies one OFDM symbol length in time
domain.
16. The computer program product according to claim 15, wherein the
interval between two adjacent time-frequency resource blocks is a
frequency domain resource corresponding to an integer quantity of
REGs, or the interval between two adjacent time-frequency resource
blocks is a frequency domain resource corresponding to an integer
quantity of REG sets.
17. The method computer program product according to claim 15,
wherein the time-frequency resource block comprises at least one
REG set, wherein the REG set comprises a plurality of REGs that are
consecutive or adjacent at least one of in time domain or in
frequency domain, and wherein each of the plurality of REGs
occupies 12 consecutive subcarriers in frequency domain and
occupies one OFDM symbol length in time domain.
18. The computer program product according to claim 16, wherein the
interval between two adjacent time-frequency resource blocks is a
frequency domain resource corresponding to an integer quantity of
REGs, or the interval between two adjacent time-frequency resource
blocks is a frequency domain resource corresponding to an integer
quantity of REG sets.
19. The computer program product according to claim 16, wherein a
frequency domain size of the REG set is two REGs, three REGs, or
six REGs that are consecutive or adjacent in frequency domain.
20. The computer program product according to claim 16, wherein a
time domain size of the REG set is one REG two REGs, or three REGs
that are consecutive or adjacent in time domain.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This application is a continuation of International
Application No. PCT/CN2018/091823, filed on Jun. 19, 2018, which
claims priority to Chinese Patent Application No. 201710461711.2,
filed on Jun. 16, 2017. The disclosures of the aforementioned
applications are hereby incorporated by reference in their
entireties.
TECHNICAL FIELD
[0002] This application relates to the communications field, and
more specifically, to an information transmission method, a
terminal device, and a network device in the communications
field.
BACKGROUND
[0003] A long term evolution (long term evolution, LTE) system
standard formulated by the 3rd generation partnership project (3rd
generation partnership project, 3GPP) is considered as the 4th
generation wireless access system standard, and LTE systems are
widely deployed within a range of a frequency band that is less
than 6 GHz. However, based on distribution of dividable spectrums,
it is very likely that a carrier frequency of the 5th generation
wireless access system is higher than that of the 4th generation
wireless access system, and a to-be-selected carrier frequency
range includes 30 GHz, 60 GHz, and the like.
[0004] When a terminal device initially accesses a system, a
synchronization signal block (synchronization signal block, SS
block) needs to be detected, and the synchronization signal block
includes a synchronization signal and a broadcast channel. The
terminal device receives broadcast information that is carried on
the broadcast channel, to obtain a time-frequency resource of a
control channel. In the LTE system, the broadcast information
carries system bandwidth information, and the system bandwidth
information is used to indicate a frequency domain resource of a
control channel resource set. A new-generation wireless
communications system developed for a 5th generation (5-Generation,
5G) mobile communications technology is referred to as a new radio
(new radio, NR). The NR supports a larger bandwidth and more
services. In the 5G system, the system bandwidth information is not
included in the broadcast information, and therefore, user
equipment cannot obtain inbound bandwidth information. In addition,
it is proposed in a related technical solution that the control
channel resource set indicated by the broadcast information
occupies consecutive frequency domain resources.
SUMMARY
[0005] This application provides an information transmission
method, a terminal device, and a network device. Configuration
information of a control channel resource set is used to indicate a
time-frequency resource of a control channel, the time-frequency
resource of the control channel is inconsecutive and includes a
plurality of time-frequency resource blocks, and there is an
interval between the plurality of time-frequency resource blocks.
When receiving control information on the control channel, the
terminal device may obtain a better frequency diversity gain, to
improve transmission efficiency.
[0006] According to a first aspect, an information transmission
method is provided. The method includes: receiving, by a terminal
device, configuration information of a control channel resource
set, where the configuration information is used to indicate the
control channel resource set, and the configuration information
includes at least one of a quantity of time-frequency resource
blocks of a control channel and an interval between two adjacent
time-frequency resource blocks; determining, by the terminal
device, a time-frequency resource of the control channel based on
the configuration information; and receiving, by the terminal
device, control information on the time-frequency resource of the
control channel.
[0007] In the information transmission method provided in the first
aspect, the configuration information of the control channel
resource set is used to indicate the time-frequency resource of the
control channel, the time-frequency resource of the control channel
is inconsecutive and includes a plurality of time-frequency
resource blocks, and there is an interval between the plurality of
time-frequency resource blocks. Therefore, even if a relatively
large quantity of signal paths are generated in a channel
environment, the terminal device may obtain a better frequency
diversity gain when receiving the control information on the
control channel, to improve transmission efficiency.
[0008] In a possible implementation of the first aspect, the
time-frequency resource block includes at least one resource
element group REG set, and the REG set includes a plurality of REGs
that are consecutive or adjacent in time domain or in frequency
domain.
[0009] In a possible implementation of the first aspect, the
interval between two adjacent time-frequency resource blocks
includes, in frequency domain, a frequency domain resource
corresponding to an integer quantity of REGs or a frequency domain
resource corresponding to an integer quantity of REG sets.
[0010] In a possible implementation of the first aspect, offset
that is of a frequency domain center location of the resource set
and that is relative to a frequency domain center location of a
synchronization signal block is predefined, or is indicated by the
configuration information; and the synchronization signal block
includes the configuration information.
[0011] In a possible implementation of the first aspect, at least
one of the quantity of time-frequency resource blocks and the
interval between two adjacent time-frequency resource blocks is
predefined.
[0012] In a possible implementation of the first aspect, at least
one of a quantity of REG sets included in the time-frequency
resource block and a quantity of REGs included in the REG set is
predefined, or is indicated by the configuration information.
[0013] In a possible implementation of the first aspect, an offset
that is from the frequency domain center location of the
synchronization signal block to the frequency domain center
location of the resource set is determined based on a cell identity
in the synchronization signal block,
[0014] According to a second aspect, an information transmission
method is provided. The method includes: generating, by a network
device, configuration information of a control channel resource
set, where the configuration information is used to indicate the
control channel resource set, and the configuration information
includes at least one of a quantity of time-frequency resource
blocks of a control channel and an interval between two adjacent
time-frequency resource blocks; and sending, by the network device,
the configuration information.
[0015] In the information transmission method provided in the
second aspect, the network device uses the configuration
information of the control channel resource set to indicate the
time-frequency resource of the control channel, the time-frequency
resource of the control channel is inconsecutive and includes a
plurality of time-frequency resource blocks, and there is an
interval between the plurality of time-frequency resource blocks.
Therefore, even if a relatively large quantity of signal paths are
generated in a channel environment, a terminal device may obtain a
better frequency diversity gain when receiving the control
information on the control channel, to improve transmission
efficiency.
[0016] In a possible implementation of the second aspect, the
time-frequency resource block includes at least one resource
element group REG set, and the REG set includes a plurality of REGs
that are consecutive or adjacent in time domain or in frequency
domain.
[0017] In a possible implementation of the second aspect, the
interval between two adjacent time-frequency resource blocks
includes, in frequency domain, a frequency domain resource
corresponding to an integer quantity of REGs or a frequency domain
resource corresponding to an integer quantity of REG sets.
[0018] In a possible implementation of the second aspect, offset
that is of a frequency domain center location of the source set and
that is relative to a frequency domain center location of a
synchronization signal block is predefined, or is indicated by the
configuration information; and the synchronization signal block
includes the configuration information.
[0019] In a possible implementation of the second aspect, at least
one of the quantity of time-frequency resource blocks and the
interval between two adjacent time-frequency resource blocks is
predefined.
[0020] In a possible implementation of the second aspect, at least
one of a quantity of REG sets included in the time-frequency
resource block and a quantity of REGs included in the REG set is
predefined, or is indicated by the configuration information.
[0021] In a possible implementation of the second aspect, an offset
that is from the frequency domain center location of the
synchronization signal block to the frequency domain center
location of the resource set is determined based on a cell identity
in the synchronization signal block.
[0022] According to a third aspect, a terminal device is provided.
The terminal device includes a processor, a memory, and a
transceiver that are configured to support the terminal device in
performing a corresponding function in the foregoing method. The
processor, the memory, and the transceiver are connected. The
memory stores instructions. The transceiver, driven by the
processor, is configured to send or receive a specific signal. The
processor is configured to invoke the instructions to implement the
information transmission method in the first aspect and the various
implementations of the first aspect.
[0023] According to a fourth aspect, a terminal device is provided.
The terminal device includes a processing module, a storage module,
and a transceiver module that are configured to support the
terminal device in performing a function of the terminal device in
any one of the first aspect or the possible implementations of the
first aspect. The function may be implemented by hardware, or may
be implemented by corresponding software executed by hardware. The
hardware or software includes one or more modules corresponding to
the function.
[0024] According to a fifth aspect, a network device is provided.
The network device includes a processor, a memory, and a
transceiver that are configured to support the network device in
performing a corresponding function in the foregoing method. The
processor, the memory, and the transceiver are connected. The
memory stores instructions. The transceiver, driven by the
processor, is configured to send or receive a specific signal. The
processor is configured to invoke the instructions to implement the
information transmission method in the second aspect and the
various implementations of the second aspect.
[0025] According to a sixth aspect, a network device is provided.
The network device includes a processing module, a storage module,
and a transceiver module that are configured to support the network
device in performing a function of the network device in any one of
the second aspect or the possible implementations of the second
aspect. The function may be implemented by hardware, or may be
implemented by corresponding software executed by hardware. The
hardware or software includes one or more modules corresponding to
the function.
[0026] According to a seventh aspect, a communications system is
provided. The communications system includes the terminal device
provided in the third aspect or the fourth aspect, and the network
device provided in the fifth aspect or the sixth aspect. The
communications system may implement the information transmission
method provided in the first aspect and the second aspect.
[0027] According to an eighth aspect, a computer readable storage
medium is provided and configured to store a computer program. The
computer program includes instructions used to perform the method
in any one of the first aspect or the possible implementations of
the first aspect.
[0028] According to a ninth aspect, a computer readable storage
medium is provided and configured to store a computer program. The
computer program includes instructions used to perform the method
in any one of the second aspect or the possible implementations of
the second aspect.
BRIEF DESCRIPTION OF DRAWINGS
[0029] FIG. 1 is a schematic structural diagram of a
synchronization signal block;
[0030] FIG. 2 is a schematic diagram of a time-frequency resource
of common search space in the prior art;
[0031] FIG. 3 is a schematic diagram of a communications system
that is applicable to an information transmission method and
apparatus in this application;
[0032] FIG. 4 is a schematic flowchart of an information
transmission method according to an embodiment of this
application;
[0033] FIG. 5 is a schematic diagram of a REG according to an
embodiment of this application;
[0034] FIG. 6 is a schematic diagram of a REG according to another
embodiment of this application;
[0035] FIG. 7 is a schematic diagram of a REG set according to an
embodiment of this application;
[0036] FIG. 8 is a schematic diagram of a REG set according to
another embodiment of this application;
[0037] FIG. 9 is a schematic diagram of a REG set according to
another embodiment of this application;
[0038] FIG. 10 is a schematic diagram of a control channel resource
set according to an embodiment of this application;
[0039] FIG. 11 is a schematic diagram of frequency domain center
location offset of control channel resource sets of different cells
according to an embodiment of this application;
[0040] FIG. 12 is a schematic diagram of frequency domain offset of
control channel resource sets of different cells according to
another embodiment of this application;
[0041] FIG. 13 is a schematic flowchart of an information
transmission method according to another embodiment of this
application;
[0042] FIG. 14 is a schematic block diagram of a terminal device
according to an embodiment of this application;
[0043] FIG. 15 is a schematic block diagram of a terminal device
according to another embodiment of this application;
[0044] FIG. 16 is a schematic block diagram of a network device
according to an embodiment of this application; and
[0045] FIG. 17 is a schematic block diagram of a network device
according to another embodiment of this application.
DESCRIPTION OF EMBODIMENTS
[0046] The following describes the technical solutions of this
application with reference to accompanying drawings.
[0047] Terms such as "component", "module", and "system" used in
this specification are used to indicate computer-related entities,
hardware, firmware, combinations of hardware and software,
software, or software being executed. For example, a component may
be, but is not limited to, a process that runs on a processor, a
processor, an object, an executable tile, a thread of execution, a
program, and/or a computer. As shown in the figures, both an
application running on a computing device and the computing device
may be components. One or more components may reside within a
process and/or a thread of execution, and a component may be
located on one computer and/or distributed between two or more
computers. In addition, the components may be executed from various
computer-readable media that store various data structures. For
example, the components may communicate by using a local and/or
remote process and based on a signal having one or more data
packets (for example, data from two components interacting with
another component in a local system, a distributed system, and/or
across a network such as the Internet interacting with other
systems by using the signal).
[0048] It should be understood that the technical solutions of this
application may be applied to various communications systems, for
example, an LTE/LTE-A system, an LTE/LTE-A frequency division
duplex (frequency division duplex, FDD) system, an LTE/LTE-A time
division duplex (time division duplex, TDD) system, a universal
mobile telecommunication system (universal mobile telecommunication
system, UMTS), a worldwide interoperability for microwave access
(worldwide interoperability for microwave access, WiMAX)
communications system, a public land mobile network (public land
mobile network, PLMN) system, a device-to-device (device to device,
D2D) network system or a machine-to-machine (machine to machine,
M2M) network system, a wireless fidelity (wireless fidelity, Wi-Fi)
system, a wireless local area network (wireless local area network,
WLAN), and a future 5G communications system.
[0049] It should be further understood that, in the embodiments of
this application, a terminal device may also be referred to as user
equipment (user equipment, UE), a mobile station (mobile station,
MS), a mobile terminal (mobile terminal), or the like. The terminal
device may communicate with one or more core networks over a radio
access network (radio access network, RAN). For example, the
terminal device may include various handheld devices,
vehicle-mounted devices, wearable devices, and computing devices
that have a wireless communication function, or another processing
device connected to a wireless modem. The terminal device may also
include a subscriber unit, a cellular phone (cellular phone), a
smartphone (smart phone), a wireless data card, a personal digital
assistant (Personal Digital Assistant, PDA) computer, a tablet
computer, a wireless modem (modem), a handset (handset), a laptop
computer (laptop computer), a machine type communication (machine
type communication, MTC) terminal, a station (station, STA) in a
wireless local area network (wireless local area network, WLAN),
and the like. The terminal device may be a cellular phone, a
cordless telephone set, a session initiation protocol (Session
Initiation Protocol, SIP) phone, a wireless local loop (wireless
local loop, WLL) station, and a next-generation communications
system, for example, a terminal device in a 5G network, or a
terminal device in a future evolved public land mobile network
(Public Land Mobile Network, PLMN). This is not limited in the
embodiments of this application.
[0050] It should be further understood that a base station may also
be referred to as a network-side device or an access network
device. The network-side device may be a device that is configured
to communicate with the terminal device. The network device may be
an evolved NodeB (evolved Node B, eNB or eNodeB) in the LTE system,
a gNB in an NR, an access point, a base station transceiver, a
transmission reception point, and the like, or may be a
vehicle-mounted device, a wearable device, a network device in a
future 5G network, or a network-side device in a future evolved
PLMN system. For example, the network-side device may be an access
point (access point, AP) in a WLAN, or may be a base transceiver
station (Base Transceiver Station, BTS) in a global system for
mobile communications (global system for mobile communications,
GSM) or code division multiple access (code division multiple
access, CDMA). The network device may be an evolved NodeB (evolved
NodeB, eNB or eNodeB) in the LTE system. Alternatively, the network
device may be a NodeB (Node B) in the 3rd generation (3rd
Generation, 3G) system. In addition, the network device may be a
relay node, an access point, a vehicle-mounted device, a wearable
device, a network device in a future 5G network, a network device
in a future evolved PLMN network, or the like. This is not limited
in the embodiments of this application. For ease of description, in
all the embodiments of this application, the foregoing apparatuses
that provide a wireless communication function for an MS are
collectively referred to as a network device.
[0051] The following briefly describes the terms in the embodiments
of this application.
[0052] A symbol includes but is not limited to an orthogonal
frequency division multiplexing (orthogonal frequency division
multiplexing, OFDM) symbol, a sparse code multiple access (sparse
code multiple access, SCMA) symbol, a filtered orthogonal frequency
division multiplexing (filtered orthogonal frequency division
multiplexing, F-OFDM) symbol, a non-orthogonal multiple access
(non-orthogonal multiple access, NOMA) symbol, and the like. This
is not limited in the embodiments of this application.
[0053] A subframe is a time-frequency resource element that
includes a time-frequency resource that occupies an entire system
bandwidth in frequency domain and fixed duration in time domain,
for example, 1 ms.
[0054] A slot refers to a basic time-frequency resource element
that occupies seven consecutive symbols in time domain. This is not
limited in the embodiments of this application.
[0055] A subcarrier width is a minimum granularity in frequency
domain. For example, in the LTE system, a subcarrier width of one
subcarrier is 15 kHz; and in the 5G system, one subcarrier width
may be 15 kHz, 30 kHz, 60 kHz, or the like. This is not limited in
the embodiments of this application.
[0056] A physical resource block (physical resource block, PRB)
occupies P consecutive subcarriers in frequency domain and Q
consecutive OFDM symbols in time domain, where P and Q are natural
numbers greater than 1. For example, a physical resource block may
occupy 12 consecutive subcarriers in frequency domain and seven
consecutive OFDM symbols in time domain, where P=12 and Q=7.
Alternatively, P=12 and Q=14. This is not limited in the
embodiments of this application.
[0057] A resource element group (resource element group, REG)
occupies P consecutive subcarriers in frequency domain and Q
consecutive OFDM symbols in time domain, where P is a natural
number greater than 1. For example, a resource element group may
occupy 12 consecutive subcarriers in frequency domain and one OFDM
symbol in time domain, where P=12 and Q=1. This is not limited in
the embodiments of this application.
[0058] A control channel element (control channel element, CCE)
corresponds to a plurality of resource element groups. One control
channel element corresponds to a fixed quantity of resource element
groups, for example, six resource element groups. This is not
limited in the embodiments of this application.
[0059] When the terminal device initially accesses the system, a
synchronization signal block needs to be detected. FIG. 1 is a
structural schematic diagram of a synchronization signal block. It
can be learned from FIG. 1 that the synchronization signal block
includes a synchronization signal and a broadcast channel. The
synchronization signal includes a primary synchronization signal
(primary synchronization signal, PSS) and a secondary
synchronization signal (secondary synchronization signal, SSS). The
synchronization signal is sent in a format of a synchronization
signal sequence, and different synchronization signal sequences
correspond to different cell identities. The broadcast channel
occupies 24 PRBs, the primary synchronization signal and the
secondary synchronization signal occupy 12 PRBs, and the
synchronization signal block occupies four symbol lengths in time
domain. The terminal device receives broadcast information that is
carried on the broadcast channel, to obtain a time-frequency
resource of a control channel. The time-frequency resource of the
control channel includes at least common search space. The common
search space is a time-frequency resource on which the terminal
device receives broadcast signaling in a serving cell. The
broadcast signaling includes at least one type of control
information for scheduling paging information and control
information for indicating random access response information.
[0060] In the LTE system, the broadcast information carries system
bandwidth information, and the system bandwidth information is used
to indicate a frequency domain resource of a control channel
resource set. For example, the broadcast information includes 3-bit
information, and corresponds to {6, 15, 25, 50, 75, 100} physical
resource blocks in a system bandwidth, or corresponds to {1.4 MHz,
3 MHz, 5 MHz, 10 MHz, 15 MHz, 20 MHz} bandwidth values.
[0061] In the 5G system, the system bandwidth information is not
included in the broadcast information, and therefore, user
equipment cannot obtain inbound bandwidth information. In addition,
it is proposed in a related technical solution that the control
channel resource set indicated by the broadcast information
occupies consecutive frequency domain resources, as shown in FIG.
2. FIG. 2 is a schematic diagram of a time-frequency resource of
common search space in the prior art. In FIG. 2, a horizontal axis
is a frequency domain, and common search space (common search
space, CSS) of each cell includes a plurality of CCEs, for example,
eight CCEs. Each CCE includes six PRBs in frequency domain, and the
control channel occupies one OFDM symbol in time domain. In FIG. 2,
2, 1, 0, -1, and -2 are offsets that from a center frequency of the
broadcast information to frequency domain resources of control
channels of different cells, where a positive value and a negative
value represent offsets in opposite directions. It can be learned
from FIG. 2 that, for one cell, a frequency domain resource
occupied by a control channel is consecutive, to be specific, there
is no interval between eight CCEs. In addition, as shown in FIG. 2,
control channels of five different cells overlap partially in
frequency domain. Therefore, control information is easily
interfered by a neighboring cell. The control channel is
consecutive in frequency domain. If a relatively large quantity of
signal paths are generated in a channel environment, transmitted
control information does not easily obtain a frequency diversity
gain. Moreover, in the 5G system, the broadcast information no
longer includes the system bandwidth information. Therefore, a user
cannot acquire the time-frequency resource of the control channel.
In this way, the user cannot obtain inbound bandwidth
information.
[0062] To resolve the foregoing problem, the embodiments of this
application provide an information transmission method, and
configuration information of a synchronization signal block may be
used to notify the terminal device of a time-frequency resource of
a control channel. In addition, frequency diversity gains are
obtained as many as possible when relatively low interference to a
neighboring cell is ensured.
[0063] FIG. 3 is a schematic diagram of a communications system
that is applicable to an information transmission method and
apparatus in this application. As shown in FIG. 3, the
communications system 100 includes a network device 102. The
network device 102 may include a plurality of antennas, for
example, antennas 104, 106, 108, 110, 112, and 114. In addition,
the network device 102 may additionally include a transmitter chain
and a receiver chain. A person of ordinary skill in the art may
understand that the transmitter chain and the receiver chain may
include a plurality of components (for example, a processor, a
modulator, a multiplexer, an encoder, a demultiplexer, or an
antenna) related to signal sending and receiving.
[0064] The network device 102 may communicate with a plurality of
terminal devices (for example, a terminal device 116 and a terminal
device 122). However, it may be understood that the network device
102 may communicate with any quantity of terminal devices that are
similar to the terminal device 116 or the terminal device 122. The
terminal devices 116 and 122 may be, for example, a cellular phone,
a smartphone, a portable computer, a handheld communications
device, a handheld computing device, a satellite radio apparatus, a
global positioning system, a PDA, and/or any another suitable
device configured to perform communication in the wireless
communications system 100.
[0065] As shown in FIG. 3, the terminal device 116 communicates
with the antennas 112 and 114. The antennas 112 and 114 send
information to the terminal device 116 over a forward link 118, and
receive information from the terminal device 116 over a reverse
link 120. In addition, the terminal device 122 communicates with
the antennas 104 and 106. The antennas 104 and 106 send information
to the terminal device 122 over a forward link 124, and receive
information from the terminal device 122 over a reverse link
126.
[0066] For example, in an FDD system the forward link 118 and the
reverse link 120 may use different frequency bands, and the forward
link 124 and the reverse link 126 may use different frequency
bands.
[0067] For another example, in a TDD system and a full duplex (full
duplex) system, the forward link 118 and the reverse link 120 may
use a same frequency band, and the forward link 124 and the reverse
link 126 may use a same frequency band.
[0068] Each antenna (or an antenna group including a plurality of
antennas) and/or area that are/is designed for communication is
referred to as a sector of the network device 102. For example, the
antenna group may be designed to communicate with a terminal device
in a sector within a coverage area of the network device 102. When
the network device 102 respectively communicates with the terminal
devices 116 and 122 over the forward links 118 and 124, transmit
antennas of the network device 102 may increase signal-to-noise
ratios of the forward links 118 and 124 through beamforming. In
addition, when the network device 102 sends, through beamforming,
signals to the terminal devices 116 and 122 that are randomly
distributed in a related coverage area, interference to a mobile
device in a neighboring cell is less than that caused when a
network device sends, through a single antenna, signals to all
terminal devices that belong to the network device.
[0069] Within a given time, the network device 102, the terminal
device 116, or the terminal device 122 may be a wireless
communications sending apparatus and/or a wireless communications
receiving apparatus. When sending data, the wireless communications
sending apparatus may encode data for transmission. Specifically,
the wireless communications sending apparatus may obtain (for
example, generate, receive from another communications apparatus,
or store in a memory) a specific quantity of data bits that need to
be sent to the wireless communications receiving apparatus through
a channel. The data bits may be included in a transport block (or a
plurality of transport blocks) of data, and the transport block may
be segmented to generate a plurality of code blocks.
[0070] In addition, the communications system 100 may be a PLMN
network, a D2D network, an M2M network, or another network. FIG. 3
is merely a simplified schematic diagram of an example. The network
may further include another network device that is not shown in
FIG. 3.
[0071] With reference to FIG. 4, the following describes in detail
the information transmission method provided in this application.
FIG. 4 is a schematic flowchart of an information transmission
method 200 according to an embodiment of this application. The
method 200 may be applied to the scenario shown in FIG. 3, and
certainly may also be applied to another communications scenario.
This is not limited in the embodiments of this application.
[0072] As shown in FIG. 4, the method 200 includes the following
steps.
[0073] S210. A terminal device receives configuration information
of a control channel resource set, where the configuration
information is used to indicate the control channel resource set,
and the configuration information includes at least one of a
quantity of time-frequency resource blocks of a control channel and
an interval between two adjacent time-frequency resource
blocks.
[0074] S220. The terminal device determines a time-frequency
resource of the control channel based on the configuration
information.
[0075] S230. The terminal device receives control information on
the time-frequency resource of the control channel.
[0076] Specifically, in S210, when the terminal device initially
accesses a system, the terminal device first determines the
time-frequency resource of the control channel. After determining
the time-frequency resource of the control channel, the terminal
device receives the control information on the time-frequency
resource of the control channel. The control channel is mainly used
to transmit the control information or synchronous data, and mainly
includes one or more of common search space CSS and
terminal-device-specific search space. The common search space is a
time-frequency resource on which the terminal device receives
broadcast control information or terminal-device-specific control
information in a serving cell, and the broadcast control
information includes at least one type of control information for
scheduling paging information and control information for
indicating random access response information. The synchronization
signal block includes broadcast information and a synchronization
signal, the broadcast information includes the configuration
information of the control channel resource set, and the
synchronization signal carries a cell identity. The terminal device
receives the configuration information that is sent by a network
device and that is of the control channel resource set. The
configuration information is used to indicate the control channel
resource set, and the configuration information includes at least
one of the quantity of time-frequency resource blocks of the
control channel and the interval between two adjacent
time-frequency resource blocks. For example, when the configuration
information includes the quantity of time-frequency resource blocks
of the control channel, the interval between two adjacent
time-frequency resource blocks may be predefined by the system, or
when the configuration information includes the interval between
two adjacent time-frequency resource blocks of the control channel,
the quantity of time-frequency resource blocks of the control
channel may be predefined by the system. The time-frequency
resource of the control channel is inconsecutive and includes a
plurality of time-frequency resource blocks, and there is an
interval between the plurality of time-frequency resource blocks.
For example, the plurality of time-frequency resource blocks may
have a specific interval in frequency domain or a specific interval
in time domain.
[0077] In S220, the terminal device determines the time-frequency
resource of the control channel based on the configuration
information. To be specific, the terminal device determines the
time-frequency resource of the control channel based on the
quantity of time-frequency resource blocks and information of the
interval between two adjacent time-frequency resource blocks.
[0078] In S230, after determining the time-frequency resource of
the control channel, the terminal device receives the control
information on the time-frequency resource of the control channel,
and determines, based on the received control information, a
to-be-accessed cell and a bandwidth of the cell, to subsequently
communicate with the network device.
[0079] It should be understood that the configuration information
of the control channel resource set not only includes the quantity
of time-frequency resource blocks of the control channel and the
interval between two adjacent time-frequency resource blocks, but
also includes other information or content that is related to the
control channel resource set. This is not limited in this
embodiment of this application.
[0080] It should be further understood that the configuration
information of the control channel resource set may further include
other information of the control channel resource set, for example,
information about a frequency domain range of the control channel.
This is not limited in this embodiment of this application.
[0081] It should also be understood that the time-frequency
resource block may be a time-frequency resource block that has any
granularity and that is specified in a protocol, for example, a PRB
is used as a unit. This is not limited in this embodiment of this
application.
[0082] In the information transmission method provided in this
embodiment of this application, the configuration information of
the control channel resource set is used to indicate the
time-frequency resource of the control channel. The time-frequency
resource of the control channel is inconsecutive and includes a
plurality of time-frequency resource blocks, and there is an
interval between the plurality of time-frequency resource blocks.
Therefore, even if a relatively large quantity of signal paths are
generated in a channel environment, the terminal device may obtain
a better frequency diversity gain when receiving the control
information on the control channel, to improve transmission
efficiency.
[0083] Optionally, in an embodiment, the time-frequency resource
block includes at least one resource element group REG set, and the
REG set includes a plurality of REGs that are consecutive or
adjacent in time domain or in frequency domain,
[0084] To improve channel estimation accuracy, a plurality of REGs
that are consecutive in time domain or in frequency domain may
constitute one REG set, or a plurality of REGs that are consecutive
in time domain or in frequency domain may he bundled (bundling)
together to constitute one REG bundle (bundle). The REG set may be
referred to as the REG bundle (bundle), or may be referred to as
the REG group (group). A specific name of the REG set is not
limited in this application. Because a physical downlink control
channel (physical downlink control channel, PDCCH) is mapped to a
REG by using a CCE, a plurality of REGs corresponding to each CCE
are bundled together to constitute one or more REG sets. For each
REG set, the terminal device may perform joint channel estimation
by using a demodulation reference signal (demodulation reference
signal, DMRS) available in the REG set instead of a single REG
thereby improving channel estimation accuracy. FIG. 5 and FIG. 6
are schematic diagrams of a REG according to an embodiment of this
application. In FIG. 5, the REG includes 12 REs. Two REs are used
for a DMRS, and 10 REs are used for downlink control information
(downlink control information, DCI). In FIG. 6, four REs are used
for a DMRS, and six REs are used for DCI.
[0085] This time-frequency resource block includes at least one REG
set, and each REG set includes a plurality of REGs that is
consecutive or adjacent in time domain or in frequency domain. REGs
that are consecutive in frequency domain mean that REG numbers are
consecutive in frequency domain. To be specific, there is no
subcarrier spacing between two adjacent REGs, subcarriers of the
two adjacent REGs are consecutive, and there is no idle frequency
domain part between the two adjacent REGs. REGs that are
consecutive in time domain mean that REG numbers are consecutive in
time domain. To be specific, there is no OFDM symbol spacing
between two adjacent REGs, and OFDM symbols of the two adjacent
REGs are consecutive. REGs that are adjacent in frequency domain
mean that REG numbers are inconsecutive in frequency domain. To be
specific, there is a subcarrier spacing between two adjacent REGs,
the subcarrier spacing may be used to communicate with another
terminal device or transmit other signaling, and subcarriers of the
two adjacent REGs are inconsecutive. REGs that are adjacent in time
domain mean that REG numbers are inconsecutive in time domain. To
be specific, there is an OFDM symbol spacing between two adjacent
REGs, and OFDM symbols of the two adjacent REGs are
inconsecutive.
[0086] FIG. 7 is a schematic diagram of a REG set according to an
embodiment of this application. In FIG. 7, the REG set may have
four different formats. A REG set in a format 1 includes one REG, a
REG set in a format 2 includes two REGs that are consecutive in
frequency domain, a REG set in a format 3 includes three REGs that
are consecutive in frequency domain, and a REG set in a format 4
includes six REGs that are consecutive in frequency domain.
[0087] FIG. 8 is a schematic diagram of a REG set according to
another embodiment of this application. The REG set may have two
different formats. A REG set in a format 5 includes two REGs that
are consecutive in time domain. A REG set in a format 6 includes
six REGs in which three REGs numbered 0, 1, and 2 are consecutive
in frequency domain, three REGs numbered 7, 8, and 9 are
consecutive in frequency domain, the REGs numbered 0 and 7 are
consecutive in time domain, the REGs numbered 1 and 8 are
consecutive in time domain, and the REGs numbered 2 and 9 are
consecutive in time domain.
[0088] FIG. 9 is a schematic diagram of a REG set according to
another embodiment of this application. The REG set may have two
different formats. A REG set in a format 7 includes three REGs that
are consecutive in time domain. A REG set in a format 8 includes
six REGs in which three REGs numbered 10, 11, and 12 are
consecutive in time domain, three REGs numbered 13, 14, and 15 are
consecutive in time domain, and the REGs numbered 10 and 13 are
consecutive in frequency domain.
[0089] It should be understood that a quantity of REGs that are
consecutive or adjacent in frequency domain or in time domain may
be obtained based on the format of the REG set.
[0090] A bundling size of the REG or a bundling format of the REG
may be predefined based on the control resource set or the search
space, and therefore, are commonly known to both the terminal
device and the network device. Alternatively, the network device
may notify the terminal device of a bundling size of the REG or a
bundling format of the REG through signaling, for example, through
higher layer signaling, such as radio resource control (radio
resource control, RRC) signaling. For example, the terminal device
may be notified based on configuration information of the control
resource set or the search space.
[0091] Optionally, in an embodiment, any one of the at least one
REG set meets at least one of the following conditions: in PRBs
that are consecutive or adjacent in frequency domain, where in is a
positive integer; or n symbols that are consecutive or adjacent in
time domain, where n is a positive integer.
[0092] For example, m may be 1, 2, 3, 6, 12, or the like, or may be
2, 4, 8, or 16, and n may be 1, 2, 3, or the like.
[0093] It should be noted that adjacency in frequency domain herein
means that a plurality of RBs that are configured in the control
resource set may be inconsecutive in frequency domain, but after
the RBs are sorted in ascending order or in descending order in
frequency domain, indexes of the RBs may be consecutive. Adjacency
in time domain herein means that a plurality of RBs that are
configured in the control resource set may be inconsecutive in time
domain, but after the RBs are sorted in ascending order or in
descending order in time domain, indexes of the RBs may be
consecutive.
[0094] The time-frequency resource block includes at least one REG
set. For example, the control channel includes a plurality of REG
sets in frequency domain, there is an interval between two adjacent
REG sets in the plurality of REG sets, and the interval includes at
least one non-zero value. To be specific, for a cell, the control
channel is inconsecutive in frequency domain, and there is an
interval between the plurality of REG sets that constitute the
time-frequency resource of the control channel. A value of the
interval may be predefined, or may be configured as different
values based on different circumstances. The value of the interval
includes at least one non-zero value. If the value of the interval
is zero, it is equivalent to that the time-frequency resource of
the control channel is consecutive in frequency domain. The
interval may have a plurality of values, and the plurality of
values of the interval may be the same or different.
[0095] The following describes the information transmission method
in the embodiment of this application in detail with reference to
FIG. 10. FIG. 10 is a schematic diagram of a control channel
resource set according to an embodiment of this application. As
shown in FIG. 10, the control channel resource set includes only
one OFDM symbol in time domain, and occupies 48 REGs in an entire
frequency domain, to be specific, REGs numbered from 0 to 47.
However, the control channel is inconsecutive in frequency domain.
The control channel includes four REG sets in total in frequency
domain, and there is an interval between two adjacent REG sets, to
be specific, there are four intervals. Each interval includes six
REGs. Each REG set also includes six REGs that are consecutive in
frequency domain, to be specific, the terminal device receives
control information within the four REG sets in frequency
domain.
[0096] It should be understood that, as shown in FIG. 10, the
schematic diagram of the control channel in frequency domain is
merely a specific example of this embodiment of this application,
and should not be constructed as any limitation on this embodiment
of this application. For example, the control channel may occupy
another quantity of REGs in an entire frequency domain, the control
channel may include another quantity of REG sets in frequency
domain, and a plurality of intervals may be different. The interval
may be greater than, equal to, or less than the REG set in
frequency domain. This is not limited in this embodiment of this
application.
[0097] It should be further understood that a unit of a frequency
domain resource occupied by the control channel in frequency domain
is a REG set or a REG In this embodiment of this application, the
unit of the frequency domain resource occupied by the control
channel in frequency domain may be alternatively a PRB, a PRB set,
a CCE, or the like. This is not limited in this embodiment of this
application.
[0098] Optionally, in an embodiment, the REG set includes N REGs,
where a value of N is any one of 1, 2, 3, and a positive integer
multiple of 2 or 3.
[0099] Specifically, the REG set includes REGs, and the REG
includes one OFDM symbol in time domain and 12 subcarriers that are
consecutive in frequency domain. The REG set may include N REGs,
where a value of N is any one of 1, 2, 3, and a positive integer
multiple of 2 or 3. To be specific, the REG set may include two
REGs, three REGs, six REGs, or the like, provided that a quantity
of REGs that constitute the REG set is 1, 2, 3, or a positive
integer multiple of 2 or 3.
[0100] It should be understood that the REG set may include another
quantity of REGs. This is not limited in this embodiment of this
application.
[0101] Optionally, in an embodiment, the interval between adjacent
time-frequency resource blocks includes, in frequency domain, a
frequency domain resource corresponding to an integer quantity of
REGs or a frequency domain resource corresponding to an integer
quantity of REG sets.
[0102] Specifically, a granularity of the frequency domain interval
between adjacent time-frequency resource blocks may be a REG, to be
specific, the frequency domain interval may include a frequency
domain resource corresponding to an integer quantity of REGs. For
example, the frequency domain interval includes a frequency domain
resource corresponding to five REGs. Because the frequency domain
interval includes a plurality of different values, the frequency
domain interval may correspond to different frequency domain
resources. The frequency domain interval may be greater than, equal
to, or less than one REG set in frequency domain.
[0103] It should be understood that the granularity of the
frequency domain interval may be alternatively a frequency domain
size occupied by a PRB or another frequency domain unit. This is
not limited in this embodiment of this application.
[0104] Optionally, in an embodiment, the interval between adjacent
time-frequency resource blocks includes, in frequency domain, a
frequency domain resource corresponding to an integer quantity of
REG sets.
[0105] Specifically, a granularity of the frequency domain interval
between adjacent time-frequency resource blocks may be a REG set,
to be specific, the frequency domain interval may include a
frequency domain resource corresponding to an integer quantity of
REG sets. For example, the frequency domain interval is a frequency
domain resource corresponding to five REG sets. When the frequency
domain interval is a frequency domain resource corresponding to one
REG set, the frequency domain interval is the same as the REG set
in frequency domain, as shown in a control channel resource in FIG.
5.
[0106] It should be understood that the granularity of the
frequency domain interval may be alternatively a PRB set or another
frequency domain unit set. This is not limited in this embodiment
of this application.
[0107] Optionally, in an embodiment, the terminal device determines
inbound bandwidth information of the terminal device based on the
interval between adjacent time-frequency resource blocks and/or at
least one REG set.
[0108] Specifically, the information about a bandwidth through
which the terminal device accesses the system may be determined by
using a frequency domain resource of the control channel. Because
the control channel has an interval in frequency domain, the
information may be determined by using the interval and the at
least one time-frequency resource blocks. The schematic diagram of
the control channel in frequency domain, as shown in FIG. 10, is
used as an example for descriptions. In FIG. 10, the interval
between two adjacent time-frequency resource blocks is six REGs, in
other words, the interval is a frequency domain corresponding to
the six REGs. In four time-frequency resource blocks, each
time-frequency resource block includes 11 REGs. In other words,
there are four intervals and four time-frequency resource blocks.
Therefore, the inbound bandwidth of the terminal device is
4.times.6+4.times.6=48, to be specific, the bandwidth through which
the terminal device accesses the system is a bandwidth value that
corresponds to 48 REGs.
[0109] Alternatively, the terminal device determines, based on the
interval, the information about a bandwidth through which the
terminal device accesses the system. For example, the terminal
device determines, based on predefinition, that K times a frequency
domain resource corresponding to the interval is the bandwidth
through which the terminal device accesses the system. For another
example, the terminal device may determine, according to an
equation that is related to a frequency domain resource
corresponding to the interval, the information about the bandwidth
through which the terminal device accesses the system. This is not
limited in this embodiment of this application. Similarly, when the
terminal device determines, based on at least one time-frequency
resource block, the information about the bandwidth through which
the terminal device accesses the system, the terminal device may
determine, based on predefinition, that K times a frequency domain
resource corresponding to the at least one time-frequency resource
block is the bandwidth through which the terminal device accesses
the system. For another example, the terminal device may determine,
according to an equation that is related to a frequency domain
resource corresponding to the at least one time-frequency resource
block, the information about the bandwidth through which the
terminal device accesses the system. This is not limited in this
embodiment of this application.
[0110] Optionally, in an embodiment, an offset that is from a
frequency domain center location of a synchronization signal block
to a frequency domain center location of the resource set is
predefined, or is indicated by the configuration information; and
the synchronization signal block includes the configuration
information.
[0111] Specifically, because control channels of different cells
may overlap partially in frequency domain, to be specific, the
control channels of the different cells may have an overlapping
part in frequency domain. Therefore, the different cells are easily
interfered by neighboring cells when receiving control information
on respective control channels. In this embodiment of this
application, a frequency domain center location of a control
channel of each cell has offset relative to the frequency domain
center location of the broadcast information, and different cells
have different offsets. To be specific, the frequency domain center
location of the resource set has offset relative to the frequency
domain center location of the synchronization signal block, and an
offset corresponds to a cell identity. The synchronization signal
block includes broadcast information and a synchronization signal,
the broadcast information includes the configuration information of
the control channel resource set, and the synchronization signal
carries a cell identity. To be specific, the terminal device
determines the offset based on the cell identity in the
synchronization signal, to determine the time-frequency resource of
the control channel. The cell identity is carried on the
synchronization signal block sent by the network device. The offset
that is from the frequency domain center location of the
synchronization signal block to the frequency domain center
location of the resource set is determined based on the cell
identity in the synchronization signal block. In this way, control
channels of different cells do not overlap or have a smaller
overlapping part in frequency domain, to reduce interference
suffered by the different cells from neighboring cells when control
information is received on the respective control channels in the
different cells. The offset may be predefined by the system, to be
specific, specified in a protocol; or may be indicated by the
configuration information. This is not limited in this embodiment
of this application.
[0112] Optionally, a quantity of offsets that is between the
frequency domain center location of the control channel resource
set and the frequency domain center location of the synchronization
signal block may be determined based on the time-frequency resource
block and the interval between two adjacent time-frequency resource
blocks.
[0113] The inbound bandwidth of the terminal device is determined
based on the time-frequency resource block and the interval between
two adjacent time-frequency resource blocks, and a quantity of
frequency offsets of the control channel resource set may be
derived based on the inbound bandwidth.
[0114] Specifically, in an implementable method, as shown in FIG.
11, a bandwidth occupied by a control channel resource set of a
cell 1 is 20 MHz, and corresponds to four pieces of time domain
offset. A bandwidth occupied by a control channel resource set of a
cell 2 is 10 MHz, and corresponds to two pieces of time domain
offset.
[0115] FIG. 11 is a schematic diagram of frequency domain offset of
control channel resource sets of different cells according to an
embodiment of this application. In FIG. 11, the bandwidth occupied
by the control channel resource set of the cell 1 is 20 MHz, and
the bandwidth occupied by the control channel resource set of the
cell 2 is 10 MHz. The control channel resource set of the cell 1
and the control channel resource set of the cell 2 are
inconsecutive in frequency domain. A frequency domain center of the
control channel resource set of the cell 1 and a frequency domain
center of the control channel resource set of the cell 2 have
different offsets relative to a frequency domain center location of
the synchronization signal block. Offset that is of the frequency
domain center of the control channel resource set of the cell 1 and
that is relative to the frequency domain center location of the
synchronization signal block is one REG set to the left in
frequency domain. Offset that is of the frequency domain center of
the control channel resource set of the cell 2 and that is relative
to the frequency domain center location of the synchronization
signal block is one REG set to the right in frequency domain. After
the offsetting, the control channel resource set of the cell 1 and
the control channel resource set of the cell 2 have a smaller
overlapping part or do not overlap in frequency domain. This may
reduce interference suffered by different cells from neighboring
cells when control information is received on respective control
channel resource sets in the different cells.
[0116] FIG. 12 is a schematic diagram of frequency domain offset of
control channel resource sets of different cells according to
another embodiment of this application. In FIG. 12, a control
channel resource set of a cell 1 is also inconsecutive in frequency
domain and has an interval. Therefore, a cell 2 may be configured
to receive control information on a frequency domain interval part
of the control channel resource set of the cell 1, to be specific,
the frequency domain interval part of the control channel resource
set of the cell 1 is a frequency domain part of a control channel
resource set of the cell 2. In this way, the control channel
resource set of the cell 1 and the control channel resource set of
the cell 2 do not overlap in frequency domain, to reduce
interference suffered by different cells front neighboring cells
when control information is received on respective control channel
resource sets in the different cells.
[0117] It should be understood that FIG. 11 and FIG. 12 show an
example in which the control channel resource sets of the two cells
do not overlap in frequency domain, to illustrate that control
channels of different cells do not overlap in frequency domain.
However, this embodiment of this application is not limited
thereto. For example, control channels of more cells may not
overlap in frequency domain, to be specific, different offsets
exist relative to the frequency domain center location of the
broadcast information. This is not limited in this embodiment of
this application.
[0118] In the information transmission method provided in this
embodiment of this application, a control channel of a cell is
inconsecutive in an entire frequency domain and has a frequency
domain interval. The terminal device receives control information
from the control channel of this format, and may also obtain a
better frequency diversity gain, to improve transmission
efficiency. However, frequency domain center locations of control
channels of different cells have different offsets relative to the
frequency domain center location of the control channel resource
set, to be specific, the control channels of the different cells do
not overlap in frequency domain, to reduce interference suffered by
the different cells from neighboring cells when control information
is received on the respective control channels in the different
cells. In addition, the configuration information of the control
channel resource set is used to indicate the time-frequency
resource of the control channel, to be specific, determine the
frequency domain resource of the control channel, to resolve a
problem that the time-frequency resource of the control channel
cannot be indicated in 5G.
[0119] It should be understood that at least one of the quantity of
time-frequency resource blocks and the interval between two
adjacent time-frequency resource blocks is predefined.
[0120] Specifically, the quantity of time-frequency resource blocks
included in the control channel may be predefined in a protocol.
When the quantity of time-frequency resource blocks included in the
control channel is predefined in a protocol, the terminal device
may not be notified of the quantity through signaling. Therefore,
signaling overheads can be reduced. Alternatively, the quantity of
time-frequency resource blocks included in the control channel may
be configured by the network device. When the quantity of
time-frequency resource blocks is configured by the network device,
different quantities of time-frequency resource blocks may be
configured, and the configuration information is used to indicate a
specific quantity of time-frequency resource blocks to the terminal
device. This can provide flexibility of resource configuration, and
improve spectrum utilization.
[0121] Similarly, the interval between two adjacent time-frequency
resource blocks may be predefined in a protocol, or may be
configured by the network device and indicated to the terminal
device by using the configuration information. This is not limited
in this embodiment of this application.
[0122] It should be understood that at least one of a quantity of
REG sets included in the time-frequency resource block and a
quantity of REGs included in the REG set is predefined, or is
indicated by the configuration information.
[0123] Specifically, the quantity of REG sets included in the
time-frequency resource block may be predefined in a protocol, or
may be configured by the network device and indicated to the
terminal device by using the configuration information. The
quantity of REGs included in the REG set may also be predefined in
a protocol, or may be configured by the network device and
indicated to the terminal device by using the configuration
information. This is not limited in this embodiment of this
application.
[0124] An embodiment of this application further provides an
information transmission method 300. The method 300 may be executed
by a network device. FIG. 13 is a schematic flowchart of an
information transmission method 300 according to an embodiment of
this application. As shown in FIG. 13, the method 300 includes the
following steps.
[0125] S310. The network device generates configuration information
of a control channel resource set, where the configuration
information is used to indicate the control channel resource set,
and the configuration information includes at least one of a
quantity of time-frequency resource blocks of a control channel and
an interval between two adjacent time-frequency resource
blocks.
[0126] S320. The network device sends the configuration
information.
[0127] Specifically, when the terminal device initially accesses a
system, the network device notifies a terminal device of the
time-frequency resource of the control channel, and the terminal
device receives the control information on the time-frequency
resource. The control channel is mainly used to transmit signaling
or synchronous data. In a 5G system, broadcast information no
longer includes system bandwidth information. Therefore, in S310,
the network device generates the configuration information of the
control channel resource set, and the configuration information is
used to indicate the control channel resource set. The control
channel includes common search space CSS, a broadcast channel, and
a dedicated control channel. The configuration information includes
at least one of the quantity of time-frequency resource blocks of
the control channel and the interval between two adjacent
time-frequency resource blocks. For example, when the configuration
information includes the quantity of time-frequency resource blocks
of the control channel, the interval between two adjacent
time-frequency resource blocks may be predefined by the system.
When the configuration information includes the interval between
two adjacent time-frequency resource blocks of the control channel,
the quantity of time-frequency resource blocks of the control
channel may be predefined by the system. The time-frequency
resource of the control channel is inconsecutive and includes a
plurality of time-frequency resource blocks, and there is an
interval between the plurality of time-frequency resource blocks.
For example, the plurality of time-frequency resource blocks may
have a specific interval in frequency domain or a specific interval
in time domain. After generating the configuration information of
the control channel resource set, the network device sends the
configuration information to the terminal device. After determining
the time-frequency resource of the control channel, the terminal
device receives the control information on the time-frequency
resource of the control channel, and determines, based on the
received control information, a to-be-accessed cell and a bandwidth
of the cell, to subsequently communicate with the network
device.
[0128] In the information transmission method provided in this
embodiment of this application, the network device uses the
configuration information of the control channel resource set to
indicate the time-frequency resource of the control channel, the
time-frequency resource of the control channel is inconsecutive and
includes a plurality of time-frequency resource blocks, and there
is an interval between the plurality of time-frequency resource
blocks. Therefore, even if a relatively large quantity of signal
paths are generated in a channel environment, the terminal device
may obtain a better frequency diversity gain when receiving the
control information on the control channel, to improve transmission
efficiency.
[0129] Optionally, in an embodiment, the time-frequency resource
block includes at least one resource element group REG set, and the
REG set includes a plurality of REGs that are consecutive or
adjacent in time domain or in frequency domain.
[0130] Specifically, the time-frequency resource block includes at
least one REG set, and each REG set includes a plurality of REGs
that is consecutive or adjacent in time domain or in frequency
domain. REGs that are consecutive in frequency domain mean that REG
numbers are consecutive in frequency domain. To be specific, there
is no subcarrier spacing between two adjacent REGs, subcarriers of
the two adjacent REGs are consecutive, and there is no idle
frequency domain part between the two adjacent REGs. REGs that are
consecutive in time domain mean that REG numbers are consecutive in
time domain. To be specific, there is no OFDM symbol spacing
between two adjacent REGs, OFDM symbols of the two adjacent REGs
are consecutive, and there is no idle time domain part between the
two adjacent REGs. REGs that are adjacent in frequency domain mean
that REG numbers are inconsecutive in frequency domain. To be
specific, there is a subcarrier spacing between two adjacent REGs,
the subcarrier spacing may be used to communicate with another
terminal device or transmit other signaling, and subcarriers of the
two adjacent REGs are inconsecutive. REGs that are adjacent in time
domain mean that REG numbers are inconsecutive in time domain. To
be specific, there is an OFDM symbol spacing between two adjacent
REGs, and OFDM symbols of the two adjacent REGs are inconsecutive.
The time-frequency resource block includes at least one resource
element group REG set. For example, the control channel includes a
plurality of REG sets in frequency domain, there is an interval
between two adjacent REG sets in the plurality of REG sets, and the
interval includes at least one non-zero value. To be specific, for
a cell, the control channel is inconsecutive in frequency domain,
and there is an interval between the plurality of REG sets that
constitute the time-frequency resource of the control channel. A
value of the interval may be set according to a system protocol, or
may be configured as different values based on different
circumstances. The value of the interval includes at least one
non-zero value. If the value of the interval is zero, it is
equivalent to that the time-frequency resource of the control
channel is consecutive in frequency domain. The interval may have a
plurality of values, and the plurality of values of the interval
may be the same or different.
[0131] It should be understood that the time-frequency resource
block may alternatively include at least one PRB set, and the PRB
set includes a plurality of PRBs that are consecutive or adjacent
in time domain or in frequency domain. This is not limited in this
embodiment of this application.
[0132] Optionally, in an embodiment, the REG set includes N REGs,
where a value of N is any one of 1, 2, 3, and a positive integer
multiple of 2 or 3.
[0133] Specifically, the REG set includes REGs, and the REG
includes one OFDM symbol in time domain and 12 subcarriers that are
consecutive in frequency domain. The REG set may include N REGs,
where a value of N is any one of 1, 2, 3, and a positive integer
multiple of 2 or 3. To be specific, the REG set may include two
REGs, three REGs, six REGs, or the like, provided that a quantity
of REGs that constitute the REG set is 1, 2, 3, or a positive
integer multiple of 2 or 3. Optionally, in an embodiment, the
interval between adjacent time-frequency resource blocks includes,
in frequency domain, a frequency domain resource corresponding to
an integer quantity of REGs or a frequency domain resource
corresponding to an integer quantity of REG sets.
[0134] Optionally, in an embodiment, the interval between adjacent
time-frequency resource blocks includes, in frequency domain, a
frequency domain resource corresponding to an integer quantity of
REGs or a frequency domain resource corresponding to an integer
quantity of REG sets.
[0135] Specifically, a granularity of the interval between adjacent
time-frequency resource blocks may be a REG, to be specific, a
frequency domain interval may include an integer quantity of REGs.
For example, the frequency domain interval is a frequency domain
resource corresponding to five REGs. Because the frequency domain
interval includes a plurality of different values, the frequency
domain interval may correspond to different frequency domain
resources. The interval may be greater than, equal to, or less than
one REG set in frequency domain.
[0136] It should be understood that the granularity of the
frequency domain interval may be alternatively a PRB or another
frequency domain unit. This is not limited in this embodiment of
this application.
[0137] Optionally, in an embodiment, the interval between adjacent
time-frequency resource blocks includes, in frequency domain, a
frequency domain resource corresponding to an integer quantity of
REG sets.
[0138] Specifically, a granularity of the frequency domain interval
between adjacent time-frequency resource blocks may be a REG set,
to be specific, the frequency domain interval may include a
frequency domain resource corresponding to an integer quantity of
REG sets. For example, the frequency domain interval is a frequency
domain resource corresponding to five REG sets. When the frequency
domain interval is a frequency domain resource corresponding to one
REG set, the interval is the same as the REG set in frequency
domain, as shown in a control channel frequency domain resource in
FIG. 5.
[0139] It should be understood that the granularity of the
frequency domain interval may be alternatively a PRB set or another
frequency domain unit set. This is not limited in this embodiment
of this application.
[0140] Optionally, in an embodiment, an offset that is between a
frequency domain center location of the resource set and a
frequency domain center location of a synchronization signal block
is predefined, or is indicated by the configuration information;
and the synchronization signal block includes the configuration
information.
[0141] Specifically, because control channels of different cells
may overlap partially in frequency domain, to be specific, the
control channels of the different cells may have an overlapping
part in frequency domain. Therefore, the different cells are easily
interfered by neighboring cells when receiving control information
on respective control channels. In this embodiment of this
application, a frequency domain center location of a control
channel of each cell has offset relative to the frequency domain
center location of the broadcast information, and different cells
have different offsets. To be specific, the frequency domain center
location of the resource set has offset relative to the frequency
domain center location of the synchronization signal block, and an
offset corresponds to a cell identity. The synchronization signal
block includes broadcast information and a synchronization signal,
the broadcast information includes the configuration information of
the control channel resource set, and the synchronization signal
carries a cell identity. To be specific, the terminal device
determines the offset based on the cell identity in the
synchronization signal block. The offset that is from the frequency
domain center location of the synchronization signal block to the
frequency domain center location of the resource set is determined
based on the cell identity in the synchronization signal block. In
this way, control channels of different cells do not overlap or
have a smaller overlapping part in frequency domain, to reduce
interference suffered by the different cells from neighboring cells
when control information is received on the respective control
channels in the different cells. The offset may be predefined by
the system, to be specific, specified in a protocol; or may be
indicated by the configuration information. This is not limited in
this embodiment of this application.
[0142] It should be understood that at least one of the quantity of
time-frequency resource blocks and the interval between two
adjacent time-frequency resource blocks is predefined.
[0143] Specifically, the quantity of time-frequency resource blocks
included in the control channel may be predefined in a protocol.
When the quantity of time-frequency resource blocks included in the
control channel is predefined in a protocol, the terminal device
may not be notified of the quantity through signaling. Therefore,
signaling overheads can be reduced. Alternatively, the quantity of
time-frequency resource blocks included in the control channel may
be configured by the network device. When the quantity of
time-frequency resource blocks is configured by the network device,
different quantities of time-frequency resource blocks may be
configured, and the configuration information is used to indicate a
specific quantity of time-frequency resource blocks to the terminal
device. This can provide flexibility of resource configuration, and
improve spectrum utilization.
[0144] The interval between two adjacent time-frequency resource
blocks may be predefined in a protocol, or may be configured by the
network device and indicated to the terminal device by using the
configuration information. This is not limited in this embodiment
of this application.
[0145] It should be understood that at least one of a quantity of
REG sets included in the time-frequency resource block and a
quantity of REGs included in the REG set is predefined, or is
indicated by the configuration information.
[0146] It should be further understood that sequence numbers of the
foregoing processes do not mean execution sequences in the
embodiments of this application. The execution sequences of the
processes should be determined based on functions and internal
logic of the processes, and should not be constructed as any
limitation on the implementation processes of the embodiments of
this application.
[0147] Specifically, the quantity of REG sets included in the
time-frequency resource block may be predefined in a protocol, or
may be configured by the network device and indicated to the
terminal device by using the configuration information. The
quantity of REGs included in the REG set may also be predefined in
a protocol, or may be configured by the network device and
indicated to the terminal device by using the configuration
information. This is not limited in this embodiment of this
application.
[0148] In the information transmission method provided in this
embodiment of this application, a control channel of a cell is
inconsecutive in an entire frequency domain and has a frequency
domain interval. The network device sends control information on
the control channel of this format, and may also obtain a better
frequency diversity gain, to improve transmission efficiency.
However, frequency domain center locations of control channels of
different cells have different offsets relative to the frequency
domain center location of the control channel resource set, to be
specific, the control channels of the different cells do not
overlap in frequency domain, to reduce interference suffered by the
different cells from neighboring cells when control information is
received on the respective control channels in the different cells.
In addition, the configuration information of the control channel
resource set is used to indicate the time-frequency resource of the
control channel, to be specific, determine the frequency domain
resource of the control channel, to resolve a problem that the
time-frequency resource of the control channel cannot he indicated
in 5G.
[0149] The foregoing describes the information transmission method
in the embodiments of this application in detail with reference to
FIG. 1 to FIG. 13. The following describes the terminal device and
the network device in the embodiments of this application in detail
with reference to FIG. 14 to FIG. 17.
[0150] FIG. 14 is a schematic block diagram of a terminal device
according to an embodiment of this application. It should be
understood that an embodiment of the terminal device and a method
embodiment correspond to each other. For similar descriptions,
refer to the method embodiment. A terminal device 400 shown in FIG.
14 may be configured to perform steps corresponding to the terminal
device in FIG. 4. The terminal device 400 includes a processor 410,
a memory 420, and a transceiver 430. The processor 410, the memory
420, and the transceiver 430 are connected. The memory 420 stores
instructions. The processor 410 is configured to execute the
instructions stored in the memory 420. The transceiver 430, driven
by the processor 410, is configured to send or receive a specific
signal.
[0151] The transceiver 430 is configured to receive configuration
information of a control channel resource set, where the
configuration information is used to indicate the control channel
resource set, and the configuration information includes at least
one of a quantity of time-frequency resource blocks of a control
channel and an interval between two adjacent time-frequency
resource blocks.
[0152] The processor 410 is configured to determine a
time-frequency resource of the control channel based on the
configuration information.
[0153] The transceiver 430 is further configured to receive control
information on the time-frequency resource of the control
channel.
[0154] The terminal device provided in this embodiment of this
application learns of the time-frequency resource of the control
channel based on the configuration information of the control
channel resource set. The time-frequency resource of the control
channel is inconsecutive and includes a plurality of time-frequency
resource blocks, and there is an interval between the plurality of
time-frequency resource blocks. Therefore, even if a relatively
large quantity of signal paths are generated in a channel
environment, the terminal device may obtain a better frequency
diversity gain when receiving the control information on the
control channel, to improve transmission efficiency.
[0155] The components in the terminal device 400 are connected. To
be specific, the processor 410, the memory 420, and the transceiver
430 communicate with each other through an inner connection path,
to transmit a control signal and/or a data signal. The foregoing
method embodiments in this application may be applied to the
processor, or the processor implements the steps in the foregoing
method embodiments. The processor may be an integrated circuit chip
and has a signal processing capability. In an implementation
process, the steps in the foregoing method embodiments can be
implemented by using a hardware integrated logical circuit in the
processor, or by using instructions in a form of software. The
processor may be a central processing unit (central processing
unit, CPU), a network processor (network processor, NP), a
combination of a CPU and an NP, a digital signal processor (digital
signal processor, DSP), an application-specific integrated circuit
(application specific integrated circuit, ASIC), a field
programmable gate array (field programmable gate array, FPGA) or
another programmable logic device, a discrete gate, a transistor
logic device, or a discrete hardware component. The processor may
implement or perform the methods, steps, and logical block diagrams
that are disclosed in this application. The general-purpose
processor may be a microprocessor, or the processor may be any
conventional processor or the like. The steps of the methods
disclosed with reference to this application may be directly
executed and accomplished by a hardware decoding processor, or be
executed and accomplished by using a combination of hardware and
software modules in a decoding processor. A software module may be
located in a mature storage medium in the art, such as a random
access memory, a flash memory, a read-only memory, a programmable
read-only memory, an electrically erasable programmable memory, or
a register. The storage medium is located in the memory, and the
processor reads information in the memory and implements the steps
in the foregoing methods in combination with hardware of the
processor.
[0156] Optionally, in another embodiment of this application, the
time-frequency resource block includes at least one resource
element group REG set, and the REG set includes a plurality of REGs
that are consecutive or adjacent in time domain or in frequency
domain.
[0157] Optionally, in another embodiment of this application, the
interval between two adjacent time-frequency resource blocks
includes, in frequency domain, a frequency domain resource
corresponding to an integer quantity of REGs or a frequency domain
resource corresponding to an integer quantity of REG sets.
[0158] Optionally, in another embodiment of this application,
offset that is of a frequency domain center location of the
resource set and that is relative to a frequency domain center
location of a synchronization signal block is predefined, or is
indicated by the configuration information; and the synchronization
signal block includes the configuration information.
[0159] Optionally, in another embodiment of this application, at
least one of the quantity of time-frequency resource blocks and the
interval between two adjacent time-frequency resource blocks is
predefined.
[0160] Optionally, in another embodiment of this application, at
least one of a quantity of REG sets included in the time-frequency
resource block and a quantity of REGs included in the REG set is
predefined, or is indicated by the configuration information.
[0161] Optionally,in another embodiment of this application, the
processor 410 is further configured to determine an offset based on
a cell identity in the synchronization signal block.
[0162] In the terminal device provided in this embodiment of this
application, the control channel for receiving the control
information is inconsecutive in an entire frequency domain, and has
a frequency domain interval. The terminal device receives the
control information on the control channel of this format, and may
also obtain a better frequency diversity gain, to improve
transmission efficiency. Frequency domain center locations of
control channels of different cells have different offsets relative
to the frequency domain center location of the control channel
resource set. Control channels of the terminal device in different
cells do not overlap in frequency domain, to reduce interference
suffered by the terminal device from a neighboring cell when the
terminal device receives control information on the respective
control channels in the different cells.
[0163] It should be noted that, in this embodiment of this
application, the processor 410 may be implemented by a processing
module, the memory 420 may be implemented by a storage module, and
the transceiver 430 may be implemented by a transceiver module. As
shown in FIG. 10, a terminal device 500 may include a processing
module 510, a storage module 520, and a transceiver module 530.
[0164] The terminal device 400 shown in FIG. 14 or the terminal
device 500 shown in FIG. 15 can implement the steps performed by
the terminal device in FIG. 4. To avoid repetition, details are not
described herein again.
[0165] FIG. 16 is a schematic block diagram of a network device 600
according to an embodiment of this application. It should be
understood that an embodiment of the network device and a method
embodiment correspond to each other. For similar descriptions,
refer to the method embodiment. As shown in FIG. 16, the network
device 600 includes a processor 610, a memory 620, and a
transceiver 630. The processor 610, the memory 620, and the
transceiver 630 are connected. The memory 620 stores instructions.
The processor 610 is configured to execute the instructions stored
in the memory 620. The transceiver 630, driven by the processor
610, is configured to send or receive a specific signal.
[0166] The transceiver 610 is configured to generate configuration
information of a control channel resource set, where the
configuration information is used to indicate the control channel
resource set, and the configuration information includes at least
one of a quantity of time-frequency resource blocks of a control
channel and an interval between two adjacent time-frequency
resource blocks.
[0167] The transceiver 620 is configured to send the configuration
information.
[0168] This embodiment of this application provides the network
device. The network device uses the configuration information of
the control channel resource set to indicate the time-frequency
resource of the control channel. The time-frequency resource of the
control channel is inconsecutive and includes a plurality of
time-frequency resource blocks, and there is an interval between
the plurality of time-frequency resource blocks. Therefore, even if
a relatively large quantity of signal paths are generated in a
channel environment, a terminal device may obtain a better
frequency diversity gain when receiving the control information on
the control channel, to improve transmission efficiency.
[0169] The components in the network device 600 are connected. To
be specific, the processor 610, the memory 620, and the transceiver
630 communicate with each other through an inner connection path,
to transmit a control signal and/or a data signal. It should be
noted that the foregoing method embodiments in this application may
be applied to the processor, or the processor implements the steps
in the foregoing method embodiments. The processor may be an
integrated circuit chip and has a signal processing capability. In
an implementation process, the steps in the foregoing method
embodiments can be implemented by using a hardware integrated
logical circuit in the processor, or by using instructions in a
form of software. The processor may be a central processing unit
CPU, an NP, a combination of a CPU and an NP, a DSP, an ASIC, an
FPGA or another programmable logic device, a discrete gate or a
transistor logic device, or a discrete hardware component. The
processor may implement or perform the methods, steps, and logical
block diagrams that are disclosed in this application. The
general-purpose processor may be a microprocessor, or the processor
may be any conventional processor or the like. The steps of the
methods disclosed with reference to this application may be
directly executed and accomplished by a hardware decoding
processor, or be executed and accomplished by using a combination
of hardware and software modules in a decoding processor. A
software module may be located in a mature storage medium in the
art, such as a random access memory, a flash memory, a read-only
memory, a programmable read-only memory, an electrically erasable
programmable memory, or a register. The storage medium is located
in the memory, and the processor reads information in the memory
and implements the steps in the foregoing methods in combination
with hardware of the processor.
[0170] Optionally, in another embodiment of this application, the
time-frequency resource block includes at least one resource
element group REG set, and the REG set includes a plurality of REGs
that are consecutive or adjacent in time domain or in frequency
domain.
[0171] Optionally, in another embodiment of this application, the
interval between two adjacent time-frequency resource blocks
includes, in frequency domain, a frequency domain resource
corresponding to an integer quantity of REGs or a frequency domain
resource corresponding to an integer quantity of REG sets.
[0172] Optionally, in another embodiment of this application,
offset that is of a frequency domain center location of the
resource set and that is relative to a frequency domain center
location of a synchronization signal block is predefined, or is
indicated by the configuration information; and the synchronization
signal block includes the configuration information.
[0173] Optionally, in another embodiment of this application, at
least one of the quantity of time-frequency resource blocks and the
interval between two adjacent time-frequency resource blocks is
predefined.
[0174] Optionally, in another embodiment of this application, at
least one of a quantity of REG sets included in the time-frequency
resource block and a quantity of REGs included in the REG set is
predefined, or is indicated by the configuration information.
[0175] In the network device provided in this embodiment of this
application, the provided control channel is inconsecutive in an
entire frequency domain, and has a frequency domain interval. The
network device sends the control information on the control channel
of this format, and may also obtain a better frequency diversity
gain, to improve transmission efficiency. However, frequency domain
center locations of control channels of different cells have
different offsets relative to the frequency domain center location
of the control channel resource set, to be specific, control
channels of different cells do not overlap in frequency domain, to
reduce interference suffered by the different cells from
neighboring cells when control information is received on the
respective control channels in the different cells. In addition,
the configuration information of the control channel resource set
is used to indicate the time-frequency resource of the control
channel, to resolve a problem that the time-frequency resource of
the control channel cannot be indicated in 5G.
[0176] It should be noted that, in this embodiment of the present
invention, the processor 610 may be implemented by a processing
module, the memory 620 may be implemented by a storage module, and
the transceiver 630 may be implemented by a transceiver module. As
shown in FIG. 12, a network device 700 may include a processing
module 710, a storage module 720, and a transceiver module 730.
[0177] The network device 600 shown in FIG. 16 or the network
device 700 shown in FIG. 17 can implement the steps performed by
the network device in FIG. 13. To avoid repetition, details are not
described herein again.
[0178] An embodiment of this application further provides a
computer readable medium, configured to store computer program
code. The computer program includes instructions used to execute
the information transmission method according to the embodiments of
this application in FIG. 4 and FIG. 8. The readable medium may be a
read-only memory (read-only memory, ROM) or a random access memory
(random access memory, RAM). This is not limited in this embodiment
of this application.
[0179] An embodiment of this application further provides a
communications system. The communications system includes the
terminal device provided in the foregoing embodiments of this
application and the network device provided in the foregoing
embodiments of this application. The communications system may
implement any information transmission method provided in the
embodiments of this application.
[0180] It should be understood that the terms "and/or" and "at
least one of A or B" in this specification describe only an
association relationship for describing associated objects and
represents that three relationships may exist. For example, A
and/or B may represent the following three cases: Only A exists,
both A and B exist, and only B exists. In addition, the character
"/" in this specification generally indicates an "or" relationship
between the associated objects.
[0181] A person of ordinary skill in the art may be aware that, in
combination with the examples described in the embodiments
disclosed in this specification, units and algorithm steps may be
implemented by electronic hardware or a combination of computer
software and electronic hardware. Whether the functions are
performed by hardware or software depends on particular
applications and design constraint conditions of the technical
solutions. A person skilled in the art may use different methods to
implement the described functions for each particular application,
but it should not be considered that the implementation goes beyond
the scope of this application.
[0182] It may be clearly understood by a person skilled in the art
that, for the purpose of convenient and brief description, for a
detailed working process of the foregoing system, apparatus, and
unit, reference may be made to a corresponding process in the
foregoing method embodiments. Details are not described herein
again.
[0183] In the several embodiments provided in this application, it
should be understood that the disclosed system, apparatus, and
method may be implemented in other manners. For example, the
described apparatus embodiment is merely an example. For example,
the unit division is merely logical function division and may be
other division in actual implementation. For example, a plurality
of units or components may be combined or integrated into another
system, or some features may be ignored or not performed. In
addition, the displayed or discussed mutual couplings or direct
couplings or communication connections may be implemented through
some interfaces. The indirect couplings or communication
connections between the apparatuses or units may be implemented in
electronic, mechanical, or other forms.
[0184] The units described as separate parts may or may not be
physically separate, and parts displayed as units may or may not be
physical units, may be located in one position, or may be
distributed on a plurality of network units. Some or all of the
units may be selected based on actual requirements to achieve the
objectives of the solutions of the embodiments.
[0185] In addition, functional units in the embodiments of this
application may be integrated into one processing unit, or each of
the units may exist alone physically, or two or more units are
integrated into one unit.
[0186] When the functions are implemented in the form of a software
function unit and sold or used as an independent product, the
functions may be stored in a computer-readable storage medium.
Based on such an understanding, the technical solutions of this
application essentially, or the part contributing to the prior art,
or some of the technical solutions may be implemented in a form of
a software product. The computer software product is stored in a
storage medium, and includes several instructions for instructing a
computer device (which may be a personal computer, a server, a
network device, or the like) to perform all or some of the steps of
the methods described in the embodiments of this application. The
foregoing storage medium includes: any medium that can store
program code, such as a USB flash drive, a removable hard disk, a
ROM, a RAM, a magnetic disk, or an optical disc.
[0187] The foregoing descriptions are merely specific
implementations of this application, but are not intended to limit
the protection scope of this application. Any variation or
replacement readily figured out by a person skilled in the art
within the technical scope disclosed in this application shall fall
within the protection scope of this application. Therefore, the
protection scope of this application shall be subject to the
protection scope of the claims.
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