US-12628155-B2 - Communication method and apparatus

US12628155B2US 12628155 B2US12628155 B2US 12628155B2US-12628155-B2

Abstract

This application discloses a communication method and apparatus. In the method, a terminal device receives first configuration information from an access network device, where the first configuration information is for configuring M configured grant (CG) resources to correspond N downlink reference signals. The M CG resources are used by the terminal device to send uplink information when the terminal device is in a non-connected state. The terminal device then receives first reconfiguration information from the access network device after the terminal device enters the non-connected state, where the first reconfiguration information is for updating downlink reference signals corresponding to some or all of the M CG resources.

Inventors

Yunhao Zhang
Yinghao GUO
Chaojun Li
Yiqun WU

Assignees

HUAWEI TECHNOLOGIES CO., LTD.

Dates

Publication Date: 20260512
Application Date: 20230622

Claims (20)

1 . A communication method, comprising: receiving first configuration information from an access network device, wherein the first configuration information is for configuring M configured grant (CG) resources to correspond to N downlink reference signals, and the M CG resources are used by a terminal device to send uplink information when the terminal device is in a non-connected state; receiving, at the terminal device, P downlink reference signals including the N downlink reference signals, and performing measurements of the P downlink reference signals; transmitting, by the terminal device and based on the measurements, first information to the access network device, the first information indicating at least one downlink reference signal among the P downlink reference signals; and receiving first reconfiguration information from the access network device when the terminal device is in the non-connected state, wherein the first reconfiguration information is for updating a correspondence between at least one of the M CG resources and the at least one downlink reference signal indicated by the first information, wherein M, P and N are positive integers.
2 . The method according to claim 1 , wherein that the M CG resources correspond to N downlink reference signals comprises at least one of the following: the M CG resources belong to one or more sets of CG resources, each CG resource belongs to one of the one or more sets of CG resources, and each set of CG resources corresponds to one or more downlink reference signals in the N downlink reference signals; the M CG resources are in one or more periodicities, each CG resource is in one of the periodicities, and each periodicity corresponds to one or more downlink reference signals in the N downlink reference signals; or one or more CG resources in the M CG resources correspond to one or more downlink reference signals in the N downlink reference signals.
3 . The method according to claim 1 , wherein the N downlink reference signals comprise a first downlink reference signal; and the method further comprises: sending first information to the access network device on a CG resource corresponding to the first downlink reference signal.
4 . The method according to claim 3 , wherein the method further comprises: sending uplink data to the access network device on the CG resource corresponding to the first downlink reference signal.
5 . The method according to claim 3 , wherein a measurement value of the first downlink reference signal is greater than or equal to a first threshold; or a measurement value of the first downlink reference signal is greater than or equal to measurement values of other downlink reference signals in the N downlink reference signals.
6 . The method according to claim 3 , wherein the P downlink reference signals comprise a second downlink reference signal, and a measurement value of the second downlink reference signal is greater than the measurement value of the first downlink reference signal; and the first information comprises the measurement value of the first downlink reference signal and the measurement value of the second downlink reference signal; or the first information comprises an index of the second downlink reference signal; or the first information comprises measurement values of the P downlink reference signals.
7 . The method of claim 1 , wherein the correspondence between at least one of the M CG resources and the at least one downlink reference signal is determined based on a granularity of one of: a CG resource set, a periodicity, or a quantity of CG resources.
8 . An apparatus, comprising: one or more processors; and a memory having instructions stored thereon that, when executed by the one or more processors, cause the apparatus to: receive first configuration information from an access network device, wherein the first configuration information is for configuring M configured grant (CG) resources to correspond to N downlink reference signals, and the M CG resources are used by a terminal device to send uplink information when the terminal device is in a non-connected state; receive, at the terminal device, P downlink reference signals including the N downlink reference signals, and perform measurements of the P downlink reference signals; transmit, by the terminal device and based on the measurements, first information to the access network device, the first information indicating at least one downlink reference signal among the P downlink reference signals; and receive first reconfiguration information from the access network device when the terminal device is in the non-connected state, wherein the first reconfiguration information is for updating a correspondence between at least one of the M CG resources and the at least one downlink reference signal indicated by the first information, wherein M, P and N are positive integers.
9 . The apparatus according to claim 8 , wherein the M CG resources belong to one or more sets of CG resources, each CG resource belongs to one of the one or more sets of CG resources, and each set of CG resources corresponds to one or more downlink reference signals in the N downlink reference signals; the M CG resources are in one or more periodicities, each CG resource is in one of the periodicities, and each periodicity corresponds to one or more downlink reference signals in the N downlink reference signals; or one or more CG resources in the M CG resources correspond to one or more downlink reference signals in the N downlink reference signals.
10 . The apparatus according to claim 8 , wherein the N downlink reference signals comprise a first downlink reference signal; and the apparatus is further caused to: send first information to the access network device on a CG resource corresponding to the first downlink reference signal.
11 . The apparatus according to claim 10 , wherein the apparatus is further caused to: send uplink data to the access network device on the CG resource corresponding to the first downlink reference signal.
12 . The apparatus according to claim 10 , wherein a measurement value of the first downlink reference signal is greater than or equal to a first threshold; or a measurement value of the first downlink reference signal is greater than or equal to measurement values of other downlink reference signals in the N downlink reference signals.
13 . The apparatus according to claim 10 , wherein the P downlink reference signals comprise a second downlink reference signal, and a measurement value of the second downlink reference signal is greater than the measurement value of the first downlink reference signal; and the first information comprises the measurement value of the first downlink reference signal and the measurement value of the second downlink reference signal; or the first information comprises an index of the second downlink reference signal; or the first information comprises measurement values of the P downlink reference signals.
14 . The apparatus according to claim 8 , wherein the correspondence between at least one of the M CG resources and the at least one downlink reference signal is determined based on a granularity of one of: a CG resource set, a periodicity, or a quantity of CG resources.
15 . A non-transitory computer readable medium storing instructions that are executable by a computer, the non-transitory computer readable medium is applied to a first communication apparatus, and the instructions comprise instructions for: receiving first configuration information from an access network device, wherein the first configuration information is for configuring M configured grant (CG) resources to correspond to N downlink reference signals, and the M CG resources are used by a terminal device to send uplink information when the terminal device is in a non-connected state; receive, at the terminal device, P downlink reference signals including the N downlink reference signals, and perform measurements of the P downlink reference signals; transmit, by the terminal device and based on the measurements, first information to the access network device, the first information indicating at least one downlink reference signal among the P downlink reference signals; and receiving first reconfiguration information from the access network device when the terminal device is in the non-connected state, wherein the first reconfiguration information is for updating a correspondence between at least one of the M CG resources and the at least one downlink reference signal indicated by the first information, wherein M, P and N are positive integers.
16 . The non-transitory computer readable medium according to claim 15 , wherein that the M CG resources correspond to N downlink reference signals comprises at least one of the following: the M CG resources belong to one or more sets of CG resources, each CG resource belongs to one of the one or more sets of CG resources, and each set of CG resources corresponds to one or more downlink reference signals in the N downlink reference signals; the M CG resources are in one or more periodicities, each CG resource is in one of the periodicities, and each periodicity corresponds to one or more downlink reference signals in the N downlink reference signals; or one or more CG resources in the M CG resources correspond to one or more downlink reference signals in the N downlink reference signals.
17 . The non-transitory computer readable medium according to claim 15 , wherein the N downlink reference signals comprise a first downlink reference signal; and the instructions further comprise instructions for: sending first information to the access network device on a CG resource corresponding to the first downlink reference signal.
18 . The non-transitory computer readable medium according to claim 17 , wherein the instructions further comprise instructions for: sending uplink data to the access network device on the CG resource corresponding to the first downlink reference signal.
19 . The non-transitory computer readable medium according to claim 17 , wherein the P downlink reference signals comprise a second downlink reference signal, and a measurement value of the second downlink reference signal is greater than the measurement value of the first downlink reference signal; and the first information comprises the measurement value of the first downlink reference signal and the measurement value of the second downlink reference signal; or the first information comprises an index of the second downlink reference signal; or the first information comprises measurement values of the P downlink reference signals.
20 . The non-transitory computer readable medium according to claim 15 , wherein the correspondence between at least one of the M CG resources and the at least one downlink reference signal is determined based on a granularity of one of: a CG resource set, a periodicity, or a quantity of CG resources.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application is a continuation of International Application No. PCT/CN2020/139553, filed on Dec. 25, 2020, the disclosure of which is hereby incorporated by reference in its entirety. TECHNICAL FIELD This application relates to the field of wireless communication technologies, and in particular, to a communication method and apparatus. BACKGROUND In a fifth generation (5G) communication system, a terminal device has three radio resource control (RRC) states: an RRC-connected (RRC-connected) state, an RRC-idle state, and an RRC-inactive state. The terminal device in the RRC-connected state may perform data transmission with an access network device. However, when the terminal device in the RRC-inactive state (or the RRC-idle state) intends to perform data transmission with the access network device, the terminal device needs to first complete multiple information exchanges to enter the connected state. In other words, the terminal device in the RRC-inactive state needs to first enter the RRC-connected state, and then performs data transmission with the access network device. To reduce power consumption by a terminal device in the RRC-inactive state, a solution for a small data transmission scenario is currently provided. To be specific, the terminal device may send uplink data to the access network device when the terminal device is in the RRC-inactive state, and does not need to enter the RRC-connected state first before sending the uplink data. However, for the solution for the small data transmission scenario, further research is still required, to improve the performance of the access network device when receiving small data. SUMMARY This application provides a communication method and apparatus, to improve receiving performance of an access network device receiving uplink data sent by a terminal device on a configured grant (CG) resource. According to a first aspect, an embodiment of this application provides a communication method. The method is used to implement a function on a terminal device side. For example, the method may be applied to a terminal device or a chip in a terminal device. Embodiments of this application do not limit a specific execution body of the method. By using example in which the method is applied to a terminal device, in the method, the terminal device receives first configuration information from an access network device, where the first configuration information is for configuring M CG resources to correspond N downlink reference signals. Optionally, when the terminal device is in a non-connected state, the terminal device may send uplink information on a CG resource based on the first configuration information. The uplink information may be information carried on a physical uplink shared channel (PUSCH) and/or a physical uplink control channel (PUCCH). In the foregoing manner, the access network device may configure, for the terminal device, that the M CG resources correspond to the N downlink reference signals. Therefore, when the terminal device sends uplink data (for example, small data) on a CG resource corresponding to a downlink reference signal, the access network device may receive the uplink data on the CG resource by using a corresponding receive beam, so that the receiving performance of the access network device receiving the uplink data can be effectively improved. In a possible design, the terminal device may further receive first reconfiguration information from the access network device after the terminal device enters the non-connected state, where the first reconfiguration information is for updating downlink reference signals corresponding to some or all of the M CG resources. M and N are positive integers. Optionally, the first reconfiguration information may be carried in downlink control information (DCI), a media access control control element (MAC CE), or a radio resource control (RRC) message. Alternatively, the first reconfiguration information may also be carried in a message transmitted in a random access process, for example, a MsgB in a two-step random access process, or a Msg2 or a Msg4 in a four-step random access process. In the foregoing manner, the access network device may send first reconfiguration information to the terminal device, to update a correspondence between a CG resource and a downlink reference signal. In this way, when the terminal device moves in an RRC-non-connected state, the correspondence between the CG resource and the downlink reference signal can be adjusted in a timely and flexible manner, so that after selecting a current downlink reference signal, the terminal device can have more CG resources for sending uplink data, to ensure data transmission of the terminal device in the RRC-non-connected state. In a possible design, when the first reconfiguration information is carried in the DCI, the DCI may further include second information, and the second information includes hy