Method, terminal device and network device for transmitting data

Abstract

A method, a terminal device and a network device for transmitting data are provided. The method comprises: if the terminal device receives an SDT indication sent by the network device, and the terminal device receives a first request, the terminal device determines whether to trigger a target process; wherein the target process includes an SDT process or an RRC connection recovery process, and the first request is used to request the access layer of the terminal device to restore the RRC connection. If the terminal device receives both the SDT indication triggered by the network device and the first request (i.e., there is uplink data / signaling arrival), the terminal device can determine whether to trigger the SDT process or whether to trigger the RRC recovery process. In some cases, the terminal device can determine to trigger the SDT process to avoid unnecessary power consumption and signaling overhead; in some cases, the terminal device can determine to trigger the RRC recovery process to meet data transmission requirements.

Description

Method, terminal device and network device for transmitting data Technical Field

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

[0002] In some communication protocols, terminal devices in the radio resource control (RRC) inactive state do not support data transmission. When uplink or downlink data arrives, the terminal device needs to restore the RRC connection state. After the data transmission is completed, the terminal device can be released to the RRC inactive state. For terminal devices with small data volume and low transmission frequency, such a transmission mechanism will lead to unnecessary power consumption and signaling overhead. Based on this, some communication protocols have introduced small data transmission (SDT) technology to support terminal devices to transmit small amounts of data in the RRC inactive state. Upon receiving an SDT indication sent by a network device, the terminal device may trigger the SDT process. Alternatively, upon the arrival of uplink data / signaling, the terminal device may trigger the SDT process.

[0003] Summary of the Invention

[0004] The present application provides a method, terminal device, and network device for transmitting data. The following introduces various aspects of the present application.

[0005] In a first aspect, a method for transmitting data is provided. The method includes: if a terminal device receives an SDT indication sent by a network device and the terminal device receives a first request, the terminal device determines whether to trigger a target process; wherein the target process includes an SDT process or an RRC connection recovery process, and the first request is used to request an access layer of the terminal device to restore the RRC connection.

[0006] In a second aspect, a method for transmitting data is provided. The method includes: if a first trigger condition and a second trigger condition are satisfied, a network device receives, from a terminal device, first indication information; wherein the first trigger condition corresponds to a first SDT process triggered by the terminal device, the second trigger condition corresponds to a second SDT process triggered by the network device, and the first indication information indicates that the triggering reason for the SDT process is that both the first trigger condition and the second trigger condition are satisfied.

[0007] In a third aspect, a terminal device is provided. The terminal device includes: a determination unit configured to determine whether to trigger a target process if the terminal device receives a small data transmission (SDT) indication sent by a network device and the terminal device receives a first request; wherein the target process includes an SDT process or a radio resource control (RRC) connection recovery process, and the first request is used to request an access layer of the terminal device to restore the RRC connection.

[0008] In a fourth aspect, a network device is provided. The network device includes: a second receiving unit, configured to receive first indication information sent by a terminal device if a first trigger condition and a second trigger condition are met; wherein the first trigger condition corresponds to a first SDT process triggered by the terminal device, the second trigger condition corresponds to a second SDT process triggered by the network device, and the first indication information is used to indicate that the triggering cause of the SDT process is that both the first trigger condition and the second trigger condition are met.

[0009] In a fifth aspect, a terminal device is provided, comprising a processor, a memory, and a communication interface, wherein the memory is used to store one or more computer programs, and the processor is used to call the computer program in the memory so that the terminal device executes part or all of the steps in the method of the first aspect.

[0010] In a sixth aspect, a network device is provided, comprising a processor, a memory, and a transceiver, wherein the memory is used to store one or more computer programs, and the processor is used to call the computer program in the memory so that the network device executes part or all of the steps in the method of the second aspect.

[0011] In a seventh aspect, an embodiment of the present application provides a communication system, which includes the above-mentioned terminal device and / or network device. In another possible design, the system may also include other devices that interact with the terminal device or network device in the solution provided in the embodiment of the present application.

[0012] In an eighth aspect, an embodiment of the present application provides a computer-readable storage medium, which stores a computer program, and the computer program enables a communication device (for example, a terminal device or a network device) to execute part or all of the steps in the methods of the above aspects.

[0013] In a ninth aspect, embodiments of the present application provide a computer program product, wherein the computer program product includes a non-transitory computer-readable storage medium storing a computer program, wherein the computer program is operable to cause a communication device (e.g., a terminal device or a network device) to perform some or all of the steps of the methods described in each of the above aspects. In some implementations, the computer program product can be a software installation package.

[0014] In the tenth aspect, an embodiment of the present application provides a chip, which includes a memory and a processor. The processor can call and run a computer program from the memory to implement some or all of the steps described in the methods of the above aspects.

[0015] If the terminal device receives both an SDT indication triggered by the network device and a first request (i.e., uplink data / signaling arrives), the terminal device may determine whether to trigger the SDT process or whether to trigger the RRC recovery process. In some cases, the terminal device may determine to trigger the SDT process to avoid unnecessary power consumption and signaling overhead; in some cases, the terminal device may determine to trigger the RRC recovery process to meet data transmission requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] FIG1 is a wireless communication system used in an embodiment of the present application.

[0017] FIG2 is a flowchart illustrating an MO-EDT process.

[0018] FIG3 is a flowchart illustrating an MT-EDT process.

[0019] FIG4 is a schematic flowchart of a method for transmitting data provided in an embodiment of the present application.

[0020] FIG5 is a schematic structural diagram of a terminal device provided in an embodiment of the present application.

[0021] FIG6 is a schematic structural diagram of a network device provided in an embodiment of the present application.

[0022] FIG7 is a schematic structural diagram of a device for communication provided in an embodiment of the present application. DETAILED DESCRIPTION

[0023] The technical solution in this application will be described below with reference to the accompanying drawings.

[0024] Communication System

[0025] Figure 1 illustrates a wireless communication system 100 used in an embodiment of the present application. The wireless communication system 100 may include a network device 110 and a terminal device 120. The network device 110 may be a device that communicates with the terminal device 120. The network device 110 may provide communication coverage for a specific geographic area and may communicate with the terminal device 120 within the coverage area.

[0026] FIG1 exemplarily shows a network device and two terminals. Optionally, the wireless communication system 100 may include multiple network devices and each network device may include other numbers of terminal devices within its coverage area, which is not limited in the embodiments of the present application.

[0027] Optionally, the wireless communication system 100 may further include other network entities such as a network controller and a mobility management entity, which is not limited in the embodiment of the present application.

[0028] It should be understood that the technical solutions of the embodiments of the present application can be applied to various communication systems, such as: fifth generation (5G) system or new radio (NR), long term evolution (LTE) system, LTE frequency division duplex (FDD) system, LTE time division duplex (TDD), etc. The technical solutions provided in this application can also be applied to future communication systems, such as the sixth generation mobile communication system, satellite communication system, etc.

[0029] The terminal device in the embodiments of the present application may also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station (MS), mobile terminal (MT), remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device. The terminal device in the embodiments of the present application may refer to a device that provides voice and / or data connectivity to a user and can be used to connect people, objects and machines, such as a handheld device with wireless connection function, a vehicle-mounted device, etc. The terminal device in the embodiments of the present application can be a mobile phone, a tablet computer, a laptop computer, a PDA, a mobile internet device (MID), a wearable device, a virtual reality (VR) device, an augmented reality (AR) device, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical surgery, a wireless terminal in a smart grid, a wireless terminal in transportation safety, a wireless terminal in a smart city, a wireless terminal in a smart home, etc. Optionally, the UE can be used to act as a base station. For example, the UE can act as a scheduling entity that provides sidelink signals between UEs in V2X or D2D, etc. For example, a cellular phone and a car communicate with each other using sidelink signals. The cellular phone and smart home devices communicate without relaying the communication signal through the base station.

[0030] The network device in the embodiments of the present application may be a device for communicating with a terminal device, and may also be referred to as an access network device or a radio access network device. For example, the network device may be a base station. The network device in the embodiments of the present application may refer to a radio access network (RAN) node (or device) that connects a terminal device to a wireless network. A base station can broadly cover various names as follows, or be replaced with the following names, such as: NodeB, evolved NodeB (eNB), next generation NodeB (gNB), relay station, access point, transmission point (TRP), transmission point (TP), master station MeNB, secondary station SeNB, multi-standard radio (MSR) node, home base station, network controller, access node, wireless node, access point (AP), transmission node, transceiver node, baseband unit (BBU), remote radio unit (RRU), active antenna unit (AAU), remote radio head (RRH), central unit (CU), distributed unit (DU), positioning node, etc. A base station can be a macro base station, a micro base station, a relay node, a donor node or the like, or a combination thereof. A base station can also refer to a communication module, a modem or a chip used to be set in the aforementioned device or apparatus. The base station can also be a mobile switching center and a device that performs base station functions in device-to-device D2D, vehicle-to-everything (V2X), and machine-to-machine (M2M) communications, a network-side device in a 6G network, or a device that performs base station functions in future communication systems. The base station can support networks with the same or different access technologies. The embodiments of this application do not limit the specific technology and specific device form used by the network equipment.

[0031] Base stations can be fixed or mobile. For example, a helicopter or drone can be configured to act as a mobile base station, and one or more cells can move based on the location of the mobile base station. In other examples, a helicopter or drone can be configured to act as a device that communicates with another base station.

[0032] In some deployments, the network device in the embodiments of the present application may refer to a CU or a DU, or the network device may include a CU and a DU. The gNB may also include an AAU.

[0033] The network equipment and terminal devices can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on water; they can also be deployed in the air on aircraft, balloons, and satellites. The embodiments of this application do not limit the scenarios in which the network equipment and terminal devices are located.

[0034] It should be understood that all or part of the functions of the communication device in this application can also be implemented through software functions running on hardware, or through virtualization functions instantiated on a platform (such as a cloud platform).

[0035] Early data transmission (EDT) technology

[0036] In some communication systems (such as LTE systems), EDT technology has been introduced. EDT technology can realize small data transmission. During the EDT process, the terminal device can remain in an idle state, a suspended state, or an inactive state, and complete the transmission of small uplink and / or downlink data packets. EDT can be divided into mobile originated early data transmission (MO-EDT) and mobile terminated early data transmission (MT-EDT). The difference between MO-EDT and MT-EDT is that the communication devices that trigger EDT are different.

[0037] MO-EDT is an EDT process initiated by the terminal device. The system broadcast message sent by the network device may include the maximum transport block size (transport block size, TB size) allowed for transmission by MO-EDT. The terminal device can determine the amount of data to be transmitted. If the amount of data to be transmitted by the terminal device is less than the maximum transport block size broadcast above, the terminal device can initiate an EDT process, namely, the MO-EDT process. If the amount of data to be transmitted by the terminal device is greater than or equal to the maximum transport block size broadcast above, the terminal device can initiate a normal connection establishment process, namely, the terminal device can enter the connection state to transmit data.

[0038] The MO-EDT process can be implemented based on the random access process. The MO-EDT process is described below using Figure 2 as an example. Figure 2 is an example diagram of the MO-EDT air interface transmission process. The process shown in Figure 2 may include steps S201, S202, S210, and S280.

[0039] In step S201, the terminal device sends a random access preamble to the network device to trigger the MO-EDT process.

[0040] The network device may allocate random access resources dedicated to MO-EDT to the terminal device to distinguish whether the current random access process is triggered by MO-EDT.

[0041] Step S202: The terminal device receives a random access response (RAR) sent by the network device.

[0042] The RAR may include an uplink grant (UL grant). The terminal device may use the obtained uplink grant to transmit uplink data. If the current random access procedure is triggered by MO-EDT, the network device may allocate a larger uplink grant through the RAR for uplink data transmission.

[0043] In step S210, the terminal device sends an RRC connection resume request, uplink data, and an access stratum routing area identifier (AS RAI). The RRC connection resume request may include one or more of the inactive radio network temporary identifier (I-RNTI), resume cause (resumeCause), and shortResumeMAC-I fields.

[0044] In step S280, the network device sends an RRC connection release message and downlink data to the terminal device. The RRC connection release message may include one or more of the release cause (releaseCause), I-RNTI, and network call controller (NCC) fields. In some embodiments, the RRC connection release message may also be referred to as a radio resource release message.

[0045] The MT-EDT process is initiated by a network device. Specifically, the network device that initiates the MT-EDT process may be a Mobility Management Entity (MME). The MT-EDT process is illustrated below using Figure 3 as an example. Figure 3 is a flowchart illustrating the MT-EDT process.

[0046] In step S310, when downlink data for a certain terminal device reaches a serving gateway (S-GW), the S-GW may inform the MME of downlink data size information.

[0047] In step S320, the MME instructs the base station (eNB) to initiate paging. The MME may instruct the base station to initiate paging via S1-AP. In step S320, the MME may also send downlink data volume information to the base station.

[0048] In step S330, the base station initiates paging, that is, sends a paging message to find the target terminal device.

[0049] The paging message may include the MT-EDT indication and the identifier of the terminal device corresponding to the MT-EDT. Upon receiving the paging message, the target terminal device may confirm whether the paging message contains the corresponding terminal device identifier and the MT-EDT indication. If so, the terminal device may initiate the MO-EDT process within the MT-EDT process.

[0050] In step S340 , the terminal device and the network device execute a MO-EDT procedure for User Plane CIoT EPS Optimization.

[0051] It can be seen that during the MT-EDT process, the terminal device can also initiate the MO-EDT process, which is different from the normal MO-EDT process. The MO-EDT process initiated during the MT-EDT process meets one or more of the following conditions: the terminal device uses the legacy random access channel (RACH) resources to initiate random access, that is, the terminal device does not use the random access resources dedicated to MO-EDT used in the normal MO-EDT process; the resume cause is set to mt-EDT to inform the network device of the purpose or reason for the current initiation of the connection establishment; the network device side can further determine whether to instruct the terminal device to enter the connection state through the pending data indication sent by the core network, wherein the pending data indication is used to indicate whether the network device has further downlink data transmission requirements.

[0052] It should be noted that during the EDT process, only one uplink / downlink data transmission can be supported.

[0053] Small data transmission (SDT) technology

[0054] In some communication systems (such as 5G systems), RRC states can be divided into three types: RRC idle state (RRC_IDLE), RRC inactive state (RRC_INACTIVE) and RRC connected state (RRC_CONNECTED). Among them, the RRC inactive state is a state introduced by these communication systems for energy saving considerations. For terminal devices in the RRC inactive state, the radio bearer and all radio resources will be released, but the terminal device and the network device side will retain the access context of the terminal device to quickly restore the RRC connection. Network equipment can usually keep terminal devices with infrequent data transmission in the RRC inactive state.

[0055] In some communication protocols (such as protocols before R16), terminal devices in the RRC inactive state do not support data transmission. When uplink or downlink data arrives, the terminal device needs to restore the RRC connected state. After the data transmission is completed, the terminal device can be released to the RRC inactive state. For terminal devices with small data volumes and low transmission frequency, such a transmission mechanism will result in unnecessary power consumption and signaling overhead. Based on this, some communication protocols (such as R17) introduced SDT technology to support terminal devices to transmit small amounts of data in the RRC inactive state.

[0056] The SDT technology is implemented with reference to the EDT technology described above. Similar to EDT, the SDT process can include a mobile originated small data transmission (MO-SDT) process or a mobile terminated small data transmission (MT-SDT) process.

[0057] The MO-SDT process is an SDT process triggered by the arrival of uplink data / signaling, that is, an SDT process initiated or triggered by the terminal device. Some communication protocols (such as R17) mainly discuss the MO-SDT process. In these protocols, the triggering conditions of the MO-SDT process include: the uplink data and / or signaling to be transmitted belongs to a radio bearer that allows triggering SDT, such as SRB, DRB; the amount of uplink data to be transmitted is less than the network pre-configured data amount threshold; the downlink RSRP measurement result is greater than the network pre-configured RSRP threshold; and there are valid SDT resources, such as random access small data transmission (RA-SDT) resources and / or configured authorized small data transmission (CG-SDT) resources. When uplink data / channel arrives, if the triggering conditions of the MO-SDT process are met, the terminal device can trigger the MO-SDT process; if the triggering conditions of the MO-SDT process are not met, the terminal device can trigger the RRC connection resumption process. Based on the RRC connection recovery process, the terminal device can be converted from the RRC inactive state to the RRC connected state, thereby performing normal data transmission.

[0058] The MT-SDT process is initiated or triggered by a network device. After the network device triggers MT-SDT, it can send an MT-SDT indication to the terminal device via a paging message. Upon receiving the MT-SDT indication, the terminal device can initiate the MT-SDT process. Therefore, MT-SDT is also called paging-triggered SDT.

[0059] Some communication protocols (such as Release 18) have the following research objectives for MT-SDT: specify the support for paging-triggered SDT (MT-SDT) [RAN2, RAN3]. For example, the research objectives for MT-SDT include: MT-SDT triggering mechanism for UEs in RRC_INACTIVE, supporting RA-SDT and CG-SDT as the UL response; and MT-SDT procedure for initial DL data reception and subsequent UL / DL data transmissions in RRC_INACTIVE.

[0060] As described above, when the terminal device receives an SDT indication sent by the network device, the terminal device may trigger the SDT process. Alternatively, when uplink data / signaling arrives, the terminal device may trigger the SDT process. The present application considers another situation related to the SDT process, in which the terminal device receives an SDT indication sent by the network device and the terminal device receives a first request.

[0061] The first request may be used to request the access stratum (AS) of the terminal device to restore the RRC connection. Upon arrival of uplink data / signaling, the upper layer of the terminal device may send the first request to request the AS to restore the RRC connection. In some embodiments, the first request may be used to indicate the arrival of uplink data / signaling. In some embodiments, the first request may be a condition for triggering an SDT process, i.e., the first request may be used to trigger the SDT process.

[0062] The SDT indication sent by the network device can be used to instruct the network device to trigger an SDT process. For ease of description, the SDT process triggered by the terminal device can be referred to as a first SDT process, and the SDT process triggered by the network device can be referred to as a second SDT process. In some embodiments, the first SDT process triggered by the terminal device can be an MO-SDT process. The second SDT process triggered by the network device can be an MT-SDT process. For example, if the second SDT process is an MT-SDT process, the SDT indication can be an MT-SDT indication.

[0063] The SDT indication sent by the network device can be carried in a paging message. In some embodiments, the paging message can be used to trigger the second SDT process. Taking the second SDT process as an MT-SDT process as an example, the paging message can be used to trigger the MT-SDT process. The paging message may include an identifier (ID) of the terminal device and an SDT indication. The identifier of the terminal device may include an I-RNTI or a 5G-S-TMSI.

[0064] The time relationship between the paging message carrying the SDT indication and the first request time can satisfy one of the following relationships: the terminal device receives the paging message and the first recovery request at the same time; the terminal device first receives the paging message and receives the first request before determining to initiate the SDT process; the terminal device first receives the first request and receives the paging message before determining to initiate the SDT process or the RRC connection recovery process.

[0065] In the above situation, the method shown in Figure 4 may be executed. The method shown in Figure 4 may include step S410. When step S410 is executed, the terminal device may be in an RRC inactive state.

[0066] Step S410: If the terminal device receives an SDT indication sent by the network device and the terminal device receives a first request, the terminal device determines whether to trigger a target process.

[0067] The target process may include an SDT process or an RRC connection recovery process. In other words, in step S410, the terminal device may determine whether to trigger the SDT process, or the terminal device may determine whether to trigger the RRC connection recovery process.

[0068] If the terminal device receives an SDT indication triggered by the network device and receives a first request (i.e., uplink data / signaling arrives), the terminal device can determine whether to trigger the SDT process or whether to trigger the RRC recovery process. In some cases, the terminal device may determine to trigger the SDT process to avoid unnecessary power consumption and signaling overhead; in some cases, the terminal device may determine to trigger the RRC recovery process to meet data transmission requirements.

[0069] In some embodiments, the target process is determined based on one or more of the following: configuration information of the network device, pre-configuration information of the terminal device, implementation of the terminal device, and triggering conditions of the SDT process.

[0070] The configuration information of the network device may include one or more of the following information: an indication of whether the terminal device is allowed to trigger the first SDT process, a radio bearer allowed to trigger the first SDT process, and a radio bearer allowed to trigger the second SDT process.

[0071] If the terminal device is not allowed to initiate the first SDT process, the target process may be: a second SDT process initiated by the network device, or an RRC connection recovery process. For example, if the second trigger condition is met, the terminal device may initiate the second SDT process. If the second trigger condition is not met, the terminal device may initiate the RRC connection recovery process.

[0072] In some embodiments, the radio bearers allowed to trigger the first SDT process and / or the radio bearers allowed to trigger the second SDT process may be carried in the first configuration information. The first configuration information may be sent by the network device, and the terminal device receives the first configuration information. The first configuration information may be used to indicate one or more of the following information: the radio bearers allowed to trigger the first SDT process are the first bearer set, and the radio bearers allowed to trigger the second SDT process are the second bearer set. It should be noted that the first bearer set and the second bearer set may be the same or different. For example, the first configuration information may be used to configure the set of radio bearers allowed to trigger the first SDT process to be set #1, and / or the set of radio bearers allowed to trigger the second SDT process to be set #2. Among them, set #1 and set #2 may be the same or different.

[0073] Whether the terminal device is allowed to trigger the first SDT process can be indicated through explicit indication and / or implicit indication.

[0074] In some embodiments, whether the terminal device is allowed to trigger the first SDT process can be determined by the second indication information. The second indication information can be sent by the network device. The second indication information can be used to explicitly indicate whether the terminal device is allowed to trigger the first SDT process when receiving the SDT indication sent by the network device. For example, in a case where the second indication information received by the terminal device indicates that the terminal device allows the triggering of the first SDT process, the terminal device can trigger the first SDT process. In a case where the second indication information received by the terminal device indicates that the terminal device is not allowed to trigger the first SDT process, the terminal device cannot trigger the first SDT process. Alternatively, in a case where the terminal device is allowed to trigger the first SDT process, the network device may send the second indication information; in a case where the terminal device is not allowed to trigger the first SDT process, the network device may not send the second indication information. Alternatively, in a case where the terminal device is not allowed to trigger the first SDT process, the network device may send the second indication information; in a case where the terminal device is allowed to trigger the first SDT process, the network device may not send the second indication information.

[0075] In some embodiments, whether the terminal device is allowed to trigger the first SDT process can be determined based on the indication of resources by the network device. The resources indicated by the network device may include first-class resources and / or second-class resources. The first-class resources may be RA-SDT resources, and the second-class resources may be CG-SDT resources. As an implementation method, whether the terminal device is allowed to trigger the first SDT process can be determined based on whether the system message received by the terminal device contains information indicating the first-class resources. For example, in the case where the system message contains information about the first resource, the terminal device may be allowed to trigger the first SDT process. In the case where the system message does not contain information about the first resource, the terminal device may not be allowed to trigger the first SDT process. As an implementation method, whether the terminal device is allowed to trigger the first SDT process can be determined based on whether the radio resource release (RRC release) message received by the terminal device contains information indicating the second-class resources. For example, in the case where the radio resource release message contains the second-class resources, the terminal device may be allowed to trigger the first SDT process. In the case where the radio resource release message does not contain the second-class resources, the terminal device may not be allowed to trigger the first SDT process.

[0076] In some embodiments, whether the terminal device is allowed to trigger the first SDT process can be determined based on a threshold associated with the first SDT process. The threshold associated with the first SDT process may, for example, include a first data volume threshold for triggering the first SDT process and / or a first signal quality threshold for triggering the first SDT process. The first signal quality threshold may be represented by RSRP. For example, if the system broadcast message contains the first data volume threshold and / or the first signal quality threshold, the terminal device may be allowed to trigger the first SDT process. If the system broadcast message does not contain the first data volume threshold and / or the first signal quality threshold, the terminal device may not be allowed to trigger the first SDT process.

[0077] In some embodiments, whether the terminal device is allowed to trigger the first SDT process may be determined by the configuration information of the radio bearer that triggers the SDT process. For example, if the network device does not configure the first bearer set for the terminal device, the terminal device may not be allowed to trigger the first SDT process. If the network device configures the first bearer set for the terminal device, the terminal device may be allowed to trigger the first SDT process.

[0078] It should be noted that the configuration information of the network device may be carried in one or more of the following messages: a system broadcast message, a radio resource release (RRC release) message, and a paging message.

[0079] The configuration information of the network device may also be configured by the terminal device, that is, the configuration information of the terminal device may include the configuration information of the network device. For example, the configuration information of the terminal device may include: an indication of whether the terminal device is allowed to trigger the first SDT process. The configuration information of the terminal device may also include the priority of different SDT types.

[0080] The triggering condition of the SDT process may include a first triggering condition and / or a second triggering condition. The first triggering condition may correspond to a first SDT process triggered by the terminal device, and the second triggering condition may correspond to a second SDT process triggered by the network device.

[0081] As described above, the first SDT process triggered by the terminal device may be an MO-SDT process. The second SDT process triggered by the network device may be an MT-SDT process. Correspondingly, the first triggering condition may be a triggering condition for the MO-SDT process. The second triggering condition may be a triggering condition for the MT-SDT process. In some embodiments, the resources selected for the first SDT process may be resources for the MO-SDT process, and the resources selected for the second SDT process may be resources for the MT-SDT process.

[0082] In different situations, the conditions included in the first trigger condition may be different. Alternatively, in different situations, the conditions included in the second trigger condition may be different.

[0083] When the terminal device allows triggering the first SDT process, the first trigger condition may, for example, include one or more of the following conditions: the uplink data and / or signaling to be transmitted belongs to a radio bearer that allows triggering SDT, such as SRB, DRB; the amount of uplink data to be transmitted is less than the first data amount threshold pre-configured by the network; the downlink RSRP measurement result is greater than the first signal quality threshold (for example, the first RSRP threshold); and there are valid SDT resources, for example, RA-SDT resources and / or CG-SDT resources.

[0084] In the case where the terminal device allows the triggering of the first SDT process, the second trigger condition can be determined based on one or more of the following: an SDT indication sent by the network device, and the wireless link quality of the terminal device. For example, the second trigger condition may include one or more of the following: receiving a first paging message, and the paging message includes the identifier and / or SDT indication of the terminal device; the downlink signal quality of the terminal device is greater than or equal to a second threshold. The second threshold and the first signal quality threshold in the first trigger condition can be the same configuration or different configurations. The downlink signal quality can be represented by RSRP, for example.

[0085] In some embodiments, if the terminal device satisfies the first trigger condition and / or the second trigger condition, the terminal device may determine to trigger the SDT process. For example, if the terminal device allows the triggering of the first SDT process, the terminal device may determine whether to trigger the SDT process based on the first trigger condition and / or the second trigger condition. For example, in the case where the triggering of the first SDT process is allowed, if both the first trigger condition and the second trigger condition are met, the terminal device may determine to trigger the SDT process. Alternatively, if one of the first trigger condition and the second trigger condition is met, the terminal device may trigger the SDT process corresponding to the one condition, thereby triggering the appropriate SDT type, and thus enabling the transmission of a small amount of data by the terminal device in the RRC non-activated state. Alternatively, if both the first trigger condition and the second trigger condition are not met, the terminal device may trigger the RRC connection recovery process.

[0086] In some embodiments, when the first SDT process is not allowed to be triggered, the second trigger condition can be determined based on one or more of the following: SDT indication, the bearer of the uplink data of the terminal device, the data volume of the uplink data of the terminal device, the bearer of the uplink signaling of the terminal device, the wireless link quality of the terminal device, and whether there are valid SDT resources. For example, the second trigger condition includes one or more of the following: receiving a first paging message, and the first paging message contains the identifier and / or SDT indication of the terminal device, the wireless bearer corresponding to the uplink data is a wireless bearer that allows triggering SDT, the wireless bearer corresponding to the uplink signaling is a wireless bearer that allows triggering SDT, the data volume of the uplink data is less than or equal to the first threshold, the downlink signal quality of the terminal device is greater than or equal to the second threshold, and there are valid SDT resources. Among them, the first threshold and the first data volume threshold in the first trigger condition can be the same configuration or different configurations. The second threshold and the first signal quality threshold in the first trigger condition can be the same configuration or different configurations.

[0087] In some embodiments, the second trigger condition in which the first SDT process is not allowed to be triggered may also be referred to as a third trigger condition.

[0088] In the case where the terminal device does not allow the triggering of the first SDT process, even if the first trigger condition is met, the terminal device cannot trigger the first SDT process. In this case, if the RRC recovery process is triggered, unnecessary signaling overhead and resource occupancy will be caused. The present application adjusts the second trigger condition in a timely manner when the terminal device does not allow the triggering of the proposed SDT process, so that when the second trigger condition is met, uplink and downlink data / signaling can be transmitted together through the SDT process, thereby avoiding the RRC recovery process as much as possible and reducing signaling overhead and resource occupancy.

[0089] In some embodiments, when the first SDT process is not allowed to be triggered, the second trigger condition may also include: the wireless bearers of the uplink data / signaling of the terminal device all belong to the second bearer set, wherein the second bearer set is the wireless bearer that allows the triggering of the second SDT process.

[0090] If the second trigger condition is met, the second SDT process can be triggered. However, because the radio bearer for uplink data / signaling does not belong to the second bearer set, the second SDT process cannot transmit uplink data / signaling. To transmit uplink data / signaling, an RRC connection recovery process may still be required. It is understandable that if the RRC connection is restored, triggering the SDT process is unnecessary. Therefore, considering the radio bearer status in the second trigger condition can avoid unnecessary SDT processes.

[0091] As mentioned above, when both the first trigger condition and the second trigger condition are met, the terminal device can determine that the SDT process is triggered. This application also proposes that when both the first trigger condition and the second trigger condition are met, the terminal device can also determine the type of SDT process it triggers. The type of SDT process can be, for example, a first SDT process or a second SDT process. This is described in detail below.

[0092] In some embodiments, the SDT process may be a first SDT process. The uplink resources used for the first transmission of uplink data / signaling during the first SDT process may be CG-SDT resources or RA-SDT resources. Based on the CG-SDT resources or RA-SDT resources, a larger uplink grant (UL grant) may be applied for the first transmission of the first SDT process, thereby transmitting part or all of the uplink data during the first transmission, thereby improving transmission efficiency.

[0093] In some embodiments, the SDT process may be determined based on the priority order of the first SDT process and the second SDT process. For example, if the priority of the first SDT process is higher than or equal to the priority of the second SDT process, the SDT process may be the first SDT process. Alternatively, if the priority of the second SDT process is higher than or equal to the priority of the first SDT process, the SDT process may be the second SDT process.

[0094] In some embodiments, the SDT process may be determined based on the implementation of the terminal device. For example, if both the first trigger condition and the second trigger condition are met, the terminal device may initiate the first SDT process. Alternatively, if both the first trigger condition and the second trigger condition are met, the terminal device may initiate the second SDT process. Alternatively, the terminal device may combine the first trigger condition and / or the second trigger condition with other conditions to determine whether to initiate the first SDT process, the second SDT process, or the RRC recovery process.

[0095] In some embodiments, the method shown in FIG. 4 may further include step S420 .

[0096] In step S420, when both the first trigger condition and the second trigger condition are satisfied, the terminal device may send first indication information to the network device. The network device may receive the first indication information. The first indication information may be used to indicate that the triggering cause of the SDT process is that both the first trigger condition and the second trigger condition are satisfied. Alternatively, the first indication information may be used to indicate that both the first SDT process and the second SDT process are triggered.

[0097] In some embodiments, the first indication information may include a first restoration reason, which may be used to indicate that the terminal device meets the first trigger condition and the second trigger condition. Compared with MT-SDT and MO-SDT, the first restoration reason may be a new restoration reason.

[0098] In some embodiments, the first indication information may include a second recovery reason. When the terminal device selects resources corresponding to the first SDT process, the second recovery reason may be used to indicate that the terminal device meets the second trigger condition. When the terminal device selects resources corresponding to the second SDT process, the second recovery reason may be used to indicate that the terminal device meets the first trigger condition. For example, the terminal device may use MO-SDT uplink resources, and the recovery reason may be set to MT-SDT.

[0099] In some embodiments, the first indication information includes a third restoration reason and a fourth restoration reason, the third restoration reason being used to indicate that the terminal device satisfies the first trigger condition, and the fourth restoration reason being used to indicate that the terminal device satisfies the second trigger condition. In other words, the first indication information may include two restoration reasons, one for indicating that the terminal device satisfies the first trigger condition, and one for indicating that the terminal device satisfies the second trigger condition.

[0100] In some embodiments, if the SDT process is the first SDT process, the first indication information is used to indicate that the terminal device meets the second trigger condition; if the SDT process is the second SDT process, the first indication information is used to indicate that the terminal device meets the first trigger condition. The first indication information can be transmitted during the subsequent transmission process of the SDT process or during the initial transmission process. For example, the terminal device chooses to trigger the MO-SDT process, and after the first uplink transmission is successful, the second indication information is carried through the continuous uplink transmission process to inform the network device that the MT-SDT process is triggered at the same time.

[0101] In some embodiments, if the terminal device satisfies one of the first trigger condition and the second trigger condition, the target process may be an SDT process or an RRC connection recovery process corresponding to one of the trigger conditions. For example, if the terminal device does not satisfy the first trigger condition but satisfies the second trigger condition, the terminal device may determine that the target process is the second SDT process, i.e., the terminal device may trigger the second SDT process. Alternatively, if the terminal device does not satisfy the first trigger condition but satisfies the second trigger condition, the terminal device may determine that the target process is an RRC connection recovery process, i.e., the terminal device may trigger the RRC connection recovery process.

[0102] Optionally, if the terminal device meets the second trigger condition, and the reason for not meeting the first trigger condition is that there are no valid SDT resources and / or the radio bearer of the uplink data / signaling of the terminal device belongs to the second bearer set, then the target process may be the second SDT process. The second bearer set is a radio bearer that allows triggering the second SDT process. If the terminal device meets the second trigger condition, and the reason for not meeting the first trigger condition includes reasons other than the following reasons: there are no valid SDT resources and / or the radio bearer of the uplink data / signaling of the terminal device belongs to the second bearer set, then the target process is the RRC connection recovery process.

[0103] It should be noted that the above mentioned radio bearers that are allowed to trigger the first SDT process may be the first bearer set, and the radio bearers that are allowed to trigger the second SDT process may be the second bearer set. When the first bearer set and the second bearer set are the same, the terminal device can restore the first bearer set (i.e., the second bearer set) when triggering the SDT process. When the first bearer set and the second bearer set are different, if the terminal device meets the above conditions for triggering the SDT process, the terminal device can restore the first bearer set and the second bearer set so that the SDT process can transmit both uplink data / signaling and downlink data / signaling.

[0104] For ease of understanding, the method provided by this application is described in detail below through Example 1 and Example 2.

[0105] Example 1

[0106] Embodiment 1 can be applied to situations where different radio bearer configurations are configured to trigger MO-SDT and MT-SDT. The method provided in embodiment 1 can be performed by a terminal device and a network device. The terminal device is in an RRC inactive state. The method provided in embodiment 1 can include steps 510 to 540.

[0107] Step 510: The terminal device receives a paging message sent by the network device.

[0108] A paging message can be used to trigger a terminal device to initiate an SDT process. The paging message can include at least the terminal device ID and an SDT indication sent by the network device. The terminal device ID can be an I-RNTI or a 5G-S-TMSI. The SDT indication sent by the network device can be an MT-SDT indication.

[0109] The first SDT process initiated by the terminal device may be an MO-SDT process. The second SDT process initiated by the network device may be an MT-SDT process.

[0110] In step 520, the terminal device receives a first request from a higher layer of the terminal device. The first request is used to request the AS layer to restore the RRC connection.

[0111] The time relationship between the terminal device receiving the paging message and the first request may include: receiving the paging message and the first request at the same time; or, receiving the paging message first, and receiving the first request before determining to initiate the MT-SDT process; or, receiving the first request first, and receiving the paging message before determining to initiate the MO-SDT or RRC connection recovery process.

[0112] In a case where the terminal device allows triggering of the MO-SDT process, the terminal device may execute step 530 .

[0113] In step 530 , the terminal device may determine whether the terminal device satisfies the first trigger condition and the second trigger condition.

[0114] The first triggering condition may be a condition for triggering MO-SDT. The first triggering condition may include, for example, one or more of the following conditions: the uplink data and / or signaling to be transmitted belongs to a radio bearer that allows triggering SDT, such as an SRB or DRB; the amount of uplink data to be transmitted is less than a first data amount threshold preconfigured by the network; the downlink RSRP measurement result is greater than a first signal quality threshold (e.g., a first RSRP threshold); and the existence of valid SDT resources, such as RA-SDT resources and / or CG-SDT resources.

[0115] The second trigger condition may be a condition for triggering MT-SDT. The second trigger condition may include, for example, receiving a paging message including a terminal device ID and an MT-SDT indication; and / or a downlink RSRP being greater than or equal to a second RSRP threshold (i.e., the second threshold described above). The first RSRP threshold and the second RSRP threshold may be configured in the same or different configurations.

[0116] In a case where both the first trigger condition and the second trigger condition are satisfied, step 530 may include step 531 .

[0117] In step 531, the terminal device may trigger the MO-SDT process. The uplink resources used for the initial transmission of uplink data / signaling may include CG-SDT resources or RA-SDT resources.

[0118] In the case that the first trigger condition is not satisfied, but the second trigger condition is satisfied, step 530 may include step 532 .

[0119] In step 532, the terminal device may trigger the MT-SDT process.

[0120] Optionally, if the reason for not meeting the first trigger condition is the absence of valid SDT resources, the terminal device may execute step 532. If the reason for not meeting the first trigger condition includes other reasons except the absence of valid SDT resources, the terminal device may trigger the RRC connection recovery process.

[0121] In a case where both the first trigger condition and the second trigger condition are not satisfied, step 530 may include step 533 .

[0122] Step 533: The terminal device triggers the RRC connection recovery process.

[0123] In the case that the terminal device does not allow triggering of the MO-SDT process, the terminal device may execute step 540 .

[0124] Step 540: The terminal device triggers the RRC connection recovery process or the MT-SDT process.

[0125] In some implementations, when the third trigger condition is met, the terminal device may trigger the MT-SDT process in step 540; when the third trigger condition is not met, the terminal device may trigger the RRC connection recovery process in step 540.

[0126] The third trigger condition may include one or more of the following conditions: the terminal device receives a paging message containing the terminal device ID and the MT-SDT indication; all the radio bearers corresponding to the uplink data / signaling are radio bearers that allow triggering SDT; the uplink data volume is less than or equal to the second data volume threshold (i.e., the first threshold mentioned above), and the second data volume threshold may be the same configuration or a different configuration as the first data volume threshold; the downlink RSRP is greater than or equal to the second RSRP threshold (i.e., the second threshold mentioned above); there are valid SDT resources, including RA-SDT resources and / or CG-SDT resources.

[0127] During the execution of the method of embodiment 1, if the terminal device triggers the MT-SDT process, the uplink resources used for the first transmission of uplink data / signaling may satisfy: if the CG-SDT resources are valid, the terminal device may select the CG-SDT resources; if the CG-SDT resources are invalid and the RA-SDT resources are valid, the terminal device may select the RA-SDT resources; if both the CG-SDT resources and the RA-SDT resources are invalid, the terminal device may select the normal RACH resources. Alternatively, the uplink resources used for the first transmission of uplink data / signaling may satisfy: if the CG-SDT resources are valid, the terminal device may select the CG-SDT resources; if the CG-SDT resources are invalid, the terminal device may select the normal RACH resources. Alternatively, the terminal device may directly select the normal RACH resources for the first transmission of uplink data / signaling.

[0128] Embodiment 1 also provides a method for determining whether a terminal device is allowed to trigger the MO-SDT process. When one or more of the following conditions are met, the terminal device can determine that the terminal device is allowed to trigger the MO-SDT process: the system broadcast message contains RA-SDT resources; the RRC connection release message contains CG-SDT resources; the system broadcast message contains a first data volume threshold and / or a first RSRP threshold for triggering MO-SDT; the terminal device receives second indication information, and the second indication information is used to indicate that the terminal device can trigger MO-SDT when receiving a paging message containing an MT-SDT indication.

[0129] Example 2

[0130] Embodiment 2 may address situations where different radio bearers are permitted to trigger MO-SDT and MT-SDT. The method provided in Embodiment 2 may be performed by a terminal device and a network device. In Embodiment 2, the first SDT process initiated by the terminal device may be an MO-SDT process. The second SDT process initiated by the network device may be an MT-SDT process. The method provided in Embodiment 2 may include steps 610 to 650.

[0131] In step 610, the terminal device receives first configuration information. The first configuration information includes the configuration of radio bearers that are allowed to trigger MO-SDT and / or the configuration of radio bearers that are allowed to trigger MT-SDT. For example, the first configuration information is used to configure the set of radio bearers that are allowed to trigger MO-SDT to be set #1 and / or the set of radio bearers that are allowed to trigger MT-SDT to be set #2.

[0132] Step 620: The terminal device in the RRC inactive state receives a paging message sent by the network device.

[0133] A paging message can be used to trigger a terminal device to initiate an SDT process. The paging message can include at least the terminal device ID and an SDT indication sent by the network device. The terminal device ID can be an I-RNTI or a 5G-S-TMSI. The SDT indication sent by the network device can be an MT-SDT indication.

[0134] In step 630, the terminal device receives a first request from a higher layer of the terminal device. The first request is used to request the AS layer to restore the RRC connection.

[0135] The time relationship between the terminal device receiving the paging message and the first request may include: receiving the paging message and the first request at the same time; or, receiving the paging message first, and receiving the first request before determining to initiate the MT-SDT process; or, receiving the first request first, and receiving the paging message before determining to initiate the MO-SDT or RRC connection recovery process.

[0136] In a case where the terminal device allows triggering of the MO-SDT process, the terminal device may execute step 640 .

[0137] In step 640 , the terminal device may determine whether the terminal device satisfies the first trigger condition and the second trigger condition.

[0138] The first triggering condition may be a condition for triggering MO-SDT. The first triggering condition may include, for example, one or more of the following conditions: the uplink data and / or signaling to be transmitted belongs to a radio bearer that allows triggering SDT, such as an SRB or DRB; the amount of uplink data to be transmitted is less than a first data amount threshold preconfigured by the network; the downlink RSRP measurement result is greater than a first signal quality threshold (e.g., a first RSRP threshold); and the existence of valid SDT resources, such as RA-SDT resources and / or CG-SDT resources.

[0139] The second trigger condition may be a condition for triggering MT-SDT. For example, the second trigger condition may include: receiving a paging message containing the terminal device ID and an MT-SDT indication; and / or the downlink RSRP being greater than or equal to a second RSRP threshold. The first RSRP threshold and the second RSRP threshold may be configured in the same or different configurations.

[0140] When both the first trigger condition and the second trigger condition are satisfied, step 640 may further include step 641 .

[0141] Step 641: The terminal device triggers the MO-SDT process.

[0142] In some embodiments, step 641 may include selecting a type of triggering SDT based on an implementation of the terminal device.

[0143] Step 641 may also include: the terminal device restores the radio bearers configured in set #1 and set #2.

[0144] Step 641 may further include: the terminal device notifies the network device that the triggering conditions of two types of SDTs are met simultaneously by sending first indication information based on one of the first to fourth methods.

[0145] Method 1: A new resume cause is introduced into the first indication information, and the new resume cause is the first resume cause. The first resume cause is used to inform the network device that the terminal device has triggered both MT-SDT and MO-SDT.

[0146] Method 2: The terminal device selects the MO-SDT resource and sets the restoration reason of the first indication information as the second restoration reason. The second restoration reason is used to indicate that the terminal device has also triggered the MT-SDT.

[0147] Mode 3: The first indication information carries the third restoration reason and the fourth restoration reason. The third restoration reason can be used to indicate that the terminal device meets the MO-SDT triggering condition. The fourth restoration reason can be used to indicate that the terminal device meets the MT-SDT triggering condition.

[0148] Method 4: The first indication information is used to inform the network device that the triggering conditions of another type of SDT are met during the subsequent transmission phase. For example, the terminal device chooses to trigger the MO-SDT process. After the first uplink transmission is successful, the terminal device carries the first indication information through a continuous uplink transmission to inform the network device that the triggering conditions of the MT-SDT are also met. Optionally, the first indication information can also be carried in the first uplink transmission of the MO-SDT.

[0149] It should be noted that if the target process is the second SDT process triggered by the network device, the uplink resources used for the first transmission of uplink data / signaling meet one of the following conditions: when the CG-SDT resources are valid, the uplink resources are CG-SDT resources; when the CG-SDT resources are invalid and the RA-SDT resources are valid, the uplink resources are RA-SDT resources; when both the CG-SDT resources and the RA-SDT resources are invalid, the uplink resources are normal RACH resources; when the CG-SDT resources are valid, the uplink resources are CG-SDT resources; when the CG-SDT resources are invalid, the uplink resources are normal RACH resources; the uplink resources are normal RACH resources.

[0150] In a case where the first trigger condition is not satisfied but the second trigger condition is satisfied, step 640 may further include step 642 .

[0151] Step 642: The terminal device triggers the MT-SDT process or the RRC connection recovery process.

[0152] Optionally, if the reason why the first trigger condition is not met is that there are no valid SDT resources, and / or all the uplink data to be transmitted belong to the radio bearers configured in set #2, the terminal device can trigger the MT-SDT process. If the reason why the first trigger condition is not met includes other reasons other than the fact that there are no valid SDT resources, and / or all the uplink data to be transmitted belong to the radio bearers configured in set #2, the terminal device can trigger the RRC connection recovery process. For example, if all the uplink data to be transmitted belong to the radio bearers configured in set 2, the terminal device can further determine whether to trigger MT-SDT based on the amount of data. When the total amount of data to be transmitted is less than or equal to the second data threshold, the terminal device can trigger the MT-SDT process.

[0153] In the case that both the first trigger condition and the second trigger condition are not satisfied, step 640 may further include step 643 .

[0154] Step 643: The terminal device triggers the RRC connection recovery process.

[0155] In the case that the terminal device does not allow triggering of the MO-SDT process, the terminal device may execute step 650 .

[0156] Step 650: The terminal device triggers the RRC connection recovery process or the MT-SDT process.

[0157] Optionally, when the terminal device meets the third trigger condition, the terminal device may trigger the MT-SDT process in step 650; when the third trigger condition is not met, the terminal device may trigger the RRC connection recovery process in step 650.

[0158] The third trigger condition may include one or more of the following conditions: the terminal device receives a paging message containing the terminal device ID and the MT-SDT indication; all the radio bearers corresponding to the uplink data / signaling belong to the radio bearers configured in set #2; the amount of uplink data on the radio bearers configured in set #2 is not greater than the second data amount threshold (i.e., the first threshold mentioned above), and the second data amount threshold and the first data amount threshold are the same configuration or different configurations; the downlink RSRP is greater than or equal to the second RSRP threshold (i.e., the second threshold mentioned above); there are valid SDT resources, including RA-SDT resources and / or CG-SDT resources.

[0159] During the execution of the method of Example 2, if the terminal device triggers the MT-SDT process, the uplink resources used for the first transmission of uplink data / signaling may satisfy: if the CG-SDT resources are valid, the terminal device may select the CG-SDT resources; if the CG-SDT resources are invalid and the RA-SDT resources are valid, the terminal device may select the RA-SDT resources; if both the CG-SDT resources and the RA-SDT resources are invalid, the terminal device may select normal RACH resources. Alternatively, the uplink resources used for the first transmission of uplink data / signaling may satisfy: if the CG-SDT resources are valid, the terminal device may select the CG-SDT resources; if the CG-SDT resources are invalid, the terminal device may select normal RACH resources. Alternatively, the terminal device may directly select normal RACH resources for the first transmission of uplink data / signaling.

[0160] Embodiment 2 also provides a method for determining whether a terminal device is allowed to trigger the MO-SDT process. When one or more of the following conditions are met, the terminal device can determine that the terminal device is allowed to trigger the MO-SDT process: the system broadcast message contains RA-SDT resources; the RRC connection release message contains CG-SDT resources; the system broadcast message contains a first data volume threshold and / or a first RSRP threshold for triggering MO-SDT; the terminal device receives a second indication information, and the second indication information is used to indicate that the terminal device can trigger MO-SDT when receiving a paging message containing an MT-SDT indication.

[0161] The method embodiment of the present application is described in detail above. The following device embodiment of the present application is described in detail in conjunction with Figures 5 to 7. It should be understood that the description of the method embodiment corresponds to the description of the device embodiment. Therefore, for parts not described in detail, reference can be made to the above method embodiment.

[0162] FIG5 shows a terminal device 500 provided in an embodiment of the present application. The terminal device 500 includes: a determining unit 510 .

[0163] The determination unit 510 is used to determine whether to trigger the target process if the terminal device receives a small data transmission SDT indication sent by the network device and the terminal device receives a first request; wherein the target process includes an SDT process or a radio resource control RRC connection recovery process, and the first request is used to request the access layer of the terminal device to restore the RRC connection.

[0164] In some embodiments, the target process is determined based on one or more of the following: configuration information of the network device; pre-configuration information of the terminal device; implementation of the terminal device; and triggering conditions of the SDT process; wherein the triggering conditions of the SDT process include a first triggering condition and / or a second triggering condition, the first triggering condition corresponds to the first SDT process triggered by the terminal device, and the second triggering condition corresponds to the second SDT process triggered by the network device.

[0165] In some embodiments, the determination unit is specifically used to: determine to trigger the SDT process if the terminal device meets the first trigger condition and the second trigger condition; wherein the SDT process meets one of the following: the SDT process is the first SDT process; the SDT process is determined based on the priority order of the first SDT process and the second SDT process; and the SDT process is determined based on the implementation of the terminal device.

[0166] In some embodiments, the terminal device 500 also includes: a first receiving unit, used to receive first configuration information, wherein the first configuration information is used to indicate one or more of the following information: the wireless bearer allowed to trigger the first SDT process is a first bearer set, and the wireless bearer allowed to trigger the second SDT process is a second bearer set; a recovery unit, used to restore the wireless bearer of the first bearer set and / or the second bearer set.

[0167] In some embodiments, the terminal device 500 also includes: a first sending unit, used to send first indication information to the network device if the terminal device meets the first trigger condition and the second trigger condition, and the first indication information is used to indicate that the triggering reason of the SDT process is that both the first trigger condition and the second trigger condition are met.

[0168] In some embodiments, the first indication information satisfies one of the following: the first indication information includes a first recovery reason, and the first recovery reason is used to indicate that the terminal device satisfies the first trigger condition and the second trigger condition; the first indication information includes a second recovery reason, and when the terminal device selects the resource corresponding to the first SDT process, the second recovery reason is used to indicate that the terminal device satisfies the second trigger condition, and when the terminal device selects the resource corresponding to the second SDT process, the second recovery reason is used to indicate that the terminal device satisfies the first trigger condition; the first indication information includes a third recovery reason and a fourth recovery reason, and the third recovery reason is used to indicate that the terminal device satisfies the first trigger condition, and the fourth recovery reason is used to indicate that the terminal device satisfies the second trigger condition; if the SDT process is the first SDT process, the first indication information is used to indicate that the terminal device satisfies the second trigger condition, and if the SDT process is the second SDT process, the first indication information is used to indicate that the terminal device satisfies the first trigger condition.

[0169] In some embodiments, if the terminal device satisfies one of the first trigger condition and the second trigger condition, the target process is: the SDT process corresponding to the one trigger condition; or the RRC connection recovery process.

[0170] In some embodiments, if the terminal device satisfies the second trigger condition, and the reason for not satisfying the first trigger condition is that there are no valid SDT resources and / or the wireless bearer of the uplink data / signaling of the terminal device belongs to a second bearer set, then the target process is the second SDT process, wherein the second bearer set is a wireless bearer that allows triggering the second SDT process.

[0171] In some embodiments, if the terminal device satisfies the second trigger condition, and the reason for not satisfying the first trigger condition includes reasons other than the following reasons: there are no valid SDT resources and / or the wireless bearer of the uplink data / signaling of the terminal device belongs to a second bearer set, then the target process is the RRC connection recovery process, wherein the second bearer set is a set of wireless bearers that allow triggering the second SDT process.

[0172] In some embodiments, if the terminal device does not meet the first trigger condition and the second trigger condition, the target process is the RRC connection recovery process.

[0173] In some embodiments, when triggering of the first SDT process is allowed, the second trigger condition is determined based on one or more of the following: the SDT indication; the wireless link quality of the terminal device.

[0174] In some embodiments, the second trigger condition includes one or more of the following: receiving a first paging message, and the first paging message includes the identifier of the terminal device and / or the SDT indication; the downlink signal quality of the terminal device is greater than or equal to a second threshold.

[0175] In some embodiments, when triggering the first SDT process is not allowed, the second trigger condition is determined based on one or more of the following: the SDT indication; the carrier of uplink data of the terminal device; the data volume of the uplink data of the terminal device; the carrier of uplink signaling of the terminal device; the wireless link quality of the terminal device; and whether there are valid SDT resources.

[0176] In some embodiments, the second trigger condition includes one or more of the following: receiving a first paging message, and the first paging message includes the identifier of the terminal device and / or the SDT indication; the wireless bearer corresponding to the uplink data is a wireless bearer that allows triggering SDT; the wireless bearer corresponding to the uplink signaling is a wireless bearer that allows triggering SDT; the data volume of the uplink data is less than or equal to the first threshold; the downlink signal quality of the terminal device is greater than or equal to the second threshold; there are valid SDT resources.

[0177] In some embodiments, the second trigger condition also includes: the radio bearers of the uplink data / signaling of the terminal device all belong to a second bearer set, wherein the second bearer set is a radio bearer that allows triggering the second SDT process.

[0178] In some embodiments, if triggering the first SDT process initiated by the terminal device is not allowed, the target process is: the second SDT process initiated by the network device; or the RRC connection recovery process.

[0179] In some embodiments, whether the first SDT process triggered by the terminal device is allowed to be triggered is determined based on one or more of the following: whether the system message received by the terminal device contains information indicating the first type of resources; whether the wireless resource release message received by the terminal device contains information indicating the second type of resources; whether the system message received by the terminal device contains a threshold associated with the first SDT process; and the second indication information received by the terminal device, the second indication information is used to indicate whether the terminal device is allowed to trigger the first process when receiving the SDT indication sent by the network device; wherein the first type of resources are small data transmission RA-SDT resources based on random access, and the second type of resources are small data transmission CG-SDT resources based on configuration authorization.

[0180] In some embodiments, the SDT indication is carried in a paging message, and the time when the terminal device receives the paging message and the first request satisfies one of the following relationships: the terminal device receives the paging message and the first recovery request at the same time; the terminal device first receives the paging message and receives the first request before determining to initiate the SDT process; the terminal device first receives the first request and receives the paging message before determining to initiate the SDT process or the RRC connection recovery process.

[0181] In some embodiments, if the target process is the second SDT process triggered by the network device, the uplink resource used for the first transmission of uplink data / signaling satisfies one of the following: when the CG-SDT resource is valid, the uplink resource is the CG-SDT resource; when the CG-SDT resource is invalid and the RA-SDT resource is valid, the uplink resource is the RA-SDT resource; when both the CG-SDT resource and the RA-SDT resource are invalid, the uplink resource is the normal RACH resource; when the CG-SDT resource is valid, the uplink resource is the CG-SDT resource; when the CG-SDT resource is invalid, the uplink resource is the normal RACH resource; the uplink resource is the normal RACH resource.

[0182] FIG6 is a schematic structural diagram of a network device 600 provided in an embodiment of the present application. The network device 600 includes: a second receiving unit 610 .

[0183] The second receiving unit 610 is used to receive the first indication information sent by the terminal device if the first trigger condition and the second trigger condition are met; wherein the first trigger condition corresponds to the first SDT process triggered by the terminal device, the second trigger condition corresponds to the second SDT process triggered by the network device, and the first indication information is used to indicate that the triggering reason of the SDT process is that both the first trigger condition and the second trigger condition are met.

[0184] In some embodiments, the first indication information satisfies one of the following: the first indication information includes a first recovery reason, and the first recovery reason is used to indicate that the terminal device satisfies the first trigger condition and the second trigger condition; the first indication information includes a second recovery reason, and when the terminal device selects the resource corresponding to the first SDT process, the second recovery reason is used to indicate that the terminal device satisfies the second trigger condition, and when the terminal device selects the resource corresponding to the second SDT process, the second recovery reason is used to indicate that the terminal device satisfies the first trigger condition; the first indication information includes a third recovery reason and a fourth recovery reason, and the third recovery reason is used to indicate that the terminal device satisfies the first trigger condition, and the fourth recovery reason is used to indicate that the terminal device satisfies the second trigger condition; if the SDT process is the first SDT process, the first indication information is used to indicate that the terminal device satisfies the second trigger condition, and if the SDT process is the second SDT process, the first indication information is used to indicate that the terminal device satisfies the first trigger condition.

[0185] In an optional embodiment, the second receiving unit 610 may be a transceiver 730, and the determining unit 510 may be a processor 710. The terminal device 500 or the network device 600 may further include a memory 720, as specifically shown in FIG7 .

[0186] Figure 7 is a schematic block diagram of a communication device according to an embodiment of the present application. The dashed lines in Figure 7 indicate that the unit or module is optional. The device 700 may be used to implement the method described in the above method embodiment. The device 700 may be a chip, a terminal device, or a network device.

[0187] The device 700 may include one or more processors 710. The processor 710 may support the device 700 to implement the method described in the method embodiment above. The processor 710 may be a general-purpose processor or a special-purpose processor. For example, the processor may be a central processing unit (CPU). Alternatively, the processor may be another general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, etc. The general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc.

[0188] The apparatus 700 may further include one or more memories 720. The memories 720 store programs that can be executed by the processor 710, causing the processor 710 to perform the methods described in the above method embodiments. The memories 720 may be independent of the processor 710 or integrated into the processor 710.

[0189] The apparatus 700 may further include a transceiver 730. The processor 710 may communicate with other devices or chips via the transceiver 730. For example, the processor 710 may transmit and receive data with other devices or chips via the transceiver 730.

[0190] The present application also provides a computer-readable storage medium for storing a program. The computer-readable storage medium can be applied to a terminal or network device provided in the present application, and the program enables a computer to execute the method performed by the terminal or network device in each embodiment of the present application.

[0191] The present application also provides a computer program product. The computer program product includes a program. The computer program product can be applied to a terminal or network device provided in the present application, and the program causes a computer to execute the method performed by the terminal or network device in each embodiment of the present application.

[0192] The embodiments of the present application also provide a computer program. The computer program can be applied to the terminal or network device provided in the embodiments of the present application, and the computer program enables a computer to execute the method performed by the terminal or network device in each embodiment of the present application.

[0193] It should be understood that the terms "system" and "network" in this application can be used interchangeably. In addition, the terms used in this application are only used to explain the specific embodiments of this application and are not intended to limit this application. The terms "first", "second", "third", and "fourth" in the specification and claims of this application and the accompanying drawings are used to distinguish different objects rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0194] In the embodiments of this application, the term "indication" may refer to a direct indication, an indirect indication, or an indication of an association. For example, "A indicates B" may refer to a direct indication of B, e.g., B can obtain information through A; it may refer to an indirect indication of B, e.g., A indicates C, e.g., B can obtain information through C; or it may refer to an association between A and B.

[0195] In the embodiment of the present application, "B corresponding to A" means that B is associated with A and B can be determined based on A. However, it should be understood that determining B based on A does not mean determining B based solely on A, but B can also be determined based on A and / or other information.

[0196] In the embodiments of the present application, the term "corresponding" may indicate a direct or indirect correspondence between the two, or an association relationship between the two, or a relationship between indication and indication, configuration and configuration, etc.

[0197] In the embodiments of the present application, "pre-definition" or "pre-configuration" may be implemented by pre-storing corresponding codes, tables, or other methods that can be used to indicate relevant information in a device (e.g., a terminal device and a network device). The present application does not limit the specific implementation method. For example, pre-definition may refer to information defined in a protocol.

[0198] In the embodiments of the present application, the “protocol” may refer to a standard protocol in the communications field, for example, it may include an LTE protocol, an NR protocol, and related protocols used in future communication systems, and the present application does not limit this.

[0199] In the embodiments of this application, the term "and / or" is simply a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0200] In various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0201] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0202] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0203] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0204] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center via a wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) method. The computer-readable storage medium can be any available medium that can be read by a computer or a data storage device such as a server or data center that includes one or more available media integrated therein. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a digital versatile disc (DVD)), or a semiconductor medium (eg, a solid state disk (SSD)).

[0205] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A method for transmitting data, characterized in that include: If the terminal device receives a small data transmission SDT indication sent by the network device and the terminal device receives the first request, the terminal device determines whether to trigger the target process; The target process includes an SDT process or a radio resource control RRC connection recovery process, and the first request is used to request the access layer of the terminal device to restore the RRC connection.

2. The method according to claim 1, characterized in that The target process is determined based on one or more of the following: Configuration information of the network device; pre-configuration information of the terminal device; Implementation of said terminal device; and The triggering condition of the SDT process; Among them, the triggering conditions of the SDT process include a first triggering condition and / or a second triggering condition, the first triggering condition corresponds to the first SDT process triggered by the terminal device, and the second triggering condition corresponds to the second SDT process triggered by the network device.

3. The method according to claim 2, characterized in that The terminal device determines whether to trigger the target process including: If the terminal device meets the first trigger condition and the second trigger condition, the terminal device determines to trigger the SDT process; The SDT process satisfies one of the following conditions: The SDT process is the first SDT process; The SDT process is determined based on a priority order of the first SDT process and the second SDT process; and The SDT process is determined based on the implementation of the terminal device.

4. The method according to claim 3, characterized in that Also includes: The terminal device receives first configuration information, where the first configuration information is used to indicate one or more of the following information: the radio bearer allowed to trigger the first SDT process is a first bearer set, and the radio bearer allowed to trigger the second SDT process is a second bearer set; The terminal device restores the radio bearers of the first bearer set and / or the second bearer set.

5. The method according to claim 3 or 4, characterized in that The method further comprises: If the terminal device satisfies the first trigger condition and the second trigger condition, the terminal device sends first indication information to the network device, where the first indication information is used to indicate that the triggering reason of the SDT process is that both the first trigger condition and the second trigger condition are met.

6. The method according to claim 5, characterized in that The first indication information satisfies one of the following conditions: The first indication information includes a first restoration reason, where the first restoration reason is used to indicate that the terminal device meets the first trigger condition and the second trigger condition; The first indication information includes a second recovery reason. When the terminal device selects the resource corresponding to the first SDT process, the second recovery reason is used to indicate that the terminal device meets the second trigger condition. When the terminal device selects the resource corresponding to the second SDT process, the second recovery reason is used to indicate that the terminal device meets the first trigger condition. The first indication information includes a third restoration reason and a fourth restoration reason, the third restoration reason is used to indicate that the terminal device meets the first trigger condition, and the fourth restoration reason is used to indicate that the terminal device meets the second trigger condition; If the SDT process is the first SDT process, the first indication information is used to indicate that the terminal device meets the second trigger condition; if the SDT process is the second SDT process, the first indication information is used to indicate that the terminal device meets the first trigger condition.

7. The method according to claim 2, characterized in that If the terminal device satisfies one of the first trigger condition and the second trigger condition, the target process is: The SDT process corresponding to the trigger condition; or The RRC connection recovery process.

8. The method according to claim 7, characterized in that If the terminal device meets the second trigger condition, and the reason for not meeting the first trigger condition is that there are no valid SDT resources and / or the wireless bearer of the uplink data / signaling of the terminal device belongs to the second bearer set, then the target process is the second SDT process, wherein the second bearer set is a wireless bearer that allows triggering the second SDT process.

9. The method according to claim 7, characterized in that If the terminal device meets the second trigger condition, and the reason for not meeting the first trigger condition includes reasons other than the following reasons: there are no valid SDT resources and / or the wireless bearer of the uplink data / signaling of the terminal device belongs to the second bearer set, then the target process is the RRC connection recovery process, wherein the second bearer set is a set of wireless bearers that allow triggering the second SDT process.

10. The method according to claim 2, characterized in that If the terminal device does not meet the first trigger condition and the second trigger condition, the target process is the RRC connection recovery process.

11. The method according to any one of claims 2 to 10, characterized in that In a case where triggering of the first SDT process is permitted, the second triggering condition is determined based on one or more of the following: The SDT indication; The wireless link quality of the terminal device.

12. The method according to claim 11, characterized in that The second trigger condition includes one or more of the following: receiving a first paging message, where the first paging message includes an identifier of the terminal device and / or the SDT indication; The downlink signal quality of the terminal device is greater than or equal to the second threshold.

13. The method according to any one of claims 2 to 10, characterized in that In a case where triggering of the first SDT process is not allowed, the second triggering condition is determined based on one or more of the following: The SDT indication; Bearing of uplink data of the terminal device; The amount of uplink data of the terminal device; Bearing of uplink signaling of the terminal device; wireless link quality of the terminal device; as well as Check whether there are valid SDT resources.

14. The method according to claim 13, characterized in that The second trigger condition includes one or more of the following: receiving a first paging message, where the first paging message includes an identifier of the terminal device and / or the SDT indication; The radio bearer corresponding to the uplink data is a radio bearer that allows triggering SDT; The radio bearer corresponding to the uplink signaling is a radio bearer that allows triggering SDT; The amount of uplink data is less than or equal to a first threshold; The downlink signal quality of the terminal device is greater than or equal to a second threshold; A valid SDT resource exists.

15. The method according to claim 14, characterized in that The second trigger condition also includes: the radio bearers of the uplink data / signaling of the terminal device all belong to a second bearer set, wherein the second bearer set is a radio bearer that allows triggering the second SDT process.

16. The method according to claims 1-15, characterized in that If triggering the first SDT process initiated by the terminal device is not allowed, the target process is: A second SDT process initiated by the network device; or The RRC connection recovery process.

17. The method according to any one of claims 1 to 16, characterized in that Whether to allow triggering the first SDT process triggered by the terminal device is determined based on one or more of the following: Whether the system message received by the terminal device includes information indicating the first category of resources; whether the radio resource release message received by the terminal device includes information indicating the second type of resources; whether the system message received by the terminal device includes a threshold associated with the first SDT process; and Second indication information received by the terminal device, where the second indication information is used to indicate whether the terminal device allows triggering the first process when receiving the SDT indication sent by the network device; The first type of resources are small data transmission RA-SDT resources based on random access, and the second type of resources are small data transmission CG-SDT resources based on configuration authorization.

18. The method according to any one of claims 1 to 17, characterized in that The SDT indication is carried in a paging message, and the time when the terminal device receives the paging message and the first request satisfies one of the following relationships: The terminal device receives the paging message and the first restoration request simultaneously; The terminal device first receives the paging message, and before determining to initiate the SDT process, receives the first request; The terminal device first receives the first request and receives the paging message before determining to initiate the SDT process or the RRC connection recovery process.

19. The method according to any one of claims 1 to 18, characterized in that If the target process is a second SDT process triggered by the network device, the uplink resources used for the first transmission of uplink data / signaling meet one of the following conditions: When the CG-SDT resource is valid, the uplink resource is the CG-SDT resource; when the CG-SDT resource is invalid and the RA-SDT resource is valid, the uplink resource is the RA-SDT resource; when both the CG-SDT resource and the RA-SDT resource are invalid, the uplink resource is the normal RACH resource; When the CG-SDT resource is valid, the uplink resource is the CG-SDT resource; when the CG-SDT resource is invalid, the uplink resource is the normal RACH resource; The uplink resource is the normal RACH resource.

20. A method for transmitting data, characterized in that include: If the first trigger condition and the second trigger condition are met, the network device receives the first indication information sent by the terminal device; Among them, the first trigger condition corresponds to the first SDT process triggered by the terminal device, the second trigger condition corresponds to the second SDT process triggered by the network device, and the first indication information is used to indicate that the triggering reason of the SDT process is that both the first trigger condition and the second trigger condition are met.

21. The method according to claim 20, characterized in that The first indication information satisfies one of the following conditions: The first indication information includes a first restoration reason, where the first restoration reason is used to indicate that the terminal device meets the first trigger condition and the second trigger condition; The first indication information includes a second recovery reason. When the terminal device selects the resource corresponding to the first SDT process, the second recovery reason is used to indicate that the terminal device meets the second trigger condition. When the terminal device selects the resource corresponding to the second SDT process, the second recovery reason is used to indicate that the terminal device meets the first trigger condition. The first indication information includes a third restoration reason and a fourth restoration reason, the third restoration reason is used to indicate that the terminal device meets the first trigger condition, and the fourth restoration reason is used to indicate that the terminal device meets the second trigger condition; If the SDT process is the first SDT process, the first indication information is used to indicate that the terminal device meets the second trigger condition; if the SDT process is the second SDT process, the first indication information is used to indicate that the terminal device meets the first trigger condition.

22. A terminal device, characterized in that: include: a determining unit, configured to determine whether to trigger a target process if the terminal device receives a small data transmission SDT indication sent by the network device and the terminal device receives a first request; The target process includes an SDT process or a radio resource control RRC connection recovery process, and the first request is used to request the access layer of the terminal device to restore the RRC connection.

23. The terminal device according to claim 22, characterized in that The target process is determined based on one or more of the following: Configuration information of the network device; pre-configuration information of the terminal device; Implementation of said terminal device; and The triggering condition of the SDT process; Among them, the triggering conditions of the SDT process include a first triggering condition and / or a second triggering condition, the first triggering condition corresponds to the first SDT process triggered by the terminal device, and the second triggering condition corresponds to the second SDT process triggered by the network device.

24. The terminal device according to claim 23, characterized in that The determining unit is specifically configured to: If the terminal device meets the first trigger condition and the second trigger condition, determine to trigger the SDT process; The SDT process satisfies one of the following conditions: The SDT process is the first SDT process; The SDT process is determined based on a priority order of the first SDT process and the second SDT process; and The SDT process is determined based on the implementation of the terminal device.

25. The terminal device according to claim 24, characterized in that Also includes: A first receiving unit is configured to receive first configuration information, where the first configuration information is used to indicate one or more of the following information: the radio bearer allowed to trigger the first SDT process is a first bearer set, and the radio bearer allowed to trigger the second SDT process is a second bearer set; A recovery unit is configured to recover the radio bearers of the first bearer set and / or the second bearer set.

26. The terminal device according to claim 24 or 25, characterized in that: Also includes: The first sending unit is used to send first indication information to the network device if the terminal device meets the first trigger condition and the second trigger condition, wherein the first indication information is used to indicate that the triggering reason of the SDT process is that both the first trigger condition and the second trigger condition are met.

27. The terminal device according to claim 26, characterized in that The first indication information satisfies one of the following conditions: The first indication information includes a first restoration reason, where the first restoration reason is used to indicate that the terminal device meets the first trigger condition and the second trigger condition; The first indication information includes a second recovery reason. When the terminal device selects the resource corresponding to the first SDT process, the second recovery reason is used to indicate that the terminal device meets the second trigger condition. When the terminal device selects the resource corresponding to the second SDT process, the second recovery reason is used to indicate that the terminal device meets the first trigger condition. The first indication information includes a third restoration reason and a fourth restoration reason, the third restoration reason is used to indicate that the terminal device meets the first trigger condition, and the fourth restoration reason is used to indicate that the terminal device meets the second trigger condition; If the SDT process is the first SDT process, the first indication information is used to indicate that the terminal device meets the second trigger condition; if the SDT process is the second SDT process, the first indication information is used to indicate that the terminal device meets the first trigger condition.

28. The terminal device according to claim 23, characterized in that If the terminal device satisfies one of the first trigger condition and the second trigger condition, the target process is: The SDT process corresponding to the trigger condition; or The RRC connection recovery process.

29. The terminal device according to claim 28, characterized in that If the terminal device meets the second trigger condition, and the reason for not meeting the first trigger condition is that there are no valid SDT resources and / or the wireless bearer of the uplink data / signaling of the terminal device belongs to the second bearer set, then the target process is the second SDT process, wherein the second bearer set is a wireless bearer that allows triggering the second SDT process.

30. The terminal device according to claim 28, characterized in that If the terminal device meets the second trigger condition, and the reason for not meeting the first trigger condition includes reasons other than the following reasons: there are no valid SDT resources and / or the wireless bearer of the uplink data / signaling of the terminal device belongs to the second bearer set, then the target process is the RRC connection recovery process, wherein the second bearer set is a set of wireless bearers that allow triggering the second SDT process.

31. The terminal device according to claim 23, characterized in that If the terminal device does not meet the first trigger condition and the second trigger condition, the target process is the RRC connection recovery process.

32. The terminal device according to any one of claims 23 to 31, characterized in that: In a case where triggering of the first SDT process is permitted, the second triggering condition is determined based on one or more of the following: The SDT indication; The wireless link quality of the terminal device.

33. The terminal device according to claim 31, characterized in that The second trigger condition includes one or more of the following: receiving a first paging message, where the first paging message includes an identifier of the terminal device and / or the SDT indication; The downlink signal quality of the terminal device is greater than or equal to the second threshold.

34. The terminal device according to any one of claims 23 to 31, characterized in that: In a case where triggering of the first SDT process is not allowed, the second triggering condition is determined based on one or more of the following: The SDT indication; Bearing of uplink data of the terminal device; The amount of uplink data of the terminal device; Bearing of uplink signaling of the terminal device; wireless link quality of the terminal device; as well as Check whether there are valid SDT resources.

35. The terminal device according to claim 34, characterized in that The second trigger condition includes one or more of the following: receiving a first paging message, where the first paging message includes an identifier of the terminal device and / or the SDT indication; The radio bearer corresponding to the uplink data is a radio bearer that allows triggering SDT; The radio bearer corresponding to the uplink signaling is a radio bearer that allows triggering SDT; The amount of uplink data is less than or equal to a first threshold; The downlink signal quality of the terminal device is greater than or equal to a second threshold; A valid SDT resource exists.

36. The terminal device according to claim 35, characterized in that The second trigger condition also includes: the radio bearers of the uplink data / signaling of the terminal device all belong to a second bearer set, wherein the second bearer set is a radio bearer that allows triggering the second SDT process.

37. The terminal device according to claims 22-36, characterized in that: If triggering the first SDT process initiated by the terminal device is not allowed, the target process is: A second SDT process initiated by the network device; or The RRC connection recovery process.

38. The terminal device according to any one of claims 22 to 37, characterized in that: Whether to allow triggering the first SDT process triggered by the terminal device is determined based on one or more of the following: Whether the system message received by the terminal device includes information indicating the first category of resources; whether the radio resource release message received by the terminal device includes information indicating the second type of resources; whether the system message received by the terminal device includes a threshold associated with the first SDT process; and Second indication information received by the terminal device, where the second indication information is used to indicate whether the terminal device allows triggering the first process when receiving the SDT indication sent by the network device; The first type of resources are small data transmission RA-SDT resources based on random access, and the second type of resources are small data transmission CG-SDT resources based on configuration authorization.

39. The terminal device according to any one of claims 22 to 38, characterized in that: The SDT indication is carried in a paging message, and the time when the terminal device receives the paging message and the first request satisfies one of the following relationships: The terminal device receives the paging message and the first restoration request simultaneously; The terminal device first receives the paging message, and before determining to initiate the SDT process, receives the first request; The terminal device first receives the first request and receives the paging message before determining to initiate the SDT process or the RRC connection recovery process.

40. The terminal device according to any one of claims 22 to 39, characterized in that: If the target process is a second SDT process triggered by the network device, the uplink resources used for the first transmission of uplink data / signaling meet one of the following conditions: When the CG-SDT resource is valid, the uplink resource is the CG-SDT resource; when the CG-SDT resource is invalid and the RA-SDT resource is valid, the uplink resource is the RA-SDT resource; when both the CG-SDT resource and the RA-SDT resource are invalid, the uplink resource is the normal RACH resource; When the CG-SDT resource is valid, the uplink resource is the CG-SDT resource; when the CG-SDT resource is invalid, the uplink resource is the normal RACH resource; The uplink resource is the normal RACH resource.

41. A network device, characterized in that include: A second receiving unit is configured to receive first indication information sent by a terminal device if the first trigger condition and the second trigger condition are met; Among them, the first trigger condition corresponds to the first SDT process triggered by the terminal device, the second trigger condition corresponds to the second SDT process triggered by the network device, and the first indication information is used to indicate that the triggering reason of the SDT process is that both the first trigger condition and the second trigger condition are met.

42. The network device according to claim 41, wherein: The first indication information satisfies one of the following conditions: The first indication information includes a first restoration reason, where the first restoration reason is used to indicate that the terminal device meets the first trigger condition and the second trigger condition; The first indication information includes a second recovery reason. When the terminal device selects the resource corresponding to the first SDT process, the second recovery reason is used to indicate that the terminal device meets the second trigger condition. When the terminal device selects the resource corresponding to the second SDT process, the second recovery reason is used to indicate that the terminal device meets the first trigger condition. The first indication information includes a third restoration reason and a fourth restoration reason, the third restoration reason is used to indicate that the terminal device meets the first trigger condition, and the fourth restoration reason is used to indicate that the terminal device meets the second trigger condition; If the SDT process is the first SDT process, the first indication information is used to indicate that the terminal device meets the second trigger condition; if the SDT process is the second SDT process, the first indication information is used to indicate that the terminal device meets the first trigger condition.

43. A terminal device, characterized in that: The terminal comprises a transceiver, a memory and a processor, wherein the memory is used to store a program, and the processor is used to call the program in the memory and control the transceiver to receive or send a signal, so that the terminal executes the method according to any one of claims 1 to 19.

44. A network device, characterized in that It includes a transceiver, a memory and a processor, the memory is used to store programs, the processor is used to call the programs in the memory and control the transceiver to receive or send signals so that the network device executes the method as described in any one of claims 20-21.

45. A device, characterized in that The device comprises a processor configured to call a program from a memory so as to enable the device to execute the method according to any one of claims 1 to 21.

46. ​​A chip, characterized in that The device comprises a processor configured to call a program from a memory so that a device equipped with the chip executes the method according to any one of claims 1 to 21.

47. A computer-readable storage medium, characterized in that A program is stored thereon, and the program causes a computer to execute the method according to any one of claims 1 to 21.

48. A computer program product, characterized in that The method comprises a program for causing a computer to execute the method according to any one of claims 1 to 21.

49. A computer program, characterized in that The computer program causes a computer to execute the method according to any one of claims 1 to 21.

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