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US-20260128838-A1 - COMMUNICATION METHOD AND APPARATUS

US20260128838A1US 20260128838 A1US20260128838 A1US 20260128838A1US-20260128838-A1

Abstract

This application provides a communication method and a communication apparatus. The method includes: receiving first indication information, where the first indication information indicates a first parameter configuration, the first parameter configuration is one of K parameter configurations, and K is a positive integer; and any parameter configuration in the K parameter configurations includes one or more of the following parameters: a quantity of resource blocks RBs, a frequency domain resource offset, a quantity of time domain symbols, and a mapping manner; and determining a time-frequency resource position of a first control resource set CORESET based on the first parameter configuration.

Inventors

  • Huan Sun
  • Zhihu Luo

Assignees

  • HUAWEI TECHNOLOGIES CO., LTD.

Dates

Publication Date
20260507
Application Date
20251231
Priority Date
20230704

Claims (20)

  1. 1 . A communication method, wherein the method comprises: receiving first indication information, wherein the first indication information indicates a first parameter configuration, the first parameter configuration is one of K parameter configurations, and K is a positive integer, wherein any parameter configuration in the K parameter configurations comprises one or more of the following parameters: a quantity of resource blocks RBs, a frequency domain resource offset, a quantity of time domain symbols, and a mapping manner; and determining a time-frequency resource position of a first control resource set CORESET based on the first parameter configuration, wherein the first CORESET is a CORESET #0; and wherein in the K parameter configurations: a bandwidth of a CORESET corresponding to a parameter configuration with a quantity of RBs being 24 is 15 RBs or 20 RBs; a value of a frequency domain resource offset corresponding to a parameter configuration corresponding to a CORESET whose bandwidth is 15 RBs is 0 or 2; a value of a frequency domain resource offset corresponding to a parameter configuration corresponding to a CORESET whose bandwidth is 20 RBs is 0; and a frequency domain resource offset corresponding to the parameter configuration with a quantity of RBs being 12 is 0.
  2. 2 . The method according to claim 1 , wherein a quantity of time domain symbols that corresponds to the parameter configuration with a quantity of RBs being 12 and/or the parameter configuration with a quantity of RBs being 24 in the K parameter configurations is 3.
  3. 3 . The method according to claim 1 , wherein a quantity of time domain symbols that corresponds to the parameter configuration with a quantity of RBs being 24 and a mapping manner being interleaved in the K parameter configurations is 3.
  4. 4 . The method according to claim 1 , wherein one parameter configuration in the K parameter configurations corresponds to a plurality of bandwidths of a CORESET, or one parameter configuration in the K parameter configurations corresponds to values of a plurality of quantities of RBs.
  5. 5 . The method according to claim 4 , wherein the method further comprises: determining a bandwidth of the first CORESET based on a synchronization raster or a frequency band number; or determining a quantity of RBs of the first CORESET based on the synchronization raster or the frequency band number.
  6. 6 . The method according to claim 1 , wherein the first CORESET is a CORESET determined based on a CORESET of 24 RBs, wherein the first CORESET is 15 RBs obtained by puncturing nine RBs with highest frequencies in the CORESET of 24 RBs, or the first CORESET is 20 RBs obtained by puncturing four RBs with highest frequencies in the CORESET of 24 RBs.
  7. 7 . The method according to claim 1 , wherein the frequency domain resource offset is a quantity of RBs by which a first RB is offset relative to a second RB on a frequency domain resource, wherein the first RB is an RB with a smallest number in the first CORESET, or the first RB is an RB with a smallest number in the CORESET of 24 RBs, and the second RB is an RB with a smallest number in an overlapping part between a synchronization signal block SSB of 12 RBs and a common RB, wherein the SSB of 12 RBs is an SSB determined based on an SSB of 20 RBs, or the second RB is an RB with a smallest number in an overlapping part between the SSB of 20 RBs and the common RB.
  8. 8 . The method according to claim 1 , wherein the method further comprises: determining the K parameter configurations based on a channel bandwidth, or determining the K parameter configurations based on the channel bandwidth and the frequency band number, wherein the K parameter configurations are used for a minimum channel bandwidth 3 MHz, or the K parameter configurations are used for a channel bandwidth 3 MHz and/or a channel bandwidth 5 MHz.
  9. 9 . The method according to claim 1 , wherein the first parameter configuration corresponds to a plurality of quantities of RBs or a plurality of bandwidths of a CORESET, and the method further comprises: determining that the bandwidth of the first CORESET is 15 RBs based on a first synchronization raster, wherein the first synchronization raster is determined according to a formula 600 kHz×N+50 kHz×M+300 kHz, or determining that the bandwidth of the first CORESET is 20 RBs based on a synchronization raster of 921.45 MHz.
  10. 10 . A communication method, wherein the method comprises: sending first indication information, wherein the first indication information indicates a first parameter configuration, the first parameter configuration is one of K parameter configurations, and K is a positive integer, wherein any parameter configuration in the K parameter configurations comprises one or more of the following parameters: a quantity of resource blocks RBs, a frequency domain resource offset, a quantity of time domain symbols, and a mapping manner; and indicating a time-frequency resource position of a first control resource set CORESET based on the first parameter configuration, wherein the first CORESET is a CORESET #0; and wherein in the K parameter configurations: a bandwidth of a CORESET corresponding to a parameter configuration with a quantity of RBs being 24 is 15 RBs or 20 RBs; a value of a frequency domain resource offset corresponding to a parameter configuration corresponding to a CORESET whose bandwidth is 15 RBs is 0 or 2; a value of a frequency domain resource offset corresponding to a parameter configuration corresponding to a CORESET whose bandwidth is 20 RBs is 0; and a frequency domain resource offset corresponding to the parameter configuration with a quantity of RBs being 12 is 0.
  11. 11 . The method according to claim 10 , wherein a quantity of time domain symbols that corresponds to the parameter configuration with a quantity of RBs being 12 and/or the parameter configuration with a quantity of RBs being 24 in the K parameter configurations is 3.
  12. 12 . The method according to claim 10 , wherein a quantity of time domain symbols that corresponds to the parameter configuration with a quantity of RBs being 24 and a mapping manner being interleaved in the K parameter configurations is 3.
  13. 13 . The method according to claim 10 , wherein one parameter configuration in the K parameter configurations corresponds to a plurality of bandwidths of a CORESET, or one parameter configuration in the K parameter configurations corresponds to values of a plurality of quantities of RBs.
  14. 14 . The method according to claim 13 , wherein a bandwidth of the first CORESET is associated with a synchronization raster or a frequency band number; or a quantity of RBs of the first CORESET is associated with the synchronization raster or the frequency band number.
  15. 15 . The method according to claim 10 , wherein the first CORESET is a CORESET determined based on a CORESET of 24 RBs, wherein the first CORESET is 15 RBs obtained by puncturing nine RBs with highest frequencies in the CORESET of 24 RBs, or the first CORESET is 20 RBs obtained by puncturing four RBs with highest frequencies in the CORESET of 24 RBs.
  16. 16 . The method according to claim 10 , wherein the frequency domain resource offset is a quantity of RBs by which a first RB is offset relative to a second RB on a frequency domain resource, wherein the first RB is an RB with a smallest number in the first CORESET, or the first RB is an RB with a smallest number in the CORESET of 24 RBs, and the second RB is an RB with a smallest number in an overlapping part between a synchronization signal block SSB of 12 RBs and a common RB, wherein the SSB of 12 RBs is an SSB determined based on an SSB of 20 RBs, or the second RB is an RB with a smallest number in an overlapping part between the SSB of 20 RBs and the common RB.
  17. 17 . The method according to claim 10 , comprising: the K parameter configurations are associated with a channel bandwidth, or the K parameter configurations are associated with the channel bandwidth and the frequency band number; and the K parameter configurations are used for a minimum channel bandwidth 3 MHz, or the K parameter configurations are used for a channel bandwidth 3 MHz and/or a channel bandwidth 5 MHz.
  18. 18 . The method according to claim 10 , wherein the first parameter configuration corresponds to a plurality of quantities of RBs or a plurality of bandwidths of a CORESET, and a bandwidth that is of the first CORESET and that corresponds to a first synchronization raster is 15 RBs, wherein the first synchronization raster is determined according to a formula 600 kHz×N+50 kHz×M+300 kHz, or a bandwidth that is of the first CORESET and that corresponds to a synchronization raster of 921.45 MHz is 20 RBs.
  19. 19 . A communication apparatus, comprising at least one processor, wherein the at least one processor is configured to perform: receive first indication information, wherein the first indication information indicates a first parameter configuration, the first parameter configuration is one of K parameter configurations, and K is a positive integer, wherein any parameter configuration in the K parameter configurations comprises one or more of the following parameters: a quantity of resource blocks RBs, a frequency domain resource offset, a quantity of time domain symbols, and a mapping manner; and determine a time-frequency resource position of a first control resource set CORESET based on the first parameter configuration, wherein the first CORESET is a CORESET #0; and wherein in the K parameter configurations: a bandwidth of a CORESET corresponding to a parameter configuration with a quantity of RBs being 24 is 15 RBs or 20 RBs; a value of a frequency domain resource offset corresponding to a parameter configuration corresponding to a CORESET whose bandwidth is 15 RBs is 0 or 2; a value of a frequency domain resource offset corresponding to a parameter configuration corresponding to a CORESET whose bandwidth is 20 RBs is 0; and a frequency domain resource offset corresponding to the parameter configuration with a quantity of RBs being 12 is 0.
  20. 20 . A communication apparatus, comprising at least one processor, wherein the at least one processor is configured to perform: send first indication information, wherein the first indication information indicates a first parameter configuration, the first parameter configuration is one of K parameter configurations, and K is a positive integer, wherein any parameter configuration in the K parameter configurations comprises one or more of the following parameters: a quantity of resource blocks RBs, a frequency domain resource offset, a quantity of time domain symbols, and a mapping manner; and indicate a time-frequency resource position of a first control resource set CORESET based on the first parameter configuration, wherein the first CORESET is a CORESET #0; and wherein in the K parameter configurations: a bandwidth of a CORESET corresponding to a parameter configuration with a quantity of RBs being 24 is 15 RBs or 20 RBs; a value of a frequency domain resource offset corresponding to a parameter configuration corresponding to a CORESET whose bandwidth is 15 RBs is 0 or 2; a value of a frequency domain resource offset corresponding to a parameter configuration corresponding to a CORESET whose bandwidth is 20 RBs is 0; and a frequency domain resource offset corresponding to the parameter configuration with a quantity of RBs being 12 is 0.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application is a continuation of International Application No. PCT/CN2024/099949, filed on Jun. 18, 2024, which claims priority to Chinese Patent Application No. 202310813502.5, filed on Jul. 4, 2023. The disclosures of the aforementioned applications are hereby incorporated by reference in their entireties. TECHNICAL FIELD This application relates to the field of communication technologies, and in particular, to a communication method and apparatus. BACKGROUND At present, the industry has proposed communication of a new radio (new radio, NR) access technology implemented in a private network spectrum. The private network spectrum is, for example, a 3.6 MHz spectrum in a frequency division duplex (frequency division duplex, FDD) frequency band of the European railway private network, or a 3 MHz spectrum of the European public safety network. In such a narrowband, a quantity of resource blocks (resource block, RB) that can be supported by the private network spectrum in frequency domain is limited, and consequently a network may fail to send a complete public control resource block, for example, a control resource set 0 (control resource set #0, CORESET #0). Therefore, a new parameter configuration set needs to be designed to indicate or determine a time-frequency resource position of the CORESET #0. However, indicating all possible combinations of parameter values may cause excessively high signaling overheads. SUMMARY Embodiments of this application provide a communication method and apparatus, to save signaling resources. According to a first aspect, this application provides a communication method. Optionally, the method may be executed by a terminal device, or by a component (for example, a processor, a chip, or a chip system) used in the terminal device, or by a logical module or software that can implement all or some functions of the terminal device. The method includes: receiving first indication information, where the first indication information indicates a first parameter configuration, the first parameter configuration is one of K parameter configurations, and K is a positive integer, where any parameter configuration in the K parameter configurations includes one or more of the following parameters: a quantity of resource blocks RBs, a frequency domain resource offset, a quantity of time domain symbols, a mapping manner, a multiplexing mode, or a puncturing manner; and determining a time-frequency resource position of a first control resource set CORESET based on the first parameter configuration. According to the method, the first indication information may indicate one of the K parameter configurations, so that the terminal device may determine the first parameter configuration from the K parameter configurations based on the first indication information, to determine the time-frequency resource position of the first CORESET, so that signaling overheads are reduced, or more reserved items are reserved, to indicate other information, so as to reduce signaling overheads. In an example manner, the any parameter configuration in the K parameter configurations includes the following parameters, or consists of the following parameters: a quantity of resource blocks RBs, a frequency domain resource offset, a quantity of time domain symbols, a mapping manner, and a multiplexing mode. In another example manner, the any parameter configuration in the K parameter configurations includes the following parameters, or consists of the following parameters: a quantity of resource blocks RBs, a frequency domain resource offset, a quantity of time domain symbols, a mapping manner, a multiplexing mode, and a puncturing manner. In an optional manner, K is 13, 14, 15, or 16. In an optional manner, the K parameter configurations are used for CORESETs. In an optional manner, the frequency domain resource offset is a frequency domain resource offset of a CORESET relative to an SSB. In an optional manner, the quantity of time domain symbols is a quantity of symbols occupied by a CORESET in time domain. In an optional manner, the mapping manner is interleaved or non-interleaved. The mapping manner is a manner of CCE-to-REG mapping in a CORESET. In an optional manner, the multiplexing mode is a multiplexing mode between an SSB and a CORESET. In an optional manner, the puncturing manner is a puncturing manner for a CORESET or a CORESET #0. In an optional manner, bandwidths of the CORESETs corresponding to the K parameter configurations each are less than 24 RBs. Specifically, the bandwidths of the CORESETs corresponding to the K parameter configurations include one or more of 12 RBs, 15 RBs, and 20 RBs. For example, the bandwidths of the CORESETs corresponding to the K parameter configurations include 12 RBs and 15 RBs, or 15 RBs and 20 RBs, or 15 RBs. In an optional manner, the bandwidths of the CORESETs corresponding to the K parameter configurations include 20 RBs and 24 R