WO2019196748A1

WO2019196748A1 - Data transmission method and apparatus

Info

Publication number: WO2019196748A1
Application number: PCT/CN2019/081563
Authority: WO
Inventors: 王和俊; 李明超; 于映辉; 刘航
Original assignee: 华为技术有限公司
Priority date: 2018-04-11
Filing date: 2019-04-04
Publication date: 2019-10-17
Also published as: CN110366140B; CN110366140A

Abstract

A data transmission method and apparatus, the method comprising: a terminal device acquires configuration information, the configuration information comprising a first flow identifier and configuration information of a data radio bearer and configuration information of a direct link radio bearer corresponding to the first flow identifier; acquiring service data and a second flow identifier corresponding to the service data; on the basis of the first flow identifier, the second flow identifier, and the configuration information of the data radio bearer and the configuration information of the direct link radio bearer corresponding to the first flow identifier, selecting at least one of the corresponding data radio bearer and the direct link radio bearer as a target radio bearer; and transmitting the service data over the target radio bearer; thus, the terminal device can flexibly select the transmission path according to practical requirements, reducing the latency of data transmission.

Description

Data transmission method and device

The present application claims priority to Chinese Patent Application No. 201810320075.6, entitled "A Data Transmission Method and Apparatus", filed on Apr. 11, 2018, the entire disclosure of which is incorporated herein by reference. .

Technical field

The present application relates to the field of vehicle networking technologies, and in particular, to a data transmission method and apparatus.

Background technique

Vehicle-mounted terminals can communicate between Vehicle to Vehicle (V2V), Vehicle to Infrastructure (V2I), Vehicle to Pedestrian (V2P), or Vehicles and Vehicles. Communication technologies such as Voice to Network (V2N) can acquire road condition information or receive information services in time. These communication methods can be collectively referred to as V2X communication.

Since V2X communication evolves on Device to Device (D2D) technology, V2X services can be transmitted through the Sidelink communication technology. The interface that the vehicle communicates with the surrounding terminals through the direct connection (Sideline) may be referred to as a PC5 interface. In addition, the vehicle can implement the vehicle networking communication by transmitting information to the base station and then forwarding the base station to other vehicles. The interface between the vehicle and the base station can be referred to as a Uu interface.

The V2X service can be sent through the Uu interface, forwarded by the LTE uplink and the base station (and the core network), and finally sent to the peer UE; or sent through the PC5 interface, and directly sent to the peer UE via the V2X Sidelink (direct link). .

In the prior art solution, the transmission path of the V2X service is selected by the upper layer of the terminal, which may be determined by the adaptation layer or the application layer, and the upper layer is determined according to the quality of service (QoS) requirements of the service or/and the service type. Select the transmission path for service transmission.

However, when the upper layer of the terminal performs the path selection, the path cannot be dynamically switched according to the channel measurement result, and the potential delay is large, which cannot meet the performance requirement of the V2X service with high reliability and low delay.

Summary of the invention

The embodiment of the present invention provides a data transmission method and device, which solves the problem that a delay caused by selecting a transmission path by an upper layer of a terminal during transmission of an existing V2X service is large.

The specific technical solutions provided by the embodiments of the present application are as follows:

In a first aspect, the embodiment of the present application provides a data transmission method, including: acquiring, by a terminal device, configuration information, where the configuration information includes a first flow identifier, and configuration information and a direct link of the data radio bearer corresponding to the first flow identifier. The configuration information of the radio bearer; the terminal device acquires the service data and the second stream identifier corresponding to the service data; the terminal device according to the first stream identifier, the second stream identifier, and the first stream identifier The configuration information of the data radio bearer and the configuration information of the direct link radio bearer select at least one of the corresponding data radio bearer and the direct link radio bearer as the target radio bearer; the terminal device transmits on the target radio bearer Business data.

Through the above data transmission method, the terminal device can flexibly select the transmission path of the service data in the access layer, reduce the handover delay of the transmission path, and flexibly balance the channel load.

In a possible design, the terminal device selects according to the first flow identifier, the second flow identifier, the configuration information of the data radio bearer corresponding to the first flow identifier, and the configuration information of the radio link of the direct link. At least one of the data radio bearer and the direct link radio bearer as the target radio bearer, including: when the second stream identifier is the same as the first stream identifier, the terminal device selects the data radio bearer and the At least one of the direct link radio bearers acts as a target radio bearer.

In a possible design, the terminal device selects at least one of the data radio bearer and the direct link radio bearer as the target radio bearer, and includes the following three schemes:

In the first embodiment, the terminal device acquires preset threshold configuration information, where the preset threshold configuration information includes at least one of a first preset threshold and a second preset threshold, and the terminal device determines the preset result according to the measurement result and the preset The threshold configuration information selects at least one of the data radio bearer and the direct link radio bearer as a target radio bearer, where the first preset threshold includes at least one channel load preset threshold; the second preset threshold At least one signal strength preset threshold is included; the measurement result includes at least one of a channel load measurement result and a signal strength measurement result.

In the foregoing solution 1, the terminal device selects a transmission path according to the measurement result and the preset threshold configuration information, so that the terminal device can select an appropriate transmission path according to the channel load condition or the signal strength, and reduce the transmission delay of the service data.

Solution 2: The terminal device acquires service characteristic configuration information, and the terminal device selects at least the data radio bearer and the direct link radio bearer according to the service characteristic configuration information and the service characteristic of the service data. One as a target radio bearer.

In the foregoing solution 2, the terminal device selects the transmission data according to the service characteristics of the service data, and can meet different service requirements of different service data.

Solution 3: The terminal device acquires target radio bearer configuration information from a network device, and the terminal device selects at least one of the data radio bearer and the direct link radio bearer as a target according to the target radio bearer configuration information. Wireless bearer.

In the foregoing solution 3, the terminal device selects a transmission path according to the indication of the network device, so that the terminal device that does not have the measurement function can implement flexible selection of the transmission path at the access layer.

In a possible design, in the foregoing solution 1, the terminal device selects at least one of the data radio bearer and the direct link radio bearer as a target radio according to the measurement result and the preset threshold configuration information. The bearer may be implemented by: the terminal device selecting at least one of the data radio bearer and the direct link radio bearer according to the at least one channel load preset threshold and the at least one channel load measurement result. Or as the target radio bearer; or the terminal device selects at least one of the data radio bearer and the direct link radio bearer as a target according to the at least one signal strength preset threshold and the at least one signal strength measurement result Radio bearer; or the terminal device selects the data according to the at least one channel load preset threshold, the at least one signal strength preset threshold, the at least one channel load measurement result, and the at least one signal strength measurement result At least one of a radio bearer and the direct link radio bearer is targeted Radio bearer.

In a possible design, in the foregoing solution, the terminal device acquires service characteristic configuration information, and the terminal device selects the data radio bearer according to the service characteristic configuration information and the service characteristic of the service data, and the At least one of the direct link radio bearers is used as the target radio bearer, and can be implemented by the following process:

The terminal device acquires service characteristic configuration information, where the service feature configuration information includes a first service feature and target radio bearer configuration information corresponding to the first service feature, and the terminal device acquires a second service corresponding to the service data. Determining, by the terminal device, at least one of the data radio bearer and the direct link radio bearer as a target radio bearer according to the second service characteristic and the service characteristic configuration information; wherein, the service feature includes priority At least one of a level, a service type, a source identifier, a destination identifier, a delay, a reliability, and a speed.

In a possible design, in the foregoing solution, the terminal device acquires target radio bearer configuration information from the network device, and the terminal device selects the data radio bearer and the direct link according to the target radio bearer configuration information. At least one of the radio bearers is used as the target radio bearer, and can be implemented in the following manner:

Manner 1: The terminal device acquires the measurement result, reports the measurement result to the network device, and acquires target radio bearer configuration information from the network device, where the terminal device performs configuration information according to the target radio bearer. At least one of the data radio bearer and the direct link radio bearer is selected as the target radio bearer.

In the foregoing manner, the network device selects a transmission path based on the measurement result of the channel load or the signal strength, and configures the transmission path to the terminal device, so that the selection of the transmission path by the terminal device is also selected based on the measurement result, thereby balancing the channel load.

Manner 2: The terminal device acquires the measurement result, and selects at least one of the data radio bearer and the direct link radio bearer as a target radio bearer according to the measurement result and the preset threshold configuration information. And the selected target radio bearer or the target radio bearer configuration information is reported to the network device, and the target radio bearer configuration information is obtained from the network device, where the terminal device selects the location according to the target radio bearer configuration information. At least one of the data radio bearer and the direct link radio bearer is referred to as a target radio bearer.

In the second mode, the terminal device selects the transmission path based on the measurement result of the channel load or the signal strength, and reports the transmission path to the network device. The network device configures the target radio bearer to transmit the service data to the terminal through the target radio bearer configuration information.

In a possible design, the terminal device acquires target radio bearer configuration information from the network device, including the following situations:

In the first case, the terminal device acquires target radio bearer configuration information sent by the network device by using radio resource control RRC signaling.

Case 2: The terminal device acquires target radio bearer configuration information sent by the network device by using a field in a service data adaptation protocol (SDAP) data unit PDU header.

Case 3: The terminal device acquires target radio bearer configuration information sent by the network device by using a media intervention control element MAC CE signaling.

Case 4: The terminal device acquires target radio bearer configuration information sent by the network device by using downlink control information DCI.

In a possible design, the terminal device selects at least one of the data radio bearer and the direct link radio bearer as the target radio bearer, including: the first protocol layer of the terminal device acquires the measurement a result, and selecting a target radio bearer according to the measurement result, where the first protocol layer of the terminal device transmits service data on the target radio bearer; or the second protocol layer of the terminal device acquires the measurement result, and Selecting a target radio bearer according to the measurement result, where the first protocol layer of the terminal device transmits service data on the target radio bearer, where the first protocol layer is a SDAP layer; or the first protocol layer is One of an RRC layer, a PDCP layer, an RLC layer, and a MAC layer; the second protocol layer is an RRC layer or a MAC layer, or the second protocol layer is one of a SDAP layer, a PDCP layer, an RCL layer, and a PHY layer.

In a possible design, the at least one channel load preset threshold includes: a first channel load preset threshold; or the at least one channel load preset threshold includes a first channel load preset threshold and a second channel load a preset threshold; the at least one signal strength preset threshold includes a first signal strength preset threshold; or the at least one signal strength preset threshold includes a first signal strength preset threshold and a second preset signal strength preset threshold .

In a possible design, the terminal device selects according to the at least one channel load preset threshold, the at least one signal strength preset threshold, the at least one channel load measurement result, and the at least one signal strength measurement result. At least one of the data radio bearer and the direct link radio bearer is used as the target radio bearer, including:

When the channel load measurement result is greater than or equal to the first channel load preset threshold and/or the signal strength measurement result is greater than or equal to the first signal strength preset threshold, the terminal device selects Determining the data radio bearer as the target radio bearer; or

When the channel load measurement result is less than or equal to the first channel load preset threshold and/or the signal strength measurement result is less than or equal to the first signal strength preset threshold, the terminal device selects Determining the direct link radio bearer as the target radio bearer; or

The terminal device selects the data when the channel load measurement result is less than or equal to the first channel load preset threshold and the signal strength measurement result is greater than or equal to the first signal strength preset threshold. a radio bearer or the direct link radio bearer as a target radio bearer; or

Selecting the data radio bearer and the data when the load measurement result is greater than or equal to the first channel load preset threshold and the signal strength measurement result is less than or less than the first signal strength preset threshold. Directly connecting the link radio bearer as the target radio bearer; or

When the channel load measurement result is greater than or equal to the second channel load preset threshold and/or the signal strength measurement result is greater than or equal to the second signal strength preset threshold, the terminal device selects Determining the data radio bearer as the target radio bearer; or

The terminal device selects the data when the channel load measurement result is less than or equal to the first channel load preset threshold and the signal strength measurement result is greater than or equal to the signal strength second preset threshold. a radio bearer or the direct link radio bearer as a target radio bearer; or

The terminal device selects the data when the channel load measurement result is greater than or equal to the second channel load preset threshold and the signal strength measurement result is less than or equal to the signal strength first preset threshold. The radio bearer and the direct link radio bearer are the target radio bearers.

In the above design, the terminal device can select the transmission path based on the channel load measurement result, so that the channel load can be balanced; the transmission path can be selected based on the signal strength measurement result to ensure the reliability index of the service data; and the channel load can also be integrated. The measurement results and signal strength measurement results are used to select the transmission path to ensure that the service quality indicators of the service data are guaranteed.

In a second aspect, the embodiment of the present application provides a data transmission apparatus, which is applied to a terminal device, and includes:

a processing unit, configured to acquire configuration information, where the configuration information includes a first flow identifier, configuration information of a data radio bearer corresponding to the first flow identifier, and configuration information of a radio link of a direct link; and a receiving unit, configured to acquire service data a second stream identifier corresponding to the service data; the processing unit is further configured to: according to the first stream identifier, the second stream identifier, the configuration information of the data radio bearer corresponding to the first stream identifier, and the direct connection The configuration information of the link radio bearer selects at least one of the corresponding data radio bearer and the direct link radio bearer as the target radio bearer, and the sending unit is configured to transmit the service data on the target radio bearer.

In a possible design, the processing unit is specifically configured to: when the second flow identifier is the same as the first flow identifier, select at least one of the data radio bearer and the direct link radio bearer As the target radio bearer.

In a possible design, the processing unit is specifically configured to: acquire preset threshold configuration information, where the preset threshold configuration information includes at least one of a first preset threshold and a second preset threshold, according to the measurement result and The preset threshold configuration information selects at least one of the data radio bearer and the direct link radio bearer as a target radio bearer, where the first preset threshold includes at least one channel load preset threshold; The second preset threshold includes at least one signal strength preset threshold; the measurement result includes at least one of a channel load measurement result and a signal strength measurement result; or

Obtaining service characteristic configuration information, where the processing unit is configured to: select at least one of the data radio bearer and the direct link radio bearer as a target according to the service characteristic configuration information and the service characteristic of the service data Wireless bearer; or

Obtaining target radio bearer configuration information from the network device, and selecting at least one of the data radio bearer and the direct link radio bearer as the target radio bearer according to the target radio bearer configuration information.

In a possible design, the processing unit is specifically configured to:

Selecting at least one of the data radio bearer and the direct link radio bearer as a target radio bearer according to the at least one channel load preset threshold and the at least one channel load measurement result; or

Selecting at least one of the data radio bearer and the direct link radio bearer as a target radio bearer according to the at least one signal strength preset threshold and the at least one signal strength measurement result; or

Selecting the data radio bearer and the direct link according to the at least one channel load preset threshold, the at least one signal strength preset threshold, the at least one channel load measurement result, and the at least one signal strength measurement result At least one of the path radio bearers acts as a target radio bearer.

In a possible design, the processing unit is specifically configured to: obtain service characteristic configuration information, where the service feature configuration information includes a first service feature and target radio bearer configuration information corresponding to the first service feature; a second service characteristic corresponding to the service data; selecting at least one of the data radio bearer and the direct link radio bearer as the target radio bearer according to the second service characteristic and the service characteristic configuration information; The feature includes at least one of a priority, a service type, a source identifier, a destination identifier, a delay, a reliability, and a speed.

In a possible design, the processing unit is specifically configured to:

Acquiring the measurement result, reporting the measurement result to the network device by using the sending unit, acquiring target radio bearer configuration information from the network device by using the receiving unit, and selecting the location according to the target radio bearer configuration information Determining at least one of a data radio bearer and the direct link radio bearer as a target radio bearer; or

Acquiring the measurement result, selecting at least one of the data radio bearer and the direct link radio bearer as the target radio bearer according to the measurement result and the preset threshold configuration information, where the sending unit The selected target radio bearer or target radio bearer configuration information is reported to the network device, and the target radio bearer configuration information is obtained from the network device by the receiving unit, and the data is selected according to the target radio bearer configuration information. At least one of a radio bearer and the direct link radio bearer is a target radio bearer.

In a possible design, when the processing unit acquires the target radio bearer configuration information from the network device, the processing unit is configured to: acquire the target radio bearer configuration information sent by the network device by using the radio resource control RRC command; or adopt the service data. The field in the PDU header of the protocol SDAP protocol data unit acquires the target radio bearer configuration information sent by the network device; or obtains the target radio bearer configuration information sent by the network device by using the media intervention control element MAC CE signaling; or The downlink control information DCI acquires target radio bearer configuration information sent by the network device.

In a possible design, when the processing unit selects at least one of the data radio bearer and the direct link radio bearer as the target radio bearer, specifically, the first protocol layer of the terminal device is used. Obtaining the measurement result, and selecting a target radio bearer according to the measurement result, using the first protocol layer of the terminal device to transmit service data on the target radio bearer; or, by using a second protocol layer of the terminal device Obtaining the measurement result, and selecting a target radio bearer according to the measurement result, using the first protocol layer of the terminal device to transmit service data on the target radio bearer, where the first protocol layer is a SDAP layer; Or the first protocol layer is one of an RRC layer, a PDCP layer, an RLC layer, and a MAC layer; the second protocol layer is an RRC layer or a MAC layer, or the second protocol layer is an SDAP layer, a PDCP layer, One of the RCL layer and the PHY layer.

In a possible design, the processing unit is specifically configured to:

Selecting the data radio bearer when the channel load measurement result is greater than or equal to the first channel load preset threshold and/or the signal strength measurement result is greater than or equal to the first signal strength preset threshold. As the target radio bearer; or

Selecting the direct link when the channel load measurement result is less than or equal to the first channel load preset threshold and/or the signal strength measurement result is less than or equal to the first signal strength preset threshold The radio bearer is the target radio bearer; or

Selecting the data radio bearer when the channel load measurement result is less than or equal to the first channel load preset threshold and the signal strength measurement result is greater than or equal to the first signal strength preset threshold. Or the direct link radio bearer is the target radio bearer; or

Selecting the data radio bearer when the channel load measurement result is greater than or equal to the second channel load preset threshold and/or the signal strength measurement result is greater than or equal to the second signal strength preset threshold. As the target radio bearer; or

Selecting the data radio bearer or the channel when the channel load measurement result is less than or equal to the first channel load preset threshold and the signal strength measurement result is greater than or equal to the signal strength second preset threshold. Determining the direct link radio bearer as the target radio bearer; or

Selecting the data radio bearer and the channel when the channel load measurement result is greater than or equal to the second channel load preset threshold and the signal strength measurement result is less than or equal to the signal strength first preset threshold. The direct link radio bearer is referred to as a target radio bearer.

In a third aspect, the present application provides a terminal device comprising means for performing each of the methods or actions performed by the terminal device in the first aspect or any of the above designs. The unit included in the terminal device can be implemented by software and/or hardware.

In a fourth aspect, the application provides a terminal device. The terminal device includes at least one processor and a communication interface. The communication interface may be used for communication interaction between the terminal device and other devices, such as a radio access network device and/or other terminal devices, such as interaction control signaling and/or service data, etc., the communication interface may have communication The communication function is implemented by a circuit, and the communication interface can also be designed as two circuits having communication and transceiving functions for communication interaction between the terminal device and the radio access network device, and for the terminal device and other terminals. The communication interaction between the devices, when the program instructions are executed in the at least one processor, enables the functions of the terminal device in the first aspect or any of the designs described above. Optionally, the terminal device may further include a memory. This memory is used to store the required program instructions and/or data. Alternatively, the terminal device may be a vehicle in a transportation communication system (such as V2X), or a communication device or system equipped to the vehicle, or a communication device or system temporarily used to communicate with the outside world.

In a fifth aspect, the present application provides a computer readable storage medium applicable to a terminal device. The computer readable storage medium has program code that, when executed, causes the functions of the terminal device as in the first aspect described above and any of its designs. For example, the computer readable medium can store program code for execution by the terminal device, the program code including instructions for performing the functions of the terminal device of the first aspect or any of the designs described above.

In a sixth aspect, the present application provides a computer program product, applicable to a terminal device, the computer program product comprising program instructions, when the program instructions are executed, to implement the first aspect or any of the designs thereof The function of the terminal device. For example, when the computer program product is executed on the terminal device, the terminal device is caused to perform the terminal device operation in the first aspect or any of the designs described above.

In a seventh aspect, the present application provides a system chip, which is applicable to a terminal device, where the system chip includes at least one processor, and an input/output interface, when the instruction is executed at the at least one processor, so as to implement the first The functionality of the terminal device in either aspect or in any design. Optionally, the system chip may further include at least one memory and a bus for storing instructions and or data executed by the processor.

In an eighth aspect, the application provides a communication system, the communication system comprising an entity as described in any one of the second, third, fourth, fifth, sixth, and seventh aspects.

DRAWINGS

1 and 2 are schematic diagrams of a V2X transmission scenario in the present application;

3 is a flowchart of a service data transmission method according to the present application;

4 is a schematic diagram of a service data transmission path of the present application;

Figure 5 is a structural diagram of a service data transmission apparatus of the present application;

FIG. 6 is a schematic structural diagram of a terminal device according to the present application.

detailed description

The technical solutions in the embodiments of the present application will be clearly and completely described in the following with reference to the accompanying drawings in the embodiments.

The techniques described herein may be used in various communication systems, such as Long Term Evolution (LTE) systems, fifth generation mobile communication systems (5G), and other such communication systems.

Hereinafter, some of the terms in the embodiments of the present invention will be explained to facilitate understanding by those skilled in the art.

(1) A terminal is a device that provides voice and/or data connectivity to a user, for example, including a handheld device having a wireless connection function, or a processing device connected to a wireless modem. The terminal can communicate with the core network via a Radio Access Network (RAN) to exchange voice and/or data with the RAN. The terminal may include a vehicle, a User Equipment (UE), a wireless terminal device, a mobile terminal device, a Subscriber Unit, a Subscriber Station, a Mobile Station, a Mobile Station, and Remote Station, Access Point (AP), Remote Terminal, Access Terminal, User Terminal, User Agent, or User Equipment, etc. For example, it may include a mobile phone (or "cellular" phone), a computer with a mobile terminal device, a dedicated terminal device in a Narrow Band Internet of Things (NB-IoT), portable, pocket, handheld , a built-in computer or a mobile device on the car. For example, Personal Communication Service (PCS) phones, cordless phones, Session Initiation Protocol (SIP) phones, Wireless Local Loop (WLL) stations, Personal Digital Assistants (PDAs), etc. .

In the embodiment of the present invention, the terminal may further include a V2X device, such as an On Broad Unit (OBU) in the vehicle, and hereinafter, the terminal is a V2X device as an example.

(2) Network devices, including, for example, access network devices and core network devices. An access network device, for example, including a base station (e.g., an access point), can refer to a device in the access network that communicates with the wireless terminal over one or more sectors over the air interface. The base station can be used to convert the received air frame to an Internet Protocol (IP) packet as a router between the terminal and the rest of the access network, wherein the remainder of the access network can include an IP network. The base station can also coordinate attribute management of the air interface. For example, the base station may include an evolved base station (eNB or e-NodeB, evolutional Node B) in an LTE system or an evolved LTE system (LTE-A), or a small base station in an LTE system or an LTE-A system (micro/pico eNB), or may include a next generation node B (gNB) in the NR system, or a transmission point (TP), or a transmission and receiver point (transmission and receiver point, TRP), etc., is not limited by the embodiment of the present invention.

The core network device includes, for example, a Mobility Management Entity (MME), or may also include a corresponding functional entity in the NR system.

(3) V2X, currently, vehicles can communicate by vehicle to vehicle (V2V) or vehicle to road infrastructure (V2I), or communication between vehicles and pedestrians (Vehicle to Pedestrian, V2P), or Vehicle to Network (V2N) to obtain road condition information or receive information in time. These communication methods can be collectively referred to as V2X communication. Take the most common V2V and V2I as an example: the vehicle can communicate with its surrounding vehicles by V2V communication, and its own speed, direction of travel, specific position, emergency brakes, etc., and the surrounding vehicles obtain the information to make the driver It is better to perceive the traffic conditions outside the line of sight, so that the dangerous situation can be pre-judged in advance, and then timely avoidance can be made. For V2I communication, in addition to the above-mentioned interaction of security information, the roadside infrastructure can also provide various types of service information and data network access for vehicles, and functions such as non-stop charging and in-vehicle entertainment greatly improve traffic intelligence. Chemical. The network used by V2X communication is generally referred to as an Internet of Vehicles.

(4) Device to Device (D2D) technology can support direct data communication between terminals and terminals using dedicated air interface technology. It is an end-to-end direct communication technology. The biggest difference from the traditional cellular communication technology is that, with the support of the D2D technology, the terminal and the terminal can directly communicate without requiring the relay of the base station, and the base station can perform resource configuration, scheduling, and coordination, etc., between the auxiliary terminals. Direct communication. D2D technology can be applied to the Internet of Vehicles business.

(5) The PC5 interface is a direct communication interface between the terminal device and the terminal device introduced in the D2D project of the 3rd Generation Partnership Project (3GPP) Release 12 (Rel-12). The adjacent terminals can transmit data through the direct link within the effective communication range of the PC 5, without forwarding through the central node (for example, the base station), and do not need to transmit information through the traditional cellular link, and the communication is relatively fast. convenient.

(6) The service data, in this document, mainly includes the data under the V2X service, for example, the data under the local broadcast service of the non-(non)-IP service including the V2X, that is, the service data described in the embodiment of the present invention, Local broadcast data for non-IP traffic of V2X may be included.

(7) Terms in the embodiments of the present invention: "system" and "network" can be used interchangeably. "Multiple" means two or more. "and/or", describing the association relationship of the associated objects, indicating that there may be three relationships, for example, A and/or B, which may indicate that there are three cases where A exists separately, A and B exist at the same time, and B exists separately. In addition, the character "/", unless otherwise specified, generally indicates that the contextual object is an "or" relationship.

In order to better understand the technical solutions provided by the embodiments of the present invention, the technical background of the embodiments of the present invention is first described below.

LTE is currently the mainstream wireless communication technology, in which D2D technology is regarded as an important feature and standardization work, which supports direct communication between terminals. Considering that some V2X services (such as V2V/V2I) communication scenarios also belong to terminal direct communication, V2X service data can be transmitted through D2D technology. Referring to FIG. 1, which includes base station, vehicle 1 and vehicle 2, vehicle 1 and vehicle 2 can communicate directly through direct connection. However, sometimes due to the occlusion of the building (such as a crossroads) or the need for the vehicle to spread the message farther, other communication methods are needed. For example, by means of the base station relay, the vehicle can transmit the V2X service data to the base station, and then The base station transmits to other vehicles to implement the vehicle networking communication. The interface in which the vehicle communicates with the surrounding terminals through direct connection may be referred to as a PC5 interface, and the interface between the vehicle and the base station may be referred to as a Uu interface.

In the existing V2X service, when the V2X service data needs to be locally broadcasted by the base station, it needs to be uploaded to the core network through the base station, and after the core network performs route addressing and forwarding, the downlink transmission is performed to the base station for broadcasting. . Reference may be made to FIG. 2, which includes a base station, an MME, a vehicle 1, a vehicle 2, and a vehicle 3. For example, when the vehicle 1 generates V2X service data that needs to communicate with the vehicle 2, the vehicle 1 transmits the V2X service data to the base station, and the base station forwards the MME to the MME in the core network, and the MME performs route addressing and forwarding, and then the V2X service. The data is sent to the base station, which in turn sends it to the vehicle 2.

Therefore, the V2X service can be sent through the Uu interface, forwarded through the LTE uplink and the base station, and the core network, and finally sent to the peer terminal; or sent through the PC5 interface, and directly sent to the pair via the V2X direct link (sidelink). Terminal. However, the reliability and delay of the service transmission through the Uu interface and the PC5 interface are different. The V2X service is sent through the Uu interface. The reliability is higher. The V2X service is sent through the PC5 interface, and the delay is lower. When a terminal sends a V2X service, the selected transmission path is different according to the service type of the service and the QoS requirement. The transmission path includes a Uu interface, a PC5 interface, a Uu interface, a PC5 interface, a Uu interface, and a PC5 interface.

In the prior art, the transmission path selection of the V2X service is determined by the upper layer, for example, the adaptation layer or the application layer, and the upper layer selects according to the quality of service (QoS) requirements of the V2X service or/and the service type. Transmission path for service transmission.

When the upper layer selects the Uu interface for service transmission, the service data is delivered to the access layer; the network device establishes a corresponding bearer between the terminal device and the P-GW according to the QoS requirements of different services. The terminal device filters the service data to the corresponding bearer based on the TFT Traffic Flow Template (TFT), so that each service can be transmitted in the bearer with the appropriate QoS.

When the upper layer selects the PC5 interface for service transmission, the upper layer submits the relevant parameters to the access layer in the form of a primitive, and the terminal device establishes a direct link radio bearer for the terminal device according to the destination ID of the different service (Sidelink Radio). Bearer, SLRB), and then use these bearers for service transmission.

The existing transmission path selection is performed in the upper layer. Because the working mechanism of the upper layer is different when the Uu interface is selected and the PC5 interface is selected, the access layer cannot flexibly perform path switching according to the channel measurement result, and the potential selection is brought in the path selection. Large delays cannot meet the performance requirements of V2X services with high reliability and low latency.

In view of this, the embodiment of the present invention provides a new data transmission method, and performs selection of a transmission path or a radio bearer based on a stream (which may be QoS Flow). In the embodiment of the present application, the terminal acquires configuration information, where the configuration information includes a first flow identifier, configuration information of a data radio bearer corresponding to the first flow identifier, and configuration information of a radio link of a direct link; acquiring service data and the Corresponding to the second flow identifier corresponding to the service data, selecting the corresponding data wireless according to the first flow identifier, the second flow identifier, the configuration information of the data radio bearer corresponding to the first flow identifier, and the configuration information of the radio bearer of the direct link At least one of the bearer and the direct link radio bearer is used as the target radio bearer, and the service data is transmitted on the target radio bearer. Since the terminal device can flexibly select the transmission path according to actual needs, the delay of data transmission is reduced. .

The technical solutions provided by the embodiments of the present invention are described in the following with reference to the accompanying drawings.

An embodiment of the present application provides a service data transmission method, which may be performed by a terminal device. In the following description, the application scenario shown in FIG. 1 or the application scenario shown in FIG. 2 is applied as an example. Please refer to FIG. 3, which is a flowchart of the method.

Step 30: The terminal acquires configuration information, where the configuration information includes a first flow identifier, configuration information of the DRB corresponding to the first flow identifier, and configuration information of the SLRB.

Specifically, the access layer of the terminal acquires configuration information.

Specifically, the configuration information of the DRB includes: a data radio bearer identifier (DRB ID) and a corresponding set of DRB configuration parameters, and the DRB configuration parameter may include: PDCP configuration information (pdcp-Config),

RLC configuration information (rlc-Config), Evolved Packet System Bearer (EPS) bearer identifier (eps-BearerIdentity), logical channel identifier (logicalChannelIdentity), logical channel configuration information (logicalChannelConfig), and the like.

The configuration information of the SLRB may include: a source identifier, a destination identifier, and a corresponding direct link radio bearer, and specifically includes carrier and/or resource pool configuration information, including carrier identifier, carrier configuration information, resource pool identifier, and resource pool configuration information. Configuration information.

The configuration information may be configured to the terminal in a pre-configured manner, or may be configured by the network device through RRC dedicated signaling or system broadcast. When the terminal obtains the configuration information, the terminal may obtain the protocol in a standardized manner; or through pre-storage. Information acquisition; or obtain configuration information through the upper application.

Optionally, the foregoing configuration information may include an enable indication information, configured to enable the DRB, the SLRB, or enable the DRB and the SLRB to be enabled simultaneously for the first flow identifier.

Step 31: The terminal acquires service data and a second flow identifier corresponding to the service data.

Specifically, the data plane of the terminal acquires the service data, and the service data is transmitted from the upper layer to the access layer in the form of a stream, including the flow identifier and the service data, and the service characteristics corresponding to the service data, and the service characteristics include the priority (Proximity Service) Per-Packet Priority, PPPP), Source Identity, Destination Identity, and so on.

Step 32: The terminal selects corresponding data radio bearer and direct according to the first flow identifier, the second flow identifier, the configuration information of the data radio bearer corresponding to the first stream identifier, and the configuration information of the radio link of the direct link. At least one of the link radio bearers acts as a target radio bearer.

Further, when the second flow identifier is the same as the first flow identifier, the terminal selects at least one of the data radio bearer and the direct link radio bearer as a target radio bearer.

Step 33: The terminal transmits the service data on the target radio bearer.

Specifically, the terminal selects at least one of the data radio bearer and the direct link radio bearer as the target radio bearer, which can be implemented by the following three implementation manners:

In the first implementation manner, the terminal acquires preset threshold configuration information, where the preset threshold configuration information includes at least one of a first preset threshold and a second preset threshold, and the terminal according to the measurement result and the The preset threshold configuration information selects at least one of the data radio bearer and the direct link radio bearer as a target radio bearer, where the first preset threshold includes at least one channel load preset threshold; the second pre- The threshold is configured to include at least one signal strength preset threshold; the measurement result includes at least one of a channel load measurement result and a signal strength measurement result.

Specifically, in a practical application, the channel load may be characterized by a Channel Busy Ratio (CBR), where the channel load preset threshold may be a CBR (Channel Busy Ratio, CBR) threshold, and a corresponding channel load measurement result. It is CBR; the signal strength can be characterized by Reference Signal Receiving Power (RSRP), the signal strength preset threshold can be an RSRP threshold, and the corresponding signal strength measurement result is RSRP.

In the first implementation manner, when the terminal selects at least one of the data radio bearer and the direct link radio bearer as the target radio bearer according to the measurement result and the preset threshold configuration information, the following three types of transmission may be utilized. Path selection criteria implementation:

Transmission path selection criterion 1. The terminal selects at least one of the data radio bearer and the direct link radio bearer as a target radio according to the at least one channel load preset threshold and the at least one channel load measurement result. Hosted.

When the channel load measurement result is greater than or equal to the first channel load preset threshold, the terminal selects the data radio bearer as the target radio bearer. When the channel load measurement result is less than or equal to the first channel load preset threshold, the terminal device selects the direct link radio bearer as the target radio bearer.

For example, when the at least one channel load preset threshold includes the first channel load preset threshold, the CBR threshold is represented by CBRthres, and when the CBR is greater than or equal to CBRthres, the terminal selects the data radio bearer as the target radio bearer. When the CBR is less than or equal to CBRthres, the terminal selects the direct link radio bearer as the target radio bearer.

For another example, when the at least one channel load preset threshold includes a first channel load preset threshold and a second channel load preset threshold, the first CBR threshold is represented by CBRthresmin, and the second CBR threshold is represented by CBRthresmax, where CBRthresmax >CBRthresmin, when CBR>(=)CBRthresmax, the terminal selects the data radio bearer as the target radio bearer, and when the CBR<(=)CBRthresmin, the terminal selects the direct link radio bearer as the target radio Hosted.

Transmission path selection criterion 2: the terminal selects at least one of the data radio bearer and the direct link radio bearer as a target radio according to the at least one signal strength preset threshold and the at least one signal strength measurement result Hosted.

When the signal strength measurement result is greater than or equal to the first signal strength preset threshold, the terminal selects the data radio bearer as a target radio bearer; when the signal strength measurement result is less than or less than or equal to the first When a signal strength presets a threshold, the terminal device selects the direct link radio bearer as the target radio bearer.

For example, when the at least one signal strength preset threshold includes the first signal strength preset threshold, the RSRP threshold is represented by RSRPthres, and when RSRP>(=)RSRPthres, the terminal selects the data radio bearer as the target radio bearer. When the RSRP<(=)RSRPthres, the terminal selects the direct link radio bearer as the target radio bearer.

For another example, when the at least one signal strength preset threshold includes a first signal strength preset threshold and a second signal strength preset threshold, the first RSRP threshold is represented by RSRPthresmin, and the second RSRP threshold is represented by RSRPthresmax, where RSRPthresmax If the RSRP is greater than or equal to RSRPthresmax, the terminal selects the data radio bearer as the target radio bearer, and when the RSRP is less than or equal to RSRPthresmin, the terminal selects the direct link radio bearer as the target radio. Hosted.

Transmission path selection criterion 3: the terminal selects the data radio bearer and the direct connection according to the channel load preset threshold, the signal strength preset threshold, the channel load measurement result, and the signal strength measurement result At least one of the link radio bearers acts as a target radio bearer.

Case 1, the case where the channel load preset threshold and the signal strength preset threshold both include a preset threshold.

Specifically, when the channel load measurement result is greater than or equal to the first channel load preset threshold and the signal strength measurement result is greater than or equal to the first signal strength preset threshold, the terminal selects a location The data radio bearer is used as the target radio bearer.

When the channel load measurement result is less than or equal to the first channel load preset threshold and the signal strength measurement result is less than or less than the first signal strength preset threshold, the terminal device selects the straight The link radio bearer acts as the target radio bearer.

Selecting the data radio bearer and the data when the load measurement result is greater than or equal to the first channel load preset threshold and the signal strength measurement result is less than or less than the first signal strength preset threshold. The direct link radio bearer acts as the target radio bearer.

For example, for the case where the RSRP threshold and the CBR threshold have only one threshold, respectively:

At this time, the CBR threshold includes CBRthres, and the RSRP threshold includes RSRPthres:

When the RSRP is greater than or equal to RSRPthres, and the CBR is greater than or equal to CBRthres, the terminal selects the data radio bearer as the target radio bearer.

When the RSRP is greater than or equal to RSRPthres, and the CBR is less than or equal to CBRthres, the terminal selects any one of the data radio bearer and the direct link radio bearer as the target radio bearer.

When the RSRP is less than or equal to RSRPthres, and the CBR is greater than or equal to CBRthres, the terminal selects the data radio bearer and the direct link radio bearer as the target radio bearers.

When the RSRP is less than or equal to RSRPthres, and the CBR is less than or equal to CBRthres, the terminal selects the direct link radio bearer as the target radio bearer.

In the second case, when the channel load preset threshold and the signal strength preset threshold respectively include two preset thresholds, the channel load preset threshold includes a first channel load preset threshold and a second channel load preset. The threshold is set, wherein the first channel load preset threshold is smaller than the second channel load preset threshold; the signal strength preset threshold includes a first signal strength preset threshold and a second signal light preset threshold, wherein the first signal strength preset The threshold is less than the second signal strength preset threshold.

Specifically, when the channel load measurement result is greater than or equal to the second channel load preset threshold and/or the signal strength measurement result is greater than or equal to the second signal strength preset threshold, the terminal The data radio bearer is selected as the target radio bearer.

When the channel load measurement result is less than or equal to the first channel load preset threshold and/or the signal strength measurement result is less than or less than or equal to the first signal strength preset threshold, the terminal selects the The direct link radio bearer acts as the target radio bearer.

The terminal selects the data wireless when the channel load measurement result is less than or equal to the first channel load preset threshold and the signal strength measurement result is greater than or equal to the signal strength second preset threshold. The bearer or the direct link radio bearer is the target radio bearer.

The terminal selects the data wireless when the channel load measurement result is greater than or equal to the second channel load preset threshold and the signal strength measurement result is less than or less than the signal strength first preset threshold. The bearer and the direct link radio bearer are the target radio bearers.

For example, for the case where the RSRP threshold and the CBR threshold respectively include two thresholds:

At this time, the CBR threshold includes CBRthresmin and CBRthresmax, and CBRthresmin is smaller than CBRthresmax; the RSRP threshold includes RSRPthresmin and RSRPthresmax, and RSRPthresmin is smaller than RSRPthresmax.

When the RSRP is greater than or equal to RSRPthresmax, and the CBR is greater than or equal to CBRthresmax, the terminal selects the data radio bearer as the target radio bearer.

When the RSRP is greater than or equal to RSRPthresmax, and the CBR is less than or equal to CBRthresmin, the terminal selects any one of the data radio bearer and the direct link radio bearer as the target radio bearer.

When the RSRP is less than or equal to RSRPthresmin, and the CBR is less than or equal to CBRthresmin, the terminal selects the direct link radio bearer as the target radio bearer.

In other cases, the terminal selects the data radio bearer and the direct link radio bearer as the target radio bearers.

It should be noted that in order to avoid frequent switching of the selected path, the selection of the target radio bearer may be semi-static, that is, the T duration is effective after each selection; or N times of service data transmission is effective.

In a second implementation manner, the terminal acquires service characteristic configuration information, and the terminal selects the data radio bearer and the direct link radio bearer according to the service characteristic configuration information and the service characteristic of the service data. At least one of the wireless bearers as the target.

The service feature configuration information, that is, the binding relationship between the service feature and the radio bearer. The service feature configuration information can be configured by the base station or the core network to the terminal, or can be pre-configured or standardized in the form of a protocol. The target radio bearer can be implemented by the following process:

S1: The terminal acquires service feature configuration information, where the service feature configuration information includes a first service feature and target radio bearer configuration information corresponding to the first service feature.

S2: The terminal acquires a second service characteristic corresponding to the service data.

S3: The terminal selects at least one of the data radio bearer and the direct link radio bearer as the target radio bearer according to the second service characteristic and the service characteristic configuration information.

The service feature includes at least one of a priority, a service type, a source identifier, a destination identifier, a delay, a reliability, a speed, and the like.

It should be noted that the service characteristics of the service data are obtained together when the terminal acquires the service data. When the upper layer transmits the service data to the adaptation layer and the access layer, the corresponding service characteristics are also transmitted in the form of parameters. Including priority, source identification, destination identification, delay, reliability, packet loss rate, (vehicle) speed, transmission rate, etc.

In a third implementation manner, the terminal acquires target radio bearer configuration information from a network device, and the terminal selects at least one of the data radio bearer and the direct link radio bearer according to the target radio bearer configuration information. As a target radio bearer, when it is implemented, it may include the following two possible designs:

In a first possible design, the terminal acquires the measurement result, reports the measurement result to the network device, and acquires target radio bearer configuration information from the network device, where the terminal is wireless according to the target The bearer configuration information selects at least one of the data radio bearer and the direct link radio bearer as a target radio bearer.

In a second possible design, the terminal acquires the measurement result, and selects at least one of the data radio bearer and the direct link radio bearer according to the measurement result and the preset threshold configuration information. And obtaining, by the network device, the target radio bearer configuration information, where the terminal selects at least the data radio bearer and the direct link radio bearer according to the target radio bearer configuration information. One as a target radio bearer.

It should be noted that, when the network device indicates the target radio bearer configuration information, an indication field may be used to indicate that the terminal selects at least one of the DRB, the SLRB, the DRB, or the SLRB, the DRB, and the SLRB, or the default bearer as the target radio bearer; It may be configuration information indicating a set of transmission paths or target radio bearers, and the terminal selects an appropriate transmission path or a target radio bearer according to the configuration information; or may indicate a set of path selection rules, and the terminal selects an appropriate transmission according to the path selection rule. Path or target radio bearer.

Specifically, when the terminal selects at least one of the data radio bearer and the direct link radio bearer as the target radio bearer, the terminal is implemented by using different protocol layers:

In a possible implementation, the first protocol layer of the terminal acquires the measurement result, and selects a target radio bearer according to the measurement result, where the first protocol layer of the terminal transmits a service on the target radio bearer. Data, wherein the first protocol layer is a SDAP layer; or the first protocol layer is one of an RRC layer, a PDCP layer, an RLC layer, and a MAC layer.

In another possible implementation manner, the second protocol layer of the terminal acquires the measurement result, and selects a target radio bearer according to the measurement result, where the first protocol layer of the terminal transmits on the target radio bearer Service data, the second protocol layer is an RRC layer or a MAC layer.

Specifically, the selection of the target radio bearer is performed at the SDAP layer of the access layer protocol stack, and when the DRB is selected as the target radio bearer of the service data, the service data is sequentially passed through the PDCP layer, the RLC layer, and the MAC through the protocol stack corresponding to the Uu interface in the NR. After the layer and the physical layer are processed, the Uu interface is sent out; when the selected target radio bearer is SLRB, the service data is processed by the NR-V2X Sidelink protocol stack through the PDCP layer, the RLC layer, the MAC layer, and the physical layer. The PC5 port sends out; correspondingly, when DRB and SLRB are simultaneously selected as the target radio bearers for service data transmission, the service data is simultaneously passed through the PDCP layer, the RLC layer, the MAC layer, and the physical layer through the protocol stack of the NR and NR-V2X Sidelink. After the corresponding processing, the layer is sent out through the Uu port and the PC5 port.

Optionally, the selection of the target radio bearer may also be performed in the RRC layer, the PDCP layer, the RLC layer, and the MAC layer, which is not limited herein.

Specifically, when the terminal acquires radio bearer configuration information from the network device, the following four modes are included:

In a first mode, the terminal acquires radio bearer configuration information sent by the network device by using RRC signaling.

Manner 2: The terminal acquires radio bearer configuration information sent by the network device by using a field in a header of the SDAP PDU.

Manner 3: The terminal acquires radio bearer configuration information sent by the network device by using MAC CE signaling.

Manner 4: The terminal acquires radio bearer configuration information sent by the network device by using the DCI.

The above method is applied to the NR system as an example for illustration.

For the V2X service data based on the NR technology, the concept of QoS flow in the NR is introduced in the NR-V2X protocol, and the DRB and the SLRB are established for the QoS flow of each V2X on the terminal device side. Specifically, as shown in FIG. 4, the upper layer protocol is shown. The layer maps the V2X service data to the QoS flow and forwards it to the access layer together with the relevant parameters; the SDAP layer of the access layer maps the QoS Flow to the DRB or/and the SLRB; and configures the DRB and the QoS Flow on the terminal device side. SLRB; the service data corresponding to the DRB is transmitted through the Uu port, and the service data corresponding to the SLRB is transmitted through the PC5 port.

Embodiment 1

On the terminal device side, the DRB and the SLRB are established for each V2X QoS flow. When there is V2X service data transmission, the terminal device selects the target radio bearer to transmit the service data according to the service characteristic configuration information and the service characteristic of the service data. The specific process is as follows.

Step 50: The terminal device acquires configuration information, where the configuration information includes a first flow identifier and configuration information of the DRB corresponding to the first flow identifier and configuration information of the SLRB.

Step 51: The terminal device obtains the service feature configuration information, where the service feature configuration information includes the first service feature and the target radio bearer configuration information corresponding to the first service feature.

For example, the first service feature includes at least one of a priority, a service type, a source identifier, a destination identifier, a delay, a reliability, and a speed. If the first service feature is a priority, the service feature configuration information is a different priority. Target radio bearer configuration information.

Step 52: The terminal device acquires the second flow identifier corresponding to the service data and the service data, and the second service feature corresponding to the service data.

Step 53: When the first flow identifier and the second flow identifier are the same, the terminal device selects the data radio bearer and the direct link radio bearer according to the second service characteristic and the service characteristic configuration information. At least one of the targets is a radio bearer.

Specifically, the terminal device determines the target radio bearer configuration information corresponding to the second service feature according to the priority corresponding to the second service feature, and the service feature configuration information, and selects the data radio bearer and the direct connection according to the target radio bearer configuration information. At least one of the link radio bearers acts as a target radio bearer.

Step 54: The terminal device sends the service data on the selected target radio bearer.

Specifically, the selection of the target radio bearer is performed in the SDAP layer of the access layer protocol stack, and when the DRB is selected as the bearer of the service data transmission, the service data is sequentially passed through the PDCP layer, the RLC layer, and the MAC layer through the protocol stack corresponding to the Uu interface in the NR. And the physical layer processing is sent out through the Uu port; when the SLRB is selected as the bearer of the service data transmission, the service data is processed by the PDCP layer, the RLC layer, the MAC layer, and the physical layer through the SF-V2X Sidelink protocol stack, and then processed by the PC5. The port is sent out; correspondingly, when DRB and SLRB are simultaneously selected as bearers for service data transmission, the service data is simultaneously passed through the PDCP layer, the RLC layer, the MAC layer, and the physical layer through the protocol stack of the NR and NR-V2X Sidelink. After processing, it is sent out through Uu port and PC5 port;

Optionally, the selection of the target radio bearer may also be performed in the PDCP layer, the RLC layer, and the MAC layer, which is not limited herein.

Step 55: The receiving terminal device aggregates at the access layer or the upper layer when receiving the service data.

Specifically, for the service data transmitted simultaneously on the Uu port and the PC5 port, when the access layer receives the service data, it is processed by the corresponding protocol stack and then delivered to the upper layer, and the upper layer transmits a Transmission Control Protocol (TCP) protocol. Repeated packet detection, packet loss, and merging by the stack or a separate upper layer protocol stack; or repeated packet detection, packet loss, and merging of the received packet by the SDAP layer through the corresponding duplicate packet detection and duplicate packet discarding mechanism; or Repeated packet detection, packet loss, and merging by the PDCP layer, the RLC layer, or the MAC layer are not limited herein;

In the first embodiment, the SDAP layer is introduced in the V2X protocol stack, and the DRB and the SLRB are configured on the terminal device side for the QoS flow, and the transmission path or the target radio bearer is selected at the access layer, so that the access layer can be flexibly The transmission path is selected according to the service characteristics of the service data, which reduces the handover delay of the transmission path.

Embodiment 2

The DRB and the SLRB are established for the QoS flow of each V2X on the terminal device side. When there is V2X service data transmission, the terminal device selects the target radio bearer to perform service data according to the preset threshold configuration information, the channel load measurement result, and the signal strength measurement result. transmission. The specific process is as follows.

Step 60: The terminal device acquires configuration information, where the configuration information includes a first flow identifier and configuration information of the DRB corresponding to the first flow identifier and configuration information of the SLRB.

Step 61: The terminal device acquires the service data and the second flow identifier corresponding to the service data.

Step 62: The terminal device acquires preset threshold configuration information, where the preset threshold configuration information includes a CBR threshold and an RSRP threshold.

Optionally, the CBR threshold may include a threshold CBRthres or two thresholds CBRthresmin and CBRthresmax, where CBRthresmin is less than CBRthresmax;

Optionally, the RSRP threshold may include a threshold value RSRPthres, or two threshold values RSRPthresmin and RSRPthresmax, where RSRPthresmin is less than RSRPthresmax;

Therefore, optionally, the preset threshold configuration information may be in the form of:

CBRthres+RSRPthres, or CBRthres+RSRPthres+QoS flow ID; or

CBRthresmin+CBRthresmax+RSRPthresmin+RSRPthresmax; or

CBRthresmin+CBRthresmax+RSRPthresmin+RSRPthresmax+QoS flow ID;

Step 63: The terminal device acquires CBR and RSRP measurement results.

Specifically, when the terminal device obtains the CBR and the RSRP measurement result, the terminal device obtains the CBR and the RSRP measurement result by using the measurement, or the terminal device obtains the CBR and the RSRP measurement result from the base station, and the obtaining manner is not limited herein.

Optionally, the CBR and the RSRP measurement result of the terminal device may be performed by the RRC layer or the MAC layer of the terminal device, or may be performed by the SDAP layer, the PDCP layer, or the RLC layer of the terminal device, which is not limited herein; The corresponding protocol layer obtains the measurement result and submits it to the decision protocol layer of the terminal device. The decision protocol layer of the terminal device may be the SDAP layer, the PDCP layer, the RLC layer, the MAC layer, or even the RRC layer or the physical layer, and is not specifically limited herein. Specifically, the CBR is measured for the PC5 port, and the RSRP is measured for the Uu port.

Step 63: When the first flow identifier and the second flow identifier are the same, the terminal device selects at least one of the DRB and the SLRB as the target radio bearer according to the CBR and RSRP measurement result, the CBR threshold, and the RSRP threshold.

Specifically, the decision protocol layer of the terminal device selects the target radio bearer according to the CBR and RSRP measurement results and the preset threshold configuration information (including the CBR threshold and the RSRP threshold) and the transmission path selection criterion.

The transmission path selection criterion herein may be described in the foregoing description of the parameters, and will not be described herein.

Steps 64 to 65, refer to steps 54 to 55 of the embodiment.

In the second embodiment, the terminal device selects the target radio bearer to perform service data transmission according to the CBR threshold and the RSRP threshold and the CBR and RSRP measurement results in the preset threshold configuration information, so that the terminal can effectively transmit the service data according to the PC5 interface. The channel load condition or the wireless signal strength of the Uu interface selects an appropriate transmission path or a target radio bearer, which can balance the channel load and ensure that performance indicators such as delay and reliability of the service are guaranteed.

Embodiment 3

The DRB and the SLRB are established for the QoS flow of each V2X on the terminal device side. When there is V2X service data transmission, the terminal device selects the target radio bearer to transmit the service data according to the target radio bearer configuration information acquired from the network device. The specific process is as follows.

Step 70: The terminal device acquires configuration information, where the configuration information includes a first flow identifier and configuration information of the DRB corresponding to the first flow identifier and configuration information of the SLRB.

Step 71: The terminal device acquires the service data and the second flow identifier corresponding to the service data.

Step 72: The terminal device performs CBR and RSRP measurement, and reports the CBR and RSRP measurement results to the network device.

Specifically, the terminal device measures the CBR and the RSRP, and reports the CBR and the RSRP measurement result to the network device, including:

The terminal device measures CBR and RSRP, and periodically reports the CBR and RSRP measurement results to the network device; or

The terminal device obtains the measurement result report configuration information, and the measurement result report configuration information may include CBR report configuration information (CBRthresrpt) CBRthresrpt and RSRP report configuration information (RSRPthresrpt); and report the CBR and RSRP measurement results to the configuration result according to the measurement result. Internet equipment.

Step 73: The network device selects the target radio bearer according to the CBR and RSRP measurement results and the transmission path selection criterion.

Optionally, the network device may also select a target radio bearer according to service characteristics of the service data, or

The terminal device selects the target radio bearer according to the CBR and the RSRP measurement result and the service characteristic of the service data, and reports the selected target radio bearer to the network device.

Step 74: The terminal device acquires target radio bearer configuration information sent by the network device.

Optionally, the network device indicates the corresponding target radio bearer through a field in the SDAP PDU header; or indicates the target radio bearer by using a MAC CE, an RRC dedicated signaling, a DCI, or the like.

Step 75: When the first flow identifier and the second flow identifier are the same, the terminal device selects a corresponding target radio bearer according to the target radio bearer configuration information sent by the network device, where the target radio bearer may be selected by the SDAP layer of the terminal device. The PDCP layer, the RLC layer, the MAC layer, and the like may be implemented, and are not limited herein.

Steps 76 to 77 can refer to steps 55 to 56 in the first embodiment.

In the third embodiment, the network device selects the transmission path/target radio bearer through the target radio bearer based on the service characteristic requirement of the service data or the CBR and RSRP measurement result reported by the terminal device, or the target radio bearer reported by the terminal device. The configuration information is indicated to the terminal device. The terminal device acquires the target radio bearer configuration information, and selects the corresponding transmission path/target radio bearer to transmit the service data, so that the path device or the target radio bearer selection of the terminal device not having the measurement function is also based on the channel load, the received signal strength, The selection of service characteristics, etc., thereby reducing the transmission delay of service data.

Embodiment 4

For the case where the service data is established before the PDN connection, the default transport bearer or transmission path needs to be set.

1) The terminal device selects the transmission path or transmission bearer with the lowest channel load and the strongest received signal strength as the default transmission path or transmission bearer based on the CBR and RSRP measurement results.

2) The terminal device selects the last used transmission path or transport bearer as the default transmission path.

3) The terminal device selects a default transmission path or transmission bearer according to the service type, and needs to bind the service type to the transmission path or the transmission bearer.

4) Terminal device settings Select SRB as the default transmission path or transport bearer.

In this way, it is ensured that the service data that the terminal device arrives before the establishment of the PDN connection is transmitted on the appropriate transmission path or the transmission bearer, so that the performance of the service data is guaranteed.

Based on the above embodiment, the embodiment of the present application provides a data transmission device, corresponding to the terminal device, for implementing the method shown in FIG. 3. Referring to FIG. 5, a data transmission device 500 includes: a processing unit 501, The receiving unit 502 and the transmitting unit 503.

The processing unit 501 is configured to obtain configuration information, where the configuration information includes a first flow identifier, configuration information of the data radio bearer corresponding to the first flow identifier, and configuration information of the direct link radio bearer.

The receiving unit 502 is configured to acquire service data and a second flow identifier corresponding to the service data.

The processing unit 501 is further configured to select, according to the first flow identifier, the second flow identifier, configuration information of a data radio bearer corresponding to the first flow identifier, and configuration information of a radio link of a direct link, selecting a corresponding data wireless. Carrying at least one of a bearer and a direct link radio bearer as a target radio bearer;

The sending unit 503 is configured to transmit the service data on the target radio bearer.

Optionally, the processing unit 501 is specifically configured to:

And when the second flow identifier is the same as the first flow identifier, selecting at least one of the data radio bearer and the direct link radio bearer as a target radio bearer.

Optionally, the processing unit 501 is configured to: obtain preset threshold configuration information, where the preset threshold configuration information includes at least one of a first preset threshold and a second preset threshold, according to the measurement result and the The preset threshold configuration information selects at least one of the data radio bearer and the direct link radio bearer as a target radio bearer, where the first preset threshold includes at least one channel load preset threshold; the second pre- Setting a threshold to include at least one signal strength preset threshold; the measurement result including at least one of a channel load measurement result and a signal strength measurement result; or

Obtaining the service characteristic configuration information, the processing unit 501 is specifically configured to: select at least one of the data radio bearer and the direct link radio bearer according to the service characteristic configuration information and the service characteristic of the service data Target radio bearer; or

Optionally, the processing unit 501 is specifically configured to:

Optionally, the processing unit 501 is specifically configured to: obtain service characteristic configuration information, where the service feature configuration information includes a first service feature and target radio bearer configuration information corresponding to the first service feature; and acquiring the service data. Corresponding second service characteristic; selecting at least one of the data radio bearer and the direct link radio bearer as a target radio bearer according to the second service characteristic and the service characteristic configuration information;

The service feature includes at least one of a priority, a service type, a source identifier, a destination identifier, a delay, a reliability, and a speed.

Optionally, the processing unit 501 is specifically configured to:

Obtaining the measurement result, and reporting, by the sending unit 503, the measurement result to the network device, and acquiring, by the receiving unit 502, target radio bearer configuration information from the network device, according to the target radio bearer configuration information. Selecting at least one of the data radio bearer and the direct link radio bearer as a target radio bearer; or

Obtaining the measurement result, selecting at least one of the data radio bearer and the direct link radio bearer as a target radio bearer according to the measurement result and the preset threshold configuration information, by using the sending unit 503 And the selected target radio bearer or target radio bearer configuration information is reported to the network device, and the target radio bearer configuration information is obtained from the network device by using the receiving unit 502, and the selected radio bearer configuration information is selected according to the target radio bearer configuration information. At least one of the data radio bearer and the direct link radio bearer is referred to as a target radio bearer.

Optionally, when the processing unit 501 acquires the target radio bearer configuration information from the network device, specifically:

Acquiring, by using radio resource control RRC signaling, target radio bearer configuration information sent by the network device; or

Obtaining target radio bearer configuration information sent by the network device by using a field in a service data adaptation protocol SDAP protocol data unit PDU header; or

Obtaining target radio bearer configuration information sent by the network device by using a media intervention control element MAC CE signaling; or

Obtaining target radio bearer configuration information sent by the network device by using downlink control information DCI.

Optionally, when the processing unit 501 selects at least one of the data radio bearer and the direct link radio bearer as the target radio bearer, specifically:

Obtaining, by the first protocol layer of the terminal device, the measurement result, and selecting a target radio bearer according to the measurement result, and transmitting, by using a first protocol layer of the terminal device, service data on the target radio bearer; or

Acquiring the measurement result by using the second protocol layer of the terminal device, and selecting a target radio bearer according to the measurement result, and transmitting the service data on the target radio bearer by using the first protocol layer of the terminal device, where The first protocol layer is an SDAP layer; or the first protocol layer is one of an RRC layer, a packet data convergence protocol PDCP layer, a radio connection control RLC layer, and a MAC layer; the second protocol layer is an RRC layer or The MAC layer, or the second protocol layer, is one of a SDAP layer, a PDCP layer, an RCL layer, and a physical PHY layer.

Optionally, the at least one channel load preset threshold includes: a first channel load preset threshold; or the at least one channel load preset threshold includes a first channel load preset threshold and a second channel load preset threshold ;

The at least one signal strength preset threshold includes a first signal strength preset threshold; or

The at least one signal strength preset threshold includes a first signal strength preset threshold and a second preset signal strength preset threshold.

Optionally, the processing unit 501 is specifically configured to:

It should be understood that the division of each unit above is only a division of logical functions, and the actual implementation may be integrated into one physical entity in whole or in part, or may be physically separated. Moreover, these units may all be implemented in the form of software by means of processing component calls; or may be implemented entirely in hardware; some units may be implemented in software in the form of processing component calls, and some units may be implemented in hardware. For example, the processing unit may be a separately set processing element, or may be integrated in a certain chip. Alternatively, it may be stored in a memory in the form of a program, and a function of the unit is called and executed by a certain processing element. The implementation of other units is similar. In addition, all or part of these units can be integrated or implemented independently. The processing elements described herein can be an integrated circuit with signal processing capabilities. In the implementation process, each step of the above method or each of the above units may be completed by an integrated logic circuit of hardware in the processor element or an instruction in a form of software. In addition, the above receiving unit is a unit for controlling reception, and can receive information through a receiving device of a terminal device or a network device, such as an antenna and a radio frequency device. The above sending unit is a unit for controlling transmission, and can transmit information through a transmitting device of a terminal device or a network device, such as an antenna and a radio frequency device.

For example, the above units may be one or more integrated circuits configured to implement the above methods, such as one or more application specific integrated circuits (ASICs), or one or more digital signal processors ( Digital signal processor (DSP), or one or more field programmable gate arrays (FPGAs), and the like. As another example, when one of the above units is implemented in the form of a processing component scheduler, the processing element can be a general purpose processor, such as a central processing unit (CPU) or other processor that can invoke the program. As another example, these units can be integrated and implemented in the form of a system-on-a-chip (SOC).

Based on the above embodiment, the present application further provides a terminal device for implementing the method shown in FIG. 3. Referring to FIG. 6, the terminal device 600 includes: a receiver 601, a processor 602, a memory 603, and Transmitter 604.

The memory 603 is configured to store computer executable instructions; when the processor 802 executes the computer executable instructions, causes the terminal device 600 to perform the method illustrated in FIG. 3 above.

It can be understood that the data transmission device in the above embodiment shown in FIG. 5 can be implemented by the terminal device 600 shown in FIG. 6. The structure of the terminal device 600 does not constitute a limitation on the embodiments of the present application.

In FIG. 6, the processor 602 can be a central processing unit (CPU), a network processor (NP), a hardware chip, or any combination thereof. The memory may include a volatile memory such as a random access memory (RAM); the memory may also include a non-volatile memory such as a read-only memory. , ROM), flash memory, hard disk drive (HDD) or solid-state drive (SSD); the memory may also include a combination of the above types of memory.

Those skilled in the art will appreciate that embodiments of the present application can be provided as a method, system, or computer program product. Therefore, the embodiments of the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware. Moreover, embodiments of the present application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.

Embodiments of the present application are described with reference to flowchart illustrations and/or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present application. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

It is apparent that those skilled in the art can make various modifications and variations to the embodiments of the present application without departing from the spirit and scope of the application. Thus, it is intended that the present invention cover the modifications and variations of the embodiments of the present invention.

Claims

A data transmission method, comprising:

The terminal device acquires configuration information, where the configuration information includes a first flow identifier, configuration information of the data radio bearer corresponding to the first flow identifier, and configuration information of the radio link of the direct link;

The terminal device acquires service data and a second flow identifier corresponding to the service data;

The terminal device selects a corresponding data radio bearer and a direct link according to the first flow identifier, the second flow identifier, the configuration information of the data radio bearer corresponding to the first flow identifier, and the configuration information of the radio link of the direct link. At least one of the path radio bearers is the target radio bearer;

The terminal device transmits the service data on the target radio bearer.
The method according to claim 1, wherein the terminal device according to the first flow identifier, the second flow identifier, configuration information of a data radio bearer corresponding to the first stream identifier, and direct link wireless The configuration information of the bearer selects at least one of the corresponding data radio bearer and the direct link radio bearer as the target radio bearer, including

When the second flow identifier is the same as the first flow identifier, the terminal device selects at least one of the data radio bearer and the direct link radio bearer as a target radio bearer.
The method according to claim 2, wherein the terminal device selects at least one of the data radio bearer and the direct link radio bearer as a target radio bearer, including:

The terminal device acquires preset threshold configuration information, where the preset threshold configuration information includes at least one of a first preset threshold and a second preset threshold, and the terminal device performs configuration information according to the measurement result and the preset threshold. Selecting at least one of the data radio bearer and the direct link radio bearer as the target radio bearer, the first preset threshold includes at least one channel load preset threshold; and the second preset threshold includes at least one a signal strength preset threshold; the measurement result comprising at least one of a channel load measurement result and a signal strength measurement result; or

The terminal device acquires service characteristic configuration information, and the terminal device selects at least one of the data radio bearer and the direct link radio bearer as a target according to the service characteristic configuration information and the service characteristic of the service data. Wireless bearer; or

The terminal device acquires target radio bearer configuration information from the network device, and the terminal device selects at least one of the data radio bearer and the direct link radio bearer as the target radio bearer according to the target radio bearer configuration information.
The method according to claim 3, wherein the terminal device selects at least one of the data radio bearer and the direct link radio bearer as a target radio according to the measurement result and the preset threshold configuration information. Hosting, including:

The terminal device selects at least one of the data radio bearer and the direct link radio bearer as a target radio bearer according to the at least one channel load preset threshold and the at least one channel load measurement result; or

The terminal device selects at least one of the data radio bearer and the direct link radio bearer as a target radio bearer according to the at least one signal strength preset threshold and the at least one signal strength measurement result; or

The terminal device selects the data radio bearer according to the at least one channel load preset threshold, the at least one signal strength preset threshold, the at least one channel load measurement result, and the at least one signal strength measurement result. At least one of the direct link radio bearers is referred to as a target radio bearer.
The method according to claim 3, wherein the terminal device acquires service characteristic configuration information, and the terminal device selects the data radio bearer and the service according to the service characteristic configuration information and the service characteristic of the service data. At least one of the direct link radio bearers is used as the target radio bearer, including:

The terminal device acquires service characteristic configuration information, where the service feature configuration information includes a first service feature and target radio bearer configuration information corresponding to the first service feature;

The terminal device acquires a second service characteristic corresponding to the service data;

The terminal device selects at least one of the data radio bearer and the direct link radio bearer as a target radio bearer according to the second service characteristic and the service characteristic configuration information;

The service feature includes at least one of a priority, a service type, a source identifier, a destination identifier, a delay, a reliability, and a speed.
The method according to claim 3, wherein the terminal device acquires target radio bearer configuration information from the network device, and the terminal device selects the data radio bearer and the direct link according to the target radio bearer configuration information. At least one of the radio bearers is a target radio bearer, including:

The terminal device acquires the measurement result, reports the measurement result to the network device, and acquires target radio bearer configuration information from the network device, where the terminal device selects the information according to the target radio bearer configuration information. At least one of a data radio bearer and the direct link radio bearer is a target radio bearer; or

The terminal device acquires the measurement result, and selects at least one of the data radio bearer and the direct link radio bearer as a target radio bearer according to the measurement result and the preset threshold configuration information, where The selected target radio bearer or the target radio bearer configuration information is reported to the network device, and the target radio bearer configuration information is obtained from the network device, and the terminal device selects the data radio according to the target radio bearer configuration information. At least one of the bearer and the directly connected link radio bearer acts as a target radio bearer.
The method according to claim 3, wherein the acquiring, by the terminal device, the target radio bearer configuration information from the network device comprises:

Obtaining, by the terminal device, the target radio bearer configuration information sent by the network device by using radio resource control RRC signaling; or

Obtaining, by the terminal device, the target radio bearer configuration information sent by the network device by using a field in a service data adaptation protocol SDAP protocol data unit PDU header; or

Obtaining, by the terminal device, the target radio bearer configuration information sent by the network device by using a media intervention control element MAC CE signaling; or

The terminal device acquires target radio bearer configuration information sent by the network device by using downlink control information DCI.
The method according to claim 3, wherein the terminal device selects at least one of the data radio bearer and the direct link radio bearer as a target radio bearer, including:

Obtaining, by the first protocol layer of the terminal device, the measurement result, and selecting a target radio bearer according to the measurement result, where the first protocol layer of the terminal device transmits service data on the target radio bearer; or

The second protocol layer of the terminal device acquires the measurement result, and selects a target radio bearer according to the measurement result, where the first protocol layer of the terminal device transmits service data on the target radio bearer, where the The first protocol layer is an SDAP layer; or the first protocol layer is one of an RRC layer, a packet data convergence protocol PDCP layer, a radio connection control RLC layer, and a MAC layer; the second protocol layer is an RRC layer or a MAC layer. Or the second protocol layer is one of a SDAP layer, a PDCP layer, an RCL layer, and a physical PHY layer.
The method according to claim 3, wherein the at least one channel load preset threshold comprises: a first channel load preset threshold; or the at least one channel load preset threshold comprises a first channel load preset Threshold and second channel load preset threshold;

The at least one signal strength preset threshold includes a first signal strength preset threshold; or

The at least one signal strength preset threshold includes a first signal strength preset threshold and a second preset signal strength preset threshold.
The method according to claim 9, wherein the terminal device presets a threshold according to the at least one channel load, the at least one signal strength preset threshold, the at least one channel load measurement result, and the at least A signal strength measurement result selects at least one of the data radio bearer and the direct link radio bearer as a target radio bearer, including:

When the channel load measurement result is greater than or equal to the first channel load preset threshold and/or the signal strength measurement result is greater than or equal to the first signal strength preset threshold, the terminal device selects Determining the data radio bearer as the target radio bearer; or

When the channel load measurement result is less than or equal to the first channel load preset threshold and/or the signal strength measurement result is less than or equal to the first signal strength preset threshold, the terminal device selects Determining the direct link radio bearer as the target radio bearer; or

The terminal device selects the data when the channel load measurement result is less than or equal to the first channel load preset threshold and the signal strength measurement result is greater than or equal to the first signal strength preset threshold. a radio bearer or the direct link radio bearer as a target radio bearer; or

Selecting the data radio bearer and the data when the load measurement result is greater than or equal to the first channel load preset threshold and the signal strength measurement result is less than or less than the first signal strength preset threshold. Directly connecting the link radio bearer as the target radio bearer; or

When the channel load measurement result is greater than or equal to the second channel load preset threshold and/or the signal strength measurement result is greater than or equal to the second signal strength preset threshold, the terminal device selects Determining the data radio bearer as the target radio bearer; or

When the channel load measurement result is less than or equal to the first channel load preset threshold and/or the signal strength measurement result is less than or equal to the first signal strength preset threshold, the terminal device selects Determining the direct link radio bearer as the target radio bearer; or

The terminal device selects the data when the channel load measurement result is less than or equal to the first channel load preset threshold and the signal strength measurement result is greater than or equal to the signal strength second preset threshold. a radio bearer or the direct link radio bearer as a target radio bearer; or

The terminal device selects the data when the channel load measurement result is greater than or equal to the second channel load preset threshold and the signal strength measurement result is less than or equal to the signal strength first preset threshold. The radio bearer and the direct link radio bearer are the target radio bearers.
A data transmission device is applied to a terminal device, and includes:

a processing unit, configured to acquire configuration information, where the configuration information includes a first flow identifier, configuration information of a data radio bearer corresponding to the first flow identifier, and configuration information of a radio link of a direct link;

a receiving unit, configured to acquire service data and a second stream identifier corresponding to the service data;

The processing unit is further configured to select a corresponding data radio bearer according to the first flow identifier, the second flow identifier, configuration information of a data radio bearer corresponding to the first flow identifier, and configuration information of a radio link of a direct link And at least one of the direct link radio bearers being the target radio bearer;

And a sending unit, configured to transmit the service data on the target radio bearer.
The device according to claim 11, wherein the processing unit is specifically configured to:

And when the second flow identifier is the same as the first flow identifier, selecting at least one of the data radio bearer and the direct link radio bearer as a target radio bearer.
The device according to claim 12, wherein the processing unit is configured to: acquire preset threshold configuration information, where the preset threshold configuration information includes at least one of a first preset threshold and a second preset threshold. And selecting, according to the measurement result and the preset threshold configuration information, at least one of the data radio bearer and the direct link radio bearer as a target radio bearer, where the first preset threshold includes at least one channel load pre Setting a threshold; the second preset threshold includes at least one signal strength preset threshold; the measurement result includes at least one of a channel load measurement result and a signal strength measurement result; or

Obtaining service characteristic configuration information, where the processing unit is configured to: select at least one of the data radio bearer and the direct link radio bearer as a target according to the service characteristic configuration information and the service characteristic of the service data Wireless bearer; or

Obtaining target radio bearer configuration information from the network device, and selecting at least one of the data radio bearer and the direct link radio bearer as the target radio bearer according to the target radio bearer configuration information.
The device according to claim 13, wherein the processing unit is specifically configured to:

Selecting at least one of the data radio bearer and the direct link radio bearer as a target radio bearer according to the at least one channel load preset threshold and the at least one channel load measurement result; or

Selecting at least one of the data radio bearer and the direct link radio bearer as a target radio bearer according to the at least one signal strength preset threshold and the at least one signal strength measurement result; or

Selecting the data radio bearer and the direct link according to the at least one channel load preset threshold, the at least one signal strength preset threshold, the at least one channel load measurement result, and the at least one signal strength measurement result At least one of the path radio bearers acts as a target radio bearer.
The device according to claim 13, wherein the processing unit is configured to: obtain service characteristic configuration information, where the service feature configuration information includes a first service feature and a target radio bearer corresponding to the first service feature. Configuring information, acquiring a second service characteristic corresponding to the service data, and selecting at least one of the data radio bearer and the direct link radio bearer as a target according to the second service characteristic and the service characteristic configuration information Radio bearer

The service feature includes at least one of a priority, a service type, a source identifier, a destination identifier, a delay, a reliability, and a speed.
The device according to claim 13, wherein the processing unit is specifically configured to:

Acquiring the measurement result, reporting the measurement result to the network device by using the sending unit, acquiring target radio bearer configuration information from the network device by using the receiving unit, and selecting the location according to the target radio bearer configuration information Determining at least one of a data radio bearer and the direct link radio bearer as a target radio bearer; or

Acquiring the measurement result, selecting at least one of the data radio bearer and the direct link radio bearer as the target radio bearer according to the measurement result and the preset threshold configuration information, where the sending unit The selected target radio bearer or target radio bearer configuration information is reported to the network device, and the target radio bearer configuration information is obtained from the network device by the receiving unit, and the data is selected according to the target radio bearer configuration information. At least one of a radio bearer and the direct link radio bearer is a target radio bearer.
The device according to claim 13, wherein the processing unit is configured to: when acquiring the target radio bearer configuration information from the network device, specifically:

Acquiring, by using radio resource control RRC signaling, target radio bearer configuration information sent by the network device; or

Obtaining target radio bearer configuration information sent by the network device by using a field in a service data adaptation protocol SDAP protocol data unit PDU header; or

Obtaining target radio bearer configuration information sent by the network device by using a media intervention control element MAC CE signaling; or

Obtaining target radio bearer configuration information sent by the network device by using downlink control information DCI.
The apparatus according to claim 13, wherein when the processing unit selects at least one of the data radio bearer and the direct link radio bearer as a target radio bearer, specifically:

Obtaining, by the first protocol layer of the terminal device, the measurement result, and selecting a target radio bearer according to the measurement result, and transmitting, by using a first protocol layer of the terminal device, service data on the target radio bearer; or

Acquiring the measurement result by using the second protocol layer of the terminal device, and selecting a target radio bearer according to the measurement result, and transmitting the service data on the target radio bearer by using the first protocol layer of the terminal device, where The first protocol layer is an SDAP layer; or the first protocol layer is one of an RRC layer, a packet data convergence protocol PDCP layer, a radio connection control RLC layer, and a MAC layer; the second protocol layer is an RRC layer or The MAC layer, or the second protocol layer, is one of a SDAP layer, a PDCP layer, an RCL layer, and a physical PHY layer.
The apparatus according to claim 13, wherein the at least one channel load preset threshold comprises: a first channel load preset threshold; or the at least one channel load preset threshold comprises a first channel load preset Threshold and second channel load preset threshold;

The at least one signal strength preset threshold includes a first signal strength preset threshold; or

The at least one signal strength preset threshold includes a first signal strength preset threshold and a second preset signal strength preset threshold.
The device according to claim 19, wherein the processing unit is specifically configured to:

Selecting the data radio bearer when the channel load measurement result is greater than or equal to the first channel load preset threshold and/or the signal strength measurement result is greater than or equal to the first signal strength preset threshold. As the target radio bearer; or

Selecting the direct link when the channel load measurement result is less than or equal to the first channel load preset threshold and/or the signal strength measurement result is less than or equal to the first signal strength preset threshold The radio bearer is the target radio bearer; or

Selecting the data radio bearer when the channel load measurement result is less than or equal to the first channel load preset threshold and the signal strength measurement result is greater than or equal to the first signal strength preset threshold. Or the direct link radio bearer is the target radio bearer; or

Selecting the data radio bearer and the data when the load measurement result is greater than or equal to the first channel load preset threshold and the signal strength measurement result is less than or less than the first signal strength preset threshold. Directly connecting the link radio bearer as the target radio bearer; or

Selecting the data radio bearer when the channel load measurement result is greater than or equal to the second channel load preset threshold and/or the signal strength measurement result is greater than or equal to the second signal strength preset threshold. As the target radio bearer; or

Selecting the direct link when the channel load measurement result is less than or equal to the first channel load preset threshold and/or the signal strength measurement result is less than or equal to the first signal strength preset threshold The radio bearer is the target radio bearer; or

Selecting the data radio bearer or the channel when the channel load measurement result is less than or equal to the first channel load preset threshold and the signal strength measurement result is greater than or equal to the signal strength second preset threshold. Determining the direct link radio bearer as the target radio bearer; or

Selecting the data radio bearer and the channel when the channel load measurement result is greater than or equal to the second channel load preset threshold and the signal strength measurement result is less than or equal to the signal strength first preset threshold. The direct link radio bearer is referred to as a target radio bearer.
A computer program product, wherein the computer program product is operative to perform the method of any of claims 1-10.
A computer readable storage medium, characterized in that the computer readable storage medium has a computer program for performing the method of any of claims 1-10 when the computer program is executed.
A system chip, characterized in that the system chip is used to execute a computer program for performing the method of any of claims 1-10.
A communication system, characterized in that the communication system comprises any one or more of the following:

A device according to any of claims 11-20;

A computer program product according to claim 21;

A computer readable storage medium as claimed in claim 22; or

The system chip of claim 23.