US-12627457-B2 - Bandwidth part activation or deactivation method, sidelink connection release method, and device

Abstract

A bandwidth part activation or deactivation method includes: determining to activate or deactivate an SL BWP according to one of following: configuration information of a Uu BWP and configuration information of the SL BWP; or receipt of an activation or deactivation indication sent by a network side device or a peer terminal, or receipt of activation or deactivation confirmation information sent by the network side device or the peer terminal, where the activation or deactivation confirmation information is feedback information of an activation or deactivation request sent by the network side device or the peer terminal for the terminal.

Inventors

• Jing Liang
• Xiaodong Yang

Assignees

• VIVO MOBILE COMMUNICATION CO., LTD.

Dates

Publication Date

20260512

Application Date

20220727

Priority Date

20200213

Claims (13)

1. 1 . A bandwidth part activation or deactivation method, performed by a terminal and comprising: determining to deactivate a sidelink bandwidth part (SL BWP) according to configuration information of a Uu BWP and configuration information of the SL BWP; wherein a numerology of the Uu BWP is different from a numerology of the SL BWP; and after the determining to deactivate the SL BWP, the method further comprises: in a case that an untransmitted medium access control (MAC) protocol data unit (PDU) or an MAC service data unit (SDU) or an MAC control element (CE) still exists for a to-be-released PC5-RRC connection or a released PC5-RRC connection, discarding the MAC PDU or the MAC SDU, or canceling a process corresponding to a discarded MAC PDU.
2. 2 . The method according to claim 1 , wherein configuration information comprises at least one of following: a subcarrier spacing (SCS) or numerology; bandwidth information; a transmission priority of a channel; or a BWP identifier (ID).
3. 3 . The method according to claim 1 , wherein a type of the Uu BWP is at least one of following: an initial downlink BWP; an initial uplink BWP; a first activation downlink BWP; a first activation uplink BWP; a current activation downlink BWP; a current activation uplink BWP; an uplink channel bandwidth of the terminal; a downlink channel bandwidth of the terminal; or a bandwidth occupied by a control resource set (CORSET) #0.
4. 4 . The method according to claim 1 , wherein determining to deactivate the SL BWP according to at least one of following configuration information: a numerology of the Uu BWP is different from a numerology of the SL BWP, or a subcarrier spacing (SCS) of the Uu BWP is different from an SCS of the SL BWP; a bandwidth of the Uu BWP is within a bandwidth range of the SL BWP; a bandwidth of the Uu BWP partially overlaps with the bandwidth of the SL BWP; or a transmission priority of a sidelink shared channel is lower than a transmission priority of a physical uplink control channel and/or a transmission priority of an uplink shared channel.
5. 5 . The method according to claim 1 , wherein after the determining to deactivate the SL BWP, the method further comprises at least one of following: stopping sending on a physical sidelink broadcast channel; stopping sending on a physical sidelink control channel; stopping sending on a sidelink shared channel; stopping sending on a physical sidelink feedback channel; stopping monitoring or receiving on the physical sidelink broadcast channel; stopping monitoring or receiving on the physical sidelink control channel; stopping receiving on the sidelink shared channel; stopping monitoring or receiving on the physical sidelink feedback channel; stopping reporting channel state information; suspending one or more sidelink configured grant type 1 resources on the SL BWP; clearing one or more sidelink configured grant type 2 resources on the SL BWP; or releasing one or more PC5-radio resource control (RRC) connections on the SL BWP.
6. 6 . The method according to claim 1 , wherein a destination identifier (ID) or a connection identifier (ID) corresponding to the MAC PDU belongs to the PC5-RRC.
7. 7 . The method according to claim 1 , wherein after the determining to deactivate the SL BWP, the method further comprises: sending the deactivation indication on sidelink or uplink, wherein the deactivation indication comprises at least an SL BWP identifier (ID).
8. 8 . The method according to claim 7 , wherein in a case that the deactivation indication is sent on the sidelink, the deactivation indication is carried in at least one of following messages: a broadcast or multicast message; a PC5-radio resource control (RRC) message; a medium access control (MAC) control element (CE) message; a PC5-S message; a message on a sidelink shared channel (SL-SCH); or a message on a physical sidelink control channel (PSCCH); wherein the message on the PSCCH comprises at least one of following: first-step sidelink control information (SCI) or second-step (SCI).
9. 9 . The method according to claim 7 , wherein after the sending the deactivation indication on sidelink or uplink, the method further comprises: stopping sidelink transmission; or after receiving the deactivation confirmation information sent by a peer terminal, stopping the sidelink transmission.
10. 10 . A terminal, comprising a processor, a memory, and a computer program stored in the memory and executable on the processor, wherein the computer program, when executed by the processor, implements steps of the bandwidth part activation or deactivation method according to claim 1 .
11. 11 . A sidelink connection release method, performed by a terminal and comprising: in a case that a PC5-radio resource control (RRC) connection needs to be released or the PC5-RRC connection is released, and an untransmitted medium access control (MAC) protocol data unit (PDU) or an MAC service data unit (SDU) or an MAC control element (CE) that is related to the PC5-RRC still exists, performing any one of following: discarding the MAC PDU or the MAC SDU; canceling a process corresponding to a discarded MAC PDU.
12. 12 . The method according to claim 11 , wherein a destination ID or a connection ID corresponding to the MAC PDU belongs to the PC5-RRC.
13. 13 . A terminal, comprising a processor, a memory, and a computer program stored in the memory and executable on the processor, wherein the computer program, when executed by the processor, implements steps of a sidelink connection release method according to claim 11 .

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application is a Bypass Continuation Application of PCT/CN2021/076488 filed on Feb. 10, 2021, which claims priority to Chinese Patent Application No. 202010091504.4, filed on Feb. 13, 2020, which are incorporated herein by reference in their entirety. TECHNICAL FIELD Embodiments of the present disclosure relate to the field of wireless communication technologies, and in particular, to a bandwidth part activation or deactivation method, a sidelink connection release method, and a device. BACKGROUND Sidelink Introduction Long Term Evolution (LTE) systems start to support sidelink (SL) from the 12th release version, which is used for direct data transmission between terminal user equipment (UE, also known as a terminal) without a network device. The design of LTE sidelink is suitable for specific public security affairs (such as emergency communication in places where a disaster such as fire or earthquake occurs), or vehicle to everything (V2X) communication. The V2X communication includes various services, such as basic security communication, advanced (autonomous) driving, formation, and sensor expansion. Because the LTE sidelink only supports broadcast communication, the LTE sidelink is mainly used for basic security communication, and other advanced V2X services are supported by using New Radio (NR) sidelink. A 5G NR system may be used in an operating frequency band above 6 GHz that is not supported by the LTE, and supports a greater operating bandwidth. However, the current version of NR system only supports an interface between a base station and a terminal, and does not support a sidelink interface for direct communication between terminals. Optionally, in a network architecture that supports Proximity-based Services (ProSe), a communication interface between terminals is referred to as a PC5 interface, and an interface that connects a terminal to an access network device such as an Evolved Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (E-UTRAN) is referred to as a Uu interface. Uu Bandwidth Part (BWP) Introduction In the 5G NR system, a maximum system bandwidth of up to 400 MHz is supported in a cell, which is much greater than a maximum system bandwidth of 20 MHz of the LTE, to support a larger system and user throughput. However, for the implementation of UE, it is a huge challenge to support such a great system bandwidth, which does not help the implementation of low-cost UE. Therefore, the 5G NR system also supports dynamic and flexible bandwidth allocation. The system bandwidth is divided into a plurality of BWPs to support access of a narrow band terminal user, or a terminal user in a power saving mode. In addition, configuration of different numerologies in different bandwidths is also supported in an NR cell. If the UE cannot support all the Numerologies in the cell, configuration of a corresponding frequency band to the UE can be avoided during configuration of the BWP for the UE. SUMMARY Embodiments of the present disclosure provide a bandwidth part activation or deactivation method and a sidelink connection release method and device. According to a first aspect, an embodiment of the present disclosure provides a bandwidth part activation or deactivation method, performed by a terminal, including: determining to activate or deactivate an SL BWP according to one of following:configuration information of a Uu BWP and configuration information of the SL BWP; orreceipt of an activation or deactivation indication sent by a network side device or a peer terminal, or receipt of activation or deactivation confirmation information sent by the network side device or the peer terminal, wherein the activation or deactivation confirmation information is feedback information of an activation or deactivation request sent by the network side device or the peer terminal for the terminal. According to a second aspect, an embodiment of the present disclosure provides a bandwidth part activation or deactivation method, performed by a network side device, including:sending an activation or deactivation indication to a terminal, or sending activation or deactivation confirmation information to instruct the terminal to activate or deactivate an SL BWP of the terminal. According to a third aspect, an embodiment of the present disclosure provides a terminal, including: a determining module, configured to determine to activate or deactivate an SL BWP according to one of following:configuration information of a Uu BWP and configuration information the SL BWP; orreceipt of an activation or deactivation indication sent by a network side device or a peer terminal, or receipt of activation or deactivation confirmation information sent by the network side device or the peer terminal, wherein the activation or deactivation confirmation information is feedback information of an activation or deactivation request sent by the network side device o