CN118104354A

CN118104354A - Method, device, equipment and storage medium for determining effectiveness of timing advance

Info

Publication number: CN118104354A
Application number: CN202180103233.2A
Authority: CN
Inventors: 林雪; 尤心; 李海涛
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2021-12-14
Filing date: 2021-12-14
Publication date: 2024-05-28
Also published as: WO2023108420A1

Abstract

The application discloses a method, a device, equipment and a storage medium for determining the effectiveness of timing advance, and relates to the field of wireless communication. The method is applied to the terminal equipment and comprises the following steps: after CG-SDT is initiated, a first timer is started, and the validity of the TA in the subsequent transmission stage is maintained through the first timer; or, after the CG-SDT is initiated, maintaining the validity of the TA for the subsequent transmission phase based on a first RSRP delta.

Description

Method, device, equipment and storage medium for determining effectiveness of timing advance

Technical Field

The present application relates to the field of wireless communications, and in particular, to a method, apparatus, device, and storage medium for determining validity of timing advance.

Background

In the rrc_inactive state (i.e., INACTIVE state), the terminal device supports data Transmission through small data Transmission (SMALL DATA Transmission, SDT). And, in the course of SDT, support for subsequent (sub-sequence) transmissions.

In a subsequent transmission stage of uplink small data transmission (i.e., CG-SDT) based on a preconfigured resource (e.g., CG type 1), the terminal device may use the CG resource or DG resource to continue to perform data transmission, at this time, how the terminal device determines whether the timing advance (TIMING ADVANCE, TA) is valid or not, and the related art has not yet provided a better solution.

Disclosure of Invention

The embodiment of the application provides a method, a device, equipment and a storage medium for determining the effectiveness of timing advance. The technical scheme is as follows:

According to one aspect of the present application, there is provided a method of determining the validity of a timing advance, the method comprising:

after CG-SDT is initiated, a first timer is started, and the validity of the TA in the subsequent transmission stage is maintained through the first timer;

Or alternatively, the first and second heat exchangers may be,

After the CG-SDT is initiated, maintaining validity of the TA for the subsequent transmission phase based on a first reference signal received Power (REFERENCE SIGNAL RECEIVING Power, RSRP) change.

Sending a first feedback message to terminal equipment;

The first feedback message is used for determining to start a first timer after the terminal equipment initiates the CG-SDT, and the first timer is used for maintaining the validity of the TA in the subsequent transmission stage.

According to an aspect of the present application, there is provided an apparatus for determining the validity of a timing advance, the apparatus comprising: a validity maintenance module;

The validity determining module is used for starting a first timer after the CG-SDT is initiated, and maintaining the validity of the TA in the subsequent transmission stage through the first timer;

Or alternatively, the first and second heat exchangers may be,

The validity maintenance module is configured to maintain validity of the TA in the subsequent transmission stage based on a first RSRP variable after the CG-SDT is initiated.

According to an aspect of the present application, there is provided an apparatus for determining the validity of a timing advance, the apparatus comprising: a message sending module;

the message sending module is used for sending a first feedback message to the terminal equipment;

According to an aspect of the present application, there is provided a terminal device including: a processor; wherein,

The processor is used for starting a first timer after the CG-SDT is initiated, and maintaining the validity of the TA in the subsequent transmission stage through the first timer;

Or alternatively, the first and second heat exchangers may be,

The processor is configured to maintain validity of the TA for the subsequent transmission phase based on a first RSRP delta after the CG-SDT is initiated.

According to an aspect of the present application, there is provided a network device comprising: a transceiver; wherein,

The transceiver is used for sending a first feedback message to the terminal equipment;

According to one aspect of the present application, there is provided a computer readable storage medium having stored therein executable instructions that are loaded and executed by a processor to implement a method of determining the validity of a timing advance as described in the above aspects.

According to an aspect of an embodiment of the present application, there is provided a chip comprising programmable logic and/or program instructions for implementing the method of determining the validity of a timing advance described in the above aspect when the chip is run on a computer device.

According to one aspect of the present application there is provided a computer program product which, when run on a processor of a computer device, causes the computer device to perform the method of determining the validity of a timing advance as described in the above aspects.

The technical scheme provided by the embodiment of the application at least comprises the following beneficial effects:

For the subsequent transmission stage of the CG-SDT, the terminal device may maintain the validity of the TA by using a timer, or may maintain the validity of the TA by using an RSRP variable, thereby providing an implementation manner for determining the validity of the TA, so that the terminal device may perform uplink transmission based on the valid TA.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a flowchart of uplink advanced data transmission according to an exemplary embodiment of the present application;

FIG. 2 is a flow chart of a preconfigured uplink resource transmission provided by an exemplary embodiment of the present application;

FIG. 3 is a block diagram of a communication system provided by an exemplary embodiment of the present application;

FIG. 4 is a flow chart of a method of determining the effectiveness of a timing advance provided by an exemplary embodiment of the present application;

FIG. 5 is a flow chart of a method of determining the effectiveness of a timing advance provided by an exemplary embodiment of the present application;

FIG. 6 is a flow chart of a method of determining the effectiveness of a timing advance provided by an exemplary embodiment of the present application;

FIG. 7 is a flowchart of a method for determining the validity of a timing advance provided by an exemplary embodiment of the present application;

FIG. 8 is a schematic diagram of a method for determining the effectiveness of a timing advance provided by an exemplary embodiment of the present application;

FIG. 9 is a block diagram of a timing advance validity determination apparatus provided in an exemplary embodiment of the present application;

FIG. 10 is a block diagram of a timing advance validity determination apparatus provided in an exemplary embodiment of the present application;

fig. 11 is a schematic structural diagram of a communication device according to an exemplary embodiment of the present application.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present application more apparent, the embodiments of the present application will be described in further detail with reference to the accompanying drawings.

First, the terms involved in the embodiments of the present application will be briefly described:

advanced data transfer (EARLY DATA Transmission, EDT):

In long term evolution (Long Term Evolution, LTE), EDT procedures are introduced, which can be understood as a small data transmission procedure. In this process, the terminal device may always remain in an IDLE state (rrc_idle) or a suspended state (rrc_suspend) or an INACTIVE state (rrc_inactive), and complete transmission of the uplink and/or downlink small data packets. In configuration, the network configures a maximum transmission block threshold (TB size) allowed to be transmitted by the current network on the system information block 2 (System Information Block, sib2), the terminal device judges the data volume to be transmitted, and if the data volume is smaller than the maximum TB size, the terminal device can initiate EDT transmission; otherwise, the terminal equipment enters a connection state to transmit data by using a normal connection establishment process.

If the cell in which the terminal device initiates the uplink EDT is the same as the last serving cell, after receiving the radio resource control (Radio Resource Control, RRC) connection recovery request and the uplink data sent by the terminal device, the base station may directly forward the uplink data to the core network, where a specific UP-EDT flow is shown in fig. 1.

Pre-configured uplink resources (Preconfigured Uplink Resource, PUR):

In LTE, methods for data transmission using PUR in rrc_idle state are introduced for narrowband internet of things (Narrow Band Internet of Things, NB-IoT) and enhanced machine Communication (eMTC) scenarios. The PUR is only valid in the currently configured cell, i.e. when the terminal device detects a cell change and initiates a random access in the new cell, the terminal device needs to release the PUR configured in the original cell. The PUR transmission flow is similar to LTE UP-EDT, except that the process of sending a random access preamble to obtain TA and uplink grant (UL grant) is omitted, and the air interface flow of specific PUR transmission is shown in fig. 2.

Small data transfer (SMALL DATA Transmission, SDT):

In the 5G NR system, RRC states are divided into 3 types, respectively: rrc_idle (IDLE state), rrc_inactive (INACTIVE state), rrc_connected (CONNECTED state).

Wherein the rrc_inactive state is a new state introduced by the 5G system from the energy saving point of view, for the terminal device in the rrc_inactive state, radio bearers and all radio resources are released, but the terminal device side and the base station side reserve the UE access context in order to quickly restore the RRC connection, and the network typically keeps the terminal device in the rrc_inactive state where data transmission is not frequent.

Before R16, the terminal device in rrc_inactive state does not support data transmission, and when uplink or downlink data arrives, the terminal device needs to restore connection, and releases the connection to an INACTIVE state after the data transmission is completed. For terminal devices with small data volumes and low transmission frequencies, such transmission mechanisms may result in unnecessary power consumption and signaling overhead. Thus, R17 stands for research on small data transmission under rrc_inactive, and project targets mainly have two directions: random access (two-step/four-step) based small data transmission (i.e., RA-SDT) and small data transmission (i.e., CG-SDT) based on pre-configured resources (e.g., CG type 1).

For CG-SDT, the terminal device may directly transmit data using the network pre-configured uplink resources. Since the random access procedure is omitted, the terminal device needs to ensure that there is a valid timing TA when initiating CG-SDT. According to the discussion of 3GPP RAN2 operation, the method for the terminal device to determine whether the TA is valid includes:

-introducing a timer, during which timer the TA is considered valid; and (3) injection: the timer is a new timer introduced for CG-SDT (the timer is described later as SDT-TAT), unlike the timing advance timer (TIMING ADVANCE TIMER, TAT) maintained by the connected terminal device.

-Introducing an RSRP change threshold, and considering the TA as valid if the RSRP change of the terminal device does not exceed the threshold.

CG-SDT resources are UE dedicated resources configured through UE dedicated signaling; the RA-SDT resource is a cell-specific resource, and is contained in a system broadcast message, and terminal equipment in the current cell shares the RA-SDT resource. When selecting the SDT type, the terminal device preferentially judges whether the condition of executing CG-SDT is satisfied, including:

-the data to be transmitted all belong to Radio Bearers (RBs) that allow for triggering SDT, and the amount of data to be transmitted is not greater than a network configured data amount threshold.

-The downlink RSRP measurement is not less than the network configured RSRP threshold for performing SDT.

-CG resources are present on the selected carrier and synchronization signal block (Synchronization Signal Block, SSB).

TA active.

The SDT procedure supports subsequent (sub-sequence) transmissions, which for CG-SDT may be based on either Configured Grant (CG) or dynamic scheduling of the network (DYNAMIC GRANT, DG). In the subsequent transmission phase, the terminal device can continue to transmit and perform data transmission by using CG/DG, so that it is necessary to determine what manner the terminal device adopts to determine whether the TA is valid.

In view of the above problems, in the embodiment of the present application, for the subsequent transmission stage of CG-SDT, the terminal device may maintain the validity of TA through a timer, and may also maintain the validity of TA through RSRP variation, thereby providing an implementation manner for determining the validity of TA.

Fig. 3 shows a block diagram of a communication system provided by an exemplary embodiment of the present application, which may include: access network 12 and terminal equipment 14.

Access network 12 includes a number of network devices 120 therein. The network device 120 may be a base station, which is a means deployed in an access network to provide wireless communication functionality for terminal devices. The base stations may include various forms of macro base stations, micro base stations, relay stations, access points, and the like. In systems employing different radio access technologies, the names of base station capable devices may vary, for example in LTE systems, called enodebs or enbs; in the 5G NR-U system, it is called gNodeB or gNB. As communication technology evolves, the description of "base station" may change. For convenience, the above-described devices for providing the terminal device 14 with the wireless communication function are collectively referred to as network devices.

The terminal device 14 may include various handheld devices, vehicle mounted devices, wearable devices, computing devices, or other processing devices connected to a wireless modem, as well as various forms of user equipment, mobile Stations (MSs), terminal devices (TERMINAL DEVICE), and the like. For convenience of description, the above-mentioned devices are collectively referred to as terminal devices. The network device 120 and the terminal device 14 communicate with each other via some air interface technology, e.g. Uu interface. Optionally, the terminal device 14 supports performing a small data transfer procedure in the inactive state.

The technical scheme of the embodiment of the application can be applied to various communication systems, such as: global system for mobile communications (Global System of Mobile Communication, GSM), code division multiple access (Code Division Multiple Access, CDMA) system, wideband code division multiple access (Wideband Code Division Multiple Access, WCDMA) system, general Packet Radio Service (GPRS), long term evolution (Long Term Evolution, LTE) system, LTE frequency division duplex (Frequency Division Duplex, FDD) system, LTE time division duplex (Time Division Duplex, TDD) system, long term evolution advanced (Advanced Long Term Evolution, LTE-a) system, new Radio (NR) system, NR system evolution system, LTE on unlicensed band (LTE-based access to Unlicensed spectrum, LTE-U) system, NR-U system, universal mobile telecommunications system (Universal Mobile Telecommunication System, UMTS), global interconnect microwave access (Worldwide Interoperability for Microwave Access, wiMAX) communication system, wireless local area network (Wireless Local Area Networks, WLAN), wireless fidelity (WIRELESS FIDELITY, WIFI), next generation communication system or other communication system, and the like.

Generally, the number of connections supported by the conventional Communication system is limited and easy to implement, however, with the development of Communication technology, the mobile Communication system will support not only conventional Communication but also, for example, device-to-Device (D2D) Communication, machine-to-machine (Machine to Machine, M2M) Communication, machine type Communication (MACHINE TYPE Communication, MTC), inter-vehicle (Vehicle to Vehicle, V2V) Communication, and internet of vehicles (Vehicle to Everything, V2X) systems. The embodiments of the present application may also be applied to these communication systems.

Fig. 4 is a flow chart illustrating a method of determining the effectiveness of a timing advance provided by an exemplary embodiment of the present application. The method may be applied in a terminal device in a communication system as shown in fig. 3, and the method may comprise the following step 410 or step 420:

Step 410: after the CG-SDT is initiated, a first timer is started, and the validity of the TA in the subsequent transmission stage is maintained through the first timer.

Small Data Transfer (SDT) is a data transfer mode configured for a terminal device in an inactive state. The small data transfer procedure does not require the establishment of an RRC connection between the terminal device and the network device. For terminal equipment with small data volume and low transmission frequency, if the data transmission can be performed after the RRC connection with the network equipment is restored only through the connection establishment restoration process, the terminal equipment needs to return to an inactive state after the data transmission is completed, and the power consumption of the terminal equipment is large. By performing the small data transmission process, the terminal device can avoid performing the conversion of the connection state, thereby reducing the power consumption of the terminal device.

The small data transmission includes: small data transfer (i.e., CG-SDT) based on preconfigured resources (CG); or, a small data transmission procedure based on random access (i.e., RA-SDT).

In the embodiment of the application, the terminal equipment initiates CG-SDT and utilizes the resources preconfigured by the network equipment to carry out data transmission. The SDT procedure supports subsequent (sub-sequence) transmissions, and the subsequent transmission stage refers to that the terminal device continues to keep sending/receiving data in an inactive state after completing the first uplink transmission.

Wherein the first timer is a timer for maintaining the validity of the TA of the subsequent transmission phase of the CG-SDT. Illustratively, the TA is considered valid during operation of the first timer in the subsequent transmission phase of the CG-SDT.

Optionally, the first timer includes: timer introduced for CG-SDT; or, the first timer includes: a timer introduced for the connected terminal device.

That is, the first timer may be a timer configured by the network device for the terminal device and dedicated to CG-SDT, where the timer may be denoted as SDT-TAT, or may be TAT used by the terminal device in a connected state.

Step 420: after the CG-SDT is initiated, the validity of the TA for the subsequent transmission phase is maintained based on the first RSRP delta.

The first RSRP variable quantity is an RSRP variable quantity determined by an RSRP measurement result before the terminal equipment performs data transmission in a subsequent transmission stage of CG-SDT.

Optionally, maintaining the validity of the TA of the subsequent transmission phase based on the first RSRP variable quantity includes: and comparing the first RSRP variation with an RSRP threshold, and if the first RSRP variation is not larger than the RSRP threshold, considering TA to be effective.

Optionally, the RSRP threshold is network device configured, or predefined in the protocol standard.

Illustratively, before step 410, the terminal device in a connected state receives a first message sent by the network device, where the first message includes an RSRP threshold for determining whether the TA is valid; in addition, the first message at least includes CG-SDT resource configuration, and the first message may be RRCRELEASE messages.

In summary, in the technical solution provided in this embodiment, for the subsequent transmission stage of CG-SDT, the terminal device may maintain the validity of the TA through a timer, or may also maintain the validity of the TA through the RSRP variable, so as to provide an implementation manner for determining the validity of the TA, so that the terminal device may perform uplink transmission based on the valid TA.

In an alternative embodiment based on fig. 4, the terminal device confirms the validity of the TA by RSRP variation when initiating CG-SDT.

Fig. 5 is a flow chart illustrating a method of determining the validity of a timing advance provided by an exemplary embodiment of the present application. The method may be applied in a terminal device in a communication system as shown in fig. 3, and the method may comprise the following steps 510 to 530:

step 510: the validity of the TA is confirmed by the second RSRP change when the CG-SDT is initiated.

It will be appreciated that for RA-SDT, the terminal device may acquire a valid TA through a random access procedure, whereas for CG-SDT, the terminal device needs to ensure that a valid TA exists when initiating CG-SDT, since it does not include a random access procedure.

In the embodiment of the application, when the CG-SDT is initiated, the terminal equipment confirms the validity of the TA through the second RSRP variation.

The second RSRP variable quantity is an RSRP variable quantity determined by the terminal equipment through an RSRP measurement result when judging whether to initiate CG-SDT.

Optionally, confirming the validity of the TA by the second RSRP variable quantity includes: and comparing the second RSRP variation with an RSRP threshold, and if the second RSRP variation is not larger than the RSRP threshold, considering TA to be effective.

Optionally, step 510 includes:

S11, obtaining a second RSRP variation based on the third RSRP measurement result and the fourth RSRP measurement result.

Wherein the third RSRP measurement result is the RSRP measurement result when the third timing advance command is received, and the third timing advance command is the timing advance command received last time; the fourth RSRP measurement result is an RSRP measurement result corresponding to a judgment time point, and the judgment time point is a time point for judging whether to initiate CG-SDT.

And S12, when the second RSRP variation is not larger than the RSRP threshold, confirming that the TA corresponding to the judging time point is valid.

Optionally, the RSRP threshold includes: a first sub-RSRP threshold, which is a threshold corresponding to the RSRP variation being an increment; and the second sub-RSRP threshold is a threshold corresponding to the RSRP variation being the reduction amount.

The first sub-RSRP threshold and the second sub-RSRP threshold may be the same value or different values, which is not limited in the present application.

The downlink RSRP measurement result when the terminal device receives the timing advance command for the last time is an example; and if the downlink RSRP measurement result of the terminal equipment when judging whether to trigger CG-SDT is B, obtaining a second RSRP variation based on A and B. Under the condition that the second RSRP variation is an increasing amount, if the second RSRP variation is not larger than the first sub-RSRP threshold, confirming that the current TA is valid; and under the condition that the second RSRP variation is reduced, if the second RSRP variation is not greater than a second sub-RSRP threshold, confirming that the current TA is valid.

The timing advance command may be included in a RRCRELEASE message, where the RRCRELEASE message is used to instruct the terminal device to enter the inactive state, or may be included in an instruction message before RRCRELEASE, where the instruction message may be any one of the following: downlink Control information (Downlink Control Information, DCI), medium access Control (Medium Access Control, MAC) Control Element (CE), RRC message.

It can be appreciated that, since the terminal device confirms the validity of the TA through the RSRP variable when the CG-SDT is initiated, the validity judgment at this time corresponds to only the time point when the CG-SDT is initiated, and thus, for the subsequent transmission stage of the CG-SDT, the terminal device still needs to continue to judge the validity of the TA, and the terminal device determines the validity of the TA by executing the following step 520 or step 530.

Step 520: after the CG-SDT is initiated, a first timer is started, and the validity of the TA in the subsequent transmission stage is maintained through the first timer.

The specific embodiment of this step may be referred to above in step 410, and will not be described herein.

Step 530: after the CG-SDT is initiated, the validity of the TA for the subsequent transmission phase is maintained based on the first RSRP delta.

The specific embodiment of this step may be referred to above in step 420, and will not be described herein.

In summary, the technical solution provided in this embodiment, when initiating CG-SDT for a terminal device, confirms the scenario of the validity of TA through RSRP variable quantity, and the terminal device continues to determine the validity of TA in the subsequent transmission stage of CG-SDT, so as to avoid performing unnecessary determination operation of validity of timing advance.

As described above, in the embodiment of the present application, two different technical solutions are provided to perform the determination of the validity of the TA in the subsequent transmission stage of CG-SDT, which will be further described below.

Scheme one: after the CG-SDT is initiated, the terminal equipment starts a first timer, and the validity of the TA in the subsequent transmission stage is maintained through the first timer.

Fig. 6 is a flow chart illustrating a method of determining the effectiveness of a timing advance provided by an exemplary embodiment of the present application. The method may be applied in a communication system as shown in fig. 3, and the method may include the following steps 610 to 630:

Step 610: the network device sends a first feedback message to the terminal device.

Correspondingly, the terminal equipment receives a first feedback message sent by the network equipment.

The first feedback message is used for determining whether to start the first timer after the terminal equipment initiates the CG-SDT. The first timer is used to maintain the validity of the TA for the subsequent transmission phase.

The first feedback message may be, for example, any one of the following: DCI, MACCE and RRC message.

Step 620: the terminal device determines to start a first timer based on the first feedback message.

Step 630: the terminal equipment maintains the validity of the TA in the subsequent transmission stage through the first timer.

That is, after the terminal device starts CG-SDT and receives the first feedback message, it determines, according to the content in the first feedback message, whether to start the first timer to maintain the validity of the TA in the subsequent transmission stage.

In one possible implementation, the first feedback message includes: the first indication information is used for indicating to start the first timer.

Correspondingly, the terminal device maintains the validity of the TA in the subsequent transmission stage through the first timer, and the method comprises the following steps: during operation of the first timer, the terminal device confirms that the TA is valid in a subsequent transmission phase.

That is, in the case that the first feedback message received by the terminal device includes the first indication information, the terminal device correspondingly starts the first timer based on the first indication information, and considers the TA currently maintained to be valid during the operation of the first timer.

In another possible implementation, the first feedback message includes: a first timing advance command indicating a timing advance measurement value N _TA.

Correspondingly, the terminal device maintains the validity of the TA in the subsequent transmission stage through the first timer, and the method comprises the following steps: during operation of the first timer, the adjusted TA is confirmed to be valid in a subsequent transmission phase, the adjusted TA being a TA value adjusted based on N _TA.

It is understood that TA is (N _TA+N _{TA offset}) Tc. Wherein N _TA is the measurement value sent to the terminal device as part of the timing advance command; n _TAOffset is a fixed value that varies according to different frequency bands and subcarrier spacing; tc is the basic time unit of the communication system. In the case that N _TA is included in the first timing advance command, the terminal device may obtain the adjusted TA based on the above formula.

That is, in the case that the first feedback message received by the terminal device includes the first timing advance command, the terminal device determines the adjusted TA based on N _TA in the first timing advance command, and correspondingly starts the first timer, and considers the adjusted TA to be valid during the operation of the first timer.

In summary, for the subsequent transmission stage of CG-SDT, the terminal device may maintain the validity of the TA through a timer, thereby providing an implementation manner for determining the validity of the TA, so that the terminal device may perform uplink transmission based on the valid TA.

Scheme II: after initiating CG-SDT, the terminal device maintains validity of the TA at a subsequent transmission stage based on the first RSRP variable.

Fig. 7 is a flow chart illustrating a method of determining the validity of a timing advance provided by an exemplary embodiment of the present application. The method may be applied in a terminal device in a communication system as shown in fig. 3, and the method may comprise the following steps 710 to 720:

step 710: after the CG-SDT is initiated, a first RSRP variation is obtained based on the first RSRP measurement result and the second RSRP measurement result.

Wherein the first RSRP measurement is an RSRP measurement when a second timing advance command is received, the second timing advance command being a last received timing advance command; the second RSRP measurement is the RSRP measurement before the arrival of the resource transmission occasion.

The resource transmission opportunity is an opportunity for data transmission in a subsequent transmission stage. Optionally, the resource transmission occasion includes: CG timing; or DG timing; or, a physical uplink control channel (Physical Uplink Control Channel, PUCCH) transmission occasion.

Step 720: and under the condition that the first RSRP variation is not larger than the RSRP threshold, confirming that the TA corresponding to the resource transmission opportunity is valid.

That is, the terminal device completes the validity verification of the TA based on the comparison of the RSRP variation and the RSRP threshold before each CG occasion or DG occasion for data transmission or PUCCH transmission occasion arrives. For example: the terminal equipment has uplink data newly transmitted or retransmitted, and the terminal equipment completes the validity verification of the TA before the CG time or the DG time or the PUCCH transmission time arrives.

Exemplary, the downlink RSRP measurement result when the terminal device receives the timing advance command last time is C; and if the downlink RSRP measurement result before the terminal equipment arrives at the CG time or the DG time or the PUCCH transmission time is D, the first RSRP variation can be obtained based on C and D. Under the condition that the first RSRP variation is an increasing amount, if the first RSRP variation is not larger than a first sub-RSRP threshold, confirming that the current TA is valid; and under the condition that the first RSRP variation is reduced, if the first RSRP variation is not greater than the second sub-RSRP threshold, confirming that the current TA is valid.

The timing advance command may be included in a RRCRELEASE message, where the RRCRELEASE message is used to instruct the terminal device to enter the inactive state, or may be included in an instruction message before RRCRELEASE, or may be included in an instruction message after RRCRELEASE, where the instruction message may be any one of the following: DCI, MACCE and RRC message.

In summary, for the technical solution provided in this embodiment, for the subsequent transmission stage of CG-SDT, the terminal device may maintain the validity of the TA through the RSRP variable, thereby providing an implementation manner for determining the validity of the TA, so that the terminal device may perform uplink transmission based on the valid TA.

The technical solution provided by the present application is described below in an exemplary manner with reference to fig. 8.

In one possible implementation, after the terminal device initiates the CG-SDT, the first timer is started to maintain the validity of the TA at a subsequent transmission stage in the CG-SDT process.

Exemplary, as shown in fig. 8 (a):

1) The terminal device receives a timing advance Command (TIMING ADVANCE Command, TAC) at a time point t1, so that the terminal device adjusts the current TA to be the first TA based on the N _TA value in the TAC.

2) The terminal device receives RRCRELEASE a message at a time point t2, so as to enter an rrc_inactive state, where the RRCRELEASE message includes an RSRP threshold for determining whether the TA is valid.

3) At a time point t3, the terminal equipment judges whether a certain condition is met, and if so, the terminal equipment determines to initiate CG-SDT, wherein the condition comprises: the TA is valid, and the terminal equipment judges whether the TA is valid or not based on the comparison of the RSRP variation and the RSRP threshold.

4) At the time point t4, the terminal equipment receives the first feedback message, determines to start a first timer according to the content of the first feedback message, and uses the first timer to maintain the validity of the first TA.

5) At the time point t5, the terminal device receives the TAC again, so the terminal device adjusts the current TA to be the second TA based on the N _TA value in the TAC, the terminal device correspondingly restarts the first timer, and the validity of the second TA is maintained by using the first timer.

6) At time point t6, the terminal device receives RRCRELEASE the message, thereby ending the CG-SDT and terminating the first timer.

In another possible implementation manner, after the terminal device initiates the CG-SDT, in a subsequent transmission stage in the CG-SDT process, the validity of the TA is determined by the RSRP variable quantity before each data transmission based on the resource transmission opportunity.

Exemplary, as shown in fig. 8 (b):

1) The terminal equipment receives the TAC at a time point t1, so that the terminal equipment adjusts the current TA to be the first TA based on an N _TA value in the TAC, and the RSRP measurement result at the moment is the first RSRP measurement result.

4) The time point t4 is the time point when the resource transmission opportunity arrives, the RSRP measurement result before the time point t4 is the second RSRP measurement result, the terminal equipment obtains the RSRP variation based on the second RSRP measurement result and the first RSRP measurement result, and under the condition that the RSRP variation is not greater than the RSRP threshold, the first TA is considered to be valid, so that the data transmission is performed by using the resource transmission opportunity at the time point t 4.

5) The time point t5 is the time point when another resource transmission opportunity arrives, the RSRP measurement result before the time point t5 is a third RSRP measurement result, the terminal equipment obtains the RSRP variation based on the third RSRP measurement result and the first RSRP measurement result, and under the condition that the RSRP variation is not greater than the RSRP threshold, the first TA is considered to be valid, so that the resource transmission opportunity is utilized to transmit data at the time point t 5.

The above-described method embodiments may be implemented individually or in combination, and the present application is not limited thereto.

In the above-described respective embodiments, the steps performed by the terminal device may individually implement the determination method of the validity of the timing advance to the terminal device side, and the steps performed by the network device may individually implement the determination method of the validity of the timing advance to the network device side.

Fig. 9 is a block diagram showing a configuration of a timing advance validity determining apparatus according to an exemplary embodiment of the present application, which may be implemented as a terminal device or as a part of a terminal device, the apparatus including: a validity maintenance module 902;

Or alternatively, the first and second heat exchangers may be,

The validity maintenance module 902 is configured to maintain, after the CG-SDT is initiated, validity of the TA in the subsequent transmission stage based on a first reference signal received power RSRP variable.

In an alternative embodiment, the validity maintenance module 902 includes: a timer starting unit;

the timer starting unit is used for receiving a first feedback message sent by the network equipment; based on the first feedback message, it is determined to start the first timer.

In an alternative embodiment, the first feedback message includes: the first indication information is used for indicating to start the first timer; the validity maintenance module 902 includes: a validity determination unit;

the validity determining unit is configured to confirm, during operation of the first timer, that the TA is valid in the subsequent transmission phase.

In an alternative embodiment, the first feedback message includes: a first timing advance command for indicating a timing advance measurement value N _TA; the validity maintenance module 902 includes: a validity determination unit;

The validity determining unit is configured to confirm, during operation of the first timer, that the adjusted TA is valid in the subsequent transmission phase, where the adjusted TA is a TA value adjusted based on the N _TA.

In an alternative embodiment, the first timer includes: a timer introduced for the CG-SDT;

Or alternatively, the first and second heat exchangers may be,

The first timer includes: a timer introduced for the connected terminal device.

In an alternative embodiment, the validity maintenance module 902 includes: a change amount determination unit and a validity determination unit;

the change amount determining unit is used for obtaining the first RSRP change amount based on a first RSRP measurement result and a second RSRP measurement result;

the validity determining unit is configured to confirm, when the first RSRP variable is not greater than an RSRP threshold, that the TA corresponding to a resource transmission opportunity is valid, where the resource transmission opportunity is an opportunity for data transmission in the subsequent transmission stage;

Wherein the first RSRP measurement is an RSRP measurement when a second timing advance command is received, the second timing advance command being a last received timing advance command; the second RSRP measurement is an RSRP measurement before the arrival of the resource transmission opportunity.

In an alternative embodiment, the resource transmission occasion includes:

pre-configuring CG time;

Or alternatively, the first and second heat exchangers may be,

Dynamically scheduling DG opportunities;

Or alternatively, the first and second heat exchangers may be,

PUCCH transmission timing.

In an alternative embodiment, the apparatus further comprises: a validity confirmation module;

the validity confirming module is used for confirming the validity of the TA through a second RSRP variable when the CG-SDT is initiated.

In an alternative embodiment, the validity confirmation module includes: a change amount determination unit and a validity determination unit;

The change amount determining unit is used for obtaining the second RSRP change amount based on a third RSRP measurement result and a fourth RSRP measurement result;

the validity determining unit is configured to confirm, when the second RSRP variable quantity is not greater than an RSRP threshold, that the TA corresponding to a judgment time point is valid, where the judgment time point is a time point when whether to initiate the CG-SDT;

Wherein the third RSRP measurement result is an RSRP measurement result when a third timing advance command is received, and the third timing advance command is a timing advance command received last time; the fourth RSRP measurement result is an RSRP measurement result corresponding to the judgment time point.

In an alternative embodiment, the RSRP threshold includes:

A first sub-RSRP threshold, where the first sub-RSRP threshold is a threshold corresponding to the RSRP variation being an increment;

And the second sub-RSRP threshold is a threshold corresponding to the RSRP variation being a reduction amount.

Fig. 10 is a block diagram illustrating a timing advance validity determination apparatus according to an exemplary embodiment of the present application, where the apparatus may be implemented as a network device or as a part of a network device, and includes: a message sending module 1002;

the message sending module 1002 is configured to send a first feedback message to a terminal device;

the first feedback message is used for determining to start a first timer after the terminal equipment initiates the small data transmission CG-SDT based on the pre-configured resource, and the first timer is used for maintaining the validity of the TA in the subsequent transmission stage.

In an alternative embodiment, the first feedback message comprises: the first indication information is used for indicating to start the first timer;

Wherein the terminal device confirms that the TA is valid in the subsequent transmission stage during operation of the first timer.

In an alternative embodiment, the first feedback message includes: a first timing advance command for indicating a timing advance measurement value N _TA;

and the terminal equipment confirms that the adjusted TA is valid in the subsequent transmission stage during the operation of the first timer, wherein the adjusted TA is a TA value adjusted based on the N _TA.

Or alternatively, the first and second heat exchangers may be,

The first timer includes: a timer introduced for the connected terminal device.

In an alternative embodiment, the terminal device confirms the validity of the TA by a second RSRP variable when initiating the CG-SDT.

In an alternative embodiment, the terminal device obtains the second RSRP variable amount based on a third RSRP measurement result and a fourth RSRP measurement result;

The terminal equipment confirms that the TA corresponding to a judging time point is valid under the condition that the second RSRP variation is not more than an RSRP threshold, wherein the judging time point is a time point for judging whether the CG-SDT is initiated or not;

In an alternative embodiment, the RSRP threshold includes:

Fig. 11 shows a schematic structural diagram of a communication device (terminal device or network device) according to an exemplary embodiment of the present application, where the communication device 1100 includes: a processor 1101, a transceiver 1102, and a memory 1103.

The processor 1101 includes one or more processing cores, and the processor 1101 executes various functional applications by running software programs and modules.

The transceiver 1102 may be used to receive and transmit information, and the transceiver 1102 may be a communication chip.

The memory 1103 may be used for storing a computer program, and the processor 1101 is configured to execute the computer program to implement the steps performed by the communication device in the above-described method embodiment.

Further, the memory 1103 may be implemented by any type of volatile or nonvolatile memory device, including but not limited to: random-Access Memory (RAM) and Read-Only Memory (ROM), erasable programmable Read-Only Memory (EPROM), electrically erasable programmable Read-Only Memory (ELECTRICALLY ERASABLE PROGRAMMABLE READ-Only Memory, EEPROM), flash Memory or other solid state Memory technology, compact disc Read-Only (Compact Disc Read-Only Memory, CD-ROM), high density digital video disc (Digital Video Disc, DVD) or other optical storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices.

When the communication device is implemented as a terminal device, the processor 1101 and the transceiver 1102 in the embodiments of the present application may execute steps executed by the terminal device in any of the methods shown in fig. 4 to 7, which are not described herein.

In one possible implementation, when the communication device is implemented as a terminal device,

The processor 1101 is configured to start a first timer after initiating CG-SDT, and maintain validity of a TA in a subsequent transmission stage by the first timer;

Or alternatively, the first and second heat exchangers may be,

The processor 1101 is configured to maintain validity of the TA of the subsequent transmission phase based on a first RSRP delta after the CG-SDT is initiated.

When the communication device is implemented as a network device, the processor 1101 and the transceiver 1102 in the embodiments of the present application may execute steps executed by the network device in any of the methods shown in fig. 4 to 7, which are not described herein.

In one possible implementation, when the communication device is implemented as a network device,

The transceiver 1102 is configured to send a first feedback message to a terminal device;

In an exemplary embodiment, there is also provided a computer readable storage medium having stored therein at least one instruction, at least one program, a set of codes, or a set of instructions, loaded and executed by a processor to implement the method of determining the validity of a timing advance provided by the various method embodiments described above.

In an exemplary embodiment, a chip is also provided, the chip comprising programmable logic circuits and/or program instructions for implementing the method of determining the validity of a timing advance of the above-described aspects when the chip is run on a communication device.

In an exemplary embodiment, there is also provided a computer program product which, when run on a processor of a computer device, causes the communication device to perform the method of determining the validity of a timing advance as described in the above aspects.

It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program for instructing relevant hardware, where the program may be stored in a computer readable storage medium, and the storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.

The foregoing description of the preferred embodiments of the present application is not intended to limit the application, but rather, the application is to be construed as limited to the appended claims.

Claims

A method for determining the validity of a timing advance TA, the method comprising:

After initiating a small data transmission CG-SDT based on pre-configured resources, starting a first timer, and maintaining the validity of the TA in a subsequent transmission stage through the first timer;

Or alternatively, the first and second heat exchangers may be,

After the CG-SDT is initiated, maintaining the validity of the TA for the subsequent transmission phase based on a first reference signal received power, RSRP, variation.
The method of claim 1, wherein the starting the first timer comprises:

receiving a first feedback message sent by network equipment;

based on the first feedback message, it is determined to start the first timer.
The method of claim 2, wherein the first feedback message comprises: the first indication information is used for indicating to start the first timer;

The maintaining, by the first timer, the validity of the TA for a subsequent transmission phase includes:

During operation of the first timer, the TA is confirmed to be valid during the subsequent transmission phase.
The method of claim 2, wherein the first feedback message comprises: a first timing advance command for indicating a timing advance measurement value N _TA;

The maintaining, by the first timer, the validity of the TA for a subsequent transmission phase includes:

During operation of the first timer, confirming that the adjusted TA is valid for the subsequent transmission phase, the adjusted TA being a TA value adjusted based on the N _TA.
The method according to any one of claim 1 to 4, wherein,

The first timer includes: a timer introduced for the CG-SDT;

Or alternatively, the first and second heat exchangers may be,

The first timer includes: a timer introduced for the connected terminal device.
The method of claim 1, wherein the maintaining the validity of the TA for the subsequent transmission phase based on a first RSRP delta comprises:

based on a first RSRP measurement result and a second RSRP measurement result, obtaining a first RSRP variation;

Under the condition that the first RSRP variation is not larger than an RSRP threshold, confirming that the TA corresponding to the resource transmission opportunity is valid, wherein the resource transmission opportunity is the opportunity for data transmission in the subsequent transmission stage;

Wherein the first RSRP measurement is an RSRP measurement when a second timing advance command is received, the second timing advance command being a last received timing advance command; the second RSRP measurement is an RSRP measurement before the arrival of the resource transmission opportunity.
The method of claim 6, wherein the resource transmission opportunity comprises:

pre-configuring CG time;

Or alternatively, the first and second heat exchangers may be,

Dynamically scheduling DG opportunities;

Or alternatively, the first and second heat exchangers may be,

Physical uplink control channel PUCCH transmission occasion.
The method according to any one of claims 1 to 7, further comprising:

upon initiation of the CG-SDT, the validity of the TA is confirmed by a second RSRP delta.
The method of claim 8, wherein said confirming the validity of the TA with the second RSRP delta comprises:

Obtaining the second RSRP variation based on the third RSRP measurement result and the fourth RSRP measurement result;

Under the condition that the second RSRP variation is not larger than an RSRP threshold, confirming that the TA corresponding to a judging time point is valid, wherein the judging time point is a time point for judging whether the CG-SDT is initiated or not;

Wherein the third RSRP measurement result is an RSRP measurement result when a third timing advance command is received, and the third timing advance command is a timing advance command received last time; the fourth RSRP measurement result is an RSRP measurement result corresponding to the judgment time point.
The method according to claim 6 or 9, wherein the RSRP threshold comprises:

A first sub-RSRP threshold, where the first sub-RSRP threshold is a threshold corresponding to the RSRP variation being an increment;

And the second sub-RSRP threshold is a threshold corresponding to the RSRP variation being a reduction amount.
A method for determining the validity of a timing advance TA, the method comprising:

Sending a first feedback message to terminal equipment;

the first feedback message is used for determining to start a first timer after the terminal equipment initiates the small data transmission CG-SDT based on the pre-configured resource, and the first timer is used for maintaining the validity of the TA in the subsequent transmission stage.
The method of claim 11, wherein the step of determining the position of the probe is performed,

The first feedback message includes: the first indication information is used for indicating to start the first timer;

wherein the terminal device confirms that the TA is valid in the subsequent transmission stage during operation of the first timer.
The method of claim 11, wherein the step of determining the position of the probe is performed,

The first feedback message includes: a first timing advance command for indicating a timing advance measurement value N _TA;

and the terminal equipment confirms that the adjusted TA is valid in the subsequent transmission stage during the operation of the first timer, wherein the adjusted TA is a TA value adjusted based on the N _TA.
The method according to any one of claims 11 to 13, wherein,

The first timer includes: a timer introduced for the CG-SDT;

Or alternatively, the first and second heat exchangers may be,

The first timer includes: a timer introduced for the connected terminal device.
The method according to any one of claims 11 to 14, wherein,

And when the terminal equipment initiates the CG-SDT, confirming the validity of the TA through a second RSRP variable.
The method of claim 15, wherein the step of determining the position of the probe is performed,

The terminal equipment obtains the second RSRP variation based on a third RSRP measurement result and a fourth RSRP measurement result;

The terminal equipment confirms that the TA corresponding to a judging time point is valid under the condition that the second RSRP variation is not more than an RSRP threshold, wherein the judging time point is a time point for judging whether the CG-SDT is initiated or not;

Wherein the third RSRP measurement result is an RSRP measurement result when a third timing advance command is received, and the third timing advance command is a timing advance command received last time; the fourth RSRP measurement result is an RSRP measurement result corresponding to the judgment time point.
The method of claim 16, wherein the RSRP threshold comprises:

A first sub-RSRP threshold, where the first sub-RSRP threshold is a threshold corresponding to the RSRP variation being an increment;

And the second sub-RSRP threshold is a threshold corresponding to the RSRP variation being a reduction amount.
An apparatus for determining the validity of a timing advance TA, the apparatus comprising: a validity maintenance module;

The validity determining module is used for starting a first timer after initiating the small data transmission CG-SDT based on the pre-configured resource, and maintaining the validity of the TA in the subsequent transmission stage through the first timer;

Or alternatively, the first and second heat exchangers may be,

The validity maintenance module is configured to maintain validity of the TA in the subsequent transmission stage based on a first reference signal received power RSRP variable after the CG-SDT is initiated.
The apparatus of claim 18, wherein the validity maintenance module comprises: a timer starting unit;

the timer starting unit is used for receiving a first feedback message sent by the network equipment; based on the first feedback message, it is determined to start the first timer.
The apparatus of claim 19, wherein the first feedback message comprises: the first indication information is used for indicating to start the first timer; the validity maintenance module includes: a validity determination unit;

the validity determining unit is configured to confirm, during operation of the first timer, that the TA is valid in the subsequent transmission phase.
The apparatus of claim 19, wherein the first feedback message comprises: a first timing advance command for indicating a timing advance measurement value N _TA; the validity maintenance module includes: a validity determination unit;

The validity determining unit is configured to confirm, during operation of the first timer, that the adjusted TA is valid in the subsequent transmission phase, where the adjusted TA is a TA value adjusted based on the N _TA.
The device according to any one of claims 18 to 21, wherein,

The first timer includes: a timer introduced for the CG-SDT;

Or alternatively, the first and second heat exchangers may be,

The first timer includes: a timer introduced for the connected terminal device.
The apparatus of claim 18, wherein the validity maintenance module comprises: a change amount determination unit and a validity determination unit;

the change amount determining unit is used for obtaining the first RSRP change amount based on a first RSRP measurement result and a second RSRP measurement result;

the validity determining unit is configured to confirm, when the first RSRP variable is not greater than an RSRP threshold, that the TA corresponding to a resource transmission opportunity is valid, where the resource transmission opportunity is an opportunity for data transmission in the subsequent transmission stage;

Wherein the first RSRP measurement is an RSRP measurement when a second timing advance command is received, the second timing advance command being a last received timing advance command; the second RSRP measurement is an RSRP measurement before the arrival of the resource transmission opportunity.
The apparatus of claim 23, wherein the resource transmission opportunity comprises:

pre-configuring CG time;

Or alternatively, the first and second heat exchangers may be,

Dynamically scheduling DG opportunities;

Or alternatively, the first and second heat exchangers may be,

Physical uplink control channel PUCCH transmission occasion.
The apparatus according to any one of claims 18 to 24, further comprising: a validity confirmation module;

the validity confirming module is used for confirming the validity of the TA through a second RSRP variable when the CG-SDT is initiated.
The apparatus of claim 25, wherein the validity confirmation module comprises: a change amount determination unit and a validity determination unit;

The change amount determining unit is used for obtaining the second RSRP change amount based on a third RSRP measurement result and a fourth RSRP measurement result;

the validity determining unit is configured to confirm, when the second RSRP variable quantity is not greater than an RSRP threshold, that the TA corresponding to a judgment time point is valid, where the judgment time point is a time point when whether to initiate the CG-SDT;

Wherein the third RSRP measurement result is an RSRP measurement result when a third timing advance command is received, and the third timing advance command is a timing advance command received last time; the fourth RSRP measurement result is an RSRP measurement result corresponding to the judgment time point.
The apparatus of claim 23 or 26, wherein the RSRP threshold comprises:

A first sub-RSRP threshold, where the first sub-RSRP threshold is a threshold corresponding to the RSRP variation being an increment;

And the second sub-RSRP threshold is a threshold corresponding to the RSRP variation being a reduction amount.
An apparatus for determining the validity of a timing advance TA, the apparatus comprising: a message sending module;

the message sending module is used for sending a first feedback message to the terminal equipment;

the first feedback message is used for determining to start a first timer after the terminal equipment initiates the small data transmission CG-SDT based on the pre-configured resource, and the first timer is used for maintaining the validity of the TA in the subsequent transmission stage.
The apparatus of claim 28, wherein the device comprises a plurality of sensors,

The first feedback message includes: the first indication information is used for indicating to start the first timer;

wherein the terminal device confirms that the TA is valid in the subsequent transmission stage during operation of the first timer.
The apparatus of claim 28, wherein the device comprises a plurality of sensors,

The first feedback message includes: a first timing advance command for indicating a timing advance measurement value N _TA;

and the terminal equipment confirms that the adjusted TA is valid in the subsequent transmission stage during the operation of the first timer, wherein the adjusted TA is a TA value adjusted based on the N _TA.
The apparatus according to any one of claims 28 to 30, wherein,

The first timer includes: a timer introduced for the CG-SDT;

Or alternatively, the first and second heat exchangers may be,

The first timer includes: a timer introduced for the connected terminal device.
The apparatus according to any one of claims 28 to 31, wherein,

And when the terminal equipment initiates the CG-SDT, confirming the validity of the TA through a second RSRP variable.
The apparatus of claim 32, wherein the device comprises a plurality of sensors,

The terminal equipment obtains the second RSRP variation based on a third RSRP measurement result and a fourth RSRP measurement result;

The terminal equipment confirms that the TA corresponding to a judging time point is valid under the condition that the second RSRP variation is not more than an RSRP threshold, wherein the judging time point is a time point for judging whether the CG-SDT is initiated or not;

Wherein the third RSRP measurement result is an RSRP measurement result when a third timing advance command is received, and the third timing advance command is a timing advance command received last time; the fourth RSRP measurement result is an RSRP measurement result corresponding to the judgment time point.
The apparatus of claim 33, wherein the RSRP threshold comprises:

A first sub-RSRP threshold, where the first sub-RSRP threshold is a threshold corresponding to the RSRP variation being an increment;

And the second sub-RSRP threshold is a threshold corresponding to the RSRP variation being a reduction amount.
A terminal device, characterized in that the terminal device comprises: a processor; wherein,

The processor is used for starting a first timer after initiating the small data transmission CG-SDT based on the pre-configured resource, and maintaining the validity of the timing advance TA of the subsequent transmission stage through the first timer;

Or alternatively, the first and second heat exchangers may be,

The processor is configured to maintain validity of the TA for the subsequent transmission phase based on a first reference signal received power RSRP delta after the CG-SDT is initiated.
A network device, the network device comprising: a transceiver; wherein,

The transceiver is used for sending a first feedback message to the terminal equipment;

The first feedback message is used for determining to start a first timer after the terminal equipment initiates the small data transmission CG-SDT based on the pre-configured resource, and the first timer is used for maintaining the validity of the timing advance TA in the subsequent transmission stage.
A computer readable storage medium having stored therein executable instructions that are loaded and executed by a processor to implement the method of determining the validity of a timing advance of any one of claims 1 to 17.
A chip comprising programmable logic and/or program instructions for implementing the method of determining the validity of a timing advance according to any one of claims 1 to 17 when said chip is running.
A computer program product or computer program, characterized in that it comprises computer instructions stored in a computer-readable storage medium, from which a processor reads and executes the computer instructions to implement the method of determining the validity of a timing advance according to any of claims 1to 17.