Method executed by user equipment and user equipment

Abstract

The present invention provides a method executed by a user equipment and the user equipment. The method executed by the user equipment is a control method when data of DRB for Non SDT arrives during the SDT process of the UE, comprising the following steps: when the UE is in an inactive state, when the uplink data of a certain logical channel can be obtained by the MAC entity, and the DRB to which the logical channel belongs is not configured with SDT or the logical channel is not configured with SDT, the UE triggers the Non SDT BSR; when there is a triggered Non SDT BSR and the UE has uplink resources, the UE indicates to generate a Non SDT BSR MAC CE and starts a timer retx non SDT BSR‑Timer, wherein, when the Non SDT BSR MAC CE is included in the sent MAC PDU, the UE cancels the triggered Non SDT BSR.

Description

Technical Field

[0001] The present invention relates to the technical field of wireless communications, and more particularly, to a method executed by a user equipment and a corresponding user equipment. Background Art

[0002] In order to shorten the transmission delay and save signaling overhead, the UE entering the RRC INACTIVE STATE can send a transport block of a predetermined size carrying data on a preconfigured uplink resource (PUR). This transmission mode can be called PUR transmission. It is also possible to send a transport block carrying user data in message 3 or message A during random access. Both transmission modes can be called small data transmission (SDT).

[0003] The data radio bearer (DRB) that can be transmitted using the small data transmission method is called DRB for SDT. The data radio bearer that is not allowed to be transmitted using the small data transmission method is called DRB forNon-SDT. New data may arrive when the UE is performing small data transmission. Such data may need to be transmitted via DRB fornon-SDT or DRB for SDT.

[0004] In the prior art, when the uplink data of a certain logical channel can be obtained by the MAC entity, the UE can trigger a buffer status report (BSR). When the DRB corresponding to this logical channel is configured with SDT or not configured with SDT, how the UE needs to trigger the generation of the BSR is a problem that needs to be solved. Summary of the invention

[0005] In order to solve the above problems in the prior art, the present invention provides a method performed by a user equipment and the user equipment.

[0006] According to one aspect of the present invention, a method performed by a user equipment is provided, which is a control method when data of a data radio bearer DRB for Non SDT not based on small data transmission arrives during a small data transmission SDT of the user equipment UE, comprising the following steps:

[0007] The UE is in an inactive state. When the uplink data of a logical channel can be obtained by the MAC entity, and the DRB to which the logical channel belongs is not configured with SDT or the logical channel is not configured with SDT, the UE triggers a non-small data transmission buffer status report Non SDT BSR;

[0008] When there is a triggered Non SDT BSR and the UE has uplink resources, the UE indicates the generation of a Non SDT BSR MAC CE and starts a timer retx non SDT BSR-Timer, wherein when the Non SDT BSR MAC CE is included in the transmitted MAC PDU, the UE cancels the triggered Non SDT BSR.

[0009] In the above method performed by the user equipment, preferably,

[0010] The Non SDT BSR MAC CE includes one or more of the following:

[0011] MAC subheader, which carries a specific logical channel identifier LCID and is used to indicate the arrival of Non SDT data;

[0012] A logical channel identifier, where the logical channel is the logical channel to which the arriving uplink data belongs;

[0013] a logical channel group identifier, where the logical channel group is the logical channel group to which the logical channel to which the arriving uplink data belongs;

[0014] The buffer size is the amount of uplink data that can be obtained in a logical channel, or the amount of all uplink data that can be obtained in the logical channel group to which the logical channel belongs.

[0015] In the above method performed by the user equipment, preferably,

[0016] When the timer retx non SDT BSR-Timer times out, if there is a logical channel containing uplink data and the logical channel is not configured with SDT, the UE triggers Non SDTBSR.

[0017] In the above method performed by the user equipment, preferably, the method further includes the following steps:

[0018] When the UE is performing small data transmission, the BSR is triggered based on the arrival of DRB for SDT data.

[0019] When the UE has a triggered BSR and there are available uplink resources, the UE instructs the generation of a BSR MAC CE and starts or restarts the timer retxBSR-Timer, wherein when the BSR MAC CE is included in the transmitted MAC PDU, the UE cancels the triggered BSR.

[0020] In the above method performed by the user equipment, preferably,

[0021] When the uplink data of a logical channel can be obtained by the MAC entity, and when the UE is in an inactive state, if the logical channel to which the data belongs is configured with SDT, and the priority of the logical channel is higher than the priority of other existing logical channels that can obtain uplink data, then the UE triggers a BSR;

[0022] When the uplink data on a logical channel can be obtained by the MAC entity and when the UE is in an inactive state, if the logical channel to which the data belongs is configured with SDT and no other logical channel contains uplink data that can be obtained, the UE triggers a BSR.

[0023] In the above method performed by the user equipment, preferably,

[0024] When the timer retxBSR-Timer runs out of time,

[0025] When the UE is in an inactive state, if a logical channel contains uplink data and the logical channel to which the data belongs is configured with SDT, the UE triggers a BSR.

[0026] In the above method performed by the user equipment, preferably,

[0027] When the UE enters the connected state, if there is a timer retx non SDT BSR-Timer running, the UE stops the timer retx non SDT BSR-Timer.

[0028] In the above method performed by the user equipment, preferably,

[0029] When the UE enters the connected state, the UE resets the MAC layer, and the operation of resetting the MAC layer at least includes an operation of the UE stopping the running timer retx non SDT BSR-Timer.

[0030] In the above method performed by the user equipment, preferably,

[0031] If, when the UE generates a MAC PDU, there are both Non SDT BSR MAC CE and regular BSR MAC CE that need to be multiplexed in one MAC PDU, the priority of Non SDT BSR MAC CE is set to be higher than the priority of regular BSR MAC CE.

[0032] According to another aspect of the present invention, there is provided a user equipment, comprising:

[0033] Processor; and

[0034] A memory, wherein instructions are stored in the memory,

[0035] When the instructions are executed by the processor, the user equipment is enabled to execute the method described above.

[0036] According to the method performed by the user equipment and the corresponding user equipment involved in the present invention, the transmission delay can be shortened and the signaling overhead can be saved. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The above and other features of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which:

[0038] Figure 1 It is a flowchart showing a method executed by a user equipment according to an embodiment of the present invention.

[0039] Figure 2 The figure is a simplified structural block diagram of a user equipment according to the present invention. DETAILED DESCRIPTION

[0040] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the present invention should not be limited to the specific embodiments described below. In addition, for the sake of simplicity, detailed descriptions of known technologies that are not directly related to the present invention are omitted to prevent confusion in understanding the present invention.

[0041] Before the detailed description, some terms mentioned in the present invention are explained as follows. Unless otherwise specified, the terms involved in the present invention have the following meanings.

[0042] UE User Equipment

[0043] NR New Radio Next Generation Wireless Technology

[0044] LTE Long Term Evolution

[0045] eLTE Enhaced Long Term Evolution

[0046] RRC Radio Resource Control Radio Resource Control (layer)

[0047] MAC Medium Access Control Media Access Control (layer)

[0048] MAC CE MAC Control Element MAC Control Element

[0049] MAC PDU MAC Protocol Data Unit MAC Protocol Data Unit

[0050] PUSCH Physical Uplink Shared Channel Physical Uplink Shared Channel

[0051] PDCCH Physical Downlink Control Channel

[0052] SDAP Service Data Adaptation Protocol Service Data Adaptation Layer Protocol

[0053] PDCP Packet Data Convergence Protocol Packet Data Convergence Protocol

[0054] RLC Radio Link Control, wireless link layer control protocol

[0055] BSR Buffer Status Report

[0056] DRB Data Radio Bearer

[0057] SDT Small Data Transmission

[0058] UL-SCH Uplink Shared Channel Uplink Shared Channel

[0059] The following takes the NR mobile communication system and its subsequent evolutionary versions as an example application environment, and takes the base station and UE device supporting NR as an example to specifically describe multiple embodiments of the present invention. However, it should be pointed out that the present invention is not limited to the following embodiments, but is applicable to more other wireless communication systems, such as eLTE, communication system, or NB-Iot system, or LTE-M system. And it can be applicable to other base stations and UE devices, such as base stations and UE devices supporting eLTE / NB-Iot / LTE-M.

[0060] A UE that enters the RRC inactive state (RRC INACTIVE STATE) can send a transport block (Transport Block) of a predetermined size that carries data on a preconfigured uplink resource (PUR). This transmission mode can be called PUR transmission. During the random access process, a transport block carrying user data can also be sent in message three or message A. Both of these transmission modes can be called small data transmission (SDT). Since such transmission is always performed in an inactive state, such a transmission mode can also be called data transmission of the UE in an inactive state.

[0061] A data radio bearer (DRB) that can be transmitted in a small data transmission mode is called a DRB for SDT (data radio bearer based on small data transmission). Such a DRB can also be called a DRB configured with SDT.

[0062] A data radio bearer that is not allowed to be transmitted in a small data transmission mode is called a DRB for Non-SDT (a data radio bearer not based on small data transmission). Such a DRB can also be called a DRB that is not configured with SDT.

[0063] Each DRB corresponds to at least one logical channel, and each logical channel has its own identifier, also called a logical channel identity (LCID).

[0064] Correspondingly, the logical channel of a DRB configured with SDT can also be understood as a logical channel configured with SDT, or a logical channel supporting SDT (LC for SDT); the logical channel of a DRB not configured with SDT can also be understood as a logical channel not configured with SDT, or a logical channel not supporting SDT (LC for non-SDT).

[0065] Data Arrival

[0066] Data arrival means that the MAC entity can or is able to obtain uplink data. Inside the UE, the MAC entity is responsible for assembling uplink data into a MAC PDU. The data that arrives here refers to the data that the MAC entity can obtain and use for assembly. The MAC entity obtains uplink data from one or more logical channels. Therefore, this situation can be understood as data arrival for a certain logical channel, or the logical channel contains uplink data. Each logical channel is associated with a PDCP entity and an RLC entity, or a logical channel is associated with a DRB, and this DRB contains the corresponding PDCP entity and RLC entity. How much data has arrived needs to be calculated. Usually, the total amount of data that can be obtained is calculated by considering the amount of data in the PDCP layer and the RLC layer. When counting, it is usually based on logical channels or logical channel groups. Counting the amount of data that can be obtained by a logical channel means counting the amount of data in the PDCP layer and the RLC layer related to the logical channel; when counting the amount of data that can be obtained by a logical channel group, it means counting the sum of the amount of data that can be obtained by all logical channels belonging to the logical channel group.

[0067] When the UE is performing small data transmission, only uplink data on the DRB for SDT can be sent. However, during the transmission process, data that needs to be transmitted via the DRB for SDT may arrive, and data that needs to be transmitted via the DRB for non-SDT may also arrive.

[0068] When DRB for Non SDT data arrives,

[0069] -When the priority of the logical channel to which the data belongs (assuming LC-1) is higher than the priority of the logical channel to which the data in the DRB for SDT belongs (assuming LC-2), the UE can trigger a BSR. However, in the existing BSR design, the UE reports in units of logical channel groups (LCG). If LC-1 and LC-2 belong to the same logical channel group, then according to the BSR, the base station cannot distinguish whether the reported data belongs to LC-1 or LC-2. That is, it cannot identify the arrival of data with DRB for non SDT.

[0070] - When the priority of LC-1 is lower than that of LC-2, the UE will not trigger a BSR.

[0071] It can be seen that in the above situation, the UE cannot report the arrival of DRB for Non SDT data to the base station, which causes a delay in data transmission.

[0072] In addition, when the UE is performing small data transmission and DRB for Non SDT data arrives, the UE can re-trigger an RRC resume process. In this case, if the UE continues to report the arrival of DRB for Non SDT data to the base station through BSR, it will become redundant.

[0073] In order to solve the problems mentioned in the background technology, several embodiments of the present invention are described in detail below.

[0074] Embodiment 1

[0075] This embodiment provides a control method when DRB for Non SDT data arrives during small data transmission SDT of UE.

[0076] In order to avoid data transmission delay of DRB for Non SDT (data radio bearer not based on small data transmission), when the UE is performing small data transmission, if DRB for Non SDT data arrives, a Non SDT BSR (non-small data transmission buffer status report) can be triggered.

[0077] Specific implementation methods may be, for example Figure 1 As shown, including:

[0078] Step S101: The UE is in an inactive state. When the uplink data of a logical channel can be or can be obtained by the MAC entity (UL data becomes available to the MAC entity), and the DRB to which the logical channel belongs is not configured with SDT, or the logical channel is not configured with SDT, the UE triggers the Non SDT BSR.

[0079] Step S102: When there is a triggered Non SDT BSR and the UE has uplink resources (UL-SCH resources are available), the UE indicates to generate a Non SDT BSR MAC CE and starts the timer retxnon SDTBSR-Timer. When the Non SDT BSR MAC CE is included in the transmitted MAC PDU, the UE cancels the triggered Non SDT BSR.

[0080] The Non SDT BSR MAC CE here may include one or more of the following:

[0081] -Contains a MAC subheader, which carries a specific logical channel identifier LCID, used to indicate the arrival of Non SDT data, or to identify that the MACCE is a Non SDT BSR MAC CE;

[0082] - includes a logical channel identifier, where the logical channel refers to the logical channel to which the arriving uplink data belongs. Preferably, the logical channel is a logical channel that is not configured with SDT;

[0083] - includes a logical channel group identifier, where the logical channel group refers to the logical channel group to which the logical channel to which the arriving uplink data belongs belongs, preferably, the logical channel is a logical channel not configured with SDT, and preferably, the logical channels belonging to the logical channel group are all logical channels not configured with SDT, or the logical channel group does not include a logical channel configured with SDT;

[0084] - includes a buffer size, where buffer refers to the amount of uplink data that arrives and can be obtained in a logical channel, or the amount of all available uplink data in the logical channel group to which the logical channel belongs. Preferably, each buffer size corresponds to or is associated with a logical channel or a logical channel group.

[0085] Preferably, when the timer retx non SDT BSR-Timer times out, if at least one logical channel contains uplink data and the logical channel is not configured with SDT, the UE will trigger the non SDTBSR. The "contains uplink data" here may refer to the arrival of uplink data as mentioned above. Due to the existence of the triggered nonSDT BSR, the UE can perform the operation in step S102. When the timer retx non SDT BSR-Timer times out, if no logical channel containing uplink data is configured with SDT, the UE will not trigger the non SDT BSR.

[0086] Embodiment 2

[0087] In order to avoid redundant reporting of DRB for Non SDT data, when the UE is transmitting small data (that is, when the UE is in a non-connected state), the BSR is triggered according to the arrival of DRB for SDT data, that is, the arrival of DRB for non SDT data will not trigger the BSR.

[0088] A specific implementation method may be

[0089] -When the uplink data of a logical channel can be obtained by the MAC entity (UL data becomes available to the MAC entity), and when the UE is in an inactive state, if the logical channel to which the data belongs is configured with SDT and the priority of the logical channel is higher than the priority of other logical channels with available uplink data, then the UE can trigger a BSR.

[0090] -When uplink data on a logical channel can be obtained by the MAC entity, and when the UE is in an inactive state, if the logical channel to which the data belongs is configured with SDT, and no other logical channel contains obtainable uplink data at this time, then the UE can trigger a BSR. Preferably, the "other" logical channel here refers to the logical channel configured with SDT.

[0091] Preferably, when the UE has a triggered BSR and there are available uplink resources, the UE may instruct to generate the BSRMAC CE (instruct to generate the BSR), and start or restart the timer retxBSR-Timer.

[0092] Preferably, when the UE has available uplink resources, the timer retxBSR-Timer may be restarted.

[0093] Preferably, once the BSR MAC CE is included in the transmitted MAC PDU, the triggered BSR is canceled.

[0094] Preferably, when the timer retxBSR-Timer expires and the UE is in an inactive state, if there is a logical channel containing uplink data and the logical channel to which the data belongs is configured with SDT, the UE triggers a BSR.

[0095] Optionally, as a supplement to the above solution in the process of UE performing small data transmission, that is, in the process of data transmission using non-small data transmission, the UE may trigger a BSR in the following circumstances:

[0096] -When the uplink data of a logical channel is available or can be obtained by the MAC entity (UL data becomes available to the MAC entity), and when the UE is in a connected state, if the priority of the logical channel to which this data belongs is higher than the priority of other existing logical channels for available uplink data, then the UE can trigger a BSR

[0097] -When uplink data on a logical channel can be obtained by the MAC entity and when the UE is in a connected state, if there is no other logical channel containing obtainable uplink data at this time, the UE can trigger a BSR.

[0098] as well as

[0099] When the timer retxBSR-Timer runs out of time,

[0100] -When the UE is in connected state, if there is a logical channel containing uplink data, the UE will trigger a BSR.

[0101] Embodiment 2 may be used as a supplement to Embodiment 1, or implemented independently. The triggered BSR here may be referred to as a regular BSR, and the BSR MAC CE generated based on the triggered BSR may be referred to as a regular BSR MAC CE, to distinguish it from the Non SDT BSR MAC CE in Embodiment 1.

[0102] Embodiment 3

[0103] On the basis of the above-mentioned embodiment, when the UE enters the connected state, if there is a running retx non SDT BSR-Timer, the UE stops the retx non SDT BSR-Timer.

[0104] Here, the UE's judgment on entering the connected state may be based on the state of the upper layer, such as the state of the RRC layer, or the RRC layer instructs the MAC layer UE to enter the connected state.

[0105] Another implementation of the above scheme can be

[0106] When the UE enters the connected state, the UE resets the MAC layer, and the operation of resetting the MAC layer at least includes the UE stopping the running retx non SDT BSR-Timer.

[0107] The UE can reset the MAC layer after receiving an RRC resume message (RRC resume message). Preferably, the received RRC resume message is a response message to an RRC resume request message (RRC resume request message) sent by the UE for small data transmission (SDT), or equivalently, is a response message to an RRC resume request message sent by the UE and triggered by SDT.

[0108] Embodiment 4

[0109] On the basis of the foregoing embodiment, if, when the UE generates a MAC PDU, there are both Non SDT BSR MAC CE and regular BSR MAC CE that need to be multiplexed and assembled in one MAC PDU, then the priority of Non SDT BSR MAC CE is higher than that of regular BSR MAC CE. The "priority" here means that when resources are certain, priority is given to putting Non SDT BSR MAC CE into the MAC PDU, and if resources are still remaining, regular BSR MAC CE is considered. Such "priority" refers to priority multiplexing (multiplex) or priority assembling (assemble) in the multiplexing and assembling operation.

[0110] Embodiment 5

[0111] On the basis of the above-mentioned embodiment, when the UE enters the connected state, if there is a triggered BSR, whether it is the Non SDT BSR mentioned in the first embodiment or the regular BSR mentioned in the second embodiment, the UE cancels the triggered BSR.

[0112] Here, the UE's judgment on entering the connected state may be based on the state of an upper layer, such as the state of the RRC layer, or the RRC layer instructs the MAC layer that the UE enters the connected state.

[0113] Another implementation of the above scheme can be

[0114] When the UE enters the connected state, the UE resets the MAC layer, and the operation of resetting the MAC layer at least includes canceling the triggered BSR (Non SDT BSR or regular BSR).

[0115] The UE can reset the MAC layer after receiving an RRC resume message (RRC resume message). Preferably, the received RRC resume message is a response message to an RRC resume request message (RRCresume requestmessage) sent by the UE for small data transmission (SDT), or equivalently, is a response message to an RRCresumerequest message sent by the UE and triggered by SDT.

[0116] Figure 2 1 is a simplified structural block diagram of the user equipment involved in the present invention. Figure 2As shown, the user equipment UE200 includes a processor 201 and a memory 202. The processor 201 may include, for example, a microprocessor, a microcontroller, an embedded processor, etc. The memory 202 may include, for example, a volatile memory (such as a random access memory RAM), a hard disk drive (HDD), a non-volatile memory (such as a flash memory), or other memories, etc. The memory 202 stores program instructions. When the instructions are executed by the processor 201, the above method performed by the user equipment described in detail in the present invention may be executed.

[0117] The program running on the device according to the present invention can be a program that enables a computer to implement the functions of the embodiments of the present invention by controlling a central processing unit (CPU). The program or the information processed by the program can be temporarily stored in a volatile memory (such as a random access memory RAM), a hard disk drive (HDD), a non-volatile memory (such as a flash memory), or other memory systems.

[0118] The program for realizing the functions of various embodiments of the present invention can be recorded on a computer-readable recording medium. The corresponding functions can be realized by making a computer system read the program recorded on the recording medium and executing these programs. The so-called "computer system" herein can be a computer system embedded in the device, and can include an operating system or hardware (such as a peripheral device). "Computer-readable recording medium" can be a semiconductor recording medium, an optical recording medium, a magnetic recording medium, a recording medium of a short-term dynamic storage program, or any other recording medium that is computer-readable.

[0119] The various features or functional modules of the devices used in the above embodiments can be implemented or executed by circuits (e.g., single-chip or multi-chip integrated circuits). Circuits designed to perform the functions described in this specification may include general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic, discrete hardware components, or any combination of the above devices. The general-purpose processor may be a microprocessor, or any existing processor, controller, microcontroller, or state machine. The above circuits may be digital circuits or analog circuits. In the case where new integrated circuit technologies have emerged to replace existing integrated circuits due to advances in semiconductor technology, one or more embodiments of the present invention may also be implemented using these new integrated circuit technologies.

[0120] In addition, the present invention is not limited to the above-mentioned embodiments. Although various examples of the embodiments have been described, the present invention is not limited thereto. Fixed or non-mobile electronic devices installed indoors or outdoors can be used as terminal devices or communication devices, such as AV equipment, kitchen equipment, cleaning equipment, air conditioners, office equipment, vending machines, and other household appliances.

[0121] As mentioned above, the embodiments of the present invention have been described in detail with reference to the accompanying drawings. However, the specific structure is not limited to the above embodiments, and the present invention also includes any design changes that do not deviate from the main purpose of the present invention. In addition, the present invention can be modified in various ways within the scope of the claims, and the embodiments obtained by appropriately combining the technical means disclosed in different embodiments are also included in the technical scope of the present invention. In addition, the components with the same effect described in the above embodiments can be replaced with each other.

Claims

1. A method performed by a user equipment is a control method when data of a data radio bearer DRB for Non SDT not based on small data transmission arrives during a small data transmission SDT of the user equipment UE, comprising the following steps: The UE is in an inactive state. When the uplink data of a logical channel can be obtained by the media access control MAC entity, and the data radio bearer DRB to which the logical channel belongs is not configured with SDT or the logical channel is not configured with SDT, the UE triggers a non-small data transmission buffer status report Non SDT BSR. When there is a triggered Non SDT BSR and the UE has uplink resources, the UE indicates the generation of the Non SDT BSR MAC control element, i.e., the Non SDT BSR MAC CE, and starts the timer retx non SDT BSR-Timer. in, When the NonSDT BSR MAC CE is included in the transmitted MAC protocol data unit, i.e., MAC PDU, the UE cancels the triggered Non SDTBSR; When the UE is performing small data transmission, when data based on the data radio bearer DRB for SDT for small data transmission arrives, the buffer status report BSR is triggered. When the UE has a triggered BSR and there are available uplink resources, the UE instructs the generation of a regular BSR MAC CE and starts or restarts the timer retxBSR-Timer, wherein when the regular BSR MAC CE is included in the transmitted MAC PDU, the UE cancels the triggered BSR; If, when the UE generates a MAC PDU, there are both Non SDT BSR MAC CE and regular BSR MAC CE that need to be multiplexed in one MAC PDU, the priority of the Non SDT BSR MAC CE is set to be higher than the priority of the regular BSR MAC CE.

2. The method according to claim 1, in, The Non SDT BSR MAC CE includes one or more of the following: MAC subheader, which carries a specific logical channel identifier LCID, used to indicate the arrival of non-small data transmission Non SDT data; A logical channel identifier, where the logical channel is the logical channel to which the arriving uplink data belongs; a logical channel group identifier, where the logical channel group is the logical channel group to which the logical channel to which the arriving uplink data belongs; The buffer size is the amount of uplink data that can be obtained in a logical channel, or the amount of all uplink data that can be obtained in the logical channel group to which the logical channel belongs.

3. The method according to claim 1, in, When the timer retx non SDT BSR-Timer times out, if there is a logical channel containing uplink data and the logical channel is not configured with SDT, the UE triggers the Non SDT BSR.

4. The method according to claim 1, in, When the uplink data of a logical channel can be obtained by the MAC entity, and when the UE is in an inactive state, if the logical channel to which the data belongs is configured with SDT, and the priority of the logical channel is higher than the priority of other existing logical channels that can obtain uplink data, then the UE triggers a BSR; When the uplink data on a logical channel can be obtained by the MAC entity and when the UE is in an inactive state, if the logical channel to which the data belongs is configured with SDT and no other logical channel contains uplink data that can be obtained, the UE triggers a BSR.

5. The method according to claim 1, in, When the timer retxBSR-Timer runs out of time, When the UE is in an inactive state, if a logical channel contains uplink data and the logical channel to which the data belongs is configured with SDT, the UE triggers a BSR.

6. The method performed by a user equipment according to any one of claims 1 to 5, in, When the UE enters the connected state, if there is a timer retx non SDT BSR-Timer running, the UE stops the timer retx non SDT BSR-Timer.

7. The method performed by a user equipment according to any one of claims 1 to 5, in, When the UE enters the connected state, the UE resets the MAC layer, and the operation of resetting the MAC layer at least includes an operation of the UE stopping the running timer retx non SDT BSR-Timer.

8. A user device, include: processor; as well as A memory, wherein instructions are stored in the memory, When the instructions are executed by the processor, the user equipment executes the method according to any one of claims 1 to 7.

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