WO2022011519A1

WO2022011519A1 - Data transmission method and terminal device

Info

Publication number: WO2022011519A1
Application number: PCT/CN2020/101734
Authority: WO
Inventors: 石聪; 林雪; 李海涛
Original assignee: Oppo广东移动通信有限公司
Priority date: 2020-07-13
Filing date: 2020-07-13
Publication date: 2022-01-20
Also published as: CN115553041B; CN115553041A

Abstract

A data transmission method and a terminal device, facilitating avoiding the data loss during inactive data transmission, and improving the user experience. The method comprises: when the terminal device performs the inactive data transmission, if the signal quality of a target cell meets a cell reselection criterion, the terminal device reselects the target cell; and the terminal device re-initiates the process of the inactive data transmission if the target cell satisfies an inactive data transmission trigger condition.

Description

Method and terminal device for data transmission

technical field

The embodiments of the present application relate to the field of communications, and in particular, to a data transmission method and a terminal device.

Background technique

In some scenarios, the terminal device can initiate data transmission in the inactive state (Inactive). The data transmission initiated in the inactive state can also be called inactive data transmission (IDT). During the IDT process, if The terminal device determines that it needs to go to another cell again, and the terminal device needs to enter an idle (IDLE) state, which causes the data loss of the IDT this time and affects the user experience.

SUMMARY OF THE INVENTION

The embodiments of the present application provide a data transmission method and terminal device, which are beneficial to ensure that IDT data is not lost and improve user experience.

In a first aspect, a data transmission method is provided, comprising: in the process of data transmission in an inactive state by a terminal device, if the signal quality of a target cell satisfies a cell reselection criterion, the terminal device reselects to the target cell cell; the terminal device re-initiates the process of data transmission in the inactive state when the target cell satisfies the trigger condition for data transmission in the inactive state.

In a second aspect, a method for data transmission is provided, including: in the process of data transmission in an inactive state by a terminal device, if the signal quality of a target cell satisfies a cell reselection criterion, the terminal device continues to perform the inactive state state data transmission process, and delay reselection to the target cell.

In a third aspect, a terminal device is provided for executing the method in the first aspect or any possible implementation manner of the first aspect. Specifically, the terminal device includes a unit for executing the method in the first aspect or any possible implementation manner of the first aspect.

In a fourth aspect, a terminal device is provided for executing the method in the second aspect or any possible implementation manner of the second aspect. Specifically, the network device includes a unit for executing the method in the second aspect or any possible implementation manner of the second aspect.

In a fifth aspect, a terminal device is provided, and the terminal device includes: a processor and a memory. The memory is used for storing a computer program, and the processor is used for calling and running the computer program stored in the memory to execute the method in the above-mentioned first aspect or each implementation manner thereof.

In a sixth aspect, a terminal device is provided, and the network device includes: a processor and a memory. The memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory to execute the method in the second aspect or each of its implementations.

In a seventh aspect, a chip is provided for implementing any one of the above-mentioned first aspect to the second aspect or the method in each implementation manner thereof.

Specifically, the chip includes: a processor for invoking and running a computer program from a memory, so that a device on which the chip is installed executes any one of the above-mentioned first to second aspects or each of its implementations method.

In an eighth aspect, a computer-readable storage medium is provided for storing a computer program, the computer program causing a computer to execute the method in any one of the above-mentioned first aspect to the second aspect or each of its implementations.

In a ninth aspect, a computer program product is provided, comprising computer program instructions, the computer program instructions causing a computer to execute the method in any one of the above-mentioned first to second aspects or the respective implementations thereof.

In a tenth aspect, there is provided a computer program which, when run on a computer, causes the computer to perform the method in any one of the above-mentioned first to second aspects or the respective implementations thereof.

Based on the above technical solutions, in the process of the terminal equipment performing the IDT, if there is a target cell that satisfies the cell reselection rule, the terminal equipment can reselect the target cell, and after reselecting the target cell, further When the target cell satisfies the IDT trigger condition, the IDT is re-initiated, which is beneficial to avoid the data loss of the IDT and improve the user experience.

Or, in the process of the terminal equipment performing the IDT, if there is a target cell that satisfies the cell reselection rule, the terminal equipment can continue to perform the current IDT and delay the cell reselection, which is beneficial to avoid the data loss of the IDT, Improve user experience.

Description of drawings

FIG. 1 is a schematic diagram of a communication system architecture provided by the present application.

FIG. 2 is a schematic diagram of a state transition of a terminal device provided by the present application.

FIG. 3 is a schematic diagram of an inactive terminal device RNA provided by the present application.

FIG. 4 is a schematic flowchart of an RNAU with context transfer provided by the present application.

FIG. 5 is a schematic flowchart of a context-free RNAU provided by the present application.

FIG. 6 is a schematic flowchart of a small data transmission provided by the present application.

FIG. 7 is a schematic flowchart of a data transmission method according to an embodiment of the present application.

FIG. 8 is a schematic flowchart of another data transmission method provided according to an embodiment of the present application.

FIG. 9 is a schematic block diagram of a terminal device provided according to an embodiment of the present application.

FIG. 10 is a schematic block diagram of another terminal device provided according to an embodiment of the present application.

FIG. 11 is a schematic block diagram of a communication device provided according to an embodiment of the present application.

FIG. 12 is a schematic block diagram of a chip provided according to an embodiment of the present application.

detailed description

The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. With regard to the embodiments in the present application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

The technical solutions of the embodiments of the present application can be applied to various communication systems, for example: a Global System of Mobile communication (GSM) system, a Code Division Multiple Access (CDMA) system, a wideband Code Division Multiple Access (CDMA) system (Wideband Code Division Multiple Access, WCDMA) system, General Packet Radio Service (General Packet Radio Service, GPRS), Long Term Evolution (Long Term Evolution, LTE) system, Advanced Long Term Evolution (Advanced long term evolution, LTE-A) system , New Radio (NR) system, evolution system of NR system, LTE (LTE-based access to unlicensed spectrum, LTE-U) system on unlicensed spectrum, NR (NR-based access to unlicensed spectrum) unlicensed spectrum, NR-U) system, Non-Terrestrial Networks (NTN) system, Universal Mobile Telecommunication System (UMTS), Wireless Local Area Networks (WLAN), Wireless Fidelity (Wireless Fidelity, WiFi), fifth-generation communication (5th-Generation, 5G) system or other communication systems, etc.

Generally speaking, traditional communication systems support a limited number of connections and are easy to implement. However, with the development of communication technology, mobile communication systems will not only support traditional communication, but also support, for example, Device to Device (Device to Device, D2D) communication, Machine to Machine (M2M) communication, Machine Type Communication (MTC), Vehicle to Vehicle (V2V) communication, or Vehicle to everything (V2X) communication, etc. , the embodiments of the present application can also be applied to these communication systems.

Optionally, the communication system in this embodiment of the present application may be applied to a carrier aggregation (Carrier Aggregation, CA) scenario, a dual connectivity (Dual Connectivity, DC) scenario, or a standalone (Standalone, SA) distribution. web scene.

Optionally, the communication system in the embodiment of the present application may be applied to an unlicensed spectrum, where the unlicensed spectrum may also be considered as a shared spectrum; or, the communication system in the embodiment of the present application may also be applied to a licensed spectrum, where, Licensed spectrum can also be considered unshared spectrum.

The embodiments of the present application describe various embodiments in conjunction with network equipment and terminal equipment, where the terminal equipment may also be referred to as user equipment (User Equipment, UE), access terminal, subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device, etc.

The terminal device can be a station (STATION, ST) in the WLAN, can be a cellular phone, a cordless phone, a Session Initiation Protocol (Session Initiation Protocol, SIP) phone, a wireless local loop (Wireless Local Loop, WLL) station, personal digital processing (Personal Digital Assistant, PDA) devices, handheld devices with wireless communication capabilities, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, next-generation communication systems such as end devices in NR networks, or future Terminal equipment in the evolved public land mobile network (Public Land Mobile Network, PLMN) network, etc.

In this embodiment of the present application, the terminal device can be deployed on land, including indoor or outdoor, handheld, wearable, or vehicle-mounted; it can also be deployed on water (such as ships, etc.); it can also be deployed in the air (such as airplanes, balloons, and satellites) superior).

In this embodiment of the present application, the terminal device may be a mobile phone (Mobile Phone), a tablet computer (Pad), a computer with a wireless transceiver function, a virtual reality (Virtual Reality, VR) terminal device, and an augmented reality (Augmented Reality, AR) terminal Equipment, wireless terminal equipment in industrial control, wireless terminal equipment in self driving, wireless terminal equipment in remote medical, wireless terminal equipment in smart grid , wireless terminal equipment in transportation safety, wireless terminal equipment in smart city or wireless terminal equipment in smart home, etc.

As an example and not a limitation, in this embodiment of the present application, the terminal device may also be a wearable device. Wearable devices can also be called wearable smart devices, which are the general term for the intelligent design of daily wear and the development of wearable devices using wearable technology, such as glasses, gloves, watches, clothing and shoes. A wearable device is a portable device that is worn directly on the body or integrated into the user's clothing or accessories. Wearable device is not only a hardware device, but also realizes powerful functions through software support, data interaction, and cloud interaction. In a broad sense, wearable smart devices include full-featured, large-scale, complete or partial functions without relying on smart phones, such as smart watches or smart glasses, and only focus on a certain type of application function, which needs to cooperate with other devices such as smart phones. Use, such as all kinds of smart bracelets, smart jewelry, etc. for physical sign monitoring.

In this embodiment of the present application, the network device may be a device for communicating with a mobile device, and the network device may be an access point (Access Point, AP) in WLAN, or a base station (Base Transceiver Station, BTS) in GSM or CDMA , it can also be a base station (NodeB, NB) in WCDMA, it can also be an evolved base station (Evolutional Node B, eNB or eNodeB) in LTE, or a relay station or access point, or in-vehicle equipment, wearable devices and NR networks The network equipment (gNB) in the PLMN network in the future evolution or the network equipment in the NTN network, etc.

As an example and not a limitation, in this embodiment of the present application, the network device may have a mobile feature, for example, the network device may be a mobile device. Optionally, the network device may be a satellite or a balloon station. For example, the satellite may be a low earth orbit (LEO) satellite, a medium earth orbit (MEO) satellite, a geostationary earth orbit (GEO) satellite, a High Elliptical Orbit (HEO) ) satellite etc. Optionally, the network device may also be a base station set in a location such as land or water.

In this embodiment of the present application, a network device may provide services for a cell, and a terminal device communicates with the network device through transmission resources (for example, frequency domain resources, or spectrum resources) used by the cell, and the cell may be a network device ( For example, the cell corresponding to the base station), the cell can belong to the macro base station, or it can belong to the base station corresponding to the small cell (Small cell). Pico cell), Femto cell (Femto cell), etc. These small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-speed data transmission services.

Exemplarily, a communication system 100 to which this embodiment of the present application is applied is shown in FIG. 1 . The communication system 100 may include a network device 110, and the network device 110 may be a device that communicates with a terminal device 120 (or referred to as a communication terminal, a terminal). The network device 110 may provide communication coverage for a particular geographic area, and may communicate with terminal devices located within the coverage area.

FIG. 1 exemplarily shows one network device and two terminal devices. Optionally, the communication system 100 may include multiple network devices and the coverage of each network device may include other numbers of terminal devices. This application The embodiment does not limit this.

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

It should be understood that, in the embodiments of the present application, a device having a communication function in the network/system may be referred to as a communication device. Taking the communication system 100 shown in FIG. 1 as an example, the communication device may include a network device 110 and a terminal device 120 with a communication function, and the network device 110 and the terminal device 120 may be the specific devices described above, which will not be repeated here. ; The communication device may also include other devices in the communication system 100, such as other network entities such as a network controller, a mobility management entity, etc., which are not limited in this embodiment of the present application.

It should be understood that the terms "system" and "network" are often used interchangeably herein. The term "and/or" in this article is only an association relationship to describe the associated objects, indicating that there can be three kinds of relationships, for example, A and/or B, it can mean that A exists alone, A and B exist at the same time, and A and B exist independently B these three cases. In addition, the character "/" in this document generally indicates that the related objects are an "or" relationship.

It should be understood that the "instruction" mentioned in the embodiments of the present application may be a direct instruction, an indirect instruction, or an associated relationship. For example, if A indicates B, it can indicate that A directly indicates B, for example, B can be obtained through A; it can also indicate that A indicates B indirectly, such as A indicates C, and B can be obtained through C; it can also indicate that there is an association between A and B relation.

In the description of the embodiments of the present application, the term "corresponding" may indicate that there is a direct or indirect corresponding relationship between the two, or may indicate that there is an associated relationship between the two, or indicate and be instructed, configure and be instructed configuration, etc.

It should be understood that in this embodiment of the present application, NR can also be deployed independently. In the 5G network environment, in order to reduce air interface signaling, quickly restore wireless connections, and quickly restore data services, a new Radio Resource Control (Radio Resource Control) is defined. , RRC) state, namely RRC_INACTIVE (inactive) state. This state is different from the RRC_IDLE (idle) and RRC_CONNECTED (connected) states.

In the RRC_IDLE state: mobility is based on terminal device cell selection and reselection, paging is initiated by the Core Network (CN), and the paging area is configured by the CN. There is no terminal device access layer (Access Stratum, AS) context on the base station side, nor does an RRC connection exist.

In the RRC_CONNECTED state: there is an RRC connection, and the base station and the terminal device have the terminal device AS context. The network equipment knows the location of the terminal equipment at the specific cell level. Mobility is the mobility of network device control. Unicast data can be transmitted between the terminal equipment and the base station.

RRC_INACTIVE: Mobility is based on terminal device cell selection and reselection, there is a connection between CN-NR, terminal device AS context exists on a certain base station, paging is triggered by Radio Access Network (RAN), based on The paging area of the RAN is managed by the RAN, and the network equipment knows the location of the terminal device based on the level of the paging area of the RAN.

It should be noted that, in this embodiment of the present application, the inactive state may also be referred to as a deactivated state, which is not limited in the present application.

The network device can control the state transition of the terminal device. For example, as shown in Figure 2, the terminal device in the RRC_CONNECTED state can enter the RRC_IDLE state by releasing the RRC connection; the terminal device in the RRC_IDLE state can enter the RRC_CONNECTED state by establishing an RRC connection; The UE in the RRC_CONNECTED state can enter the RRC_INACTIVE state by releasing the RRC connection with Suspend; the UE in the RRC_INACTIVE state can enter the RRC_CONNECTED state by resuming the RRC connection, or it can enter the RRC_IDLE state by releasing the RRC connection.

It should be noted that the terminal device is in the RRC_INACTIVE state, and the terminal device autonomously returns to the idle state in the following cases:

When receiving CN's initial paging message;

When initiating the RRC recovery request, start the timer T319, if the timer times out;

When contention-based random access message 4 (Message4, MSG4) integrity protection verification fails;

When the cell is reselected to another radio access technology (Radio Access Technology, RAT);

Enter the camp on any cell state.

Characteristics of the RRC_INACTIVE state:

The connection between RAN and CN is maintained;

The terminal device and at least one gNB save the AS context;

The terminal equipment is reachable to the RAN side, and relevant parameters are configured by the RAN;

When the terminal equipment moves within the RAN Notification area (RNA) configured by the RAN, it does not need to notify the network side (core network equipment), but it needs to notify the network side (core network equipment) when it moves out of the RNA;

The UE moves within the RNA according to the cell selection reselection method.

It should be noted that the RNA can be specifically shown in Figure 3. In the RNA shown in Figure 3, the terminal equipment does not need to notify the network side when moving between the base station 1 and the base station 5, but when the terminal equipment moves to the base station 6 Or the base station 7 needs to notify the network side.

When the terminal device is in the RRC_INACTIVE state, the network device will configure the RRC_INACTIVE configuration parameters for the terminal device through the RRC Release dedicated signaling, for example, configure RNA, which is used to control the area where the terminal device performs cell selection reselection in the inactive state , which is also the initial paging range area of the RAN.

When the terminal equipment moves in the RNA area, it does not need to notify the network side, and follows the mobility behavior in the idle state, that is, the cell selection and reselection criteria. When the terminal device moves out of the paging area configured by the RAN, the terminal device will be triggered to restore the RRC connection and re-acquire the paging area configured by the RAN. When the terminal equipment has downlink data arriving, the gNB that maintains the connection between the RAN and the CN for the terminal equipment will trigger all cells in the RAN paging area to send paging messages to the terminal equipment, so that the terminal equipment in the INACTIVE state can restore the RRC connection. Data reception is performed. The terminal equipment in the INACTIVE state is configured with a RAN paging area. In order to ensure the reachability of the terminal equipment in this area, the terminal equipment needs to perform periodic location update according to the period configured by the network.

Therefore, the scenarios that trigger the terminal device to perform the RNA update include the RAN Notification Area Update (RNAU) timer timeout or the UE moving to an area other than the RNA.

It should be noted that when the target base station where the terminal device initiates the RRC connection recovery process is not the anchor base station, the anchor base station determines whether the context of the terminal device needs to be transferred to the target base station. Therefore, in general, the target base station will send the cause value (cause) carried in the RRC connection recovery request message initiated by the terminal device to the anchor base station in the process of requesting the terminal device context, and the anchor base station will decide whether to transfer the context of the terminal device to the target base station. . For example, periodic RAN location updates generally do not require context transfers.

For example, as shown in FIG. 4 , the RNAU with context migration is specifically implemented by the processes described in the following S11 to S19.

S11. The terminal equipment (UE) sends an RRC connection resume request (Resume Request) to the target base station (gNB), and the RRC connection resume request is used for RNA update;

S12. The target base station sends a request for extracting the UE context (RETRIEVE UE CONTEXT REQUEST) to the anchor base station (also referred to as the last serving base station (Last Serving gNB));

S13. The anchor base station sends a UE context extraction response (RETRIEVE UE CONTEXT RESPONSE) to the target base station;

S14. Set the UE to an inactive state (Send UE to INACTIVE);

S15. The target base station sends a data forwarding address indication (DATA FORWARDING ADDRESS INDICATION) to the anchor base station (optional);

S16. The target base station sends a path switching request to the Access and Mobility Management Function (AMF) entity;

S17. The AMF entity sends a path switching response to the target base station;

S18. The target base station sends an RRC release message to the terminal device;

S19. The target base station sends a UE context release message to the anchor base station.

For another example, as shown in FIG. 5 , the RNAU without context transfer is specifically implemented by the processes described in the following S21 to S24.

S21. The terminal equipment (UE) sends an RRC connection resume request (Resume Request) to the target base station (gNB), and the RRC connection resume request is used for RNA update;

S22. The target base station sends a request for extracting UE context (RETRIEVE UE CONTEXT REQUEST) to the anchor base station (also referred to as the last serving base station (Last Serving gNB));

S23. The anchor base station sends to the target base station the failure to extract the UE context (RETRIEVE UE CONTEXT FAILURE);

S24. The target base station sends an RRC release message to the terminal device.

In LTE, small data transmission (EDT) is introduced. During this process, the terminal device may always remain in an idle state or a suspend state or an inactive state to complete the uplink. and/or the transmission of downstream small packets. For example, as shown in FIG. 6 , the user plane data transmission scheme can be specifically implemented by the processes described in the following S31 to S38.

S31. The UE sends an RRC connection resumption request (Resume Request) to the eNB, where the RRC connection resumption request includes uplink data (ie small data transmission) sent by the UE;

S32. The eNB sends a UE context recovery request (UE CONTEXT RESUME REQUEST) to a mobility management entity (Mobility Management Entity, MME);

S33. Modify the bearer between the MME and the Serving Gateway (Serving Gateway, SGW);

S34. The MME sends a UE context recovery response (UE CONTEXT RESUME RESPONSE) to the eNB;

S35. The eNB sends the uplink data (ie small data transmission) sent by the UE to the SGW;

S36. The SGW receives the downlink data sent by the eNB (optional);

S37. Suspend the process between the eNB and the SGW, and modify the bearer between the MME and the SGW;

S38. The eNB sends an RRC connection release message to the UE, optionally, the RRC connection release message includes downlink data.

It should be noted that, for small data transmission, the UE does not actually enter the connected state, and completes the transmission of small data packets. This type of transmission is different from entering the connected state to transmit Mobile Broadband (MBB) services.

During the uplink small data transmission (UP-EDT) process, the UE will still perform the cell reselection process, that is, if the signal quality of the current serving cell deteriorates enough to meet the conditions for reselection to another cell, the UE will Execute the cell reselection process. If the cell reselection process occurs during the UP-EDT process, the UE will terminate the ongoing UP-EDT process. For the UE in the RRC inactive state, if the UE undergoes cell reselection during the RRC recovery process, the UE needs to enter the RRC idle state.

Based on the above process, if the UE initiates the IDT in the RRC inactive state, during this process, the terminal device may also perform cell reselection-related measurements and cell reselection-related criterion evaluation. If the terminal equipment determines that the signal quality of a neighboring cell meets the cell reselection criterion, and the neighboring cell needs to be switched, in this case, how to process this IDT transmission to avoid data loss is an urgent problem to be solved.

FIG. 7 is a schematic flowchart of a data transmission method 200 according to an embodiment of the present application. The method 200 may be executed by the terminal device in the communication system shown in FIG. 1 , and as shown in FIG. 7 , the method 200 may include at least some of the following contents:

S210, in the process that the terminal device performs data transmission in the inactive state, if the signal quality of the target cell satisfies the cell reselection criterion, the terminal device reselects to the target cell;

S220, the terminal device re-initiates the process of data transmission in the inactive state when the target cell satisfies the triggering condition for data transmission in the inactive state.

It should be understood that the cell reselection rules in the embodiments of the present application may refer to the specific implementation of the related technology of cell reselection, which is not limited in the present application.

In this embodiment of the present application, when initiating IDT transmission, the terminal device is in an RRC inactive state, or inactive state.

In this embodiment, in the process of performing IDT, the terminal device may perform cell reselection-related measurement and cell reselection-related criterion evaluation. If there is a target cell that satisfies the cell reselection criterion, the terminal device may Terminate the IDT process, and reselect to a target cell that satisfies the cell reselection criteria.

Optionally, in this embodiment of the present application, the process of terminating the IDT by the terminal device includes at least one of the following:

The terminal device terminates the RRC connection recovery timer (that is, the T319 timer), wherein the RRC connection recovery timer is started when the terminal device initiates the RRC connection recovery establishment request message, and when the RRC message replied by the network device is received When the RRC connection recovery timer expires, the terminal device enters the IDLE state;

Suspend all SRBs and Data Radio Bearers (DRB) except Signaling Radio Bearers (Signaling Radio Bearers, SRB) 0;

Perform PDCP suspend operations for all DRBs;

remain inactive.

Further, in some embodiments, the terminal device may directly re-initiate the IDT process after reselection to the target cell, that is, transmit the last terminated IDT, so as to avoid data loss of the IDT.

In other embodiments, after reselection to the target cell, the terminal device may also determine whether to re-initiate the IDT process according to whether the target cell satisfies the IDT trigger condition.

For example, when the target cell satisfies the IDT trigger condition, the terminal may re-initiate the IDT process, that is, transmit the last terminated IDT, so as to avoid data loss of the IDT.

For another example, the terminal may not initiate an IDT process when the target cell does not meet the IDT trigger condition. Further, the terminal device may trigger an RRC connection recovery procedure, for example, transmit the untransmitted data in the IDT through the RRC connection recovery procedure. Alternatively, the terminal device may also enter the IDLE state.

It should be noted that, in this embodiment of the present application, the process of re-initiating IDT or performing IDT through the RRC connection recovery process may refer to untransmitted data in the terminated IDT process, such as Packet Data Convergence Protocol (PDCP). ) layer reserved data, such as PDCP SDU, or may also refer to all data that needs to be transmitted to transmit the IDT process, which is not limited in this application.

It should be understood that, in this embodiment of the present application, whether the target cell satisfies the IDT trigger condition may be based on whether there is data to be transmitted on the terminal device, and whether the IDT is supported according to information such as resources and/or capabilities of the target cell transmission is confirmed.

When there is no data to be transmitted on the terminal device, it may be considered that the IDT process does not need to be initiated again. In this case, it may be considered that the target cell does not meet the IDT trigger condition.

When the target cell does not support resources for IDT, it may be considered that even if the target cell initiates the IDT process, it cannot be successfully executed. In this case, it may also be considered that the target cell does not meet the IDT triggering conditions.

When the maximum amount of data that can be transmitted by the target cell is less than the amount of data to be transmitted by the terminal device, it can be considered that even if the IDT process is initiated in the target cell, all data cannot be successfully transmitted. In this case, it can also be considered that The target cell does not meet the IDT trigger condition.

Therefore, in some embodiments, if there is data to be transmitted on the terminal device, the target cell supports resources for IDT, and the first threshold corresponding to the target cell is greater than or equal to the size of the data to be transmitted , in this case, it can be determined that the target cell satisfies the IDT trigger condition.

In other embodiments, if at least one of the following is not satisfied, the terminal device determines that the target cell does not meet the IDT trigger condition: there is data to be transmitted on the terminal device, and the target cell supports IDT resource, and the first threshold corresponding to the target cell is greater than or equal to the size of the data to be transmitted.

Optionally, the first threshold may be the maximum amount of data that the target cell can transmit.

Optionally, the first threshold may be configured through a broadcast message, or pre-configured, etc., which is not limited in this application.

Optionally, the existence of data to be transmitted in the terminal device may include that the PDCP layer of the terminal device reserves data to be transmitted, such as a PDCP service data unit (Service Data Unit, SDU).

Optionally, the resources for IDT may include, but are not limited to, random access channel (Random Access Channel, RACH) resources and/or semi-static resources, for example.

In the above, whether the target cell satisfies the IDT trigger condition is only an example, and the purpose of judging whether the target cell satisfies the IDT trigger condition is to determine whether the target cell can support the IDT whose transmission is terminated, as long as the judgment based on the concept design All methods fall within the protection scope of the present application.

In other embodiments of the present application, after reselection to the target cell, the terminal device may also determine whether to re-initiate the IDT process according to whether the target cell satisfies the IDT trigger condition within a certain period of time .

As an embodiment, after reselecting to the target cell, the terminal device may start a first timer, and during the running of the first timer, determine whether the target cell satisfies the IDT trigger condition according to whether the target cell satisfies the IDT trigger condition. Whether to restart the IDT process.

It should be understood that, in this embodiment of the present application, the role of the first timer is equivalent to enabling the terminal device to continue to remain in an inactive state for a period of time, and to a certain extent to ensure that IDT is re-initiated in the target cell process.

As example 1, if the target cell satisfies the IDT trigger condition before the first timer expires, the IDT process is re-initialized. Further, if the first timer has not been stopped at this time, the terminal device may also stop the first timer.

As example 2, if the target cell does not meet the IDT condition before the first timer expires, the process of IDT is not re-initiated. Further, the terminal device can trigger the RRC resume process, or enter the RRC IDLE state.

As example 3, if the target cell does not meet the IDT condition at a certain moment during the running period of the first timer, the process of IDT is not re-initiated, and the first timer is stopped. Further, the terminal device can trigger the RRC resume process, or enter the RRC IDLE state.

The determination by the terminal device that the target cell does not meet the IDT condition may be at any time during the running of the first timer. In this example 2, the terminal device may judge whether the target cell satisfies the IDT condition multiple times or periodically during the running of the first timer. Before the first timer expires, if the judgment result is the target cell If the IDT condition is not met, the corresponding action can be executed. In example 3, the terminal device determines not to re-initiate the IDT process by judging that the target cell does not meet the IDT condition at a certain moment during the running of the first timer, stops the first timer, and enters the IDLE state. That is to say, in Example 3, after reselection to the target cell, if it is determined that the target cell does not meet the IDT condition, the terminal device can directly switch to the idle state without waiting for the first timer to expire.

Therefore, in this embodiment of the present application, if the terminal device determines that there is a target cell that satisfies the cell reselection rule during the IDT process, the terminal device can terminate the current IDT and reselect to the target cell, and then After reselection to the target cell, the process of determining whether to re-initiate the IDT is further determined according to whether the target cell satisfies the IDT trigger condition, which is beneficial to avoid data loss of the IDT and improve user experience.

FIG. 8 is a schematic flowchart of a method for data transmission according to another embodiment of the present application. The method 300 may be executed by a terminal device in the communication system shown in FIG. 1 . As shown in FIG. 8 , the method 300 may include At least some of the following:

S310: During the process of the terminal equipment performing inactive data transmission, if the signal quality of the target cell satisfies the cell reselection criterion, the terminal equipment continues to perform the inactive data transmission process, and delays reselection to the target cell.

In this embodiment of the present application, when the IDT transmission is initiated, the terminal device is in an RRC inactive state or an inactive state.

In this embodiment, during the IDT process, the terminal device may perform cell reselection-related measurement and cell reselection-related criterion evaluation. If the terminal device determines that there is a target cell that satisfies the cell reselection criterion, the terminal device The terminal device may continue to perform the IDT process, and delay reselection to the target cell.

It should be noted that, in this embodiment of the present application, the process of the terminal device continuing to execute the IDT may refer to the terminal device continuing to transmit data that has not been transmitted in the IDT process, for example, a Packet Data Convergence Protocol (Packet Data Convergence Protocol, PDCP) layer reserved data, such as PDCP SDUs.

Optionally, in some embodiments, in the presence of a target cell that satisfies the cell reselection criteria, the terminal device may continue to perform the IDT process within a certain period of time, and delay reselection to the target cell community.

As an embodiment, when there is a target cell that satisfies the cell reselection criterion, the terminal device may start a second timer, and during the running of the second timer, continue to perform the IDT process, and delay the reselection to the selected cell. the target cell.

Further, the terminal device may also determine the time to perform cell reselection according to the execution of the IDT during the running of the second timer.

For example, if the IDT is successfully executed before the second timer expires, the terminal device stops the second timer and starts to perform cell reselection.

For another example, if the IDT is not successfully executed before the second timer expires, the terminal device terminates the IDT process, starts to perform cell reselection, and enters the RRC IDLE state.

Further, if the IDT is not successfully executed before the second timer expires, after reselection to the target cell, the terminal device may also determine whether the target cell satisfies the IDT trigger condition according to whether the target cell satisfies the IDT trigger condition. The process of the IDT is re-initiated.

For example, if the target cell satisfies the IDT trigger condition, determine the process of re-initiating the IDT.

For another example, if the target cell does not meet the IDT triggering condition, it is determined not to re-initiate the IDT process.

The specific implementation of the process of determining whether to re-initiate the IDT by the terminal device according to whether the target cell satisfies the IDT trigger condition refers to the relevant description in the method 200, which will not be repeated here.

Therefore, in this embodiment of the present application, if the terminal equipment determines that there is a target cell that satisfies the cell reselection rules during the IDT process, the terminal equipment can continue to perform the IDT this time, and delay the reselection to the target cell. The cell is beneficial to avoid data loss of IDT and improve user experience.

The method embodiments of the present application are described in detail above with reference to FIGS. 7 to 8 , and the device embodiments of the present application are described in detail below with reference to FIGS. 9 to 12 . It should be understood that the device embodiments and the method embodiments correspond to each other, and are similar to For the description, refer to the method embodiment.

FIG. 9 shows a schematic block diagram of a terminal device 400 according to an embodiment of the present application. As shown in FIG. 9, the terminal device 400 includes:

The processing unit 410, when the terminal equipment performs data transmission in the inactive state, if the signal quality of the target cell satisfies the cell reselection criterion, reselects the target cell.

Optionally, in some embodiments, the processing unit 410 is further configured to:

In the case that the target cell does not meet the triggering condition for the inactive data transmission, the process of the inactive data transmission is not re-initialized.

If the target cell satisfies the inactive data transmission trigger condition before the first timer expires, the terminal device re-initiates the inactive data transmission process.

If, before the first timer times out, the target cell does not meet the triggering condition for the inactive data transmission, it is determined not to re-initiate the process of the inactive data transmission; or

If at the first moment in the running period of the first timer, the target cell does not meet the inactive data transmission trigger condition, determine not to re-initiate the inactive data transmission process, and stop the first timer.

When the target cell is reselected, the first timer is started.

Trigger the RRC connection recovery process without re-initiating the inactive data transmission process; or

The idle state is entered without re-initiating the process of data transmission in the inactive state.

Optionally, in some embodiments, the target cell satisfying the inactive data transmission triggering condition includes:

the target cell supports resources for inactive data transmission;

The data to be transmitted of the terminal device is less than or equal to the maximum data amount threshold that can be transmitted by the target cell;

The packet data convergence protocol PDCP layer of the terminal device reserves data to be transmitted.

Optionally, in some embodiments, the resources used for inactive data transmission include random access RACH resources and/or semi-static resources.

Optionally, in some embodiments, the data to be transmitted includes a PDCP service data unit SDU.

Terminate the process of data transmission in the inactive state.

Optionally, in some embodiments, the process of terminating the inactive data transmission includes at least one of the following:

The terminal device terminates the RRC connection recovery timer, wherein the RRC connection recovery timer starts when the terminal device initiates an RRC connection recovery establishment request message, and stops when receiving an RRC message replied by the network device;

Suspend all SRBs and data radio bearers DRB except signaling radio bearer SRB0;

Perform PDCP suspend operations for all DRBs;

remain inactive.

Optionally, in some embodiments, the above-mentioned communication module may be a communication interface or a transceiver, or an input/output interface of a communication chip or a system-on-chip. The above determination module may be one or more processors.

It should be understood that the terminal device 400 according to the embodiment of the present application may correspond to the terminal device in the method embodiment of the present application, and the above-mentioned and other operations and/or functions of the various units in the terminal device 400 are respectively for realizing the method shown in FIG. 7 . The corresponding process of the terminal device in 200 is not repeated here for brevity.

FIG. 10 shows a schematic block diagram of a terminal device 500 according to an embodiment of the present application. As shown in Figure 10, the terminal device 500 includes:

The processing unit 510 is configured to continue to perform the process of data transmission in the inactive state, and delay the reselection to the target cell.

Optionally, in some embodiments, the processing unit 510 is further configured to:

Before continuing to perform the process of data transmission in the inactive state, start a second timer;

During the running of the second timer, the process of data transmission in the inactive state is continued, and reselection to the target cell is delayed.

If the inactive data transmission is successfully performed before the second timer expires, stop the second timer and start performing cell reselection; or

If the data transmission in the inactive state is unsuccessful before the second timer expires, the process of data transmission in the inactive state is terminated, cell reselection is started, and the terminal device is switched to the idle state.

If the inactive data transmission is not successfully performed before the second timer expires, after reselection to the target cell, it is determined whether to re-select the target cell according to whether the target cell satisfies the inactive data transmission trigger condition. The process of initiating the data transmission in the inactive state.

If the target cell satisfies the inactive data transmission trigger condition, re-initiate the inactive data transmission process; or

If the target cell does not meet the inactive data transmission trigger condition, the process of inactive data transmission is not re-initiated.

The process of determining whether to re-initiate the inactive data transmission according to whether the target cell satisfies the inactive data transmission trigger condition during the running of the first timer.

If the target cell satisfies the inactive data transmission trigger condition before the first timer expires, re-initiate the inactive data transmission process, and stop the first timer; or

If the target cell does not meet the inactive data transmission trigger condition until the first timer expires, the process of inactive data transmission is not re-initialized; or

If at the first moment in the running period of the first timer, the target cell does not meet the trigger condition for inactive data transmission, the process of inactive data transmission is not re-initialized, and the first timing is stopped device.

The first timer is started when the terminal device reselects to the target cell.

Optionally, the target cell satisfies the inactive data transmission triggering condition, including:

the target cell supports resources for inactive data transmission;

It should be understood that the terminal device 500 according to the embodiment of the present application may correspond to the terminal device in the method embodiment of the present application, and the above-mentioned and other operations and/or functions of each unit in the terminal device 500 are respectively for realizing the method shown in FIG. 8 . The corresponding process of the terminal device in 300 is not repeated here for brevity.

FIG. 11 is a schematic structural diagram of a communication device 600 provided by an embodiment of the present application. The communication device 600 shown in FIG. 11 includes a processor 610, and the processor 610 can call and run a computer program from a memory, so as to implement the method in the embodiment of the present application.

Optionally, as shown in FIG. 11 , the communication device 600 may further include a memory 620 . The processor 610 may call and run a computer program from the memory 620 to implement the methods in the embodiments of the present application.

The memory 620 may be a separate device independent of the processor 610 , or may be integrated in the processor 610 .

Optionally, as shown in FIG. 11 , the communication device 600 may further include a transceiver 630, and the processor 610 may control the transceiver 630 to communicate with other devices, specifically, may send information or data to other devices, or receive other devices Information or data sent by a device.

Among them, the transceiver 630 may include a transmitter and a receiver. The transceiver 630 may further include antennas, and the number of the antennas may be one or more.

Optionally, the communication device 600 may specifically be the network device in this embodiment of the present application, and the communication device 600 may implement the corresponding processes implemented by the network device in each method in the embodiment of the present application. For the sake of brevity, details are not repeated here. .

Optionally, the communication device 600 may specifically be the mobile terminal/terminal device of the embodiments of the present application, and the communication device 600 may implement the corresponding processes implemented by the mobile terminal/terminal device in each method of the embodiments of the present application, for the sake of brevity. , and will not be repeated here.

FIG. 12 is a schematic structural diagram of a chip according to an embodiment of the present application. The chip 700 shown in FIG. 12 includes a processor 710, and the processor 710 can call and run a computer program from a memory, so as to implement the method in this embodiment of the present application.

Optionally, as shown in FIG. 12 , the chip 700 may further include a memory 720 . The processor 710 may call and run a computer program from the memory 720 to implement the methods in the embodiments of the present application.

The memory 720 may be a separate device independent of the processor 710 , or may be integrated in the processor 710 .

Optionally, the chip 700 may further include an input interface 730 . The processor 710 may control the input interface 730 to communicate with other devices or chips, and specifically, may acquire information or data sent by other devices or chips.

Optionally, the chip 700 may further include an output interface 740 . The processor 710 can control the output interface 740 to communicate with other devices or chips, and specifically, can output information or data to other devices or chips.

Optionally, the chip can be applied to the network device in the embodiment of the present application, and the chip can implement the corresponding processes implemented by the network device in each method of the embodiment of the present application, which is not repeated here for brevity.

Optionally, the chip can be applied to the mobile terminal/terminal device in the embodiments of the present application, and the chip can implement the corresponding processes implemented by the mobile terminal/terminal device in each method of the embodiments of the present application. For brevity, here No longer.

It should be understood that the chip mentioned in the embodiments of the present application may also be referred to as a system-on-chip, a system-on-chip, a system-on-chip, or a system-on-a-chip, or the like.

It should be understood that the processor in this embodiment of the present application may be an integrated circuit chip, which has a signal processing capability. In the implementation process, each step of the above method embodiments may be completed by a hardware integrated logic circuit in a processor or an instruction in the form of software. The above-mentioned processor can be a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), an off-the-shelf programmable gate array (Field Programmable Gate Array, FPGA) or other available Programming logic devices, discrete gate or transistor logic devices, discrete hardware components. The methods, steps, and logic block diagrams disclosed in the embodiments of this application can be implemented or executed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in conjunction with the embodiments of the present application may be directly embodied as executed by a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor. The software module may be located in random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers and other storage media mature in the art. The storage medium is located in the memory, and the processor reads the information in the memory, and completes the steps of the above method in combination with its hardware.

It can be understood that the memory in this embodiment of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory. Wherein, the non-volatile memory may be a read-only memory (Read-Only Memory, ROM), a programmable read-only memory (Programmable ROM, PROM), an erasable programmable read-only memory (Erasable PROM, EPROM), an electrically programmable read-only memory (Erasable PROM, EPROM). Erase programmable read-only memory (Electrically EPROM, EEPROM) or flash memory. Volatile memory may be Random Access Memory (RAM), which acts as an external cache. By way of illustration and not limitation, many forms of RAM are available, such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (Double Data Rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (Enhanced SDRAM, ESDRAM), synchronous link dynamic random access memory (Synchlink DRAM, SLDRAM) ) and direct memory bus random access memory (Direct Rambus RAM, DR RAM). It should be noted that the memory of the systems and methods described herein is intended to include, but not be limited to, these and any other suitable types of memory.

It should be understood that the above memory is an example but not a limitative description, for example, the memory in the embodiment of the present application may also be a static random access memory (static RAM, SRAM), a dynamic random access memory (dynamic RAM, DRAM), Synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection Dynamic random access memory (synch link DRAM, SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DR RAM) and so on. That is, the memory in the embodiments of the present application is intended to include but not limited to these and any other suitable types of memory.

Embodiments of the present application further provide a computer-readable storage medium for storing a computer program.

Optionally, the computer-readable storage medium can be applied to the network device in the embodiments of the present application, and the computer program enables the computer to execute the corresponding processes implemented by the network device in the various methods of the embodiments of the present application. For brevity, here No longer.

Optionally, the computer-readable storage medium can be applied to the mobile terminal/terminal device in the embodiments of the present application, and the computer program enables the computer to execute the corresponding processes implemented by the mobile terminal/terminal device in each method of the embodiments of the present application. , and are not repeated here for brevity.

Embodiments of the present application also provide a computer program product, including computer program instructions.

Optionally, the computer program product can be applied to the network device in the embodiments of the present application, and the computer program instructions cause the computer to execute the corresponding processes implemented by the network device in each method of the embodiments of the present application. Repeat.

Optionally, the computer program product can be applied to the mobile terminal/terminal device in the embodiments of the present application, and the computer program instructions cause the computer to execute the corresponding processes implemented by the mobile terminal/terminal device in each method of the embodiments of the present application, For brevity, details are not repeated here.

The embodiments of the present application also provide a computer program.

Optionally, the computer program can be applied to the network device in the embodiments of the present application. When the computer program is run on the computer, it causes the computer to execute the corresponding processes implemented by the network device in each method of the embodiments of the present application. For the sake of brevity. , and will not be repeated here.

Optionally, the computer program may be applied to the mobile terminal/terminal device in the embodiments of the present application, and when the computer program is run on the computer, the mobile terminal/terminal device implements the various methods of the computer program in the embodiments of the present application. The corresponding process, for the sake of brevity, will not be repeated here.

Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each particular application, but such implementations should not be considered beyond the scope of this application.

Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the above-described systems, devices and units may refer to the corresponding processes in the foregoing method embodiments, which will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the apparatus embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented. On the other hand, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.

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

The functions, if implemented in the form of software functional units and sold or used as independent products, may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application can be embodied in the form of a software product in essence, or the part that contributes to the prior art or the part of the technical solution. The computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory,) ROM, random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program codes .

The above are only specific embodiments of the present application, but the protection scope of the present application is not limited to this. should be covered within the scope of protection of this application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

A method for data transmission, comprising:

In the process that the terminal device performs data transmission in the inactive state, if the signal quality of the target cell satisfies the cell reselection criterion, the terminal device reselects to the target cell;

The terminal device re-initiates the process of data transmission in the inactive state when the target cell satisfies the triggering condition for data transmission in the inactive state.
The method according to claim 1, wherein the method further comprises:

In the case that the target cell does not meet the triggering condition for data transmission in the inactive state, the terminal device does not re-initiate the process of data transmission in the inactive state.
The method according to claim 1, wherein, when the target cell satisfies a trigger condition for data transmission in an inactive state, the terminal device re-initiates the process of data transmission in an inactive state, comprising:

If the target cell satisfies the inactive data transmission triggering condition before the first timer expires, the terminal device re-initiates the inactive data transmission process.
The method according to claim 3, wherein the method further comprises:

If the target cell does not meet the trigger condition for inactive data transmission before the first timer expires, the terminal device does not re-initiate the process of inactive data transmission; or

If at the first moment in the running period of the first timer, the target cell does not meet the inactive data transmission trigger condition, the terminal device does not re-initiate the inactive data transmission process, and Stop the first timer.
The method according to claim 3 or 4, wherein the method further comprises:

The first timer is started when the terminal device reselects to the target cell.
The method according to any one of claims 1-5, wherein the method further comprises:

In the case of not re-initiating the process of data transmission in the inactive state, the terminal device triggers the RRC connection recovery process; or

The terminal device enters an idle state without re-initiating the process of data transmission in the inactive state.
The method according to any one of claims 1 to 6, wherein the target cell satisfying the trigger condition for data transmission in the inactive state comprises:

the target cell supports resources for inactive data transmission;

The data to be transmitted of the terminal device is less than or equal to the maximum data amount threshold that can be transmitted by the target cell;

The packet data convergence protocol PDCP layer of the terminal device reserves data to be transmitted.
The method according to claim 7, wherein the resources used for inactive data transmission include random access RACH resources and/or semi-static resources.
The method according to claim 7 or 8, wherein the data to be transmitted comprises a PDCP service data unit SDU.
The method according to any one of claims 1-9, wherein before the terminal device reselection to the target cell, the method further comprises:

The terminal device terminates the process of data transmission in the inactive state.
The method according to claim 10, wherein the process of terminating the data transmission in the inactive state by the terminal device comprises at least one of the following:

The terminal device terminates the RRC connection recovery timer, wherein the RRC connection recovery timer starts when the terminal device initiates an RRC connection recovery establishment request message, and stops when receiving an RRC message replied by the network device;

Suspend all SRBs and data radio bearers DRB except signaling radio bearer SRB0;

Perform PDCP suspend operations for all DRBs;

remain inactive.
A method for data transmission, comprising:

During the inactive data transmission process by the terminal device, if the signal quality of the target cell satisfies the cell reselection criterion, the terminal device continues to perform the inactive data transmission process, and delays reselection to the target cell .
The method according to claim 12, wherein before the terminal device continues to perform the process of data transmission in the inactive state, the method further comprises:

the terminal device starts a second timer;

The terminal equipment continues to perform the process of data transmission in the inactive state, and delays reselection to the target cell, including:

During the running of the second timer, the process of data transmission in the inactive state is continued, and reselection to the target cell is delayed.
The method of claim 13, wherein the method further comprises:

If the inactive data transmission is successfully performed before the second timer expires, the terminal device stops the second timer and starts to perform cell reselection; or

If the inactive data transmission is not successfully performed before the second timer expires, the terminal device terminates the inactive data transmission process, starts to perform cell reselection, and switches the terminal device to idle state.
The method according to any one of claims 12-14, wherein the method further comprises:

If the inactive data transmission is not successfully performed before the second timer expires, after reselecting to the target cell, the terminal device determines whether the target cell satisfies the inactive data transmission trigger condition , and determine whether to re-initiate the process of data transmission in the inactive state.
The method according to claim 15, wherein the terminal device determines whether to re-initiate the inactive data transmission process according to whether the target cell satisfies the inactive data transmission trigger condition, comprising:

If the target cell satisfies the inactive data transmission trigger condition, determine the process of re-initiating the inactive data transmission; or

If the target cell does not meet the trigger condition for data transmission in the inactive state, it is determined not to re-initiate the process of data transmission in the inactive state.
The method according to claim 15, wherein the terminal device determines whether to re-initiate the inactive data transmission process according to whether the target cell satisfies the inactive data transmission trigger condition, comprising:

The terminal device determines, according to whether the target cell satisfies the trigger condition for the inactive data transmission during the running of the first timer, whether to re-initiate the process of the inactive data transmission.
The method according to claim 17, wherein the terminal device determines whether to re-send the inactive data according to whether the target cell satisfies the inactive data transmission trigger condition during the running of the first timer The transfer process, including:

If the target cell satisfies the trigger condition for inactive data transmission before the first timer expires, determine the process of re-initiating the inactive data transmission, and stop the first timer; or

If, before the first timer expires, the target cell does not meet the trigger condition for inactive data transmission, determine not to re-initiate the process of inactive data transmission; or

If at the first moment in the running period of the first timer, the target cell does not meet the inactive data transmission trigger condition, determine not to re-initiate the inactive data transmission process, and stop the first timer.
The method according to claim 17 or 18, wherein the method further comprises:

The first timer is started when the terminal device reselects to the target cell.
The method according to any one of claims 15-19, wherein the method further comprises:

In the case that it is determined not to re-initiate the process of data transmission in the inactive state, the terminal device triggers a radio resource control RRC connection recovery process; or

If it is determined not to re-initiate the process of data transmission in the inactive state, the terminal device enters an idle state.
The method according to claim 16 or 18, wherein the target cell satisfies the trigger condition for data transmission in the inactive state, comprising:

the target cell supports resources for inactive data transmission;

The data to be transmitted of the terminal device is less than or equal to the maximum data amount threshold that can be transmitted by the target cell;

The packet data convergence protocol PDCP layer of the terminal device reserves data to be transmitted.
The method according to claim 21, wherein the resources used for inactive data transmission include random access RACH resources and/or semi-static resources.
The method according to claim 21 or 22, wherein the data to be transmitted comprises a PDCP service data unit SDU.
A terminal device, characterized in that it includes:

a processing unit, configured to reselect to the target cell if the signal quality of the target cell satisfies the cell reselection criterion during the inactive data transmission process;

In the case that the target cell satisfies the inactive data transmission trigger condition, re-initiate the inactive data transmission process.
The terminal device according to claim 24, wherein the processing unit is further configured to:

In the case that the target cell does not meet the triggering condition for the inactive data transmission, the process of the inactive data transmission is not re-initialized.
The terminal device according to claim 24, wherein the processing unit is further configured to:

If the target cell satisfies the inactive data transmission trigger condition before the first timer expires, the terminal device re-initiates the inactive data transmission process.
The terminal device according to claim 26, wherein the processing unit is further configured to:

If the target cell does not meet the trigger condition for inactive data transmission before the first timer expires, do not re-initiate the process of inactive data transmission; or

If at the first moment in the running period of the first timer, the target cell does not meet the inactive data transmission trigger condition, the process of inactive data transmission is not re-initialized, and the first a timer.
The terminal device according to claim 26 or 27, wherein the processing unit is further configured to:

When the target cell is reselected, the first timer is started.
The terminal device according to any one of claims 24-28, wherein the processing unit is further configured to:

Trigger the RRC connection recovery process without re-initiating the inactive data transmission process; or

The idle state is entered without re-initiating the process of data transmission in the inactive state.
The terminal device according to any one of claims 24-29, wherein the target cell satisfies the inactive data transmission trigger condition:

the target cell supports resources for inactive data transmission;

The data to be transmitted of the terminal device is less than or equal to the maximum data amount threshold that can be transmitted by the target cell;

The packet data convergence protocol PDCP layer of the terminal device reserves data to be transmitted.
The terminal device according to claim 30, wherein the resources used for inactive data transmission include random access RACH resources and/or semi-static resources.
The terminal device according to claim 30 or 31, wherein the data to be transmitted comprises a PDCP service data unit SDU.
The terminal device according to any one of claims 24-32, wherein the processing unit is further configured to:

Terminate the process of data transmission in the inactive state.
The terminal device according to claim 33, wherein the process of terminating the inactive data transmission includes at least one of the following:

Terminate the RRC connection recovery timer, wherein the RRC connection recovery timer starts when the terminal device initiates an RRC connection recovery establishment request message, and stops when receiving the RRC message replied by the network device;

Suspend all SRBs and data radio bearers DRB except signaling radio bearer SRB0;

Perform PDCP suspend operations for all DRBs;

remain inactive.
A terminal device, characterized in that it includes:

The processing unit is configured to continue to perform the process of data transmission in the inactive state and delay reselection to the target cell if the signal quality of the target cell satisfies the cell reselection criterion during the inactive data transmission process.
The terminal device according to claim 35, wherein the processing unit is further configured to:

Before continuing to perform the process of data transmission in the inactive state, start a second timer;

During the running of the second timer, the process of data transmission in the inactive state is continued, and reselection to the target cell is delayed.
The terminal device according to claim 36, wherein the processing unit is specifically configured to:

If the inactive data transmission is successfully performed before the second timer expires, stop the second timer and start performing cell reselection; or

If the data transmission in the inactive state is unsuccessful before the second timer expires, the process of data transmission in the inactive state is terminated, cell reselection is started, and the terminal device is switched to the idle state.
The terminal device according to any one of claims 35-37, wherein the processing unit is further configured to:

If the inactive data transmission is not successfully performed before the second timer expires, after reselection to the target cell, it is determined whether to re-select the target cell according to whether the target cell satisfies the inactive data transmission trigger condition. The process of initiating the data transmission in the inactive state.
The terminal device according to claim 38, wherein the processing unit is further configured to:

If the target cell satisfies the inactive data transmission trigger condition, determine the process of re-initiating the inactive data transmission; or

If the target cell does not meet the inactive data transmission trigger condition, it is determined not to re-initiate the inactive data transmission process.
The terminal device according to claim 38, wherein the processing unit is further configured to:

The process of determining whether to re-initiate the inactive data transmission according to whether the target cell satisfies the inactive data transmission trigger condition during the running of the first timer.
The terminal device according to claim 40, wherein the processing unit is further configured to:

If before the first timer times out, the target cell satisfies the inactive data transmission trigger condition, determine the process of re-initiating the inactive data transmission, and stop the first timer; or

If, before the first timer expires, the target cell does not meet the trigger condition for inactive data transmission, determine not to re-initiate the process of inactive data transmission; or

If at the first moment in the running period of the first timer, the target cell does not meet the inactive data transmission trigger condition, determine not to re-initiate the inactive data transmission process, and stop the first timer.
The terminal device according to claim 40 or 41, wherein the processing unit is further configured to:

The first timer is started when the terminal device reselects to the target cell.
The terminal device according to any one of claims 38-42, wherein the processing unit is further configured to:

In the case of determining not to re-initiate the process of data transmission in the inactive state, trigger the RRC connection recovery process; or

In the case of determining not to re-initiate the process of data transmission in the inactive state, enter the idle state.
The terminal device according to claim 39 or 41, wherein the target cell satisfies the trigger condition for data transmission in the inactive state comprising:

the target cell supports resources for inactive data transmission;

The data to be transmitted of the terminal device is less than or equal to the maximum data amount threshold that can be transmitted by the target cell;

The packet data convergence protocol PDCP layer of the terminal device reserves data to be transmitted.
The terminal device according to claim 44, wherein the resources used for inactive data transmission include random access RACH resources and/or semi-static resources.
The terminal device according to claim 44 or 45, wherein the data to be transmitted comprises a PDCP service data unit SDU.
A terminal device, characterized in that it comprises: a processor and a memory, the memory is used to store a computer program, the processor is used to call and run the computer program stored in the memory, and execute any one of claims 1 to 11. one of the methods described.
A chip, characterized by comprising: a processor for calling and running a computer program from a memory, so that a device installed with the chip executes the method according to any one of claims 1 to 11.
A computer-readable storage medium, characterized by being used for storing a computer program, the computer program causing a computer to execute the method according to any one of claims 1 to 11.
A computer program product comprising computer program instructions, the computer program instructions causing a computer to perform the method of any one of claims 1 to 11.
A computer program, characterized in that the computer program causes a computer to perform the method according to any one of claims 1 to 11.
A terminal device, characterized in that it includes: a processor and a memory, the memory is used to store a computer program, the processor is used to call and run the computer program stored in the memory, and execute any one of claims 12 to 23. one of the methods described.
A chip, characterized by comprising: a processor for invoking and running a computer program from a memory, so that a device installed with the chip executes the method according to any one of claims 12 to 23.
A computer-readable storage medium, characterized by being used for storing a computer program, the computer program causing a computer to execute the method according to any one of claims 12 to 23.
A computer program product comprising computer program instructions, the computer program instructions causing a computer to perform the method of any one of claims 12 to 23.
A computer program, characterized in that the computer program causes a computer to perform the method according to any one of claims 12 to 23.