WO2023133794A1 - Data transmission method, terminal device and network device - Google Patents

Abstract

The present application relates to a data transmission method, a terminal device and a network device. The data transmission method comprises: a terminal device performs data transmission according to radio bearers to which uplink data belongs and/or the amount of data. The present application can solve the transmission problem of the subsequently arrived uplink SDT data in the data transmission process.

Description

Data transmission method, terminal device and network device technical field

The present application relates to the communication field, and more specifically, to a data transmission method, a terminal device and a network device.

Background technique

In the 5G (NR, NR Radio Access) system, small data transmission (SDT, Small Data Transmission) is introduced. During this process, the terminal may use RRC_IDLE (RRC idle state) or RRC_INACTIVE (RRC inactive state) to complete the transmission of uplink/downlink small data packets. SDT is divided into small data transmission initiated by the terminal (MO-SDT, Mobile Originated Small Data Transmission) and small data transmission initiated by the network (MT-SDT, Mobile Terminated Small Data Transmission). During the data transmission process, how to process the subsequent uplink SDT data has become a technical problem to be solved.

Contents of the invention

Embodiments of the present application provide a data transmission method, terminal equipment, and network equipment, which can solve the transmission problem of subsequent uplink SDT data arriving during the data transmission process.

An embodiment of the present application provides a data transmission method, including:

The terminal device performs data transmission according to the radio bearer and/or data volume to which the uplink data belongs.

An embodiment of the present application provides a data transmission method, including:

The network device sends a first message, where the first message is used to configure a first radio bearer set and a second radio bearer set; wherein, the first radio bearer set includes at least one radio bearer that is allowed to trigger MT-SDT, and the second radio bearer set Include at least one radio bearer that allows triggering of MO-SDT.

An embodiment of the present application provides a terminal device, including:

The data transmission module is configured to perform data transmission according to the radio bearer and/or data volume to which the uplink data belongs.

An embodiment of the present application provides a network device, including:

The first sending module is configured to send a first message, where the first message is used to configure a first radio bearer set and a second radio bearer set; wherein the first radio bearer set includes at least one radio bearer that is allowed to trigger MT-SDT, The second set of radio bearers includes at least one radio bearer that is allowed to trigger MO-SDT.

An embodiment of the present application provides a terminal device, including a processor and a memory. The memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory, so that the terminal device executes the above data transmission method.

An embodiment of the present application provides a network device, including a processor and a memory. The memory is used to store computer programs, and the processor is used to invoke and run the computer programs stored in the memory, so that the network device executes the above data transmission method.

An embodiment of the present application provides a chip configured to implement the above data transmission method.

Specifically, the chip includes: a processor, configured to call and run a computer program from the memory, so that the device installed with the chip executes the above-mentioned data transmission method.

An embodiment of the present application provides a computer-readable storage medium, which is used to store a computer program, and when the computer program is run by a device, the device executes the above-mentioned data transmission method.

An embodiment of the present application provides a computer program product, including computer program instructions, where the computer program instructions cause a computer to execute the above data transmission method.

An embodiment of the present application provides a computer program that, when running on a computer, causes the computer to execute the above data transmission method.

In the embodiment of the present application, the terminal device performs data transmission according to the radio bearer and/or data volume to which the uplink data belongs, so as to solve the transmission problem of subsequent uplink SDT data arriving during the data transmission process.

Description of drawings

Fig. 1 is a schematic diagram of an application scenario according to an embodiment of the present application.

Fig. 2 is a schematic flowchart of a data transmission method 200 according to an embodiment of the present application.

FIG. 3 is an implementation flowchart according to Embodiment 1 of the present application.

FIG. 4 is an implementation flowchart according to Embodiment 2 of the present application.

Fig. 5 is a schematic flowchart of a data transmission method 500 according to an embodiment of the present application.

Fig. 6 is a schematic block diagram of a terminal device 600 according to an embodiment of the present application.

Fig. 7 is a schematic block diagram of a terminal device 700 according to an embodiment of the present application.

Fig. 8 is a schematic block diagram of a network device 800 according to an embodiment of the present application.

Fig. 9 is a schematic block diagram of a network device 900 according to an embodiment of the present application.

Fig. 10 is a schematic block diagram of a communication device 1000 according to an embodiment of the present application.

Fig. 11 is a schematic block diagram of a chip according to an embodiment of the present application.

Fig. 12 is a schematic block diagram of a communication system according to an embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.

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

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

In a possible implementation manner, the communication system in the embodiment of the present application may be applied to a carrier aggregation (Carrier Aggregation, CA) scenario, may also be applied to a dual connectivity (Dual Connectivity, DC) scenario, and may also be applied to an independent ( Standalone, SA) network deployment scene.

In a possible implementation, the communication system in the embodiment of the present application can be applied to an unlicensed spectrum, where the unlicensed spectrum can also be considered as a shared spectrum; or, the communication system in the embodiment of the present application can also be applied to Licensed spectrum, where the licensed spectrum can also be considered as non-shared spectrum.

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

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

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

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

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

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

As an example but not a limitation, in this embodiment of the present application, the network device may have a mobile feature, for example, the network device may be a mobile device. Optionally, the network equipment may be a satellite or a balloon station. For example, the satellite can be a low earth orbit (low earth orbit, LEO) satellite, a medium earth orbit (medium earth orbit, MEO) satellite, a geosynchronous earth orbit (geosynchronous earth orbit, GEO) satellite, a high elliptical orbit (High Elliptical Orbit, HEO) satellite. ) Satellite etc. Optionally, the network device may also be a base station installed on land, water, and other locations.

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

FIG. 1 exemplarily shows a communication system 100 . The communication system includes a network device 110 and two terminal devices 120 . In a possible implementation manner, the communication system 100 may include multiple network devices 110, and each network device 110 may include other numbers of terminal devices 120 within the coverage area, which is not limited in this embodiment of the present application.

In a possible implementation manner, the communication system 100 may also include other network entities such as a mobility management entity (Mobility Management Entity, MME), an access and mobility management function (Access and Mobility Management Function, AMF), etc. The embodiment of the application does not limit this.

Wherein, the network equipment may further include access network equipment and core network equipment. That is, the wireless communication system also includes multiple core networks for communicating with access network devices. The access network device may be a long-term evolution (long-term evolution, LTE) system, a next-generation (mobile communication system) (next radio, NR) system or an authorized auxiliary access long-term evolution (LAA- The evolved base station (evolutional node B, referred to as eNB or e-NodeB) in the LTE) system is a macro base station, a micro base station (also called a "small base station"), a pico base station, an access point (access point, AP), Transmission point (transmission point, TP) or new generation base station (new generation Node B, gNodeB), etc.

It should be understood that a device with a communication function in the network/system in the embodiment of the present application may be referred to as a communication device. Taking the communication system shown in Figure 1 as an example, the communication equipment may include network equipment and terminal equipment with communication functions. It may include other devices in the communication system, such as network controllers, mobility management entities and other network entities, which are not limited in this embodiment of the present application.

It should be understood that the terms "system" and "network" are often used interchangeably herein. The term "and/or" in this article is just an association relationship describing associated objects, which means that there can be three relationships, for example, A and/or B can mean: A exists alone, A and B exist simultaneously, and there exists alone B these three situations. In addition, the character "/" in this article generally indicates that the contextual objects are an "or" relationship.

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

In the description of the embodiments of the present application, the term "corresponding" may indicate that there is a direct or indirect correspondence between the two, or that there is an association between the two, or that it indicates and is indicated, configuration and is configuration etc.

In order to facilitate the understanding of the technical solutions of the embodiments of the present application, the related technologies of the embodiments of the present application are described below. The following related technologies can be combined with the technical solutions of the embodiments of the present application as optional solutions, and all of them belong to the embodiments of the present application. protected range.

1. EDT:

In LTE, EDT (early data transmission) has been introduced, that is, small data transmission. During this process, UE may always remain in idle (idle) state or suspend (suspend) state or inactive (inactive) state, complete Uplink and/or downlink transmission of small data packets. EDT is divided into small data transmission initiated by the terminal (MO-EDT, Mobile Originated Early Data Transmission) and small data transmission initiated by the network (MT-EDT, Mobile Terminated Early Data Transmission). The difference between the two is whether the EDT is triggered by the terminal or the network. .

MO-EDT is an EDT process initiated by the terminal. The network includes the maximum transport block size (TB size, Transport Block size) that MO-EDT allows transmission in the system broadcast message. The terminal judges the amount of data to be transmitted. If it is smaller than the maximum broadcasted TB size, the UE initiates the EDT process; otherwise, the terminal initiates the normal connection establishment process and enters the connection state to transmit data. MO-EDT is based on the random access process, and the terminal uses the UL grant obtained in the RAR to transmit uplink data. The network allocates random access resources dedicated to MO-EDT for the terminal to distinguish whether the current random access process is triggered by MO-EDT, so as to allocate a larger size UL grant through RAR for data transmission.

MT-EDT is an EDT process initiated by the network (specifically, (MME). When the downlink data for a certain terminal reaches the Serving Gateway (S-GW, Serving GateWay), the S-GW informs the MME of the data volume information, and through the MME Instruct the base station to initiate paging (paging) to find the target terminal. After receiving the paging message, the target terminal confirms whether the corresponding terminal identification and MT-EDT indication are included. If yes, the terminal initiates the MO-EDT process and responds to the network side paging.

The MO-EDT initiated during the MT-EDT process is different from the normal MO-EDT in the following ways:

- The terminal uses legacy RACH resources to initiate random access, that is, does not use random access resources dedicated to MO-EDT;

-ResumeCause is mt-EDT, which is used to inform the network of the current purpose of initiating connection establishment;

- The base station side can further determine whether to instruct the terminal to enter the connection state through the pending data indication (Pending Data Indication) sent by the core network; wherein, the pending data indication is used to inform the base station whether there is further downlink data transmission demand.

During the EDT process, only one uplink/downlink data transmission is supported.

2. SDT:

In the 5G NR system, the RRC state of the terminal is divided into three types, namely: RRC_IDLE (RRC idle state), RRC_INACTIVE (RRC inactive state), RRC_CONNECTED (RRC connected state). The RRC_INACTIVE state is a new state introduced by the 5G system from the perspective of energy saving. For the UE in the RRC_INACTIVE state, the radio bearer and all radio resources will be released, but the UE side and the base station side retain the UE access context to quickly restore the RRC connection. Typically, UEs with infrequent data transmission are kept in the RRC_INACTIVE state. At present, research on Small Data Transmission (SDT) under RRC_INACTIVE has appeared in related technologies, and there are mainly two directions: uplink small data transmission based on random access process (two-step/four-step) (hereinafter referred to as RA -SDT) and uplink small data transmission based on pre-configured resources (such as (CG type1,)) (hereinafter referred to as CG-SDT). At present, related technologies are mainly aimed at MO, that is, the SDT process triggered by the arrival of uplink data.

For a UE in the RRC_INACTIVE state, SDT is triggered when the following conditions are met:

- The data to be transmitted comes from radio bearers that can trigger SDT, such as SRB, DRB

-The amount of 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;

- there is a valid SDT resource, e.g. RA-SDT resource and/or CG-SDT resource;

The recovery of the terminal can trigger the SDT radio bearer to support the subsequent uplink and downlink data transmission process.

In related technologies, only MO-SDT, that is, the SDT process initiated by the terminal, is discussed, and how to process subsequent uplink SDT data in the MT-SDT process is not involved.

Fig. 2 is a schematic flowchart of a data transmission method 200 according to an embodiment of the present application. The method can optionally be applied to the system shown in Fig. 1, but is not limited thereto. The method includes at least some of the following.

S210. The terminal device performs data transmission according to the radio bearer to which the uplink data belongs and/or the data volume.

In an implementation manner, before step S210, it may further include: the terminal device receives a first message, and the first message is used to configure the first radio bearer set and the second radio bearer set; At least one radio bearer for MT-SDT, the second radio bearer set includes at least one radio bearer that is allowed to trigger MO-SDT.

The first message may be sent by the network to the terminal device, and is used to configure the first radio bearer set and the second radio bearer set of the terminal device; wherein, the radio bearers in the first radio bearer set are allowed to trigger MT-SDT, Radio bearers in the second radio bearer set are allowed to trigger MO-SDT, and radio bearers that belong to neither the first radio bearer set nor the second radio bearer set are not allowed to trigger MT-SDT and/or MO-SDT. In some implementation manners, there may be an intersection between the first radio bearer set and the second radio bearer set, or there may be no intersection between the first radio bearer set and the second radio bearer set. A terminal device in the RRC_CONNECTED state and/or the RRC_INACTIVE state can receive the first message sent by the network.

In one embodiment, before step S210 may also include:

The end device receives the paging message;

The terminal device initiates an MT-SDT process, and restores radio bearers in the first radio bearer set.

In the above paging message, it may at least include a terminal identity, such as an inactive radio network temporary identity (I-RNTI, Inactive-Radio Network Tempory Identity), MT-SDT indication, and the like. The paging message may be sent by the cell where the terminal device currently resides, and the terminal device may be in the RRC_INACTIVE state when receiving the paging message.

Through the above steps, the terminal device enters the MT-SDT process. During the MT-SDT process, if there is uplink data arriving, step S210 may be performed, that is, data transmission is performed according to the radio bearer and/or data volume to which the uplink data belongs.

In an implementation manner, the manner in which the terminal device performs data transmission according to the radio bearer and/or data volume to which the uplink data belongs includes:

When all or part of the radio bearer to which the uplink data belongs is not included in the first radio bearer set, the terminal device generates and sends a first indication message, where the first indication message indicates that the terminal device has uplink data to be transmitted; wherein , the first radio bearer set includes at least one radio bearer that is allowed to trigger MT-SDT.

It can be seen that in the above method, data transmission from the MO-SDT radio bearer is not supported during the MT-SDT process. Therefore, after the terminal device enters the MT-SDT process, if the radio bearers to which the subsequent uplink data arrives belong to are all included in the first radio bearer set (that is, the radio bearer set that is allowed to trigger MT-SDT), the uplink data can be for normal transfer. Otherwise (that is, the radio bearers to which uplink data arrives subsequently are not all included in the first radio bearer set), the terminal device sends a first indication message to inform the network side that the terminal device has uplink data to be transmitted.

Wherein, the situation that the radio bearers to which the subsequently arriving uplink data belongs are not all included in the first radio bearer set includes at least one of the following:

The radio bearer to which the uplink data belongs is wholly or partially included in the second radio bearer set;

All or part of the radio bearer to which the uplink data belongs is not included in the first radio bearer set and the second radio bearer set.

In another implementation manner, the manner in which the terminal device performs data transmission according to the radio bearer and/or data volume to which the uplink data belongs includes:

When the first condition is met, the terminal device restores the radio bearer in the second radio bearer set, and sends the uplink data;

Wherein, the first condition includes at least one of the following:

All radio bearers to which the uplink data belongs are included in the second radio bearer set;

The data volume of the uplink data does not exceed the data volume threshold;

The downlink reference signal receiving power of the terminal device is not lower than a reference signal receiving power (RSRP, Reference Signal Receiving Power) threshold.

In another implementation manner, the manner in which the terminal device performs data transmission according to the radio bearer and/or data volume to which the uplink data belongs includes:

When all or part of the radio bearer to which the uplink data belongs is not included in the first radio bearer set and does not meet the first condition, the terminal device generates and sends a first indication message, and the first indication message indicates that the terminal device has a pending transmitted uplink data;

Wherein, the first condition includes at least one of the following:

All radio bearers to which the uplink data belongs are included in the second radio bearer set;

The data volume of the uplink data does not exceed the data volume threshold;

The downlink reference signal received power of the terminal device is not lower than the RSRP threshold;

It can be seen that in the above manner, during the MT-SDT process, when certain conditions are met, data transmission from the MO-SDT radio bearer can be supported. After the terminal device enters the MT-SDT process, if the radio bearers to which the subsequent uplink data arrives are all included in the first radio bearer set (that is, the radio bearer set that is allowed to trigger MT-SDT), the uplink data can be processed normally. transmission. If the radio bearers to which the subsequently arriving uplink data belong are not all included in the first radio bearer set, the terminal device can judge whether the first condition is satisfied, and if so, restore the radio bearers in the second radio bearer set, and send the Uplink data (that is, support data transmission from the MO-SDT radio bearer); if not satisfied, generate and send a first indication message to inform the network side that the terminal device has uplink data to be transmitted (that is, does not support data transmission from the MO-SDT radio bearer); data transmission over SDT radio bearers).

In the above implementation method, the first indication message may be at least one of uplink control information (UCI, Uplink Control Information), media access control (MAC, Medium Access Control) control element (CE, Control Element) and RRC message .

In the above implementation manners, the data volume threshold and/or the RSRP threshold may be received by the terminal device in advance. For example, the terminal device receives a system broadcast message and/or UE-specific signaling, and the system broadcast message and/or user equipment UE-specific signaling carries at least one of the data volume threshold and the RSRP threshold.

Referring to the accompanying drawings, specific embodiments will be described in detail below.

Embodiment 1: In the MT-SDT process, the data transmission from the MO-SDT radio bearer is not supported.

Fig. 3 is the implementation flow chart according to Embodiment 1 of the present application, including:

S301: A UE in an RRC_CONNECTED state and/or an RRC_INACTIVE state receives a first message sent by a network, where the first message at least includes: a first radio bearer set and/or a second radio bearer set. Wherein, the first radio bearer set is used to configure one or more radio bearers that are allowed to trigger MT-SDT, and the second radio bearer set is used to configure one or more radio bearers that are allowed to trigger MO-SDT.

S302: The terminal in the RRC_INACTVIE state receives a paging message sent by the cell it is currently camping on, wherein the paging message at least includes: a terminal identifier, such as I-RNTI; and an MT-SDT indication.

S303: The terminal initiates an MT-SDT process to recover radio bearers in the first radio bearer set.

S304: During the MT-SDT process, uplink data arrives at the terminal. Wherein, all/part of the radio bearer to which the uplink data belongs is included in the second radio bearer set, and/or, the radio bearer to which the uplink data belongs is not included in the first radio bearer set and the second radio bearer set (eg , neither included in the first radio bearer set nor in the second radio bearer set). In this case, the terminal generates a first indication message, where the first indication message is used to indicate that there is uplink data to be transmitted at the terminal side. The radio bearer to which the uplink data to be transmitted belongs has not been recovered, so normal transmission cannot be performed under the current situation. The first indication message may be one of UCI/MAC CE/RRC messages.

S305: The terminal includes the first indication message in a subsequent (subsequent) uplink transmission in the current SDT process.

It can be seen that in this embodiment, the terminal device does not support data transmission from the MO-SDT radio bearer during the MT-SDT process. If the uplink data arrives during the MT-SDT process, and the radio bearers mentioned in the uplink data are all included in the first radio bearer set, the terminal can perform normal data transmission. Otherwise, the terminal generates a first indication message, which is used to indicate that there is uplink data to be transmitted on the terminal side.

Embodiment 2: During the MT-SDT process, when certain conditions are met, data transmission from the MO-SDT radio bearer is supported.

Figure 4 is an implementation flow chart according to Embodiment 2 of the present application, including:

S401: The UE in the RRC_CONNECTED state and/or the RRC_INACTIVE state receives a first message sent by the network, where the first message at least includes: a first radio bearer set and/or a second radio bearer set. Wherein, the first radio bearer set is used to configure one or more radio bearers that are allowed to trigger MT-SDT, and the second radio bearer set is used to configure one or more radio bearers that are allowed to trigger MO-SDT.

S402: The terminal in the RRC_INACTVIE state receives a paging message sent by the cell where it currently resides, wherein the paging message at least includes: a terminal identifier, such as I-RNTI; and an MT-SDT indication.

S403: The terminal initiates an MT-SDT process to recover radio bearers in the first radio bearer set.

S404: During the MT-SDT process, uplink data arrives at the terminal. Wherein, all/part of the radio bearers to which the uplink data belongs are not included in the first line bearer set. The terminal device judges whether the uplink data meets a first condition, where the first condition at least includes:

a) all radio bearers to which the uplink data belongs are included in the second radio bearer set;

b) The data volume of the uplink data does not exceed the data volume threshold; the data volume threshold is configured by the network, for example, included in the system broadcast message and/or UE-specific signaling;

c) The received power of the downlink reference signal of the terminal is not lower than the RSRP threshold. The RSRP threshold can be configured by the network, for example, included in a system broadcast message and/or UE-specific signaling.

If the judgment result is that the first condition is satisfied, the terminal resumes the radio bearer in the second radio bearer set in the suspended state, and sends the uplink data to the network; if the judgment result is that the first condition is not satisfied, the terminal generates a first indication message, where the first indication message is used to indicate that there is uplink data to be transmitted at the terminal side. The radio bearer to which the uplink data to be transmitted belongs has not been recovered, so normal transmission cannot be performed under the current situation.

In this embodiment, all/part of the radio bearers to which the uplink data arriving during the MT-SDT process are not included in the first line bearer set, under this premise, the terminal device judges whether the uplink data meets the first condition. If the radio bearers to which the uplink data arrives during the MT-SDT process are all included in the first-line bearer set, normal data transmission can be performed.

To sum up, the data transmission method proposed in the embodiment of the present application solves how to process subsequent uplink SDT data arriving in the MT-SDT process. Include at least the following two schemes: Scheme 1, in the MT-SDT process, if there is data from MO-SDT-Radio Bearer (RB, Radio Bear), the terminal generates and sends an indication message to the network to inform the network side The terminal device has uplink data to be transmitted. Solution 2: During the MT-SDT process, if there is data from the MO-SDT-RB, the terminal judges whether the first condition is met; if it is satisfied, the terminal executes the data on the MO-SDT-RB during the MT-SDT process transmission; if not satisfied, the terminal generates and sends an indication message to the network to inform the network side that the terminal device has uplink data to be transmitted.

The embodiment of the present application also proposes a data transmission method. FIG. 5 is a schematic flowchart of a data transmission method 500 according to an embodiment of the present application. The data transmission method can optionally be applied to the system shown in FIG. 1, as Used in the network equipment in the system shown in Figure 1, but not limited thereto. The method includes at least some of the following.

S510. The network device sends a first message, where the first message is used to configure a first radio bearer set and a second radio bearer set; where the first radio bearer set includes at least one radio bearer that is allowed to trigger MT-SDT, and the second radio bearer The bearer set includes at least one radio bearer that is allowed to trigger MO-SDT.

Through the above process, the network device can configure the first radio bearer set and the second radio bearer set for the terminal device. The radio bearers in the first radio bearer set are allowed to trigger MT-SDT, the radio bearers in the second radio bearer set are allowed to trigger MO-SDT, and the radio bearers that neither belong to the first radio bearer set nor the second radio bearer set The bearer is not allowed to trigger MT-SDT and/or MO-SDT. In some implementation manners, there may be an intersection between the first radio bearer set and the second radio bearer set, or there may be no intersection between the first radio bearer set and the second radio bearer set.

In some implementation manners, the above data transmission method may further include: the network device sends at least one of a data volume threshold and an RSRP threshold.

The network device may send at least one of the data volume threshold and the RSRP threshold to the terminal device, so that the terminal device uses the data volume threshold, the RSRP threshold, and the radio bearer and data volume to which the uplink data arriving from the terminal device belongs, to determine whether to meet the requirements of the process. MO-SDT transmission conditions (such as the first condition above), and when the conditions are met, data transmission from the MO-SDT radio bearer is performed.

For a specific example of the method 500 executed by the network device in this embodiment, reference may be made to the related descriptions about the network device such as the base station in the method 200 above, and details are not repeated here for brevity.

Fig. 6 is a schematic block diagram of a terminal device 600 according to an embodiment of the present application. The terminal device 600 may include:

The data transmission module 610 is configured to perform data transmission according to the radio bearer to which the uplink data belongs and/or the data volume.

Fig. 7 is a schematic block diagram of a terminal device 700 according to an embodiment of the present application. The terminal device 700 may include:

The data transmission module 610, the first receiving module 720, the second receiving module 730, and the sending module 740, wherein the data transmission module 610 is the same as the above-mentioned corresponding modules, and will not be repeated here.

In one embodiment, the data transmission module 610 is configured to generate and send a first indication message when all or part of the radio bearer to which the uplink data belongs is not included in the first radio bearer set, and the first indication The message indicates that the terminal device has uplink data to be transmitted; the first radio bearer set includes at least one radio bearer that is allowed to trigger MT-SDT.

In an implementation manner, the situation that all or part of the radio bearers to which the uplink data belongs is not included in the first radio bearer set includes at least one of the following:

The radio bearers to which the uplink data belongs are all or partly included in the second radio bearer set;

All or part of the radio bearers to which the uplink data belongs are not included in the first radio bearer set and the second radio bearer set; wherein, the second radio bearer set includes at least one radio bearer that is allowed to trigger MO-SDT.

In an implementation manner, the data transmission module 610 is configured to: restore the radio bearers in the second radio bearer set and send the uplink data when the first condition is met;

The second radio bearer set includes at least one radio bearer that is allowed to trigger MO-SDT;

The first condition includes at least one of the following:

All radio bearers to which the uplink data belongs are included in the second radio bearer set;

The data volume of the uplink data does not exceed the data volume threshold;

The received power of the downlink reference signal of the terminal device is not lower than the RSRP threshold.

In one embodiment, the above-mentioned data transmission module 610 is configured to: generate and send the first radio bearer when all or part of the radio bearer to which the uplink data belongs is not included in the first radio bearer set and does not meet the first condition An indication message, the first indication message indicates that the terminal device has uplink data to be transmitted;

The first condition includes at least one of the following:

All radio bearers to which the uplink data belongs are included in the second radio bearer set;

The data volume of the uplink data does not exceed the data volume threshold;

The downlink reference signal received power of the terminal device is not lower than the RSRP threshold;

Wherein, the first radio bearer set includes at least one radio bearer that is allowed to trigger MT-SDT, and the second radio bearer set includes at least one radio bearer that is allowed to trigger MO-SDT.

In one embodiment, the above-mentioned first receiving module 720 is configured to: receive a system broadcast message and/or UE-specific signaling, the system broadcast message and/or UE-specific signaling carrying the data amount threshold and the at least one of the above RSRP thresholds.

In an implementation manner, the first indication message is at least one of uplink control information UCI, medium access control MAC control element CE and radio resource control RRC message.

In one embodiment, the second receiving module 730 is configured to: receive a first message, the first message is used to configure the first radio bearer set and the second radio bearer set; wherein the first radio bearer set It includes at least one radio bearer that allows triggering of MT-SDT, and the second radio bearer set includes at least one radio bearer that allows triggering of MO-SDT.

In one implementation manner, the above-mentioned initiating module 740 is configured to: receive a paging message; initiate an MT-SDT process, and restore radio bearers in the first radio bearer set.

The terminal device 600 and the terminal device 700 in this embodiment of the present application can implement the corresponding functions of the terminal devices in the foregoing method embodiments. For the processes, functions, implementations, and beneficial effects corresponding to each module (submodule, unit, or component, etc.) in the terminal device 600 and the terminal device 700, refer to the corresponding descriptions in the above method embodiments, and details are not repeated here. It should be noted that the functions described by the modules (submodules, units or components, etc.) in the terminal device 600 and the terminal device 700 in the embodiment of the application may be implemented by different modules (submodules, units or components, etc.), or Can be realized by the same module (submodule, unit or component, etc.).

Fig. 8 is a schematic block diagram of a network device 800 according to an embodiment of the present application. The network device 800 may include:

The first sending module 810 is configured to send a first message, where the first message is used to configure a first radio bearer set and a second radio bearer set; wherein, the first radio bearer set includes at least the A radio bearer, the second radio bearer set includes at least one radio bearer that is allowed to trigger MO-SDT.

Fig. 9 is a schematic block diagram of a network device 900 according to an embodiment of the present application. The network device 900 may include:

The first sending module 810 and the second sending module 920, wherein the first sending module 810 is the same as the above-mentioned corresponding module, and will not be repeated here.

In one embodiment, the second sending module 920 is configured to: send at least one of the data amount threshold and the RSRP threshold,

In one embodiment, the second sending module 920 is configured to: send a broadcast message and/or UE-specific signaling, where the system broadcast message and/or UE-specific signaling carries at least one of the data volume threshold and the RSRP threshold one item.

The network device 800 and the network device 900 in this embodiment of the present application can implement the corresponding functions of the network devices in the foregoing method embodiments. For the procedures, functions, implementations and beneficial effects corresponding to each module (submodule, unit or component, etc.) in the network device 800 and the network device 900 , refer to the corresponding descriptions in the above method embodiments, and details are not repeated here. It should be noted that the functions described by the various modules (submodules, units or components, etc.) in the network device 800 and network device 900 in the embodiment of the application can be realized by different modules (submodules, units or components, etc.), and also Can be realized by the same module (submodule, unit or component, etc.).

Fig. 10 is a schematic structural diagram of a communication device 1000 according to an embodiment of the present application. The communication device 1000 includes a processor 1010, and the processor 1010 can invoke and run a computer program from a memory, so that the communication device 1000 implements the method in the embodiment of the present application.

In a possible implementation manner, the communication device 1000 may further include a memory 1020 . Wherein, the processor 1010 may call and run a computer program from the memory 1020, so that the communication device 1000 implements the method in the embodiment of the present application.

Wherein, the memory 1020 may be an independent device independent of the processor 1010 , or may be integrated in the processor 1010 .

In a possible implementation, the communication device 1000 may further include a transceiver 1030, and the processor 1010 may control the transceiver 1030 to communicate with other devices, specifically, to send information or data to other devices, or to receive information from other devices information or data sent.

Wherein, the transceiver 1030 may include a transmitter and a receiver. The transceiver 1030 may further include antennas, and the number of antennas may be one or more.

In a possible implementation manner, the communication device 1000 may be the network device of the embodiment of the present application, and the communication device 1000 may implement the corresponding processes implemented by the network device in each method of the embodiment of the present application. For the sake of brevity, the This will not be repeated here.

In a possible implementation manner, the communication device 1000 may be a terminal device in the embodiment of the present application, and the communication device 1000 may implement the corresponding processes implemented by the terminal device in each method of the embodiment of the present application. For the sake of brevity, the This will not be repeated here.

FIG. 11 is a schematic structural diagram of a chip 1100 according to an embodiment of the present application. The chip 1100 includes a processor 1110, and the processor 1110 can invoke and run a computer program from a memory, so as to implement the method in the embodiment of the present application.

In a possible implementation manner, the chip 1100 may further include a memory 1120 . Wherein, the processor 1110 may call and run a computer program from the memory 1120, so as to implement the method executed by the terminal device or the network device in the embodiment of the present application.

Wherein, the memory 1120 may be an independent device independent of the processor 1110 , or may be integrated in the processor 1110 .

In a possible implementation manner, the chip 1100 may further include an input interface 1130 . Wherein, the processor 1110 can control the input interface 1130 to communicate with other devices or chips, specifically, can obtain information or data sent by other devices or chips.

In a possible implementation manner, the chip 1100 may further include an output interface 1140 . Wherein, the processor 1110 can control the output interface 1140 to communicate with other devices or chips, specifically, can output information or data to other devices or chips.

In a possible implementation, the chip can be applied to the network device in the embodiment of the application, and the chip can implement the corresponding processes implemented by the network device in the methods of the embodiment of the application. For the sake of brevity, the Let me repeat.

In a possible implementation, the chip can be applied to the terminal device in the embodiment of the present application, and the chip can implement the corresponding process implemented by the terminal device in each method of the embodiment of the present application. For the sake of brevity, the Let me repeat.

Chips applied to network devices and terminal devices may be the same chip or different chips.

It should be understood that the chip mentioned in the embodiment of the present application may also be called a system-on-chip, a system-on-chip, a system-on-a-chip, or a system-on-a-chip.

The processor mentioned above can be a general-purpose processor, a digital signal processor (DSP), an off-the-shelf programmable gate array (FPGA), an application specific integrated circuit (ASIC) or Other programmable logic devices, transistor logic devices, discrete hardware components, etc. Wherein, the general-purpose processor mentioned above may be a microprocessor or any conventional processor or the like.

The aforementioned memories may be volatile memories or nonvolatile memories, or may include both volatile and nonvolatile memories. Among them, the non-volatile memory can be read-only memory (read-only memory, ROM), programmable read-only memory (programmable ROM, PROM), erasable programmable read-only memory (erasable PROM, EPROM), electrically programmable Erases programmable read-only memory (electrically EPROM, EEPROM) or flash memory. The volatile memory may be random access memory (RAM).

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

Fig. 12 is a schematic block diagram of a communication system 1200 according to an embodiment of the present application. The communication system 800 includes a terminal device 1210 and a network device 1220 .

Wherein, the terminal device 1210 may be used to realize the corresponding functions realized by the terminal device in the above method, and the network device 1220 may be used to realize the corresponding functions realized by the network device in the above method. For the sake of brevity, details are not repeated here.

In the above embodiments, all or part of them may be implemented by software, hardware, firmware or any combination thereof. When implemented using software, it may 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 the computer, the processes or functions according to the embodiments of the present application will be 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 may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, e.g. (such as coaxial cable, optical fiber, digital subscriber line (Digital Subscriber Line, DSL)) or wireless (such as infrared, wireless, microwave, etc.) to another website site, computer, server or data center. The computer-readable storage medium may be any available medium that can be accessed by a computer, or a data storage device such as a server or a data center integrated with one or more available media. The available medium may be a magnetic medium (such as a floppy disk, a hard disk, or a magnetic tape), an optical medium (such as a DVD), or a semiconductor medium (such as a solid state disk (Solid State Disk, SSD)), etc.

It should be understood that, in various embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the order of execution, and the execution order of the processes should be determined by their functions and internal logic, and should not be used in the embodiments of the present application. The implementation process constitutes any limitation.

Those skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the above-described system, device and unit can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

The above is only the specific implementation of the application, but the scope of protection of the application is not limited thereto. Anyone familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the application, and should covered within the scope of protection of this application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims (35)

A data transmission method comprising: The terminal device performs data transmission according to the radio bearer and/or data volume to which the uplink data belongs. The method according to claim 1, wherein the terminal device performs data transmission according to the radio bearer and/or data volume to which the uplink data belongs, including: When all or part of the radio bearer to which the uplink data belongs is not included in the first radio bearer set, the terminal device generates and sends a first indication message, and the first indication message indicates that the terminal device has a Uplink data: the first radio bearer set includes at least one radio bearer that is allowed to trigger a network-initiated small data transmission MT-SDT. The method according to claim 2, wherein the situation that all or part of the radio bearers to which the uplink data belongs is not included in the first radio bearer set includes at least one of the following: All or part of the radio bearers to which the uplink data belongs are included in the second radio bearer set; All or part of the radio bearer to which the uplink data belongs is not included in the first radio bearer set and the second radio bearer set; wherein, the second radio bearer set includes at least A radio bearer. The method according to claim 1, wherein the terminal device performs data transmission according to the radio bearer and/or data volume to which the uplink data belongs, including: When the first condition is met, the terminal device recovers the radio bearers in the second radio bearer set, and sends the uplink data; The second radio bearer set includes at least one radio bearer that is allowed to trigger MO-SDT; The first condition includes at least one of the following: All radio bearers to which the uplink data belongs are included in the second radio bearer set; The data volume of the uplink data does not exceed the data volume threshold; The downlink reference signal received power of the terminal device is not lower than the reference signal received power RSRP threshold. The method according to claim 1, wherein the terminal device performs data transmission according to the radio bearer and/or data volume to which the uplink data belongs, including: When all or part of the radio bearer to which the uplink data belongs is not included in the first radio bearer set and does not meet the first condition, the terminal device generates and sends a first indication message, and the first indication message indicates The terminal device has uplink data to be transmitted; The first condition includes at least one of the following: All radio bearers to which the uplink data belongs are included in the second radio bearer set; The data volume of the uplink data does not exceed the data volume threshold; The downlink reference signal received power of the terminal device is not lower than the RSRP threshold; Wherein, the first radio bearer set includes at least one radio bearer that is allowed to trigger MT-SDT, and the second radio bearer set includes at least one radio bearer that is allowed to trigger MO-SDT. The method according to claim 4 or 5, further comprising: The terminal device receives a system broadcast message and/or UE-specific signaling, where the system broadcast message and/or UE-specific signaling carries at least one of the data volume threshold and the RSRP threshold. The method according to claim 2, 3 or 5, wherein the first indication message is at least one of uplink control information UCI, medium access control MAC control element CE and radio resource control RRC message. The method according to any one of claims 1 to 7, further comprising: The terminal device receives a first message, where the first message is used to configure a first radio bearer set and a second radio bearer set; wherein the first radio bearer set includes at least one radio bearer that is allowed to trigger MT-SDT, The second radio bearer set includes at least one radio bearer that is allowed to trigger MO-SDT. The method of claim 8, further comprising: The terminal device receives a paging message; The terminal device initiates an MT-SDT process, and restores radio bearers in the first radio bearer set. A data transmission method comprising: The network device sends a first message, where the first message is used to configure a first radio bearer set and a second radio bearer set; wherein, the first radio bearer set includes at least one radio bearer that is allowed to trigger MT-SDT, and the The second set of radio bearers includes at least one radio bearer that is allowed to trigger MO-SDT. The method of claim 10, further comprising: At least one of the network device sending data volume threshold and the RSRP threshold. The method of claim 11, wherein, The network device sends a broadcast message and/or UE-specific signaling, where the system broadcast message and/or UE-specific signaling carries at least one of the data volume threshold and the RSRP threshold. A terminal device comprising: The data transmission module is configured to perform data transmission according to the radio bearer and/or data volume to which the uplink data belongs. The terminal device according to claim 13, wherein the data transmission module is configured to generate and send a first An indication message, the first indication message indicates that the terminal device has uplink data to be transmitted; the first radio bearer set includes at least one radio bearer that is allowed to trigger the network-initiated small data transmission MT-SDT. The terminal device according to claim 14, wherein the situation that the radio bearer to which the uplink data belongs is wholly or partially not included in the first radio bearer set includes at least one of the following: All or part of the radio bearers to which the uplink data belongs are included in the second radio bearer set; All or part of the radio bearer to which the uplink data belongs is not included in the first radio bearer set and the second radio bearer set; wherein, the second radio bearer set includes at least A radio bearer. The terminal device according to claim 13, wherein the data transmission module is configured to recover the radio bearers in the second radio bearer set and send the uplink data when the first condition is met; The second radio bearer set includes at least one radio bearer that is allowed to trigger MO-SDT; The first condition includes at least one of the following: All radio bearers to which the uplink data belongs are included in the second radio bearer set; The data volume of the uplink data does not exceed the data volume threshold; The received power of the downlink reference signal of the terminal device is not lower than the RSRP threshold. The terminal device according to claim 13, wherein the data transmission module is configured to, when all or part of the radio bearer to which the uplink data belongs is not included in the first radio bearer set and does not meet the first condition , generating and sending a first indication message, where the first indication message indicates that the terminal device has uplink data to be transmitted; The first condition includes at least one of the following: All radio bearers to which the uplink data belongs are included in the second radio bearer set; The data volume of the uplink data does not exceed the data volume threshold; The downlink reference signal received power of the terminal device is not lower than the RSRP threshold; Wherein, the first radio bearer set includes at least one radio bearer that is allowed to trigger MT-SDT, and the second radio bearer set includes at least one radio bearer that is allowed to trigger MO-SDT. The terminal device according to claim 16 or 17, further comprising: The first receiving module is configured to receive a system broadcast message and/or UE-specific signaling, where the system broadcast message and/or UE-specific signaling carries at least one of the data volume threshold and the RSRP threshold. The terminal device according to claim 14, 15 or 17, wherein the first indication message is at least one of uplink control information UCI, media access control MAC control element CE and radio resource control RRC message. The terminal device according to any one of claims 13 to 19, further comprising: The second receiving module is configured to receive a first message, and the first message is used to configure a first radio bearer set and a second radio bearer set; wherein, the first radio bearer set includes at least one that is allowed to trigger MT-SDT A radio bearer, the second radio bearer set includes at least one radio bearer that is allowed to trigger MO-SDT. The terminal device according to claim 20, further comprising: An initiating module, configured to receive a paging message; initiate an MT-SDT process, and recover radio bearers in the first radio bearer set. A network device comprising: The first sending module is configured to send a first message, and the first message is used to configure a first radio bearer set and a second radio bearer set; wherein, the first radio bearer set includes at least one that is allowed to trigger MT-SDT A radio bearer, the second radio bearer set includes at least one radio bearer that is allowed to trigger MO-SDT. The network device according to claim 22, further comprising: The second sending module is configured to send at least one of the data volume threshold and the RSRP threshold. The network device according to claim 23, wherein, The second sending module is configured to send a broadcast message and/or UE-specific signaling, where the system broadcast message and/or UE-specific signaling carries at least one of the data volume threshold and the RSRP threshold. A terminal device, comprising: a processor and a memory, the memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory, so that the terminal device executes claims 1 to 9 any one of the methods described. A network device, comprising: a processor and a memory, the memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory, so that the network device performs the following claims 10 to 12 any one of the methods described. A chip, comprising: a processor, configured to call and run a computer program from a memory, so that a device equipped with the chip executes the method according to any one of claims 1 to 9. A chip, comprising: a processor, configured to invoke and run a computer program from a memory, so that a device equipped with the chip executes the method as claimed in any one of claims 10 to 12. A computer-readable storage medium for storing a computer program, which causes the device to execute the method according to any one of claims 1 to 9 when the computer program is executed by a device. A computer-readable storage medium for storing a computer program, which causes the device to execute the method according to any one of claims 10 to 12 when the computer program is run by a device. A computer program product comprising computer program instructions for causing a computer to perform the method as claimed in any one of claims 1 to 9. A computer program product comprising computer program instructions for causing a computer to perform the method as claimed in any one of claims 10 to 12. A computer program that causes a computer to execute the method according to any one of claims 1 to 9. A computer program that causes a computer to perform the method as claimed in any one of claims 10 to 12. A communication system comprising: A terminal device, configured to perform the method according to any one of claims 1 to 9; A network device, configured to execute the method according to any one of claims 10-12.

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