Wireless communication method, terminal device, and network device

Abstract

Provided are a wireless communication method, a terminal device, and a network device. The method comprises: if a terminal device determines to hand over to a first LTM candidate cell, the terminal device executes a first operation, wherein the first operation comprises one or more of the following: initiating a random access procedure; and transmitting first uplink data in the first LTM candidate cell on the basis of a first CG resource, the transmission of the first uplink data being a first uplink transmission of the terminal device in the first LTM candidate cell.

Description

Wireless communication method, terminal device and network device Technical Field

[0001] The present application relates to the field of communication technology, and more specifically, to a wireless communication method, terminal equipment, and network equipment. Background Art

[0002] The Layer 1 / Layer 2 Triggered Mobility (LTM) process is a cell handover process triggered by L1 / L2 signaling. During the LTM process, when a terminal device determines to switch to an LTM candidate cell, how to access the LTM candidate cell becomes a problem that needs to be solved.

[0003] Summary of the Invention

[0004] The embodiments of the present application provide a wireless communication method, terminal device, and network device. The following describes in detail various aspects of the embodiments of the present application.

[0005] In a first aspect, a method for wireless communication is provided, comprising: if a terminal device determines to switch to a first LTM candidate cell, the terminal device performs a first operation; wherein the first operation includes one or more of the following: initiating a random access process; transmitting first uplink data in the first LTM candidate cell based on a first CG resource, the transmission of the first uplink data being the first uplink transmission of the terminal device in the first LTM candidate cell.

[0006] In a second aspect, a method for wireless communication is provided, comprising: after a terminal device successfully accesses a first LTM candidate cell based on a first configured grant (CG) resource, the terminal device retains the first CG resource or releases the first CG resource.

[0007] According to a third aspect, a method for wireless communication is provided, comprising: a network device sends configuration information of a first LTM candidate cell to a terminal device, the configuration information of the first LTM candidate cell including configuration information of a first CG resource, the configuration information of the first CG resource including one or more of the following information: first indication information, used to indicate whether the terminal device releases the first CG resource after successfully accessing the first LTM candidate cell; second indication information, used to indicate whether the terminal device retains the first CG resource after successfully accessing the first LTM candidate cell; and third indication information, used to indicate whether the terminal device releases the association between the first CG resource and the beam after successfully accessing the first LTM candidate cell.

[0008] In a fourth aspect, a terminal device is provided, comprising: a first processing module, configured to perform a first operation if the terminal device determines to switch to a first LTM candidate cell; wherein the first operation includes one or more of the following: initiating a random access process; transmitting first uplink data in the first LTM candidate cell based on a first CG resource, the transmission of the first uplink data being the first uplink transmission of the terminal device in the first LTM candidate cell.

[0009] In the fifth aspect, a terminal device is provided, including: a first processing module, used to retain the first CG resource or release the first CG resource after the terminal device successfully accesses the first LTM candidate cell based on the first CG resource.

[0010] In the sixth aspect, a network device is provided, including: a communication module, used to send configuration information of a first LTM candidate cell to a terminal device, the configuration information of the first LTM candidate cell includes configuration information of a first CG resource, and the configuration information of the first CG resource includes one or more of the following information: first indication information, used to indicate whether the terminal device releases the first CG resource after successfully accessing the first LTM candidate cell; second indication information, used to indicate whether the terminal device retains the first CG resource after successfully accessing the first LTM candidate cell; and third indication information, used to indicate that the terminal device cancels the association between the first CG resource and the beam after successfully accessing the first LTM candidate cell.

[0011] In the seventh aspect, a terminal device is provided, comprising a transceiver, a memory and a processor, wherein the memory is used to store programs, and the processor is used to call the programs in the memory and control the transceiver to receive or send signals so that the terminal device executes the method described in the first aspect.

[0012] In an eighth aspect, a terminal device is provided, comprising a transceiver, a memory and a processor, wherein the memory is used to store programs, and the processor is used to call the programs in the memory and control the transceiver to receive or send signals so that the terminal device executes the method described in the second aspect.

[0013] In the ninth aspect, a network device is provided, comprising a transceiver, a memory and a processor, wherein the memory is used to store programs, and the processor is used to call the programs in the memory and control the transceiver to receive or send signals so that the network device executes the method described in the third aspect.

[0014] In a tenth aspect, a device is provided, comprising a processor for calling a program from a memory so that the device executes a method as described in any one of the first to third aspects.

[0015] In an eleventh aspect, a chip is provided, comprising a processor for calling a program from a memory so that a device equipped with the chip executes a method as described in any one of the first to third aspects.

[0016] In a twelfth aspect, a computer-readable storage medium is provided, on which a program is stored, wherein the program enables a computer to execute the method as described in any one of the first to third aspects.

[0017] In a thirteenth aspect, a computer program product is provided, comprising a program, wherein the program enables a computer to execute the method as described in any one of the first to third aspects.

[0018] In a fourteenth aspect, a computer program is provided, wherein the computer program enables a computer to execute the method as described in any one of the first to third aspects.

[0019] In an embodiment of the present application, when the terminal device determines to switch to a certain LTM candidate cell, it can access the LTM candidate cell by initiating a random access process or using CG resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] FIG1 is a diagram illustrating an example of a system architecture of a wireless communication system to which an embodiment of the present application may be applied.

[0021] FIG2 is a schematic diagram of a cell handover process based on L3 measurement.

[0022] FIG3 is a schematic diagram of a cell handover process based on LTM.

[0023] FIG4 is a schematic flowchart of a wireless communication method provided in Embodiment 1 of the present application.

[0024] Figure 5 is an example diagram of the time interval between the reception time of the first instruction and the transmission opportunity of the CG resource provided in an embodiment of the present application.

[0025] FIG6 is a flow chart of a wireless communication method provided in the second embodiment of the present application.

[0026] FIG7 is a schematic structural diagram of a terminal device provided in one embodiment of the present application.

[0027] FIG8 is a schematic structural diagram of a terminal device provided in another embodiment of the present application.

[0028] FIG9 is a schematic diagram of the structure of a network device provided in an embodiment of the present application.

[0029] FIG10 is a schematic diagram of the structure of the device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0030] The technical solution in this application will be described below with reference to the accompanying drawings.

[0031] Communication system architecture

[0032] FIG1 is a diagram illustrating an exemplary system architecture of a wireless communication system 100 to which embodiments of the present application may be applied. The wireless communication system 100 may include a network device 110 and a terminal device 120. The network device 110 may be a device that communicates with the terminal device 120. The network device 110 may provide communication coverage for a specific geographic area and may communicate with the terminal device 120 within the coverage area.

[0033] FIG1 exemplarily shows a network device and a terminal device. Optionally, the wireless communication system 100 may include one or more network devices 110 and / or one or more terminal devices 120. For a network device 110, the one or more terminal devices 120 may all be located within the network coverage of the network device 110, or all be located outside the network coverage of the network device 110, or some may be located within the coverage of the network device 110 and others outside the network coverage of the network device 110. This is not limited in the embodiments of the present application.

[0034] Optionally, the wireless communication system 100 may further include other network entities such as a network controller and a mobility management entity, which is not limited in the embodiment of the present application.

[0035] It should be understood that the technical solutions of the embodiments of the present application can be applied to various communication systems, such as: fifth generation (5G) system or new radio (NR), long term evolution (LTE) system, LTE frequency division duplex (FDD) system, LTE time division duplex (TDD), etc. The technical solutions provided in this application can also be applied to future communication systems, such as the sixth generation mobile communication system, satellite communication system, etc.

[0036] The terminal device in the embodiments of the present application may also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station (MS), mobile terminal (MT), remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device. The terminal device in the embodiments of the present application may refer to a device that provides voice and / or data connectivity to a user and can be used to connect people, objects and machines, such as a handheld device with wireless connection function, a vehicle-mounted device, etc. The terminal device in the embodiments of the present application can be a mobile phone, a tablet computer, a laptop computer, a PDA, a mobile internet device (MID), a wearable device, a virtual reality (VR) device, an augmented reality (AR) device, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical surgery, a wireless terminal in a smart grid, a wireless terminal in transportation safety, a wireless terminal in a smart city, a wireless terminal in a smart home, etc. Optionally, the UE can be used to act as a base station. For example, the UE can act as a scheduling entity that provides sidelink signals between UEs in V2X or D2D, etc. For example, a cellular phone and a car communicate with each other using sidelink signals. The cellular phone and smart home devices communicate without relaying the communication signal through the base station.

[0037] The network device in the embodiments of the present application may be a device for communicating with a terminal device, and may also be referred to as an access network device or a radio access network device. For example, the network device may be a base station. The network device in the embodiments of the present application may refer to a radio access network (RAN) node (or device) that connects a terminal device to a wireless network. A base station can broadly cover various names as follows, or be replaced with the following names, such as: NodeB, evolved NodeB (eNB), next generation NodeB (gNB), relay station, access point, transmission point (TRP), transmission point (TP), master station MeNB, secondary station SeNB, multi-standard radio (MSR) node, home base station, network controller, access node, wireless node, access point (AP), transmission node, transceiver node, baseband unit (BBU), remote radio unit (RRU), active antenna unit (AAU), remote radio head (RRH), central unit (CU), distributed unit (DU), positioning node, etc. A base station can be a macro base station, a micro base station, a relay node, a donor node or the like, or a combination thereof. A base station can also refer to a communication module, a modem or a chip used to be set in the aforementioned device or apparatus. The base station can also be a mobile switching center and a device that performs base station functions in device-to-device D2D, vehicle-to-everything (V2X), and machine-to-machine (M2M) communications, a network-side device in a 6G network, or a device that performs base station functions in future communication systems. The base station can support networks with the same or different access technologies. The embodiments of this application do not limit the specific technology and specific device form used by the network equipment.

[0038] Base stations can be fixed or mobile. For example, a helicopter or drone can be configured to act as a mobile base station, and one or more cells can move based on the location of the mobile base station. In other examples, a helicopter or drone can be configured to act as a device that communicates with another base station.

[0039] In some deployments, the network device in the embodiments of the present application may refer to a CU or a DU, or the network device may include a CU and a DU. The gNB may also include an AAU.

[0040] The network equipment and terminal devices can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on water; they can also be deployed in the air on aircraft, balloons, and satellites. The embodiments of this application do not limit the scenarios in which the network equipment and terminal devices are located.

[0041] It should be understood that all or part of the functions of the communication device in this application can also be implemented through software functions running on hardware, or through virtualization functions instantiated on a platform (such as a cloud platform).

[0042] Traditional switching

[0043] In wireless communication systems (such as LTE or NR systems), when a terminal device using network services moves from one cell to another, or due to reasons such as wireless transmission service load adjustment, activation operation maintenance, and equipment failure, in order to maintain the continuity of communication and service quality of the terminal device, the system needs to transfer the communication link between the terminal device and the original cell to the new cell, that is, perform a cell handover process. This cell handover mechanism can be a traditional handover or a cell handover based on L3 measurement / signaling.

[0044] The following briefly introduces the cell switching process based on L3 measurement / signaling with reference to FIG. 2 .

[0045] In step 1, the source network device sends a handover request to the target network device.

[0046] The source network device may trigger a handover based on the L3 measurement result reported by the terminal, and send a handover request to the target cell via the Xn interface.

[0047] In step 2, the target network device sends a handover request acknowledgement to the source network device.

[0048] The target network device may accept the handover request from the source network device and provide the RRC configuration of the target network device as part of the handover request confirmation and feed it back to the source network device.

[0049] In step 3, the source network device sends an RRC reconfiguration message to the terminal device.

[0050] The source network device sends an RRC reconfiguration message to the terminal device to instruct the terminal device to initiate a handover process and provides the terminal device with RRC configuration information for accessing the target cell.

[0051] In step 4, the terminal device sends an RRC reconfiguration complete message to the target network device.

[0052] The terminal device accesses the target cell and sends an RRC configuration complete message to the target cell. In order to establish uplink synchronization with the target cell, the terminal device needs to initiate a random access process to the target cell.

[0053] LTM Process

[0054] The handover process in the related art is triggered by L3 signaling (RRC reconfiguration). In order to further reduce the delay of the L3 handover process, the R18 mobility project will support cell handover triggered by L1 / L2 signaling, namely LTM.

[0055] The LTM-based cell handover process can be divided into four stages: LTM preparation, pre-synchronization, LTM execution, and LTM completion. The following briefly describes the LTM-based cell handover process with reference to Figure 3.

[0056] Phase 1: LTM preparation (corresponding to steps 1-3 in Figure 3)

[0057] In step 1, the terminal device in the RRC connected state reports a measurement report to the network device.

[0058] The measurement report in this step is based on L3 measurement. The network device can determine to initiate the LTM process based on the measurement result and trigger candidate cell preparation.

[0059] In step 2, the network device sends an RRC reconfiguration message to the terminal device.

[0060] The RRC reconfiguration message may include configuration information of the LTM candidate cells. The number of LTM candidate cells may be one or more.

[0061] In step 3, the terminal device stores the configuration information of the LTM candidate cell and feeds back an RRC reconfiguration complete message (RRC reconfiguration complete) to the network device.

[0062] Phase 2: Early Synchronization (corresponding to Steps 4a and 4b in Figure 3)

[0063] In step 4a, the terminal device performs downlink synchronization with the candidate cell.

[0064] In step 4b, the terminal device performs uplink synchronization with the candidate cell.

[0065] Before receiving the LTM cell switching command, the terminal device can perform uplink / downlink synchronization with the LTM candidate cell in advance to reduce the interruption delay of the switching process.

[0066] Phase 3: LTM execution (corresponding to steps 5-7 in Figure 3)

[0067] In step 5, the terminal device performs L1 measurement on each candidate cell and reports the L1 measurement result to the network device.

[0068] In step 6, the network device determines a target cell based on the L1 measurement result reported by the terminal device, and instructs the terminal device to switch to the target cell through a media access control element (MAC CE).

[0069] In step 7, if the terminal device currently does not have a valid timing advance (TA) of the target cell, then after receiving the LTM handover indication, the terminal device initiates a random access process to the target cell.

[0070] Phase 4: LTM Completion (Step 8)

[0071] In step 8, the terminal device sends an indication message indicating successful completion of LTM to the target cell.

[0072] Configured grant (CG) resource selection based on beam quality

[0073] In Rel-16 and previous protocol versions, terminal devices do not support data transmission in the RRC inactive state (RRC_INACTIVE state). When uplink or downlink data arrives, the terminal device needs to restore the RRC connection. After the data transmission is completed, the network device chooses to instruct the terminal device to re-enter the RRC_INACTIVE state. For terminal devices with small data volume and low transmission frequency, such state transitions will result in unnecessary power consumption and signaling overhead. Therefore, Rel-17 launched a project to support terminal devices to perform a small amount of data transmission process in the RRC_INACITVE state, namely small data transmission (SDT). SDT supports two data transmission schemes, namely small data transmission based on random access process (RA-SDT) and small data transmission based on pre-configured resources (CG-SDT, or SDT over Configured Grant). RA-SDT can also be called SDT based on random access channel (SDT over RACH).

[0074] One of the differences between RA-SDT and CG-SDT is whether the terminal device needs to send the first uplink transmission carrying the common control channel (CCCH) message to the network device through random access. For uplink transmission services with relatively certain data volume and period, the network device can configure a set of dedicated CG resources for the terminal device through the RRC Release message. When the conditions for triggering CG-SDT are met, the terminal device can directly use this set of CG resources to perform uplink data transmission, thereby eliminating the delay and signaling overhead caused by the random access process.

[0075] The random access process is used to establish uplink synchronization between the terminal device and the network device. Furthermore, based on the random access resource selected by the terminal device, the network device can also determine downlink beam information. Therefore, the design of the CG-SDT process needs to consider how to enable the terminal device and network device to exchange TA and downlink beam information without initiating a random access process.

[0076] For TA, the CG-SDT process restricts the use of terminal devices under the premise that the TA is valid. The criteria for judging whether the TA is valid include the following two criteria. First, whether the terminal device is still resident in the cell that receives the CG-SDT resource configuration when initiating SDT. Second, whether the TA timer is in the running state and whether the change in the reference signal receiving power (RSRP) exceeds the pre-configured RSRP threshold.

[0077] In order to indicate the downlink beam information to the network equipment, the CG-SDT resource configuration adopts a design method similar to the mutual correlation between random access resources and beam information. In other words, when configuring CG-SDT resources, the network equipment needs to clearly indicate the mapping relationship between each CG resource and the synchronization signal / physical broadcast channel block (SSB). The terminal device selects the CG-SDT resource corresponding to the SSB that meets the threshold to perform uplink data transmission, thereby helping the network equipment to determine the beam information for data transmission.

[0078] RACH-less LTM

[0079] The LTM cell handover command can indicate the target cell's TA and beam information (beam indication). After receiving the cell handover command containing TA and beam information, the terminal device can directly perform uplink transmission in the target cell without having to exchange TA and beam information with the network device through the random access process, thus reducing the interruption delay of the handover process. This LTM process is called RACH-less LTM.

[0080] The resources used by the terminal device to perform the first uplink transmission in the target cell include the uplink resources dynamically scheduled by the target cell through the physical downlink control channel (PDCCH); or the CG resources included in the candidate cell configuration.

[0081] The CG resources are configured in a manner similar to CG-SDT, that is, the CG resources are associated with the SSB, and the terminal device needs to perform the first uplink data transmission on the CG resources associated with the indicated beam (Configured grant can be used for RACH-less LTM, for the first UL data transmission to the target cell, the UE selects the configured grant occasion, which is associated with the beam indicated in the LTM MAC CE (as set by source cell)).

[0082] According to the above description, the LTM process is a cell switching process triggered by L1 / L2 signaling. In the LTM process, when the terminal device determines to switch to a certain LTM candidate cell, how to access the LTM candidate cell is a problem that needs to be solved. For example, during the LTM process or after the LTM process is completed, whether CG resources should be used, and how to use CG resources reasonably. For another example, if it is determined whether CG resources can be used to transmit the first uplink data. For another example, after the first uplink data is transmitted through the CG resource, and before the terminal device receives the acknowledgment (ACK) feedback from the network device for the first uplink data, whether new transmission, retransmission, and fallback (i.e., fall back to the method of initiating a random access process for cell access) can be performed. For another example, after the LTM process is completed, how should the terminal device handle the CG resources.

[0083] In response to one or more of the above-mentioned problems, the embodiments of the present application are described in detail below. The first embodiment below mainly focuses on the LTM switching process; the second embodiment mainly focuses on the process after the LTM process is completed.

[0084] Example 1:

[0085] Figure 4 is a schematic flow chart of a wireless communication method provided by Embodiment 1 of the present application. The method of Figure 4 includes step S410, that is, if the terminal device determines to switch to the first LTM candidate cell, the terminal device performs a first operation.

[0086] In some embodiments, the terminal device switching to the first LTM candidate cell may be triggered based on a first instruction. The first instruction may also be sometimes referred to as a cell switching command. The first instruction may be sent by the source cell.

[0087] In some embodiments, the first instruction may be a MAC CE instruction.

[0088] In some embodiments, the first instruction may include one or more of the following: an identity (ID) of the first LTM candidate cell, a TA, a joint transmission configuration indicator TCI state (Joint TCI state), an uplink / downlink TCI state (UL / DL TCI state), and a serving cell index.

[0089] In some embodiments, the first operation may include initiating a random access procedure.

[0090] In some embodiments, the first operation may include transmitting first uplink data in the first LTM candidate cell based on the first CG resource. The first CG resource is a CG resource that can be used in the LTM execution process. The first CG resource can be configured by the configuration information of the first LTM candidate cell. For example, the configuration information of the first LTM candidate cell may include configuration information of the first CG resource, and the configuration information of the first CG resource is used to configure the first CG resource. The transmission of the first uplink data can be the first uplink transmission of the terminal device in the first LTM candidate cell.

[0091] In some embodiments, the first uplink data may include one or more of the following: uplink user plane data, CCCH message, and MAC CE.

[0092] In some embodiments, the first operation may be determined based on one or more of the following information: configuration information of the first LTM candidate cell, beam measurement information, the first time, and the second time. For example, the terminal device may determine whether to use CG resources to perform the transmission of the first uplink data based on one or more of the above information.

[0093] The first time may be determined based on the time when the first instruction is received or the time when the LTM is executed. For example, the first time may be the time when the first instruction is received or the time when the LTM is executed.

[0094] The above-mentioned second time can be determined based on the time domain position corresponding to the CG resource associated with the first beam in the first CG resource.

[0095] In some embodiments, the first beam may be the beam indicated by the first instruction. It should be understood that the beam and the SSB may be associated, and thus the beam may be indicated or measured by indicating or measuring the SSB. Alternatively, the indication or measurement of the beam mentioned in various embodiments of the present application may be replaced with the indication or measurement of the SSB.

[0096] In some embodiments, the first beam may be a beam selected by the terminal device based on layer one measurement (or a beam selected by the terminal device based on layer one measurement during the LTM process).

[0097] In some embodiments, the second time may be equal to the time corresponding to the time domain position corresponding to the CG resource associated with the first beam in the first CG resource. For example, the second time may be equal to the time corresponding to the starting position, the ending position, or the middle position of the time domain position.

[0098] In some embodiments, the second time is a target transmission opportunity (i.e., a time corresponding to a transmission opportunity) corresponding to a CG resource associated with the first beam in the first CG resource. The target transmission opportunity may be the first transmission opportunity after the first time in the transmission opportunity of the CG resource associated with the first beam.

[0099] Several possible implementations of step S410 are given below.

[0100] Implementation method 1:

[0101] In implementation method 1, step S410 may include one or more of the following steps: if the configuration information of the first LTM candidate cell does not configure CG resources, the terminal device initiates a random access process (that is, the first operation is to initiate a random access process); and / or, if the configuration information of the first LTM candidate cell configures the first CG resources, the terminal device transmits the first uplink data based on the first CG resources (that is, the first operation is to transmit the first uplink data based on the first CG resources).

[0102] In some embodiments, when the terminal device determines to initiate a random access process, if the configuration information of the first LTM candidate cell configures CFRA resources, the terminal device initiates the CFRA process (or initiates the CFRA process preferentially).

[0103] In some embodiments, when the terminal device determines to initiate a random access procedure, if the configuration information of the first LTM candidate cell does not configure CFRA resources, the terminal device initiates a CBRA procedure.

[0104] In some embodiments, when the terminal device determines to initiate a random access procedure, the terminal device may initiate the random access procedure using random access resources associated with the first beam. The first beam is described above. Alternatively, the terminal device may re-execute the beam selection procedure.

[0105] Implementation 2:

[0106] In implementation method 2, step S410 may include one or more of the following steps: if the configuration information of the first LTM candidate cell does not configure the CG resources associated with the first beam (the introduction to the first beam can be found in the previous text), the terminal device initiates a random access process (that is, the first operation is to initiate a random access process); and / or, if the first CG resources configured by the first LTM candidate cell include the CG resources associated with the first beam, the terminal device transmits the first uplink data based on the CG resources associated with the first beam (that is, the first operation is to transmit the first uplink data based on the first CG resources). For example, if the configuration information of the first LTM candidate cell configures a group of CG resources, but none of the resources in this group are associated with the first beam, the terminal device initiates a random access process.

[0107] In some embodiments, when the terminal device determines to initiate a random access process, if the configuration information of the first LTM candidate cell configures CFRA resources, the terminal device initiates the CFRA process (or initiates the CFRA process preferentially).

[0108] In some embodiments, when the terminal device determines to initiate a random access procedure, if the configuration information of the first LTM candidate cell does not configure CFRA resources, the terminal device initiates a CBRA procedure.

[0109] In some embodiments, when the terminal device determines to initiate a random access procedure, the terminal device may initiate the random access procedure using random access resources associated with the first beam. Alternatively, the terminal device may re-execute the beam selection procedure.

[0110] Implementation 3:

[0111] In implementation method 3, step S410 may include one or more of the following steps: if the time interval between the second time and the first time (the first time and the second time can be referred to the previous introduction) is greater than the first threshold, the terminal device initiates a random access process (that is, the first operation is to initiate a random access process); and / or, if the time interval between the second time and the first time is less than or equal to the first threshold, the terminal device transmits the first uplink data based on the CG resource associated with the first beam in the first CG resource (that is, the first operation is to transmit the first uplink data based on the first CG resource).

[0112] Take Figure 5 as an example for illustration. Referring to Figure 5, the first time is the time of receiving the first instruction, and the second time is the time corresponding to the time domain position of the CG resource associated with the first beam (or the second time is the time at which the transmission opportunity of the CG resource associated with the first beam is located). If the time interval between the first time and the second time is greater than the time threshold T (corresponding to the above-mentioned first threshold), the terminal device can initiate a random access process.

[0113] In some embodiments, when the terminal device determines to initiate a random access process, if the configuration information of the first LTM candidate cell configures CFRA resources, the terminal device initiates the CFRA process (or initiates the CFRA process preferentially).

[0114] In some embodiments, when the terminal device determines to initiate a random access procedure, if the configuration information of the first LTM candidate cell does not configure CFRA resources, the terminal device initiates a CBRA procedure.

[0115] In some embodiments, when the terminal device determines to initiate a random access procedure, the terminal device may initiate the random access procedure using random access resources associated with the first beam. The first beam is described above. Alternatively, the terminal device may re-execute the beam selection procedure.

[0116] Implementation 4:

[0117] In implementation method 3, step S410 may include one of the following: before transmitting the first uplink data, if the first condition is met, the terminal device initiates a random access process; or, before transmitting the first uplink data, if the first condition is met, the terminal device transmits the first uplink data based on the CG resources associated with the second beam in the first CG resources.

[0118] In some embodiments, the first condition may be or indicate that the terminal device detects a change in the beam.

[0119] In some embodiments, the first condition may be determined based on beam measurement information. For example, the first condition may be associated with one or more of the following: beam measurement information for the first beam; and beam measurement information for the second beam. The second beam referred to herein may refer to another beam with a higher beam quality than the first beam as measured by the terminal device.

[0120] For example, the first condition includes one or more of the following: the beam quality of the first beam is less than or equal to a second threshold; the difference between the beam quality of the second beam and the beam quality of the first beam is greater than or equal to a third threshold; and the second beam is the beam with the best beam quality indicated by the beam measurement information.

[0121] As an example, if the beam quality of the first beam is less than or equal to the second threshold, the terminal device initiates a random access process; and / or, if the beam quality of the first beam is greater than the second threshold, the terminal device transmits first uplink data based on the CG resources associated with the first beam in the first CG resources.

[0122] As another example, if the difference between the beam quality of the second beam and the beam quality of the first beam is greater than or equal to a third threshold, the terminal device transmits first uplink data based on the CG resources associated with the second beam in the first CG resources; and / or, if the difference between the beam quality of the second beam and the beam quality of the first beam is greater than or equal to the third threshold, the terminal device initiates a random access process, or the terminal device transmits first uplink data based on the CG resources associated with the second beam in the first CG resources.

[0123] As another example, if the second beam is the beam with the best beam quality indicated by the beam measurement information, the terminal device transmits the first uplink data based on the CG resources associated with the second beam in the first CG resources.

[0124] In some embodiments, before determining whether the first condition is met, the terminal device needs to first determine whether there is a CG resource associated with the second beam in the first CG resource. If there is no CG resource associated with the second beam in the first CG resource, the terminal device can initiate a random access process.

[0125] The foregoing describes in detail how to determine whether to transmit the first uplink data based on the first CG resource. The following describes in detail the possible behavior of the terminal device after the terminal device transmits the first uplink data based on the first CG resource. It should be understood that the content described below can be combined with the content described above or can be independent of each other.

[0126] In some embodiments, the method of Figure 4 may further include: after transmitting the first uplink data based on the first CG resource, the terminal device starts a first timer. During the running of the first timer, the terminal device does not use (or cannot use) other CG resources other than the first CG resource to transmit the second uplink data in the first LTM candidate cell (the second uplink data may refer to a new transmission or initial transmission of another uplink data).

[0127] In some embodiments, the method of Figure 4 may further include: after transmitting the first uplink data based on the first CG resource, the terminal device starts a second timer; if the second timer times out, the terminal device retransmits the first uplink data.

[0128] In some embodiments, the first uplink data is retransmitted based on the second CG resource, and the second CG resource is associated with the same HARQ process and / or beam as the first CG resource. In other words, the CG resource for retransmitting the first uplink data may be the same HARQ process and / or beam associated with the CG resource for previously transmitting the first uplink data.

[0129] In some embodiments, the method of Figure 4 may further include: after transmitting the first uplink data based on the first CG resource, the terminal device retransmits the first uplink data on a second CG resource; wherein the second CG resource is a CG resource adjacent to the first CG resource in the target CG resource, and the target CG resource is associated with the same HARQ process and / or beam as the first CG resource. In this embodiment, the terminal device does not need to retransmit the first uplink data based on the second timer mentioned above, but can transmit the first uplink data on each of two adjacent CG resources associated with the same HARQ process and / or beam.

[0130] In some embodiments, the method of FIG4 may further include: if the first timer times out and the terminal device does not receive confirmation information (ACK) of the first uplink data, the terminal device performing a second operation. The second operation includes one of the following: sending first indication information (used to indicate that the LTM process failed) to the RRC layer of the terminal device; and initiating a random access process.

[0131] For example, if the first timer times out and the terminal device does not receive confirmation information of the first uplink data, the terminal device (the MAC layer) sends a first indication message to the RRC layer of the terminal device, indicating that the LTM process has failed. After receiving the first indication message, the RRC layer of the terminal device stops the third timer (such as the T304 timer for cell switching, or a timer with a similar function to T304) and triggers the RRC connection reestablishment process.

[0132] For another example, if the first timer times out and the terminal device does not receive confirmation information of the first uplink data, the terminal device initiates a random access process.

[0133] In some embodiments, the method of FIG4 may further include: if a third timer maintained by the RRC layer of the terminal device (such as a T304 timer for cell switching, or a timer having a similar function to T304) times out, and the terminal device does not receive confirmation information of the first uplink data, then the terminal device confirms that the LTM process has failed. In this embodiment, the terminal device may not start the second timer mentioned above.

[0134] Example 2:

[0135] Figure 6 is a flow chart of a wireless communication method provided in Embodiment 2 of the present application. The method in Figure 6 may include step S610, that is, after the terminal device successfully accesses the first LTM candidate cell based on the first CG resource, the terminal device retains the first CG resource or releases the first CG resource.

[0136] In some embodiments, the configuration information of the first CG resource (which may be included in the configuration information of the first LTM candidate cell) includes one or more of the following information: first indication information, used to indicate whether the terminal device releases the first CG resource after successfully accessing the first LTM candidate cell; and second indication information, used to indicate whether the terminal device retains the first CG resource after successfully accessing the first LTM candidate cell. Accordingly, before the terminal device successfully accesses the first LTM candidate cell based on the first CG resource, the network device may send the configuration information of the first LTM candidate cell to the terminal device. The configuration information of the first LTM candidate cell includes the configuration information of the first CG resource, and the configuration information of the first CG resource may include the first indication information and / or the second indication information mentioned above.

[0137] Example 2.1: The terminal device releases the first CG resource

[0138] In some embodiments, the aforementioned release of the first CG resource by the terminal device may include: the MAC layer of the terminal device releasing the first CG resource; and / or the RRC layer of the terminal device releasing the first CG resource. For example, the terminal device may determine, based on the first indication information mentioned above, whether to perform the release operation of the first CG resource after successfully accessing the first LTM candidate cell based on the first CG resource. For another example, the terminal device may perform the release operation of the first CG resource by default after successfully accessing the first LTM candidate cell based on the first CG resource.

[0139] In some embodiments, after receiving the first confirmation information, the MAC layer of the terminal device releases the first CG resource. The first confirmation information may also be referred to as a confirmation indication, which may refer to an ACK corresponding to the first uplink data transmitted based on the first CG resource (i.e., the data transmitted by the first uplink transmission). Furthermore, in some embodiments, the MAC layer of the terminal device sends a second indication information to the RRC layer. The second indication information may be used to indicate that the MAC layer has released the first CG resource.

[0140] In some embodiments, after receiving the first confirmation information, the MAC layer of the terminal device may send third indication information to the RRC layer. The third indication information may be used to indicate that the LTM process is successfully completed. After receiving the third indication information, the RRC layer of the terminal device may send fourth indication information to the MAC layer, and the fourth indication information is used to instruct the MAC layer to release the first CG resource.

[0141] Example 2.2: The terminal device reserves the first CG resource

[0142] In some embodiments, the RRC layer of the terminal device retains the first CG resources, and the MAC layer of the terminal device releases the first CG resources.

[0143] In some embodiments, both the RRC layer and the MAC layer of the terminal device retain the first CG resources.

[0144] In some embodiments, the terminal device can determine whether to retain the first CG resource after successfully accessing the first LTM candidate cell based on the second indication information mentioned above.

[0145] In some embodiments, after successfully accessing the first LTM candidate cell, the terminal device retains the first CG resource by default.

[0146] In some embodiments, the CG resource associated with the working beam of the terminal device in the first CG resource can be used to perform data transmission, such as transmission of uplink data. For example, the terminal device can perform data transmission on the transmission opportunity corresponding to the CG resource associated with the working beam.

[0147] In some embodiments, CG resources in the first CG resources that are not associated with the working beam can be released or suspended.

[0148] In some embodiments, the aforementioned working beam of the terminal device may be a beam indicated by a first instruction. The first instruction may be used to instruct the terminal device to switch to the first LTM candidate cell. For a detailed description of the first instruction, see Example 1.

[0149] In some embodiments, the working beam of the terminal device mentioned above may be a beam selected by the terminal device based on layer one (L1) measurement during the LTM process.

[0150] In some embodiments, the aforementioned working beam of the terminal device may be a beam that is re-determined for the terminal device through a beam management (BM) process in the first LTM candidate cell. In other words, the working beam of the terminal device may be a beam that is dynamically updated for the terminal device through a BM process in the first LTM candidate cell.

[0151] For example, if the working beam of the terminal device in the first LTM candidate cell is beam 2, the terminal device can use the transmission opportunity (CG occasion) corresponding to the CG resource associated with beam 2 in the first CG resource to perform data transmission. At the next moment, assuming that the first LTM candidate cell updates the working beam of the terminal device to beam 3, the terminal device can accordingly use the transmission opportunity (CG occasion) corresponding to the CG resource associated with beam 3 in the first CG resource to perform data transmission.

[0152] In some embodiments, the first CG resource may be used for a target process. The target process may include one or more of the following: a beam management process triggered by a terminal device, a mobile originated SDT (MO-SDT), and a mobile terminated SDT (MT-SDT).

[0153] In some embodiments, the first CG resource is not available for the target process. The target process may include one or more of the following: a beam management process triggered by a terminal device, MO-SDT, and MT-SDT.

[0154] In some embodiments, whether the first CG resource is available for the above-mentioned target process can be determined based on the indication information of the network device.

[0155] In some embodiments, the method of FIG5 may further include: the terminal device receiving a second instruction sent by the network device. The second instruction may be used to indicate one or more of the following: whether to resume use of the first CG resource; whether to activate the first CG resource; and whether to disassociate the first CG resource from the beam.

[0156] In some embodiments, before the terminal device receives the second instruction sent by the network device, the terminal device suspends the first CG resource.

[0157] In some embodiments, the second instruction may be carried by one of the following: downlink control information (DCI), MAC CE, or radio resource control (RRC) message.

[0158] In some embodiments, after successfully accessing the first LTM candidate cell, the terminal device can release the association between the first CG resource and the beam.

[0159] In some embodiments, the operation of releasing the association between the first CG resource and the beam may be: an operation instructed by the network device after the terminal device successfully accesses the first LTM candidate cell. The network device may, for example, perform the instruction based on the second signaling mentioned above.

[0160] In some embodiments, the operation of disassociating the first CG resource from the beam can be: a default operation of the terminal device after successfully accessing the first LTM candidate cell, without requiring additional instructions from the network device. In other words, after successfully accessing the first LTM candidate cell, the terminal device can use the first CG resource to perform uplink data transmission without complying with the association between the CG resource and the beam.

[0161] In some embodiments, the operation of releasing the association between the first CG resource and the beam may be: an operation indicated by the third indication information included in the configuration information of the first CG resource. Accordingly, before the terminal device successfully accesses the first LTM candidate cell, the network device sends the configuration information of the first LTM candidate cell to the terminal device, and the configuration information of the first LTM candidate cell includes the configuration information of the first CG resource, and the configuration information of the first CG resource may include the above-mentioned third indication information.

[0162] The method embodiment of the present application is described in detail above in conjunction with Figures 1 to 6 . The device embodiment of the present application is described in detail below in conjunction with Figures 7 to 10 . It should be understood that the description of the method embodiment corresponds to the description of the device embodiment. Therefore, for parts not described in detail, reference can be made to the above method embodiment.

[0163] FIG7 is a schematic structural diagram of a terminal device provided by an embodiment of the present application. The terminal device 700 in FIG7 may include a first processing module 710. The first processing module 710 may be configured to perform a first operation if the terminal device determines to switch to a first LTM candidate cell; wherein the first operation includes one or more of the following: initiating a random access process; transmitting first uplink data in the first LTM candidate cell based on a first CG resource, where the transmission of the first uplink data is the first uplink transmission of the terminal device in the first LTM candidate cell.

[0164] In some embodiments, the first operation is determined based on one or more of the following information: configuration information of the first LTM candidate cell; beam measurement information; a first time, determined based on the reception time of the first instruction or the LTM execution time, the first instruction is used to instruct the terminal device to switch to the first LTM candidate cell; and a second time, determined based on the time domain position corresponding to the CG resource associated with the first beam in the first CG resource, the first beam is the beam indicated by the first instruction or the beam selected by the terminal device based on layer one measurement.

[0165] In some embodiments, the first processing module is used to initiate a random access process if the configuration information of the first LTM candidate cell does not configure CG resources; and / or, if the configuration information of the first LTM candidate cell configures the first CG resources, the terminal device transmits the first uplink data based on the first CG resources.

[0166] In some embodiments, the first processing module is used to initiate a random access process if the configuration information of the first LTM candidate cell does not configure the CG resources associated with the first beam; and / or, if the first CG resources configured by the first LTM candidate cell include the CG resources associated with the first beam, the terminal device transmits the first uplink data based on the CG resources associated with the first beam.

[0167] In some embodiments, the first processing module is used to initiate a random access process if the time interval between the second time and the first time is greater than a first threshold; and / or, if the time interval between the second time and the first time is less than or equal to the first threshold, the terminal device transmits the first uplink data based on the CG resource associated with the first beam in the first CG resource.

[0168] In some embodiments, the first processing module is used to perform one of the following operations before transmitting the first uplink data if a first condition is met: initiating a random access process; and transmitting the first uplink data based on a CG resource associated with the second beam in the first CG resource; wherein the first condition is associated with one or more of the following: beam measurement information of the first beam; and beam measurement information of the second beam, wherein the beam quality of the second beam is higher than the beam quality of the first beam.

[0169] In some embodiments, the first condition includes one or more of the following: the beam quality of the first beam is less than or equal to a second threshold; the difference between the beam quality of the second beam and the beam quality of the first beam is greater than or equal to a third threshold; and the second beam is the beam with the best beam quality indicated by the beam measurement information.

[0170] In some embodiments, the terminal device also includes: a second processing module, used to start a first timer after transmitting the first uplink data based on the first CG resource; wherein, during the operation of the first timer, the terminal device does not use other CG resources except the first CG resource to transmit the second uplink data in the first LTM candidate cell.

[0171] In some embodiments, the terminal device also includes: a third processing module, used to perform a second operation if the first timer times out and the terminal device has not received confirmation information of the first uplink data; wherein the second operation includes one of the following: sending a first indication information to the RRC layer of the terminal device, the first indication information being used to indicate that the LTM process has failed; and initiating a random access process.

[0172] In some embodiments, the terminal device further includes: a fourth processing module, configured to control the RRC layer of the terminal device to stop a third timer and trigger an RRC connection reconstruction process after receiving the first indication information.

[0173] In some embodiments, the terminal device also includes: a fifth processing module, used to start a second timer after transmitting the first uplink data based on the first CG resource; if the second timer times out, retransmit the first uplink data.

[0174] In some embodiments, the first uplink data is retransmitted based on a second CG resource, and the second CG resource is associated with the same HARQ process and / or beam as the first CG resource.

[0175] In some embodiments, the terminal device further includes: a sixth processing module, configured to confirm that the LTM process has failed if a third timer maintained by the RRC layer of the terminal device times out and the terminal device has not received confirmation information of the first uplink data.

[0176] In some embodiments, the terminal device also includes: a communication module for retransmitting the first uplink data on a second CG resource after transmitting the first uplink data based on the first CG resource; wherein the second CG resource is a CG resource in the target CG resource that is adjacent to the first CG resource, and the target CG resource is associated with the same HARQ process and / or beam as the first CG resource.

[0177] In some embodiments, the first processing module is used to initiate a CFRA process if the configuration information of the first LTM candidate cell configures non-contention random access (CFRA) resources; and / or, if the configuration information of the first LTM candidate cell does not configure CFRA resources, the terminal device initiates a contention based random access (CBRA) process.

[0178] In some embodiments, the first processing module is used to initiate a random access process using random access resources associated with the first beam; wherein, the first beam is a beam indicated by a first instruction or a beam selected by the terminal device based on layer one measurement, and the first instruction is used to instruct the terminal device to switch to the first LTM candidate cell.

[0179] In some embodiments, the terminal device further includes: a seventh processing module, configured to re-execute a beam selection process before the terminal device initiates a random access process.

[0180] FIG8 is a schematic diagram of the structure of a terminal device provided by another embodiment of the present application. The terminal device 800 of FIG8 may include a first processing module 810. The first processing module 810 is configured to retain or release the first CG resource after the terminal device successfully accesses the first LTM candidate cell based on the first CG resource.

[0181] In some embodiments, the configuration information of the first CG resource includes one or more of the following information: first indication information, used to indicate whether the terminal device releases the first CG resource after successfully accessing the first LTM candidate cell; and second indication information, used to indicate whether the terminal device retains the first CG resource after successfully accessing the first LTM candidate cell.

[0182] In some embodiments, the first processing module is used to control the MAC layer of the terminal device to release the first CG resources; and / or control the RRC layer of the terminal device to release the first CG resources.

[0183] In some embodiments, the first processing module is used to control the MAC layer of the terminal device to release the first CG resource after receiving the first confirmation information; and / or control the MAC layer of the terminal device to send second indication information to the RRC layer, and the second indication information is used to indicate that the MAC layer has released the first CG resource.

[0184] In some embodiments, the first processing module is used to control the MAC layer of the terminal device to send third indication information to the RRC layer after receiving the first confirmation information, and the third indication information is used to indicate that the LTM process is successfully completed; after receiving the third indication information, the RRC layer of the terminal device is used to control the RRC layer to send fourth indication information to the MAC layer, and the fourth indication information is used to instruct the MAC layer to release the first CG resource.

[0185] In some embodiments, the first processing module is used to control the RRC layer of the terminal device to retain the first CG resources, and control the MAC layer of the terminal device to release the first CG resources; or, control both the RRC layer and the MAC layer of the terminal device to retain the first CG resources.

[0186] In some embodiments, while retaining the first CG resources, the CG resources in the first CG resources that are associated with the working beam of the terminal device can be used for transmission of uplink data.

[0187] In some embodiments, CG resources in the first CG resources that are not associated with the working beam are released or suspended.

[0188] In some embodiments, the working beam includes one of the following: a beam indicated by a first instruction, wherein the first instruction is used to instruct the terminal device to switch to the first LTM candidate cell; a beam selected by the terminal device based on layer one measurement during the LTM process; and a beam re-determined for the terminal device through a beam management process in the first LTM candidate cell.

[0189] In some embodiments, while retaining the first CG resource, the first CG resource is used or not used for a target process; wherein the target process includes one or more of the following: a beam management process triggered by the terminal device; MO-SDT; and MT-SDT.

[0190] In some embodiments, whether the first CG resource is used for the target process is determined based on indication information of a network device.

[0191] In some embodiments, the terminal device also includes: a communication module for receiving a second instruction sent by a network device, wherein the second instruction is used to indicate one or more of the following: whether to resume use of the first CG resource; whether to activate the first CG resource; and whether to release the association between the first CG resource and the beam.

[0192] In some embodiments, the terminal device further includes: a second processing module, configured to suspend the first CG resource before the terminal device receives a second instruction sent by the network device.

[0193] In some embodiments, the terminal device further includes: a third processing module, configured to release the association between the first CG resource and the beam after successfully accessing the first LTM candidate cell.

[0194] In some embodiments, the operation of releasing the association between the first CG resource and the beam is one of the following: the default operation of the terminal device after successfully accessing the first LTM candidate cell; the operation indicated by the third indication information included in the configuration information of the first CG resource; and the operation indicated by the network device after the terminal device successfully accesses the first LTM candidate cell.

[0195] Figure 9 is a structural diagram of a network device provided in an embodiment of the present application. The network device 900 in Figure 9 may include a communication module 910. The communication module 910 may be used to send configuration information of a first LTM candidate cell to a terminal device, the configuration information of the first LTM candidate cell including configuration information of a first CG resource, the configuration information of the first CG resource including one or more of the following information: first indication information, used to indicate whether the terminal device releases the first CG resource after successfully accessing the first LTM candidate cell; second indication information, used to indicate whether the terminal device retains the first CG resource after successfully accessing the first LTM candidate cell; and third indication information, used to indicate that the terminal device releases the association between the first CG resource and the beam after successfully accessing the first LTM candidate cell.

[0196] In some embodiments, the releasing of the first CG resource includes: the MAC layer of the terminal device releasing the first CG resource; and / or the RRC layer of the terminal device releasing the first CG resource.

[0197] In some embodiments, the retaining of the first CG resource includes: the RRC layer of the terminal device retaining the first CG resource, and the MAC layer of the terminal device releasing the first CG resource; or, both the RRC layer and the MAC layer of the terminal device retain the first CG resource.

[0198] In some embodiments, while retaining the first CG resource, the CG resource in the first CG resource associated with the working beam of the terminal device is used for transmission of uplink data.

[0199] In some embodiments, CG resources in the first CG resources that are not associated with the working beam are released or suspended.

[0200] In some embodiments, the working beam includes one of the following: a beam indicated by a first instruction, wherein the first instruction is used to instruct the terminal device to switch to the first LTM candidate cell; a beam selected by the terminal device based on layer one measurement during the LTM process; and a beam re-determined for the terminal device through a beam management process in the first LTM candidate cell.

[0201] In some embodiments, while retaining the first CG resource, the first CG resource is used or not used for a target process; wherein the target process includes one or more of the following: a beam management process triggered by the terminal device; MO-SDT; and MT-SDT.

[0202] In some embodiments, whether the first CG resource is used for the target process is determined based on indication information of a network device.

[0203] FIG10 is a schematic block diagram of an apparatus according to an embodiment of the present application. The dotted lines in FIG10 indicate that the unit or module is optional. Apparatus 1000 may be used to implement the method described in the above method embodiment. Apparatus 1000 may be a chip, a terminal device, or a network device.

[0204] The device 1000 may include one or more processors 1010. The processor 1010 may support the device 1000 to implement the method described in the method embodiment above. The processor 1010 may be a general-purpose processor or a special-purpose processor. For example, the processor may be a central processing unit (CPU). Alternatively, the processor may be another general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, etc. The general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc.

[0205] The apparatus 1000 may further include one or more memories 1020. The memories 1020 store programs that can be executed by the processor 1010, causing the processor 1010 to perform the methods described in the above method embodiments. The memories 1020 may be independent of the processor 1010 or integrated into the processor 1010.

[0206] The apparatus 1000 may further include a transceiver 1030. The processor 1010 may communicate with other devices or chips via the transceiver 1030. For example, the processor 1010 may transmit and receive data with other devices or chips via the transceiver 1030.

[0207] The present application also provides a computer-readable storage medium for storing a program. The computer-readable storage medium can be applied to a terminal device or network device provided in the present application, and the program enables a computer to execute the method performed by the terminal device or network device in each embodiment of the present application.

[0208] The present application also provides a computer program product. The computer program product includes a program. The computer program product can be applied to a terminal device or network device provided in the present application, and the program causes a computer to execute the method performed by the terminal device or network device in each embodiment of the present application.

[0209] The present application also provides a computer program that can be applied to a terminal device or network device provided in the present application, and enables a computer to execute the method performed by the terminal device or network device in each embodiment of the present application.

[0210] It should be understood that the terms "system" and "network" in this application can be used interchangeably. In addition, the terms used in this application are only used to explain the specific embodiments of this application and are not intended to limit this application. The terms "first", "second", "third", and "fourth" in the specification and claims of this application and the accompanying drawings are used to distinguish different objects rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0211] In the embodiments of this application, the term "indication" may refer to a direct indication, an indirect indication, or an indication of an association. For example, "A indicates B" may refer to a direct indication of B, e.g., B can obtain information through A; it may refer to an indirect indication of B, e.g., A indicates C, e.g., B can obtain information through C; or it may refer to an association between A and B.

[0212] In the embodiment of the present application, "B corresponding to A" means that B is associated with A and B can be determined based on A. However, it should be understood that determining B based on A does not mean determining B based solely on A, but B can also be determined based on A and / or other information.

[0213] In the embodiments of the present application, the term "corresponding" may indicate a direct or indirect correspondence between the two, or an association relationship between the two, or a relationship between indication and indication, configuration and configuration, etc.

[0214] In the embodiments of the present application, "pre-definition" or "pre-configuration" may be implemented by pre-storing corresponding codes, tables, or other methods that can be used to indicate relevant information in a device (e.g., a terminal device and a network device). The present application does not limit the specific implementation method. For example, pre-definition may refer to information defined in a protocol.

[0215] In the embodiments of the present application, the “protocol” may refer to a standard protocol in the communications field, for example, it may include an LTE protocol, an NR protocol, and related protocols used in future communication systems, and the present application does not limit this.

[0216] In the embodiments of this application, the term "and / or" is simply a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0217] In various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0218] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0219] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0220] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0221] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center via a wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) method. The computer-readable storage medium can be any available medium that can be read by a computer or a data storage device such as a server or data center that includes one or more available media integrated therein. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a digital versatile disc (DVD)), or a semiconductor medium (eg, a solid state disk (SSD)).

[0222] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A wireless communication method, characterized in that: include: If the terminal device determines to switch to the first layer 1 / layer 2 triggered mobility LTM candidate cell, the terminal device performs a first operation; The first operation includes one or more of the following: Initiate a random access process; Based on the first configuration, the CG resources are authorized to transmit the first uplink data in the first LTM candidate cell. The transmission of the first uplink data is the first uplink transmission of the terminal device in the first LTM candidate cell.

2. The method according to claim 1, characterized in that The first operation is determined based on one or more of the following information: configuration information of the first LTM candidate cell; Beam measurement information; A first time is determined based on a reception time of a first instruction or an LTM execution time, the first instruction being used to instruct the terminal device to switch to the first LTM candidate cell; as well as The second time is determined based on the time domain position corresponding to the CG resource associated with the first beam in the first CG resource, where the first beam is the beam indicated by the first instruction or the beam selected by the terminal device based on layer one measurement.

3. The method according to claim 2, characterized in that The terminal device performs a first operation, including: If the configuration information of the first LTM candidate cell does not configure CG resources, the terminal device initiates a random access process; and / or If the configuration information of the first LTM candidate cell configures the first CG resource, the terminal device transmits the first uplink data based on the first CG resource.

4. The method according to claim 2, characterized in that: The terminal device performs a first operation, including: If the configuration information of the first LTM candidate cell does not configure the CG resources associated with the first beam, the terminal device initiates a random access process; and / or If the first CG resources configured by the first LTM candidate cell include CG resources associated with the first beam, the terminal device transmits the first uplink data based on the CG resources associated with the first beam.

5. The method according to claim 2, characterized in that: The terminal device performs a first operation, including: If the time interval between the second time and the first time is greater than a first threshold, the terminal device initiates a random access process; and / or If the time interval between the second time and the first time is less than or equal to the first threshold, the terminal device transmits the first uplink data based on the CG resources associated with the first beam in the first CG resources.

6. The method according to claim 2, characterized in that The terminal device performs a first operation, including: Before transmitting the first uplink data, if the first condition is met, the terminal device performs one of the following operations: Initiating a random access procedure; and Transmitting the first uplink data based on a CG resource associated with a second beam in the first CG resource; The first condition is associated with one or more of the following: beam measurement information of the first beam; and The beam measurement information of the second beam is higher than the beam quality of the first beam.

7. The method according to claim 6, characterized in that The first condition includes one or more of the following: The beam quality of the first beam is less than or equal to a second threshold; A difference between the beam quality of the second beam and the beam quality of the first beam is greater than or equal to a third threshold; as well as The second beam is a beam with the best beam quality indicated by the beam measurement information.

8. The method according to any one of claims 1 to 7, characterized in that The method further comprises: After transmitting the first uplink data based on the first CG resource, the terminal device starts a first timer; During the operation of the first timer, the terminal device does not use other CG resources except the first CG resources to transmit the second uplink data in the first LTM candidate cell.

9. The method according to claim 8, characterized in that The method further comprises: If the first timer times out and the terminal device does not receive confirmation information of the first uplink data, the terminal device performs a second operation; The second operation includes one of the following: Sending first indication information to the radio resource control RRC layer of the terminal device, wherein the first indication information is used to indicate that the LTM Process failure; and Initiate a random access procedure.

10. The method according to claim 9, characterized in that The method further comprises: After receiving the first indication information, the RRC layer of the terminal device stops the third timer and triggers the RRC connection reconstruction process.

11. The method according to any one of claims 1 to 10, characterized in that The method further comprises: After transmitting the first uplink data based on the first CG resource, the terminal device starts a second timer; If the second timer times out, the terminal device retransmits the first uplink data.

12. The method according to claim 11, characterized in that The first uplink data is retransmitted based on a second CG resource, and the second CG resource is associated with the same hybrid repeat automatic request HARQ process and / or beam as the first CG resource.

13. The method according to claim 11 or 12, characterized in that: The method further comprises: If the third timer maintained by the RRC layer of the terminal device times out and the terminal device has not received confirmation information of the first uplink data, the terminal device confirms that the LTM process has failed.

14. The method according to any one of claims 1 to 10, characterized in that The method further comprises: After transmitting the first uplink data based on the first CG resource, the terminal device retransmits the first uplink data on a second CG resource; The second CG resource is a CG resource in the target CG resource that is adjacent to the first CG resource, and the target CG resource is associated with the same HARQ process and / or beam as the first CG resource.

15. The method according to any one of claims 1 to 14, characterized in that The terminal device initiates a random access process, including: If the configuration information of the first LTM candidate cell configures a non-competitive random access CFRA resource, the terminal device initiates a CFRA process; and / or If the configuration information of the first LTM candidate cell does not configure CFRA resources, the terminal device initiates a contention-based random access CBRA process.

16. The method according to any one of claims 1 to 15, characterized in that The terminal device initiates a random access process, including: The terminal device initiates a random access process using the random access resources associated with the first beam; The first beam is a beam indicated by a first instruction or a beam selected by the terminal device based on layer one measurement, and the first instruction is used to instruct the terminal device to switch to the first LTM candidate cell.

17. The method according to any one of claims 1 to 15, characterized in that Before the terminal device initiates a random access process, the method further includes: The terminal device re-executes the beam selection process.

18. A wireless communication method, characterized in that: include: After the terminal device successfully accesses the first layer 1 / layer 2 triggered mobility LTM candidate cell based on the first configuration authorized CG resources, the terminal device retains the first CG resources or releases the first CG resources.

19. The method according to claim 18, characterized in that The configuration information of the first CG resource includes one or more of the following information: The first indication information is used to indicate whether the terminal device releases the first CG resource after successfully accessing the first LTM candidate cell; as well as The second indication information is used to indicate whether the terminal device retains the first CG resource after successfully accessing the first LTM candidate cell.

20. The method according to claim 18 or 19, characterized in that The terminal device releases the first CG resource, including: The media access control MAC layer of the terminal device releases the first CG resource; and / or The radio resource control RRC layer of the terminal device releases the first CG resources.

21. The method according to any one of claims 18 to 20, characterized in that The terminal device releases the first CG resource, including: After receiving the first confirmation information, the MAC layer of the terminal device releases the first CG resource; and / or The MAC layer of the terminal device sends second indication information to the RRC layer, where the second indication information is used to indicate that the MAC layer has released the first CG resources.

22. The method according to any one of claims 18 to 20, characterized in that The terminal device releases the first CG resource, including: After receiving the first confirmation information, the MAC layer of the terminal device sends third indication information to the RRC layer, where the third indication information is used to indicate that the LTM process is successfully completed; After receiving the third indication information, the RRC layer of the terminal device sends fourth indication information to the MAC layer, and the fourth indication information is used to instruct the MAC layer to release the first CG resources.

23. The method according to claim 18, characterized in that The terminal device retains the first CG resource, including: The RRC layer of the terminal device retains the first CG resource, and the MAC layer of the terminal device releases the first CG resource; or, Both the RRC layer and the MAC layer of the terminal device retain the first CG resources.

24. The method according to claim 18 or 23, characterized in that While retaining the first CG resources, the CG resources in the first CG resources that are associated with the working beam of the terminal device can be used for transmission of uplink data.

25. The method according to claim 24, characterized in that The CG resources in the first CG resources that are not associated with the working beam are released or suspended.

26. The method according to claim 24 or 25, characterized in that The working beam includes one of the following: A beam indicated by a first instruction, wherein the first instruction is used to instruct the terminal device to switch to the first LTM candidate cell; The terminal device selects a beam based on layer one measurement during the LTM process; and The beam is re-determined for the terminal device through the beam management process in the first LTM candidate cell.

27. The method according to claim 18 or 23, characterized in that In a case where the first CG resource is reserved, the first CG resource is used or not used for a target process; The target process includes one or more of the following: The beam management process triggered by the terminal device; Mobile originated small data transfer, MO-SDT; and Mobile Terminated Small Data Transfer MT-SDT.

28. The method according to claim 27, characterized in that Whether the first CG resource is used for the target process is determined based on the indication information of the network device.

29. The method according to claim 18 or 23, characterized in that The method further comprises: The terminal device receives a second instruction sent by the network device, where the second instruction is used to indicate one or more of the following: Whether to resume using the first CG resource; whether to activate the first CG resource; and Whether to release the association between the first CG resource and the beam.

30. The method according to claim 29, characterized in that Before the terminal device receives the second instruction sent by the network device, the method further includes: The terminal device suspends the first CG resource.

31. The method according to claim 18 or 23, characterized in that The method further comprises: After successfully accessing the first LTM candidate cell, the terminal device releases the association between the first CG resource and the beam.

32. The method according to claim 31, characterized in that The operation of releasing the association relationship between the first CG resource and the beam is one of the following: The default operation of the terminal device after successfully accessing the first LTM candidate cell; The operation indicated by the third indication information included in the configuration information of the first CG resource; as well as The operations instructed by the network device after the terminal device successfully accesses the first LTM candidate cell.

33. A wireless communication method, characterized in that: include: The network device sends configuration information of a first layer 1 / layer 2 triggered mobility LTM candidate cell to the terminal device, where the configuration information of the first LTM candidate cell includes configuration information of a first configuration authorization CG resource, and the configuration information of the first CG resource includes one or more of the following information: The first indication information is used to indicate whether the terminal device releases the first CG resource after successfully accessing the first LTM candidate cell; The second indication information is used to indicate whether the terminal device retains the first CG resource after successfully accessing the first LTM candidate cell; as well as The third indication information is used to instruct the terminal device to release the association between the first CG resource and the beam after successfully accessing the first LTM candidate cell.

34. The method according to claim 33, characterized in that The releasing the first CG resource comprises: The media access control MAC layer of the terminal device releases the first CG resource; and / or The radio resource control RRC layer of the terminal device releases the first CG resources.

35. The method according to claim 33, characterized in that The retaining the first CG resource includes: The RRC layer of the terminal device retains the first CG resource, and the MAC layer of the terminal device releases the first CG resource; or, Both the RRC layer and the MAC layer of the terminal device retain the first CG resources.

36. The method according to claim 33 or 35, characterized in that While retaining the first CG resources, the CG resources in the first CG resources that are associated with the working beam of the terminal device are used for transmission of uplink data.

37. The method according to claim 36, characterized in that The CG resources in the first CG resources that are not associated with the working beam are released or suspended.

38. The method according to claim 36 or 37, characterized in that The working beam includes one of the following: A beam indicated by a first instruction, wherein the first instruction is used to instruct the terminal device to switch to the first LTM candidate cell; The terminal device selects a beam based on layer one measurement during the LTM process; and The beam is re-determined for the terminal device through the beam management process in the first LTM candidate cell.

39. The method according to claim 33 or 35, characterized in that In a case where the first CG resource is reserved, the first CG resource is used or not used for a target process; The target process includes one or more of the following: The beam management process triggered by the terminal device; Mobile originated small data transfer, MO-SDT; and Mobile Terminated Small Data Transfer MT-SDT.

40. The method according to claim 39, characterized in that Whether the first CG resource is used for the target process is determined based on the indication information of the network device.

41. A terminal device, characterized in that: include: A first processing module, configured to perform a first operation if the terminal device determines to switch to a first layer 1 / layer 2 triggered mobility LTM candidate cell; The first operation includes one or more of the following: Initiate a random access process; Based on the first configuration, the CG resources are authorized to transmit the first uplink data in the first LTM candidate cell. The transmission of the first uplink data is the first uplink transmission of the terminal device in the first LTM candidate cell.

42. The terminal device according to claim 41, characterized in that: The first operation is determined based on one or more of the following information: configuration information of the first LTM candidate cell; Beam measurement information; A first time is determined based on a reception time of a first instruction or an LTM execution time, the first instruction being used to instruct the terminal device to switch to the first LTM candidate cell; as well as The second time is determined based on the time domain position corresponding to the CG resource associated with the first beam in the first CG resource, where the first beam is the beam indicated by the first instruction or the beam selected by the terminal device based on layer one measurement.

43. The terminal device according to claim 42, characterized in that: The first processing module is used to initiate a random access process if the configuration information of the first LTM candidate cell does not configure CG resources; and / or, if the configuration information of the first LTM candidate cell configures the first CG resources, transmit the first uplink data based on the first CG resources.

44. The terminal device according to claim 42, characterized in that: The first processing module is used to initiate a random access process if the configuration information of the first LTM candidate cell does not configure the CG resources associated with the first beam; and / or, if the first CG resources configured by the first LTM candidate cell include the CG resources associated with the first beam, transmit the first uplink data based on the CG resources associated with the first beam.

45. The terminal device according to claim 42, characterized in that: The first processing module is used to initiate a random access process if the time interval between the second time and the first time is greater than a first threshold; and / or, if the time interval between the second time and the first time is less than or equal to the first threshold, transmit the first uplink data based on the CG resources associated with the first beam in the first CG resources.

46. ​​The terminal device according to claim 42, characterized in that: The first processing module is used to perform one of the following operations before transmitting the first uplink data if a first condition is met: initiating a random access process; and transmitting the first uplink data based on a CG resource associated with the second beam in the first CG resource; wherein the first condition is associated with one or more of the following: beam measurement information of the first beam; and beam measurement information of the second beam, wherein the beam quality of the second beam is higher than the beam quality of the first beam.

47. The terminal device according to claim 46, characterized in that: The first condition includes one or more of the following: The beam quality of the first beam is less than or equal to a second threshold; A difference between the beam quality of the second beam and the beam quality of the first beam is greater than or equal to a third threshold; as well as The second beam is a beam with the best beam quality indicated by the beam measurement information.

48. The terminal device according to any one of claims 41 to 47, characterized in that: The terminal device further includes: A second processing module, configured to start a first timer after transmitting the first uplink data based on the first CG resource; During the operation of the first timer, the terminal device does not use other CG resources except the first CG resources to transmit the second uplink data in the first LTM candidate cell.

49. The terminal device according to claim 48, characterized in that: The terminal device further includes: A third processing module, configured to perform a second operation if the first timer times out and the terminal device does not receive confirmation information of the first uplink data; The second operation includes one of the following: Sending first indication information to a radio resource control (RRC) layer of the terminal device, where the first indication information is used to indicate that the LTM process has failed; and Initiate a random access procedure.

50. The terminal device according to claim 49, characterized in that: The terminal device further includes: The fourth processing module is used to control the RRC layer of the terminal device to stop the third timer and trigger the RRC connection reconstruction process after receiving the first indication information.

51. The terminal device according to any one of claims 41 to 50, characterized in that: The terminal device further includes: The fifth processing module is used to start a second timer after transmitting the first uplink data based on the first CG resource; if the second timer times out, retransmit the first uplink data.

52. The terminal device according to claim 51, characterized in that: The first uplink data is retransmitted based on a second CG resource, and the second CG resource is associated with the same hybrid repeat automatic request HARQ process and / or beam as the first CG resource.

53. The terminal device according to claim 51 or 52, characterized in that: The terminal device further includes: The sixth processing module is used to confirm that the LTM process has failed if the third timer maintained by the RRC layer of the terminal device times out and the terminal device has not received confirmation information of the first uplink data.

54. The terminal device according to any one of claims 41 to 50, characterized in that: The terminal device further includes: A communication module, configured to retransmit the first uplink data using a second CG resource after transmitting the first uplink data based on the first CG resource; The second CG resource is a CG resource in the target CG resource that is adjacent to the first CG resource, and the target CG resource is associated with the same HARQ process and / or beam as the first CG resource.

55. The terminal device according to any one of claims 41 to 54, characterized in that: The first processing module is used to initiate a CFRA process if the configuration information of the first LTM candidate cell configures non-contention random access CFRA resources; and / or initiate a contention-based random access CBRA process if the configuration information of the first LTM candidate cell does not configure CFRA resources.

56. The terminal device according to any one of claims 41 to 55, characterized in that: The first processing module is used to initiate a random access process using random access resources associated with the first beam; wherein, the first beam is a beam indicated by a first instruction or a beam selected by the terminal device based on layer one measurement, and the first instruction is used to instruct the terminal device to switch to the first LTM candidate cell.

57. The terminal device according to any one of claims 41 to 55, characterized in that: The terminal device further includes: The seventh processing module is used to re-execute the beam selection process before the terminal device initiates the random access process.

58. A terminal device, characterized in that: include: The first processing module is used to retain the first CG resources or release the first CG resources after the terminal device successfully accesses the first layer 1 / layer 2 triggered mobility LTM candidate cell based on the first configuration authorized CG resources.

59. The terminal device according to claim 58, characterized in that: The configuration information of the first CG resource includes one or more of the following information: The first indication information is used to indicate whether the terminal device releases the first CG resource after successfully accessing the first LTM candidate cell; as well as The second indication information is used to indicate whether the terminal device retains the first CG resource after successfully accessing the first LTM candidate cell.

60. The terminal device according to claim 58 or 59, characterized in that: The first processing module is used to control the media access control MAC layer of the terminal device to release the first CG resources; and / or control the radio resource control RRC layer of the terminal device to release the first CG resources.

61. The terminal device according to any one of claims 58 to 60, characterized in that: The first processing module is used to control the MAC layer of the terminal device to release the first CG resource after receiving the first confirmation information; and / or control the MAC layer of the terminal device to send second indication information to the RRC layer, and the second indication information is used to indicate that the MAC layer has released the first CG resource.

62. The terminal device according to any one of claims 58 to 60, characterized in that: The first processing module is used to control the MAC layer of the terminal device to send third indication information to the RRC layer after receiving the first confirmation information, where the third indication information is used to indicate that the LTM process is successfully completed; After receiving the third indication information, the RRC layer of the terminal device is controlled to send fourth indication information to the MAC layer, and the fourth indication information is used to instruct the MAC layer to release the first CG resource.

63. The terminal device according to claim 58, characterized in that: The first processing module is used to control the RRC layer of the terminal device to retain the first CG resources, and control the MAC layer of the terminal device to release the first CG resources; or, control both the RRC layer and the MAC layer of the terminal device to retain the first CG resources.

64. The terminal device according to claim 58 or 63, characterized in that: While retaining the first CG resources, the CG resources in the first CG resources that are associated with the working beam of the terminal device can be used for transmission of uplink data.

65. The terminal device according to claim 64, characterized in that: The CG resources in the first CG resources that are not associated with the working beam are released or suspended.

66. The terminal device according to claim 64 or 65, characterized in that: The working beam includes one of the following: A beam indicated by a first instruction, wherein the first instruction is used to instruct the terminal device to switch to the first LTM candidate cell; The terminal device selects a beam based on layer one measurement during the LTM process; and The beam is re-determined for the terminal device through the beam management process in the first LTM candidate cell.

67. The terminal device according to claim 58 or 63, characterized in that: In a case where the first CG resource is reserved, the first CG resource is used or not used for a target process; The target process includes one or more of the following: The beam management process triggered by the terminal device; Mobile originated small data transfer, MO-SDT; and Mobile Terminated Small Data Transfer MT-SDT.

68. The terminal device according to claim 67, characterized in that: Whether the first CG resource is used for the target process is determined based on the indication information of the network device.

69. The terminal device according to claim 58 or 63, characterized in that: The terminal device further includes: The communication module is configured to receive a second instruction sent by the network device, wherein the second instruction is configured to indicate one or more of the following: Whether to resume using the first CG resource; whether to activate the first CG resource; and Whether to release the association between the first CG resource and the beam.

70. The terminal device according to claim 69, characterized in that: The terminal device further includes: The second processing module is used to suspend the first CG resource before the terminal device receives the second instruction sent by the network device.

71. The terminal device according to claim 58 or 63, characterized in that: The terminal device further includes: The third processing module is used to release the association between the first CG resource and the beam after successfully accessing the first LTM candidate cell.

72. The terminal device according to claim 71, characterized in that: The operation of releasing the association relationship between the first CG resource and the beam is one of the following: The default operation of the terminal device after successfully accessing the first LTM candidate cell; The operation indicated by the third indication information included in the configuration information of the first CG resource; as well as The operations instructed by the network device after the terminal device successfully accesses the first LTM candidate cell.

73. A network device, characterized in that: include: A communication module, configured to send configuration information of a first layer 1 / layer 2 triggered mobility LTM candidate cell to a terminal device, wherein the configuration information of the first LTM candidate cell includes configuration information of a first configuration authorization CG resource, and the configuration information of the first CG resource includes one or more of the following information: The first indication information is used to indicate whether the terminal device releases the first CG resource after successfully accessing the first LTM candidate cell; The second indication information is used to indicate whether the terminal device retains the first CG resource after successfully accessing the first LTM candidate cell; as well as The third indication information is used to instruct the terminal device to release the first CG after successfully accessing the first LTM candidate cell. The relationship between resources and beams.

74. The network device according to claim 73, characterized in that The releasing the first CG resource comprises: The media access control MAC layer of the terminal device releases the first CG resource; and / or The radio resource control RRC layer of the terminal device releases the first CG resources.

75. The network device according to claim 73, characterized in that The retaining the first CG resource includes: The RRC layer of the terminal device retains the first CG resource, and the MAC layer of the terminal device releases the first CG resource; or, Both the RRC layer and the MAC layer of the terminal device retain the first CG resources.

76. The network device according to claim 73 or 75, characterized in that: While retaining the first CG resources, the CG resources in the first CG resources that are associated with the working beam of the terminal device are used for transmission of uplink data.

77. The network device according to claim 76, characterized in that The CG resources in the first CG resources that are not associated with the working beam are released or suspended.

78. The network device according to claim 76 or 77, characterized in that: The working beam includes one of the following: A beam indicated by a first instruction, wherein the first instruction is used to instruct the terminal device to switch to the first LTM candidate cell; The terminal device selects a beam based on layer one measurement during the LTM process; and The beam is re-determined for the terminal device through the beam management process in the first LTM candidate cell.

79. The network device according to claim 73 or 75, characterized in that: In a case where the first CG resource is reserved, the first CG resource is used or not used for a target process; The target process includes one or more of the following: The beam management process triggered by the terminal device; Mobile originated small data transfer, MO-SDT; and Mobile Terminated Small Data Transfer MT-SDT.

80. The network device according to claim 79, characterized in that Whether the first CG resource is used for the target process is determined based on the indication information of the network device.

81. A terminal device, characterized in that: It comprises a transceiver, a memory and a processor, wherein the memory is used to store programs, and the processor is used to call the programs in the memory and control the transceiver to receive or send signals so that the terminal device executes the method as described in any one of claims 1 to 17.

82. A terminal device, characterized in that: It comprises a transceiver, a memory and a processor, wherein the memory is used to store programs, and the processor is used to call the programs in the memory and control the transceiver to receive or send signals so that the terminal device executes the method as described in any one of claims 18-32.

83. A network device, characterized in that: It comprises a transceiver, a memory and a processor, wherein the memory is used to store programs, and the processor is used to call the programs in the memory and control the transceiver to receive or send signals so that the network device executes the method as described in any one of claims 33-40.

84. A device, characterized in that It comprises a processor, which is used to call a program from a memory so that the device executes the method as described in any one of claims 1-17, 18-32 or 33-40.

85. A chip, characterized in that: It comprises a processor, which is used to call a program from a memory, so that a device equipped with the chip executes the method as described in any one of claims 1-17, 18-32 or 33-40.

86. A computer-readable storage medium, characterized in that A program is stored thereon, the program causing the computer to execute the method according to any one of claims 1-17, 18-32 or 33-40.

87. A computer program product, characterized in that It comprises a program which causes a computer to execute the method as claimed in any one of claims 1-17, 18-32 or 33-40.

88. A computer program, characterized in that The computer program causes a computer to execute the method of any one of claims 1-17, 18-32 or 33-40.

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