Search

CN-122002561-A - Communication method and device

CN122002561ACN 122002561 ACN122002561 ACN 122002561ACN-122002561-A

Abstract

A communication method and device are applicable to a scene of initial access of terminal equipment to a network. The method comprises the steps that the network equipment sends first information, the first information is used for indicating a first frequency band list, the first frequency band list is used for indicating a frequency band to which a first cell belongs, and the terminal equipment sends second information, the second information is used for indicating the first frequency band, and the first frequency band belongs to the first frequency band list. Since the terminal device indicates the first frequency band to the network device, understanding of the frequency band to be used by the network device and the terminal device is consistent, and communication failure can be reduced. For example, the network device configures a carrier combination for the terminal device according to the first frequency band, and the terminal device sends random access on the first frequency band according to the carrier combination, so that network access failure of the terminal device can be reduced, and the number of times of launching reconstruction by the terminal device is reduced.

Inventors

  • LI JIAOJIAO
  • KONG LINGSHUAI
  • DAI ZHENHUA
  • LI BINGZHAO

Assignees

  • 华为技术有限公司

Dates

Publication Date
20260508
Application Date
20241106

Claims (20)

  1. 1. A communication method, wherein the method is applicable to a terminal device or a chip of the terminal device, the method comprising: Receiving first information, wherein the first information is used for indicating a first frequency band list, and the first frequency band list is used for indicating a frequency band to which a first cell belongs; and sending second information, wherein the second information is used for indicating a first frequency band, and the first frequency band belongs to the first frequency band list.
  2. 2. The method of claim 1, wherein the method further comprises: And determining the first frequency band from the first frequency band list according to the first information and the capability of the terminal equipment.
  3. 3. The method of claim 1 or 2, wherein the first frequency band satisfies one or more of: the terminal equipment supports the first frequency band; The terminal equipment supports at least one emission power spurious requirement on the first frequency band; the terminal equipment supports an uplink channel bandwidth, and the maximum transmission bandwidth of the uplink channel bandwidth is smaller than or equal to a carrier bandwidth and is larger than or equal to an uplink bandwidth part BWP bandwidth; the terminal equipment supports a downlink channel bandwidth, and the maximum transmission bandwidth of the downlink channel bandwidth is smaller than or equal to a carrier bandwidth and is larger than or equal to a downlink BWP bandwidth; In case the first cell indicates that 7.5kHz frequency offset is supported, the terminal device supports 7.5kHz frequency offset on the first frequency band; under the condition that the first cell indicates the terminal equipment supporting the half-duplex frequency division duplex (HD-FDD) to be accessed, or the terminal equipment supports the full-duplex frequency division duplex (FD-FDD) on the first frequency band; And under the condition that the first cell does not prohibit the access of the terminal equipment with the first characteristic, the terminal equipment supports the first characteristic on the first frequency band, wherein the first characteristic comprises that the terminal equipment supports one antenna channel or the terminal equipment supports two antenna channels.
  4. 4. The method of claim 3, wherein the first frequency band is a first frequency band in the first list of frequency bands that satisfies the one or more conditions.
  5. 5. The method of any one of claims 1-4, wherein the second information is carried in one or more of: A radio resource control, RRC, setup complete message; RRC resume complete message; RRC reestablishment complete message; Media access control, MAC, control element, CE, message, or And the random access message is used for sending a first lead code, and the first lead code corresponds to the first frequency band.
  6. 6. The method of any one of claims 1-5, wherein the method further comprises: Transmitting capability information of the terminal equipment; third information is received, the third information including carrier configuration information, the carrier configuration information being related to the first frequency band and the capability information.
  7. 7. A communication method, wherein the method is applied to an access network device or a chip of the access network device, the method comprising: Transmitting first information, wherein the first information is used for indicating a first frequency band list, and the first frequency band list is used for indicating a frequency band to which a first cell belongs; And receiving second information from the terminal equipment, wherein the second information is used for indicating a first frequency band, and the first frequency band belongs to the first frequency band list.
  8. 8. The method of claim 7, wherein the first frequency band satisfies one or more of the following conditions: the terminal equipment supports the first frequency band; The terminal equipment supports at least one emission power spurious requirement on the first frequency band; the terminal equipment supports an uplink channel bandwidth, and the maximum transmission bandwidth of the uplink channel bandwidth is smaller than or equal to a carrier bandwidth and is larger than or equal to an uplink bandwidth part BWP bandwidth; the terminal equipment supports a downlink channel bandwidth, and the maximum transmission bandwidth of the downlink channel bandwidth is smaller than or equal to a carrier bandwidth and is larger than or equal to a downlink BWP bandwidth; In case the first cell indicates that 7.5kHz frequency offset is supported, the terminal device supports 7.5kHz frequency offset on the first frequency band; under the condition that the first cell indicates the terminal equipment supporting the half-duplex frequency division duplex (HD-FDD) to be accessed, or the terminal equipment supports the full-duplex frequency division duplex (FD-FDD) on the first frequency band; And under the condition that the first cell does not prohibit the access of the terminal equipment with the first characteristic, the terminal equipment supports the first characteristic on the first frequency band, wherein the first characteristic comprises that the terminal equipment supports one antenna channel or the terminal equipment supports two antenna channels.
  9. 9. The method of claim 8, wherein the first frequency band is a first frequency band in the first list of frequency bands that satisfies the one or more conditions.
  10. 10. The method of any of claims 7-9, wherein the second information is carried in one or more of: A radio resource control, RRC, setup complete message; RRC resume complete message; RRC reestablishment complete message; Media access control, MAC, control element, CE, message, or And the random access message is used for sending a first lead code, and the first lead code corresponds to the first frequency band.
  11. 11. The method of any one of claims 7-10, wherein the method further comprises: receiving capability information of the terminal equipment; determining third information according to the capability information and the first frequency band, wherein the third information comprises carrier configuration information; and sending the third information.
  12. 12. A communication method, wherein the method is applicable to a terminal device or a chip of the terminal device, the method comprising: Receiving first information, wherein the first information is used for indicating a first frequency band list, and the first frequency band list is used for indicating a frequency band to which a first cell belongs; Transmitting fourth information, wherein the fourth information is used for indicating a second frequency band list, and frequency bands in the second frequency band list belong to the first frequency band list; and receiving fifth information, wherein the fifth information is used for indicating a second frequency band, and the second frequency band belongs to the second frequency band list.
  13. 13. The method of claim 12, wherein the method further comprises: And determining the second frequency band list from the first frequency list according to the first information and the capability of the terminal equipment.
  14. 14. The method of claim 12 or 13, wherein any frequency band in the second list of frequency bands satisfies one or more of the following: the terminal equipment supports the frequency band; The terminal equipment supports at least one emission power spurious requirement on the frequency band; the terminal equipment supports an uplink channel bandwidth, and the maximum transmission bandwidth of the uplink channel bandwidth is smaller than or equal to a carrier bandwidth and is larger than or equal to an uplink bandwidth part BWP bandwidth; the terminal equipment supports a downlink channel bandwidth, and the maximum transmission bandwidth of the downlink channel bandwidth is smaller than or equal to a carrier bandwidth and is larger than or equal to a downlink BWP bandwidth; in case the first cell indicates that a 7.5kHz frequency offset is supported, the terminal device supports a 7.5kHz frequency offset on the frequency band; Under the condition that the first cell indicates the terminal equipment supporting the half-duplex frequency division duplex (HD-FDD) to be accessed, or the terminal equipment supports the full-duplex frequency division duplex (FD-FDD) on the frequency band; and under the condition that the first cell does not prohibit the access of the terminal equipment with the first characteristic, the terminal equipment supports the first characteristic on the frequency band, wherein the first characteristic comprises that the terminal equipment supports one antenna channel or the terminal equipment supports two antenna channels.
  15. 15. The method of any one of claims 12-14, wherein the fourth information is carried in one or more of: A radio resource control, RRC, setup complete message; RRC resume complete message; RRC reestablishment complete message, or Media access control MAC control element CE message.
  16. 16. The method of any one of claims 12-15, wherein the method further comprises: Transmitting capability information of the terminal equipment; sixth information is received, the sixth information including carrier configuration information, the carrier configuration information being related to the second frequency band and the capability information.
  17. 17. A communication method, wherein the method is applied to an access network device or a chip of the access network device, the method comprising: Transmitting first information, wherein the first information is used for indicating a first frequency band list, and the first frequency band list is used for indicating a frequency band to which a first cell belongs; Receiving fourth information from a terminal device, wherein the fourth information is used for indicating a second frequency band list, and frequency bands in the second frequency band list belong to the first frequency band list; And transmitting fifth information, wherein the fifth information is used for indicating a second frequency band, and the second frequency band belongs to the second frequency band list.
  18. 18. The method of claim 17, wherein any frequency band in the second list of frequency bands satisfies one or more of the following: the terminal equipment supports the frequency band; The terminal equipment supports at least one emission power spurious requirement on the frequency band; the terminal equipment supports an uplink channel bandwidth, and the maximum transmission bandwidth of the uplink channel bandwidth is smaller than or equal to a carrier bandwidth and is larger than or equal to an uplink bandwidth part BWP bandwidth; the terminal equipment supports a downlink channel bandwidth, and the maximum transmission bandwidth of the downlink channel bandwidth is smaller than or equal to a carrier bandwidth and is larger than or equal to a downlink BWP bandwidth; in case the first cell indicates that a 7.5kHz frequency offset is supported, the terminal device supports a 7.5kHz frequency offset on the frequency band; Under the condition that the first cell indicates the terminal equipment supporting the half-duplex frequency division duplex (HD-FDD) to be accessed, or the terminal equipment supports the full-duplex frequency division duplex (FD-FDD) on the frequency band; and under the condition that the first cell does not prohibit the access of the terminal equipment with the first characteristic, the terminal equipment supports the first characteristic on the frequency band, wherein the first characteristic comprises that the terminal equipment supports one antenna channel or the terminal equipment supports two antenna channels.
  19. 19. The method of claim 17 or 18, wherein the fourth information is carried in one or more of: A radio resource control, RRC, setup complete message; RRC resume complete message; RRC reestablishment complete message, or Media access control MAC control element CE message.
  20. 20. The method of any one of claims 17-19, wherein the method further comprises: receiving capability information of the terminal equipment; determining the second frequency band in the second frequency band list according to the capability information; determining sixth information according to the capability information and the second frequency band, wherein the sixth information comprises carrier configuration information; And transmitting the sixth information.

Description

Communication method and device Technical Field The present application relates to the field of communications technologies, and in particular, to a communications method and apparatus. Background Typically, after determining cells in which the terminal device can camp, the terminal device performs a band (band) selection procedure according to the capabilities of the terminal device. The terminal device may determine the relevant configuration (e.g., radio frequency configuration) based on the selected band. For the network side, the network device may also configure appropriate parameters, such as carrier combination, for the terminal device according to the band. The band selected by the network device may not be consistent with the band selected by the terminal device. If the band selected by the network device is inconsistent with the band selected by the terminal device, normal communication can be affected. For example, if the network device configures a CA combination for the terminal device according to the band selected by the network device, the CA combination is not matched with the band combining capability of the band selected by the terminal device, which may cause the terminal device to reestablish a link, and further cause service interruption. Disclosure of Invention The embodiment of the application provides a communication method and a communication device, which can ensure that the band selected by a terminal device is consistent with the band selected by a network device, so as to reduce communication failure of the terminal device and improve communication efficiency of the terminal device. In order to achieve the above purpose, the embodiment of the application adopts the following technical scheme: In a first aspect, a communication method is provided, which can be applied to a terminal-side apparatus (also referred to as a terminal apparatus). For example, the terminal device may be a terminal device or a module or unit for performing part of the functions of the terminal device, e.g. a circuit or a chip/chip system (e.g. a modem (modem) chip, also called baseband (baseband) chip, or a system on chip (SoC) chip or a system in package (SYSTEMIN PACKAGE, SIP) chip) containing a modem core, or other functional modules in the terminal device. Or the terminal device may be a logical node, a logical module or a software module implementing all or part of the functions of the terminal device. For convenience of description, the method is hereinafter applied to a terminal device as an example. The communication method includes receiving first information and transmitting second information. The first information is used to indicate a first frequency band list indicating a frequency band to which the first cell belongs, and the second information is used to indicate a first frequency band to which the first frequency band belongs. The first cell is a cell where the terminal device resides, or the first cell is a cell where the terminal device attempts to access. The frequency band to which the first cell belongs may be understood as the frequency band in which the carrier of the first cell belongs. For example, if the carrier of the first cell is located within a certain frequency band, the frequency band is the frequency band to which the first cell belongs. The frequency band to which the first cell belongs may also be understood as one or more frequency bands indicated by the first cell. In the method, the terminal device selects the first frequency band from the first frequency band list and indicates the first frequency band to the network device, so that the network device can make sure that the frequency band selected by the terminal device is the first frequency band according to the indication of the terminal device, and further the network device configures (e.g. configures carrier combination) for the terminal device according to the first frequency band. In this way, the carrier combination configured by the network device for the terminal device is matched with the band combination capability of the first band selected by the terminal device, so that communication failure of the terminal device can be reduced. In a second aspect, a communication method is provided, which can be applied to a network-side device (also referred to as a network device). For example, the network apparatus may be a network device, a component (e.g., a circuit, a chip, or a system-on-chip, etc.) in a network device, or a module or unit for performing part or all of the functions of a network device, such as a Centralized Unit (CU), a Distributed Unit (DU), or a Radio Unit (RU). Or the network device may be a logical node, a logical module, or a software module that implements all or part of the functionality of the network apparatus. For convenience of description, the method is hereinafter exemplified as applied to a network device. The communication method comprises the steps of sending first inform