WO2023088165A1

WO2023088165A1 - Data transmission method and apparatus

Info

Publication number: WO2023088165A1
Application number: PCT/CN2022/131160
Authority: WO
Inventors: 金辉; 窦凤辉
Original assignee: 华为技术有限公司
Priority date: 2021-11-22
Filing date: 2022-11-10
Publication date: 2023-05-25
Also published as: CN116155800A

Abstract

Provided in the present application are a data transmission method and apparatus. The method comprises: a terminal device sending first instruction information to a network device by means of a first communication path, wherein the first instruction information is used for instructing the establishment of a first QoS flow in the first communication path or a second communication path, and the first QoS flow is used for transmitting data of the terminal device; and the terminal device receiving first resource configuration information, wherein the first resource configuration information is used for configuring an access network resource for the first QoS flow, and the first communication path is a direct path and the second communication path is an indirect path, or the first communication path is an indirect path and the second communication path is a direct path. In the method, by means of an instruction of a terminal device and a configuration of a first access network device, the establishment of a first QoS flow can be implemented in a first communication path or a second communication path, thereby preventing data of a service from being transmitted using a fixed communication path, such that the requirement of service transmission can be dynamically satisfied.

Description

A method and device for data transmission

This application claims the priority of a Chinese patent application with an application date of November 22, 2021, an application number of 202111383206.3, and an application title of "A Method for Data Transmission", the entire contents of which are incorporated in this application by reference.

This application claims the priority of a Chinese patent application with an application date of January 27, 2022, an application number of 202210098312.5, and an application title of "A Method and Device for Data Transmission", the entire contents of which are incorporated in this application by reference.

technical field

The embodiments of the present application relate to the communication field, and more specifically, to a data transmission method and device.

Background technique

A user equipment (user equipment, UE) can communicate with a data network (data network, DN) through two paths. One is that the user equipment directly accesses the operator network (for example, a base station), and communicates with the DN through the operator network. This path can be called a direct path; the other is that the user equipment passes through a relay (relay path). ) The device is connected to the operator network, and then communicates with the DN through the operator network. This path can be called an indirect path (indirect path).

In the prior art, user equipment uses a certain fixed path (direct path or indirect path) to transmit service data, which cannot dynamically meet service transmission requirements, such as delay, communication quality, or communication capacity.

Contents of the invention

The embodiments of the present application provide a method and device for data transmission, so that the transmission paths between the terminal equipment and the data network are diversified, and the requirements of service transmission can be dynamically met.

In a first aspect, a data transmission method is provided, and the method may be executed by a terminal device, or may also be executed by a chip or a circuit configured in the terminal device, which is not limited in the present application. The following takes execution by a terminal device as an example for description.

The method includes: the terminal device sends a first request message to the network device through the first communication path, the first request message includes first indication information, and the first indication information is used to indicate that the first communication path or the second communication path is established A first quality of service (quality of service, QoS) flow (flow), the first QoS flow is used to transmit data of the terminal device; the terminal device receives first resource configuration information, and the first resource configuration information is used to configure the first QoS flow The access network resource, wherein, the first communication path is a direct connection path, and the second communication path is a non-direct connection path; or, the first communication path is a non-direct connection path, and the second communication path is a direct connection path.

According to the above solution, the terminal device can send the first instruction information to the network device through the first communication path, indicating that the first QoS flow is established on the first communication path or the second communication path, and the first access network device sends the first QoS flow to the network device through the first communication path. The terminal device sends first resource configuration information to configure access network resources of the first QoS flow, where the first resource configuration information is determined according to the first indication information and the first QoS configuration information. In this method, through the instruction of the terminal device and the configuration of the first access network device, the first QoS flow can be established on the first communication path or the second communication path, avoiding the use of a fixed communication path to transmit service data, It can dynamically meet the needs of business transmission.

With reference to the first aspect, in some implementations of the first aspect, the first indication information is used to indicate the establishment of the first QoS flow on the first communication path, and the method further includes: the terminal device sends the network device the first QoS flow through the first communication path Sending a second request message, where the second request message includes second indication information, the second indication information is used to indicate the establishment of a second QoS flow on the second communication path, and the second QoS flow is used to transmit data of the terminal device; the terminal device receives Second resource configuration information, where the second resource configuration information is used to configure access network resources of the second QoS flow.

With reference to the first aspect, in some implementations of the first aspect, the first indication information is used to indicate the establishment of the first QoS flow on the first communication path, and the method further includes: the terminal device sends the network device the first QoS flow through the first communication path sending a third request message, where the third request message includes third indication information and QoS flow identification information of the third QoS flow, where the third indication information is used to indicate that the third QoS flow is transferred to the second communication path, and the third The QoS flow is at least one of the first QoS flows; the terminal device receives third resource configuration information, where the third resource configuration information is used to configure access network resources of the third QoS flow.

With reference to the first aspect, in some implementations of the first aspect, the third resource configuration information is specifically used to: allocate access network resources of the third QoS flow on the second communication path; delete the third QoS flow on the first Access network resources for communication paths.

With reference to the first aspect, in some implementations of the first aspect, the third resource configuration information is specifically used to allocate access network resources of the third QoS flow on the second communication path, and the method further includes: the terminal device receives the first Fourth, configuration information, where the fourth configuration information is used to delete the access network resources of the third QoS flow on the first communication path.

With reference to the first aspect, in some implementation manners of the first aspect, the first request message further includes fourth indication information, where the fourth indication information is used to indicate the session management function device that supports multipath.

With reference to the first aspect, in some implementation manners of the first aspect, the first communication path is a path through which the terminal device directly connects to the first access network device, and the first indication information is used to indicate that the first communication path is established on the first communication path. For a QoS flow, the first resource configuration information includes configuration information of a Uu interface between the terminal device and the first access network device.

With reference to the first aspect, in some implementation manners of the first aspect, the first communication path is a path through which the terminal device directly connects to the first access network device, and the first indication information is used to indicate that the first communication path is established on the second communication path. QoS flow, the method further includes: the terminal device sends the cell identifier of the first relay terminal device, the cell identifier of the first relay terminal device is used to determine the access network device of the first relay terminal device, and the second communication path The device includes a first relay terminal device.

With reference to the first aspect, in some implementation manners of the first aspect, the terminal device sending the cell identity of the first relay terminal device includes: the terminal device sending a first measurement report to the first access network device, and the first The measurement report includes the cell identity of at least one relay terminal device and the signal strength of the ProSe communication PC5 of at least one relay terminal device, where the at least one relay terminal device includes a first relay terminal device, and the at least one relay terminal device's The signal strength of PC5 is used to determine the first relay terminal device; or, the terminal device sends a radio resource control RRC message to the first access network device, and the RRC message includes the cell identifier of the first relay terminal device; or, the first The request message includes the cell identifier of the first relay terminal device.

With reference to the first aspect, in some implementations of the first aspect, the access network device of the first relay terminal device is the first access network device, and the second communication path is that the terminal device passes through the first relay terminal device The path connecting the first access network device, the first resource configuration information includes the configuration information of the PC5 interface between the terminal device and the first relay terminal device, and the configuration information of the Uu interface between the terminal device and the first access network device configuration information.

With reference to the first aspect, in some implementations of the first aspect, the access network device of the first relay terminal device is a second access network device, and the second communication path is that the terminal device passes through the first relay terminal device The path connecting the second access network device, the first resource configuration information includes the configuration information of the PC5 interface between the terminal device and the first relay terminal device, and the configuration information of the Uu interface between the terminal device and the second access network device configuration information.

With reference to the first aspect, in some implementation manners of the first aspect, the first communication path is a path through which the terminal device connects to the first access network device through the first relay terminal device, and the first indication information is used to indicate the The first communication path establishes the first QoS flow, and the first resource configuration information includes the configuration information of the PC5 interface between the terminal device and the first relay terminal device, and the Uu interface between the terminal device and the first access network device configuration information.

With reference to the first aspect, in some implementation manners of the first aspect, the first communication path is a path for the terminal device to connect to the first access network device through the first relay terminal device, and the first indication information is used to indicate the Two communication paths establish the first QoS flow, and the method further includes: the terminal device sends a second measurement report to the first access network device, the second measurement report includes the cell signal strength of the cell where the terminal device can reside, and the cell signal Strength is used to determine the access network equipment of the terminal device.

With reference to the first aspect, in some implementation manners of the first aspect, the access network device of the terminal device is the first access network device, and the second communication path is a path for the terminal device to directly connect to the first access network device, The first resource configuration information includes configuration information of a Uu interface between the terminal device and the first access network device.

With reference to the first aspect, in some implementation manners of the first aspect, the access network device of the terminal device is a second access network device, and the second communication path is a path for the terminal device to directly connect to the second access network device, The first resource configuration information includes configuration information of a Uu interface between the terminal device and the second access network device.

In the second aspect, a data transmission method is provided, which may be executed by the first access network device, or may also be executed by a chip or circuit configured in the first access network device, and this application does not make any limited. The following takes execution by the first access network device as an example for description.

The method includes: the first access network device receives first indication information and first quality of service QoS configuration information, where the first indication information is used to indicate establishment of a first QoS flow on a first communication path or a second communication path, and the first indication information The QoS configuration information is used to determine the access network resources of the first QoS flow, and the first QoS flow is used to transmit the data of the terminal device; the first access network device sends the first resource configuration information to the terminal device through the first communication path, The first resource configuration information is determined according to the first indication information and the first QoS configuration information, and the first resource configuration information is used to configure access network resources of the first QoS flow; wherein, the first communication path is a direct path, and the first The second communication path is a non-direct connection path; or, the first communication path is a non-direct connection path, and the second communication path is a direct connection path.

With reference to the second aspect, in some implementations of the second aspect, the first indication information is used to instruct establishment of the first QoS flow on the first communication path, and the method further includes: the first access network device receives the second indication information and second QoS configuration information, the second indication information is used to indicate the establishment of a second QoS flow on the second communication path, the second QoS configuration information is used to determine the access network resources of the second QoS flow, the second QoS The stream is used to transmit data of the terminal device; the first access network device sends second resource configuration information to the terminal device through the first communication path, the second resource configuration information is determined according to the second indication information and the second QoS configuration information, and the first The second resource configuration information is used to configure the access network resources of the second QoS flow.

With reference to the second aspect, in some implementations of the second aspect, the first indication information is used to instruct establishment of the first QoS flow on the first communication path, and the method further includes: the first access network device receives the third indication information, third QoS configuration information, and QoS flow identification information of the third QoS flow, the third indication information is used to indicate that the third QoS flow is transferred to the second communication path, and the third QoS configuration information is used to determine the first QoS flow The third QoS flow is at least one of the first QoS flows; the first access network device sends third resource configuration information to the terminal device through the first communication path, and the third resource configuration information is based on the first The third indication information is determined by the third QoS configuration information, and the third resource configuration information is used to configure the access network resources of the third QoS flow.

With reference to the second aspect, in some implementations of the second aspect, the third resource configuration information is specifically used to: allocate access network resources of the third QoS flow on the second communication path; delete the third QoS flow on the first Access network resources for communication paths.

With reference to the second aspect, in some implementation manners of the second aspect, the third resource configuration information is specifically used to allocate access network resources of the third QoS flow on the second communication path, and the method further includes: first accessing The network device sends fourth configuration information, where the fourth configuration information is used to delete the access network resources of the third QoS flow on the first communication path.

With reference to the second aspect, in some implementations of the second aspect, the first communication path is a path through which the terminal device directly connects to the first access network device, and the first indication information is used to indicate that the first communication path is established on the first communication path. For a QoS flow, the first resource configuration information includes configuration information of a Uu interface between the terminal device and the first access network device.

With reference to the second aspect, in some implementation manners of the second aspect, the first communication path is a path through which the terminal device directly connects to the first access network device, and the first indication information is used to indicate that the second communication path is established on the second communication path. A QoS flow, the method further includes: the first access network device acquires the cell identity of the first relay terminal device, the device of the second communication path includes the first relay terminal device; the first access network device obtains the cell identifier of the first relay terminal device; The cell identifier of the relay terminal device determines the access network device of the first relay terminal device.

With reference to the second aspect, in some implementation manners of the second aspect, the acquiring the cell identity of the first relay terminal device by the first access network device includes: the first access network device according to the cell identity of at least one relay terminal device The signal strength of the ProSe communication PC5 determines the first relay terminal device and the cell identity of the first relay terminal device; or, the first access network device receives a radio resource control RRC message from the terminal device, and the RRC message includes the first relay terminal device The cell identifier of the terminal device; or, the first access network device receives a first message from the first session management function device or the access and mobility management function device, where the first message includes the cell identifier of the first relay terminal device .

With reference to the second aspect, in some implementations of the second aspect, the access network device of the first relay terminal device is the first access network device, and the second communication path is that the terminal device passes through the first relay terminal device The path connecting the first access network device, the first resource configuration information includes the configuration information of the ProSe communication PC5 interface between the terminal device and the first relay terminal device, and the configuration information of the ProSe communication PC5 interface between the terminal device and the first access network device Configuration information of the Uu interface.

With reference to the second aspect, in some implementations of the second aspect, the method further includes: the first access network device sending fifth resource configuration information to the first relay terminal device, where the fifth resource configuration information includes the terminal device The configuration information of the PC5 interface between the first relay terminal device and the configuration information of the Uu interface between the first relay terminal device and the first access network device.

With reference to the second aspect, in some implementations of the second aspect, the access network device of the first relay terminal device is a second access network device, and the second communication path is that the terminal device passes through the first relay terminal device The path connecting the second access network device, the first resource configuration information includes the configuration information of the PC5 interface between the terminal device and the first relay terminal device, and the configuration information of the Uu interface between the terminal device and the second access network device configuration information.

With reference to the second aspect, in some implementation manners of the second aspect, the method further includes: the first access network device sends a second message to the second access network device, where the second message includes the first QoS configuration information; the second An access network device receives first resource configuration information from a second access network device.

With reference to the second aspect, in some implementation manners of the second aspect, the second message further includes identification information of the terminal device.

With reference to the second aspect, in some implementation manners of the second aspect, the second access network device is configured to send sixth resource configuration information to the first relay terminal device, where the sixth resource configuration information includes the terminal device and the first relay terminal device. Configuration information of a PC5 interface between relay terminal devices, and configuration information of a Uu interface between the first relay terminal device and the second access network device.

With reference to the second aspect, in some implementations of the second aspect, the first communication path is a path for the terminal device to connect to the first access network device through the first relay terminal device, and the first indication information is used to indicate A communication path establishes a first QoS flow, and the first resource configuration information includes the configuration information of the PC5 interface between the terminal device and the first relay terminal device, and the configuration of the Uu interface between the terminal device and the first access network device information.

With reference to the second aspect, in some implementation manners of the second aspect, the first communication path is a path for the terminal device to connect to the first access network device through the first relay terminal device, and the first indication information is used to indicate the The second communication path establishes the first QoS flow, and the method further includes: the first access network device determines the access network device of the terminal device according to the cell signal strength of the cell where the terminal device can reside.

With reference to the second aspect, in some implementation manners of the second aspect, the access network device of the terminal device is the first access network device, and the second communication path is a path for the terminal device to directly connect to the first access network device, The first resource configuration information includes configuration information of a Uu interface between the terminal and the first access network device.

With reference to the second aspect, in some implementation manners of the second aspect, the access network device of the terminal device is a second access network device, and the second communication path is a path for the terminal device to directly connect to the second access network device, The first resource configuration information includes configuration information of a Uu interface between the terminal device and the second access network device.

With reference to the second aspect, in some implementation manners of the second aspect, the method further includes: the first access network device sends a third message to the second access network device, where the third message includes the first QoS configuration information; the second An access network device receives first resource configuration information from a second access network device.

With reference to the second aspect, in some implementation manners of the second aspect, the third message further includes identification information of the terminal device.

In the third aspect, a data transmission method is provided, and the method may be executed by an access and mobility management functional device, or may also be executed by a chip or a circuit configured in the access and mobility management functional device. Applications are not limited to this. The following takes the implementation by the access and mobility management function device as an example for description.

The access and mobility management function device receives the first request message, the first request message includes fourth indication information, and the fourth indication information is used to indicate the session management function device that supports multi-path communication; access and mobility management The functional device determines the first session management functional device according to the fourth indication information, where the first session management functional device supports multipath communication.

According to the solution above, the access and mobility management function device may receive the first request message, and determine the first session management function device according to the fourth indication information in the first request message, and the first session management function device supports multipath communication. In this method, the first session management function device determined by the access and mobility management function can support multi-path communication, so that the first session management function device, the first access network device and the terminal device work together on the first communication path or The second communication path establishes the first QoS flow, which avoids using a fixed communication path to transmit service data, and can dynamically meet service transmission requirements.

With reference to the third aspect, in some implementation manners of the third aspect, the first session management function device is used to determine first QoS configuration information, and the first QoS configuration information is used to determine first resource configuration information, and the first The resource configuration information is used to configure access network resources of the first QoS flow, and the first QoS flow is used to transmit data of the terminal device.

With reference to the third aspect, in some implementation manners of the third aspect, the method further includes: the access and mobility management functional device sending the first request message to the first session management functional device.

In the fourth aspect, a data transmission method is provided, which can be executed by the first session management function device, or can also be executed by a chip or circuit configured in the first session management function device, and this application does not make any limited. The following takes the implementation by the first session management function device as an example for description.

The first session management function device receives a first request message, where the first request message includes first indication information, and the first indication information is used to indicate establishment of a first quality of service (quality of service) on the first communication path or the second communication path , QoS) flow (flow), the first QoS flow is used to transmit the data of the terminal device; the first session management function device generates first QoS configuration information according to the first request message, and the first QoS configuration information is used to determine the first resource Configuration information, the first resource configuration information is used to configure the access network resources of the first QoS flow, wherein the first communication path is a direct connection path, and the second communication path is a non-direct connection path; or, the first communication path is The non-direct connection path, the second communication path is a direct connection path.

According to the above solution, the first session management function device may receive the first request message, determine the first QoS configuration information according to the first indication information in the first request message, and the first QoS configuration information is used to determine the first resource configuration information, The first resource configuration information is used to configure access network resources of the first QoS flow, and the first QoS flow is used to transmit data of the terminal device. In this method, the first session management function device establishes the first QoS flow on the first communication path or the second communication path together with the first access network device and the terminal device, avoiding using a fixed communication path to transmit service data, It can dynamically meet the needs of business transmission.

With reference to the fourth aspect, in some implementation manners of the fourth aspect, the method further includes: the first session management function device sends the first QoS configuration information to the first access network device.

In a fifth aspect, a data transmission device is provided. The device may be a terminal device, or may also be a chip or a circuit configured in the terminal device, which is not limited in the present application.

The device includes: a transceiver unit, configured to send a first request message to a network device, where the first request message includes first indication information, and the first indication information is used to indicate to establish a first communication path on a first communication path or a second communication path. Quality of service (quality of service, QoS) flow (flow), the first QoS flow is used to transmit data of the device; the transceiver unit is also used to: receive first resource configuration information, the first resource configuration information is used to configure the first resource configuration information An access network resource of a QoS flow, wherein, the first communication path is a direct connection path, and the second communication path is a non-direct connection path; or, the first communication path is a non-direct connection path, and the second communication path is a direct connection path .

With reference to the fifth aspect, in some implementations of the fifth aspect, the first indication information is used to indicate the establishment of the first QoS flow on the first communication path, and the transceiver unit is further configured to: send a message to the network device through the first communication path Sending a second request message, where the second request message includes second indication information, the second indication information is used to indicate the establishment of a second QoS flow on the second communication path, and the second QoS flow is used to transmit data of the device; the transceiver unit It is also used for: receiving second resource configuration information, where the second resource configuration information is used to configure access network resources of the second QoS flow.

With reference to the fifth aspect, in some implementations of the fifth aspect, the first indication information is used to indicate the establishment of the first QoS flow on the first communication path, and the transceiver unit is further configured to: send a message to the network device through the first communication path sending a third request message, where the third request message includes third indication information and QoS flow identification information of the third QoS flow, where the third indication information is used to indicate that the third QoS flow is transferred to the second communication path, and the third The QoS flow is at least one of the first QoS flows; the transceiver unit is further configured to: receive third resource configuration information, where the third resource configuration information is used to configure access network resources of the third QoS flow.

With reference to the fifth aspect, in some implementations of the fifth aspect, the third resource configuration information is specifically used to: allocate access network resources of the third QoS flow on the second communication path; delete the third QoS flow on the first Access network resources for communication paths.

With reference to the fifth aspect, in some implementations of the fifth aspect, the third resource configuration information is specifically used to allocate access network resources of the third QoS flow on the second communication path, and the transceiver unit is further configured to: receive the third QoS flow Fourth, configuration information, where the fourth configuration information is used to delete the access network resources of the third QoS flow on the first communication path.

With reference to the fifth aspect, in some implementation manners of the fifth aspect, the first request message further includes fourth indication information, where the fourth indication information is used to indicate the session management function device that supports multipath.

With reference to the fifth aspect, in some implementations of the fifth aspect, the first communication path is a path through which the device directly connects to the first access network device, and the first indication information is used to indicate that the first communication path is established on the first communication path. For a QoS flow, the first resource configuration information includes configuration information of a Uu interface between the device and the first access network device.

With reference to the fifth aspect, in some implementations of the fifth aspect, the first communication path is a path through which the device directly connects to the first access network device, and the first indication information is used to indicate that the first communication path is established on the second communication path. QoS flow, the transceiver unit is also used to: send the cell identifier of the first relay terminal device, the cell identifier of the first relay terminal device is used to determine the access network device of the first relay terminal device, the second communication path The device includes a first relay terminal device.

With reference to the fifth aspect, in some implementations of the fifth aspect, the transceiver unit is specifically configured to: send a first measurement report to the first access network device, where the first measurement report includes the cell of at least one relay terminal device The identification and the PC5 signal strength of the proximity service communication of at least one relay terminal device, the at least one relay terminal device including the first relay terminal device, the PC5 signal strength of the at least one relay terminal device is used to determine the first relay terminal or, sending a radio resource control RRC message to the first access network device, where the RRC message includes the cell identifier of the first relay terminal device; or, the first request message includes the cell identifier of the first relay terminal device.

With reference to the fifth aspect, in some implementation manners of the fifth aspect, the access network device of the first relay terminal device is the first access network device, and the second communication path is that the device passes through the first relay terminal device The path connecting the first access network device, the first resource configuration information includes the configuration information of the PC5 interface between the device and the first relay terminal device, and the configuration information of the Uu interface between the device and the first access network device configuration information.

With reference to the fifth aspect, in some implementation manners of the fifth aspect, the access network device of the first relay terminal device is the second access network device, and the second communication path is that the device passes through the first relay terminal device The path connecting the second access network device, the first resource configuration information includes the configuration information of the PC5 interface between the device and the first relay terminal device, and the configuration information of the Uu interface between the device and the second access network device configuration information.

With reference to the fifth aspect, in some implementation manners of the fifth aspect, the first communication path is a path for the device to connect to the first access network device through the first relay terminal device, and the first indication information is used to indicate the The first communication path establishes the first QoS flow, and the first resource configuration information includes the configuration information of the PC5 interface between the device and the first relay terminal device, and the Uu interface between the device and the first access network device configuration information.

With reference to the fifth aspect, in some implementations of the fifth aspect, the first communication path is a path for the device to connect to the first access network device through the first relay terminal device, and the first indication information is used to indicate Two communication paths establish the first QoS flow, and the transceiver unit is also used to: send a second measurement report to the first access network device, the second measurement report includes the cell signal strength of the cell where the device can reside, and the cell signal Strength is used to determine the device's access network equipment.

With reference to the fifth aspect, in some implementation manners of the fifth aspect, the access network device of the device is the first access network device, and the second communication path is a path for the device to directly connect to the first access network device, the The first resource configuration information includes configuration information of a Uu interface between the apparatus and the first access network device.

With reference to the fifth aspect, in some implementations of the fifth aspect, the access network device of the device is a second access network device, and the second communication path is a path for the device to directly connect to the second access network device, the The first resource configuration information includes configuration information of a Uu interface between the apparatus and the second access network device.

In a sixth aspect, a device for data transmission is provided. The device may be a first access network device, or may also be a chip or a circuit configured in the first access network device, which is not limited in this application.

The device includes: a transceiver unit, configured to receive first indication information and first quality of service QoS configuration information, the first indication information is used to indicate the establishment of a first QoS flow on the first communication path or the second communication path, and the first The QoS configuration information is used to determine the access network resources of the first QoS flow, and the first QoS flow is used to transmit the data of the terminal device; the transceiver unit is also used to: send the first resource configuration information to the terminal device through the first communication path, The first resource configuration information is determined according to the first indication information and the first QoS configuration information, and the first resource configuration information is used to configure access network resources of the first QoS flow; wherein, the first communication path is a direct path, and the first The second communication path is a non-direct connection path; or, the first communication path is a non-direct connection path, and the second communication path is a direct connection path.

With reference to the sixth aspect, in some implementation manners of the sixth aspect, the first indication information is used to indicate establishment of the first QoS flow on the first communication path, and the transceiver unit is further configured to: receive the second indication information and the second QoS configuration information, the second indication information is used to indicate the establishment of a second QoS flow on the second communication path, the second QoS configuration information is used to determine the access network resources of the second QoS flow, and the second QoS flow is used to transmit the terminal data of the device; the transceiver unit is also used to: send second resource configuration information to the terminal device through the first communication path, the second resource configuration information is determined according to the second indication information and the second QoS configuration information, the second resource configuration information The information is used to configure access network resources of the second QoS flow.

With reference to the sixth aspect, in some implementations of the sixth aspect, the first indication information is used to indicate the establishment of the first QoS flow on the first communication path, and the transceiver unit is further configured to: receive the third indication information, the third QoS configuration information and QoS flow identification information of the third QoS flow, the third indication information is used to indicate that the third QoS flow is transferred to the second communication path, and the third QoS configuration information is used to determine the access of the first QoS flow network resources, the third QoS flow is at least one of the first QoS flows; the transceiver unit is also used to: send the third resource configuration information to the terminal device through the first communication path, and the third resource configuration information is based on the third indication information Determined with the third QoS configuration information, the third resource configuration information is used to configure the access network resources of the third QoS flow.

With reference to the sixth aspect, in some implementations of the sixth aspect, the third resource configuration information is specifically used to: allocate access network resources of the third QoS flow on the second communication path; delete the third QoS flow on the first Access network resources for communication paths.

With reference to the sixth aspect, in some implementation manners of the sixth aspect, the third resource configuration information is specifically used to allocate access network resources of the third QoS flow on the second communication path, and the transceiver unit is further configured to: send the third QoS flow 4. Configuration information, the fourth configuration information is used to delete the access network resources of the third QoS flow on the first communication path.

With reference to the sixth aspect, in some implementation manners of the sixth aspect, the first communication path is a path through which the terminal device directly connects to the device, and the first indication information is used to instruct the establishment of the first QoS flow on the first communication path, The first resource configuration information includes configuration information of a Uu interface between the terminal device and the apparatus.

With reference to the sixth aspect, in some implementations of the sixth aspect, the first communication path is a path through which the terminal device directly connects to the device, and the first indication information is used to instruct the establishment of the first QoS flow on the second communication path, The device also includes: a processing unit, configured to obtain a cell identifier of the first relay terminal device, the device of the second communication path includes the first relay terminal device; determine the first relay terminal according to the cell identifier of the first relay terminal device The access network equipment of the terminal equipment.

With reference to the sixth aspect, in some implementation manners of the sixth aspect, the processing unit is specifically configured to: determine the first relay terminal device and the first relay terminal according to the signal strength of the ProSe communication PC5 of at least one relay terminal device The cell identity of the device; or, receiving a radio resource control RRC message from the terminal device, where the RRC message includes the cell identity of the first relay terminal device; or, receiving a message from the first session management function device or the access and mobility management function device A first message, where the first message includes the cell identifier of the first relay terminal device.

With reference to the sixth aspect, in some implementation manners of the sixth aspect, the access network device of the first relay terminal device is the device, and the second communication path is the connection between the terminal device and the device through the first relay terminal device For the path, the first resource configuration information includes configuration information of the ProSe communication PC5 interface between the terminal device and the first relay terminal device, and configuration information of the Uu interface between the terminal device and the device.

With reference to the sixth aspect, in some implementation manners of the sixth aspect, the transceiving unit is further configured to: send fifth resource configuration information to the first relay terminal device, where the fifth resource configuration information includes configuration information of the PC5 interface between the relay terminal devices, and configuration information of the Uu interface between the first relay terminal device and the first access network device.

With reference to the sixth aspect, in some implementation manners of the sixth aspect, the access network device of the first relay terminal device is a second access network device, and the second communication path is that the terminal device passes through the first relay terminal device The path connecting the second access network device, the first resource configuration information includes the configuration information of the PC5 interface between the terminal device and the first relay terminal device, and the configuration information of the Uu interface between the terminal device and the second access network device configuration information.

With reference to the sixth aspect, in some implementation manners of the sixth aspect, the transceiver unit is further configured to: send a second message to the second access network device, where the second message includes the first QoS configuration information; The first resource configuration information of the network access device.

With reference to the sixth aspect, in some implementation manners of the sixth aspect, the second access network device is configured to send sixth resource configuration information to the first relay terminal device, where the sixth resource configuration information includes the terminal device and the first relay terminal device. Configuration information of a PC5 interface between relay terminal devices, and configuration information of a Uu interface between the first relay terminal device and the second access network device.

With reference to the sixth aspect, in some implementations of the sixth aspect, the first communication path is a path through which a terminal device connects to the device through a first relay terminal device, and the first indication information is used to indicate that the first communication path is established on the first communication path. For the first QoS flow, the first resource configuration information includes configuration information of the PC5 interface between the terminal device and the first relay terminal device, and configuration information of the Uu interface between the terminal device and the apparatus.

With reference to the sixth aspect, in some implementation manners of the sixth aspect, the first communication path is a path through which a terminal device connects to the device through a first relay terminal device, and the first indication information is used to indicate that in the second communication path To establish the first QoS flow, the apparatus further includes a processing unit configured to determine the access network device of the terminal device according to the cell signal strength of the cell where the terminal device can camp.

With reference to the sixth aspect, in some implementation manners of the sixth aspect, the access network device of the terminal device is the device, the second communication path is a path for the terminal device to directly connect to the device, and the first resource configuration information includes the terminal and Configuration information for the Uu interface between the devices.

With reference to the sixth aspect, in some implementation manners of the sixth aspect, the access network device of the terminal device is a second access network device, and the second communication path is a path for the terminal device to directly connect to the second access network device, The first resource configuration information includes configuration information of a Uu interface between the terminal device and the second access network device.

With reference to the sixth aspect, in some implementations of the sixth aspect, the transceiver unit is further configured to: send a third message to the second access network device, where the third message includes the first QoS configuration information; The first resource configuration information of the network access device.

In the seventh aspect, a device for data transmission is provided. The device may be an access and mobility management function device, or may also be a chip or a circuit configured in an access and mobility management function device. This is not limited.

The device includes: a transceiver unit, configured to receive a first request message, where the first request message includes fourth indication information, where the fourth indication information is used to indicate a session management function device that supports multi-path communication; a processing unit, configured to The first session management function device is determined according to the fourth indication information, and the first session management function device supports multipath communication.

With reference to the seventh aspect, in some implementation manners of the seventh aspect, the device is configured to determine first QoS configuration information, where the first QoS configuration information is used to determine first resource configuration information, where the first resource configuration information is used to Configure the access network resources of the first QoS flow, where the first QoS flow is used to transmit data of the terminal device.

With reference to the seventh aspect, in some implementation manners of the seventh aspect, the transceiving unit is further configured to: send the first request message to the first session management function device.

In an eighth aspect, a data transmission device is provided. The device may be a first session management function device, or may also be a chip or a circuit configured in the first session management function device, which is not limited in this application.

The device includes: a transceiver unit, configured to receive a first request message, where the first request message includes first indication information, and the first indication information is used to instruct the establishment of a first quality of service (QoS) on the first communication path or the second communication path ( quality of service (QoS) flow (flow), the first QoS flow is used to transmit the data of the terminal device; the processing unit is used to generate the first QoS configuration information according to the first request message, and the first QoS configuration information is used to determine the first QoS configuration information Resource configuration information, the first resource configuration information is used to configure the access network resources of the first QoS flow, wherein the first communication path is a direct connection path, and the second communication path is a non-direct connection path; or, the first communication path The path is a non-direct path, and the second communication path is a direct path.

With reference to the eighth aspect, in some implementation manners of the eighth aspect, the transceiving unit is further configured to: send the first QoS configuration information to the first access network device.

In a ninth aspect, the present application provides a processor configured to execute the methods provided in the foregoing aspects.

For the sending and obtaining/receiving operations involved in the processor, if there is no special description, or if it does not conflict with its actual function or internal logic in the relevant description, it can be understood as the processor's output and reception, input and other operations , can also be understood as the sending and receiving operations performed by the radio frequency circuit and the antenna, which is not limited in this application.

In a tenth aspect, the present application provides a communication device, which includes: a memory for storing programs; at least one processor for executing the computer programs or instructions stored in the memory to perform any of the above aspects or its implementation provided method.

In an implementation manner, the apparatus is a terminal device, a first access network device, an access and mobility management function device, or a first session management function device.

In another implementation manner, the apparatus is a chip, a chip system or a circuit used in the terminal device, the first access network device, the access and mobility management function device, or the first session management function device.

In an eleventh aspect, the present application provides a computer-readable storage medium, where the computer-readable medium stores program code for device execution, and the program code includes a method for executing any one of the above aspects or its implementation.

In a twelfth aspect, the present application provides a computer program product containing instructions. When the computer program product is run on a computer, it causes the computer to execute the method provided by any one of the above aspects or its implementation.

In a thirteenth aspect, the present application provides a chip. The chip includes a processor and a communication interface. The processor reads the instructions stored in the memory through the communication interface, and executes the method provided by any one of the above aspects or its implementation.

Optionally, as an implementation, the chip further includes a memory, in which computer programs or instructions are stored, and the processor is used to execute the computer programs or instructions stored in the memory, and when the computer programs or instructions are executed, the processor is used to execute The method provided by any one of the above aspects or its implementation.

In a fourteenth aspect, the present application provides a communication system, including the above-mentioned terminal device, first access network device, access and mobility management function device and/or first session management function device.

Description of drawings

Fig. 1 is a schematic diagram of a communication system applicable to the embodiment of the present application.

Fig. 2 is another schematic diagram of a communication system applicable to the embodiment of the present application.

FIG. 3 shows a protocol stack architecture in which a remote UE performs user plane data transmission through a non-direct path.

FIG. 4 shows a schematic flowchart of user plane data transmission performed by a remote UE in a non-direct path transmission manner.

FIG. 5 is a schematic diagram of a data transmission method 500 provided by an embodiment of the present application.

FIG. 6 is a schematic diagram of a data transmission method 600 provided by an embodiment of the present application.

FIG. 7 shows a schematic diagram of changes in the data transmission path of the remote UE after the method 600 of the present application is applied.

FIG. 8 is a schematic diagram of a data transmission method 800 provided by an embodiment of the present application.

FIG. 9 shows a schematic diagram of changes in the data transmission path of the remote UE after the method 800 of the present application is applied.

FIG. 10 is a schematic diagram of a data transmission method 1000 provided by an embodiment of the present application.

FIG. 11 shows a schematic diagram of changes in a data transmission path of a remote UE after the method 1000 of the present application is applied.

FIG. 12 is a schematic diagram of a data transmission method 1200 provided by an embodiment of the present application.

FIG. 13 shows a schematic diagram of changes in a data transmission path of a remote UE after the method 1200 of the present application is applied.

FIG. 14 is a schematic diagram of a data transmission method 1400 provided by an embodiment of the present application.

FIG. 15 shows a schematic diagram of changes in a data transmission path of a remote UE after the method 1400 of the present application is applied.

FIG. 16 is a schematic diagram of a data transmission method 1600 provided by an embodiment of the present application.

FIG. 17 shows a schematic diagram of changes in the data transmission path of the remote UE after the method 1600 of the present application is applied.

FIG. 18 is a schematic diagram of a data transmission method 1800 provided by an embodiment of the present application.

FIG. 19 shows a schematic diagram of changes in a data transmission path of a remote UE after the method 1800 of the present application is applied.

FIG. 20 is a schematic diagram of a data transmission method 2000 provided by an embodiment of the present application.

FIG. 21 shows a schematic diagram of changes in the data transmission path of the remote UE after the method 2000 of the present application is applied.

FIG. 22 shows a schematic diagram of an apparatus 2200 for data transmission provided by an embodiment of the present application.

FIG. 23 shows a schematic diagram of a data transmission apparatus 2300 provided by an embodiment of the present application.

Detailed ways

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

The technical solution provided by this application can be applied to various communication systems, such as: the fifth generation (5th generation, 5G) or new radio (new radio, NR) system, long term evolution (long term evolution, LTE) system, LTE frequency division Duplex (frequency division duplex, FDD) system, LTE time division duplex (time division duplex, TDD) system, etc. The technical solution provided by this application can also be applied to future communication systems, such as the sixth generation mobile communication system. The technical solution provided by this application can also be applied to device to device (device to device, D2D) communication, vehicle to everything (vehicle-to-everything, V2X) communication, machine to machine (machine to machine, M2M) communication, machine type Communication (machine type communication, MTC), and Internet of things (internet of things, IoT) communication system or other communication systems.

First, briefly introduce the network architecture applicable to this application, as follows.

As an example, Fig. 1 shows a schematic diagram of a network architecture.

As shown in FIG. 1 , the network architecture 100 takes a 5G system (the 5th generation system, 5GS) as an example. The network architecture may include but not limited to: network slice selection function (network slice selection function, NSSF), authentication server function (authentication server function, AUSF), unified data management (unified data management, UDM), network exposure function (network exposure function, NEF), network storage function (NF repository function, NRF), policy control function (policy control function, PCF), application function (application function, AF), access and mobility management function (access and mobility management function, AMF), session management function (session management function, SMF), user equipment (user equipment, UE), radio access network equipment, user plane function (user plane function, UPF), data network (data network, DN).

Among them, DN can be the Internet; NSSF, AUSF, UDM, NEF, NRF, PCF, AF, AMF, SMF, and UPF belong to the network elements in the core network. Since Figure 1 takes the 5G system as an example, the core network can be called 5G core network (5G core network, 5GC or 5GCN).

Each network element shown in FIG. 1 is briefly introduced below.

1. UE (including UE1 and UE2 in Figure 1): can be called terminal equipment, access terminal, subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless Communication Device, User Agent, or User Device.

A terminal device may be a device that provides voice/data to a user, for example, a handheld device with a wireless connection function, a vehicle-mounted device, and the like. At present, examples of some terminals are: mobile phone (mobile phone), tablet computer, notebook computer, palmtop computer, mobile internet device (mobile internet device, MID), wearable device, virtual reality (virtual reality, VR) device, augmented reality (augmented reality, AR) equipment, wireless terminals in industrial control, wireless terminals in self driving, wireless terminals in remote medical surgery, smart grid Wireless terminals in transportation safety, wireless terminals in smart city, wireless terminals in smart home, cellular phones, cordless phones, session initiation protocol , SIP) phones, wireless local loop (wireless local loop, WLL) stations, personal digital assistants (personal digital assistant, PDA), handheld devices with wireless communication capabilities, computing devices or other processing devices connected to wireless modems, Wearable devices, terminal devices in a 5G network, or terminal devices in a future evolved public land mobile network (PLMN), etc., are not limited in this embodiment of the present application.

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

In addition, in this embodiment of the application, the terminal device can also be the terminal device in the IoT system. IoT is an important part of the development of information technology in the future. Its main technical feature is to connect items to the network through communication technology, so as to realize Interconnection, an intelligent network that interconnects things.

It should be pointed out that a certain air interface technology (such as NR or LTE technology) may be used to communicate with each other between the terminal device and the access network device. A certain air interface technology (such as NR or LTE technology, etc.) may also be used to communicate with each other between terminal devices.

In the embodiment of the present application, the device for realizing the function of the terminal device may be the terminal device, or may be a device capable of supporting the terminal device to realize the function, such as a chip system or a chip, and the device may be installed in the terminal device. In the embodiment of the present application, the system-on-a-chip may be composed of chips, or may include chips and other discrete devices.

2. (wireless) access network ((radio) access network, (R) AN) equipment: it can provide authorized users in a specific area with the function of accessing the communication network, specifically including the third generation partnership project (3rd generation partnership) The wireless network device in the project, 3GPP) network may also include an access point in a non-3GPP (non-3GPP) network. For the convenience of description, AN equipment is used below.

AN devices may use different wireless access technologies. There are currently two types of wireless access technologies: 3GPP access technologies (for example, wireless access technologies used in third generation (3rd generation, 3G), fourth generation (4th generation, 4G) or 5G systems) and non- 3GPP (non-3GPP) access technology. 3GPP access technology refers to the access technology that complies with the 3GPP standard specifications. For example, the access network equipment in the 5G system is called the next generation base station node (next generation Node Base station, gNB) or the next generation wireless access network (next generation radio access network, NG-RAN) equipment. Non-3GPP access technologies may include air interface technology represented by access point (AP) in wireless fidelity (WiFi), worldwide interoperability for microwave access (WiMAX), code Multiple access (code division multiple access, CDMA), etc. The AN device may allow non-3GPP technology interconnection and intercommunication between the terminal device and the 3GPP core network.

The AN device can be responsible for functions such as wireless resource management, quality of service (QoS) management, data compression and encryption on the air interface side. The AN equipment provides access services for the terminal equipment, and then completes the forwarding of control signals and user data between the terminal equipment and the core network.

AN equipment may include, but not limited to, for example: a macro base station, a micro base station (also called a small station), a radio network controller (radio network controller, RNC), a node B (Node B, NB), a base station controller (base station controller) , BSC), base transceiver station (base transceiver station, BTS), home base station (for example, home evolved NodeB, or home Node B, HNB), baseband unit (baseband unit, BBU), AP in WiFi system, wireless relay Node, wireless backhaul node, transmission point (transmission point, TP) or sending and receiving point (transmission and reception point, TRP), etc., can also be gNB or transmission point (TRP or TP) in the 5G (eg, NR) system , one or a group (including multiple antenna panels) antenna panels of a base station in a 5G system, or it can also be a network node that constitutes a gNB or a transmission point, such as a distributed unit (DU), or a next-generation communication Base stations in 6G systems, etc. The embodiment of the present application does not limit the specific technology and specific device form adopted by the AN device.

3. AMF: mainly used for functions such as access control, mobility management, attachment and detachment.

4. SMF: mainly used for user plane network element selection, user plane network element redirection, Internet protocol (internet protocol, IP) address allocation for terminal equipment, session establishment, modification and release, and QoS control.

5. UPF: mainly used for receiving and forwarding user plane data. For example, the UPF can receive user plane data from the DN, and send the user plane data to the terminal device through the AN device. UPF can also receive user plane data from terminal equipment through AN equipment and forward it to DN.

6. NEF: It is mainly used to safely open services and capabilities provided by 3GPP network functions to the outside.

7. PCF: A unified policy framework mainly used to guide network behavior, and provide policy rule information for control plane network elements (such as AMF, SMF, etc.).

8. AF: It is mainly used to provide services to the 3GPP network, such as interacting with the PCF for policy control.

9. Network slice selection function (network slice selection function, NSSF): mainly used for network slice selection.

10. UDM: mainly used for UE subscription data management, including storage and management of UE ID, UE access authorization, etc.

11. DN: mainly used for the operator network that provides data services for the UE. For example, the Internet (Internet), a third-party service network, an IP multimedia service (IP multi-media service, IMS) network, and the like.

12. AUSF: mainly used for user authentication, etc.

13. NRF: It is mainly used to save the description information of network functional entities and the services they provide.

In the network architecture shown in FIG. 1 , various network elements can communicate through interfaces. For example, UE2 is connected to the AN device through a radio resource control (radio resource control, RRC) protocol, and a Uu interface is used for communication between the UE and the AN device. The PC5 interface is used for communication between UE1 and UE2, and the PC5 interface can be used for mutual discovery between UEs and data and signaling transmission between UEs. In addition, in Figure 1, N1 is the interface between UE2 and AMF, N2 is the interface between (R)AN and AMF, used for sending non-access stratum (non-access stratum, NAS) messages, etc.; N3 is RAN The interface between UPF and UPF is used to transmit user plane data, etc.; N4 is the interface between SMF and UPF, used to transmit information such as tunnel identification information connected by N3, data cache indication information, and downlink data notification messages; The N6 interface is the interface between the UPF and the DN, and is used to transmit user plane data, etc., and the N11 interface is the interface between the AMF and the SMF.

It should be understood that the network architecture shown above is only an example, and the network architecture applicable to the embodiment of the present application is not limited thereto, and any network architecture capable of realizing the functions of the foregoing network elements is applicable to the embodiment of the present application.

It should also be understood that the functions or network elements such as AMF, SMF, UPF, PCF, UDM, NSSF, and AUSF shown in Figure 1 can be understood as network elements for implementing different functions, for example, they can be combined into network slices as required. These network elements can be independent devices, or can be integrated in the same device to achieve different functions, or can be network elements in hardware devices, or software functions running on dedicated hardware, or platforms (for example, cloud The virtualization function instantiated on the platform), this application does not limit the specific form of the above network elements.

It should also be understood that the above names are only defined for the convenience of distinguishing different functions, and shall not constitute any limitation to the present application. This application does not exclude the possibility of adopting other names in the 6G network and other networks in the future. For example, in a 6G network, some or all of the above network elements may use the terms in 5G, or may use other names.

To facilitate understanding of the embodiments of the present application, terms involved in the present application are briefly described.

1. Direct path: The terminal device is directly connected to the access network device, that is, in the direct connection path, the terminal device and the access network device directly establish a connection and communicate without passing through other devices (such as , relay device).

It should be understood that, in the direct connection path, after the terminal device is directly connected to the access network device, data transmission is performed with the data network via the access network device and the core network device.

The direct path may also be called a direct link (link).

2. Indirect path: The terminal device accesses the access network device through the relay device, that is, in the indirect path, the terminal device and the access network device pass through one or more relay devices Establish a connection and communicate. For example, the relay device is a relay (relay) UE, and the terminal device is a remote (remote) UE. In this case, the remote UE establishes a connection with the relay UE, and the relay UE establishes a connection with the RAN, so that the remote The UE can establish a connection with the RAN through the relay UE.

It should be understood that, in the non-direct path, after the terminal device accesses the access network device through the relay device, data transmission is performed with the data network through the relay device, the access network device, and the core network device.

It should be noted that, in the non-direct path, the connection mode between the terminal device and the relay device may be the connection mode in 3GPP, for example, proximity-based services communication 5 (proximity-based services communication 5, PC5) connection, also It may be a connection mode in a short-distance communication technology, for example, a Bluetooth connection, a WiFi connection, and the like. In addition, when multiple relay devices are included on the indirect path, the connection method between the terminal device and the relay device may be the same as or different from the connection method between any two relay devices.

An indirect path may also be called an indirect link (link).

3. Protocol data unit (protocol data unit, PDU) session (PDU session): 5G core network (5G core network, 5GC) supports PDU connection business. The PDU connection service may refer to a service of exchanging PDU data packets between the terminal device and the DN. The PDU connection service is realized by the establishment of the PDU session initiated by the terminal device. After a PDU session is established, a data transmission channel between the terminal device and the DN is established. In other words, PDU sessions are at UE level. Each end device can establish one or more PDU sessions.

As mentioned earlier, SMF is mainly responsible for session management in mobile networks. The PDU session can be established, modified or released between the terminal device and the SMF through NAS session management (session management, SM) signaling.

In this embodiment of the application, a PDU session can be identified by a PDU session identifier (PDU session identifier, PDU session ID).

4. Quality of service (QoS) flow (flow): The QoS distinction granularity in the PDU session. A QoS flow identifier (QoS flow identifier, QFI) can be used to identify a QoS flow. A PDU session can include multiple QoS flows, and the QFI of each QoS flow is different. In other words, one QFI can be unique within one PDU session.

Further, the QoS flow corresponding to the service may refer to the QoS flow used to transmit the data of the service. For example, when the data of the service is transmitted through the QoS flow in the PDU session, the QoS flow may be called the QoS flow corresponding to the service. The service carried by the QoS flow: may refer to the service transmitted through the QoS flow.

Furthermore, the QoS requirements of the QoS flow: may refer to the conditions that the QoS parameters corresponding to the QoS flow need to meet. QoS parameters may include but not limited to: rate, delay, packet loss rate, priority, reliability, and so on. For example, the QoS requirement corresponding to the QoS flow is: the rate in the QoS parameter corresponding to the QoS flow needs to meet 7 megabits per second (Mbps), that is, greater than or equal to 7 Mbps.

Fig. 2 shows a schematic diagram of another network architecture. As shown in FIG. 2, the network architecture 200 is based on the architecture 100 shown in FIG. ) UE) access to the network solution. In Figure 2, the remote UE can communicate with the DN through two paths, one is the direct path (direct path), specifically, the remote UE directly accesses the AN, and accesses the core network of the remote UE through the AN (including the AMF of the remote UE, the SMF of the remote UE, and the UPF of the remote UE), and perform signaling and data transmission through the AN and the core network and DN of the remote UE. The other is an indirect path. Specifically, the remote UE first accesses the AN through the relay UE, then accesses the core network of the remote UE through the AN, and then passes through the core network of the AN and the remote UE. Signaling and data transmission with DN. For the relay UE, the direct path can also be used to communicate with the DN. Specifically, the relay UE can directly access the AN, access the core network of the relay UE through the AN (including the AMF of the relay UE, the SMF of the relay UE, and the UPF of the relay UE), and then communicate with the relay UE through the AN. The core network and DN perform signaling and data transmission.

It should be understood that the relay UE in FIG. 2 is a layer-2 proximity-based services (proximity-based services, ProSe) user equipment-to-network relay (layer-2ProSe UE-to-network relay).

FIG. 3 shows a protocol stack architecture in which a remote UE performs user plane data transmission through a non-direct path. As shown in FIG. 3 , a protocol data unit (protocol data unit, PDU) layer (layer) is used to transfer data generated by an application software (applicable soft, APP) between the remote UE and the UPF. The service data adaptation protocol (service data adaptation protocol, SDAP) layer is used for mapping between the quality of service (quality of service, QoS) flow (flow) and the data radio bearer (data radio bearer, DRB). It should be understood that the QoS flow is a data transmission channel with QoS guarantee between the UE and the UPF. The QoS flow consists of two parts: DRB between UE and NG-RAN, N3 connection between NG-RAN and UPF. One or more QoS flows can share a DRB connection, and SDAP is used to map QoS flows to DRBs. DRB is composed of two layers: packet data convergence protocol (PDCP) layer and radio link control (radio link control, RLC) layer. Among them, the PDCP layer is used to perform functions such as header compression, decompression, encryption/decryption, integrity protection, and integrity verification of user plane data, and the PDCP layer is configured by an RRC message.

Media access control (mediu access control, MAC) is used to perform mapping between logical channels and transport channels, and to combine MAC data from different logical channels into one transport block. PHY is the physical layer (physical layer, PHY). The adaptation (adaptation) layer is used for the relay UE or the NG-RAN to indicate which remote UE the data packet contained in the RLC of the relay UE belongs to, and which radio bearer of the remote UE belongs to.

General packet radio service (general packet radio service, GPRS) tunnel transmission protocol-user plane (tunnel protocol-user, GTP-U) is a set of high-level protocols based on IP, located in transmission control protocol/internet protocol (transmission control protocol/internet protocol, TCP/IP), User Datagram Protocol/Internet Protocol (user data protocol, UDP/IP). GTP-U messages are used to carry user data between GTP-U entities. L2 means layer 2 (layer 2), and L2 means layer 1 (layer 1).

As shown in Figure 3, from the perspective of NG-RAN, the DRB of the remote UE consists of two parts: the PDCP layer between the NG-RAN and the remote UE, and the RLC layer between the NG-RAN and the relay UE . From the perspective of the remote UE, the DRB of the remote UE consists of two parts: the PDCP layer between the NG-RAN and the remote UE, and the RLC layer between the NG-RAN and the relay UE.

Specifically, the transmission process of uplink data is: the APP layer of the remote UE generates data, the remote UE maps the data to the QoS flow at the PDU layer, and sends the data to the Uu-SDAP layer, the data includes the QoS flow identifier, and the remote UE At the Uu SDAP layer, the UE maps the QoS flow to the DRB according to the QoS flow identifier, and sends the data of the QoS flow to the Uu PDCP layer corresponding to the DRB. The remote UE sends the data of the Uu PDCP layer to the protocol stack of the PC5 interface for processing, and sends it to the relay UE through the PC5 interface. The relay UE analyzes and obtains the Uu PDCP data of the remote UE, and adds an adaptation layer to the data, and the adaptation layer includes the identity of the remote UE. The relay UE sends data to the NG-RAN through the Uu interface with the NG-RAN. After receiving the data, NG-RAN determines that the data belongs to the remote UE according to the identity of the remote UE in the adaptation layer, and uses the context of the remote UE to parse out the data of the remote UE. NG-RAN communicates with the UPF The N3 interface of the remote UE sends the data of the remote UE to the UPF.

Similarly, the process of downlink data transmission is: NG-RAN receives the data sent by UPF to the remote UE, and determines that the remote UE uses the relay UE for data transmission according to the context of the remote UE. Further, the NG-RAN adds the identity of the remote UE in the adaptation layer and sends it to the relay UE. After the relay UE parses the data, it determines that the data belongs to the remote UE according to the identity of the remote UE in the adaptation layer, and sends the data to the remote UE through the PC5 interface between the relay UE and the remote UE, and the remote UE performs data analysis.

Fig. 4 shows a schematic flowchart of user plane data transmission performed by a remote UE in an indirect path transmission manner. As shown in Fig. 4, the method 400 includes the following steps.

S410, the relay UE and the remote UE independently register with the 5G network.

S420, the relay UE and the remote UE independently obtain authorization and authentication for performing the relay service, and obtain relevant authorization and authentication information.

S430, the remote UE executes a relay UE discovery procedure, and selects a final UE.

S440, if the relay UE selected by the remote UE is in an idle (idle) state, the relay UE enters the connected state through a service request (SR) process after receiving a request from the remote UE

S450, the remote UE establishes a PC5 connection with the relay UE.

S460, the remote UE establishes an RRC connection with the NG-RAN through the relay UE, and the NG-RAN is the same as the base station of the relay UE. That is, the remote UE establishes an access stratum (access stratum, AS) connection.

S470, the remote UE sends a NAS message to the AMF, the NAS message is encapsulated in an RRC message, and the RRC message is sent to the NG-RAN through the PC5 interface between the relay UE and the remote UE. That is, the remote UE establishes a NAS connection.

S480, the remote UE initiates a PDU session establishment procedure.

After that, the data of the remote UE is forwarded through the UPF, NG-RAN and the relay UE.

In the current data transmission, the remote UE uses a certain fixed path (direct path or non-direct path) to transmit service data. For example, if the terminal device determines that the transmission path is a direct path, the terminal device sends The network access device initiates a PDU session request, establishes the PDU session and QoS flow of the direct path, and then, the terminal device transmits data with the data network through the QoS flow of the direct path. Or, if the terminal device determines that the transmission path is a non-direct path, the terminal device initiates a PDU session request to the access network device through the relay device, and establishes a PDU session and QoS flow for the non-direct path. The QoS flow of the connection path and the data network transmit data. This transmission mode cannot dynamically meet service transmission requirements, for example, time delay, communication quality, or communication capacity.

This application provides a method and device for data transmission, so that the data transmission paths between the terminal equipment and the data network are diversified and can dynamically meet business needs.

FIG. 5 is a schematic diagram of a data transmission method 500 provided by an embodiment of the present application. Method 500 may include the following steps.

S510. The terminal device sends a first request message to the network device through the first communication path.

Correspondingly, the network device receives the first request message.

Specifically, the network device may be a first session management function device.

Wherein, the first request message includes first indication information, and the first indication information is used for instructing to establish the first QoS flow on the first communication path or the second communication path.

As an example, the first indication information may be a "direct (direct connection) indication" or an "indirect (indirect connection) indication". Wherein, "direct (directly connected) indication" indicates that a QoS flow is established on a direct path, and "indirect (indirect) indication" indicates that a QoS flow is established on an indirect path.

For example, assuming that the first communication path is a direct path and the second communication path is a non-direct path, if the first indication information is used to indicate the establishment of the first QoS flow on the first communication path, then the first indication information is direct (direct connected) indication; if the first indication information is used to indicate the establishment of the first QoS flow on the second communication path, the first indication information is an indirect (non-direct connection) indication.

As another example, assuming that the first communication path is a non-direct path and the second communication path is a direct path, if the first indication information is used to indicate the establishment of the first QoS flow on the first communication path, then the first indication information is indirect( non-direct connection) indication; if the first indication information is used to instruct the establishment of the first QoS flow on the second communication path, then the first indication information is a direct (direct connection) indication.

Specifically, the terminal device may determine the path established by the first QoS flow as the first communication path or the second communication path according to service transmission requirements and usage of each communication path, so as to better meet service transmission requirements.

Wherein, the first request message may be a non-access stratum (non-access stratum, NAS) message such as a PDU session establishment request message or a PDU session modification request message. Wherein, the first request message may include identification information of the first PDU session, and the identification information of the first PDU session may be used to identify the first PDU session, for example, a PDU session ID.

In one example, the first communication path is a direct path, and the second communication path is a non-direct path.

For example, the first communication path is a path through which the terminal device is directly connected to the first access network device. In this case, the terminal device sends a message #A to the network device through the first communication path (the message #A can be the first request message, or the second request message or the third request message hereinafter), including: The terminal device sends message #A to the first access network device through the Uu interface, and the first access network device sends message #A to the first session management function device. It should be understood that, in this case, the first access network device is a device that provides access services for terminal devices.

In yet another example, the first communication path is a non-direct path, and the second communication path is a direct path.

For example, the first communication path is a path for the terminal device to connect to the first access network device through the first relay terminal device. In this case, the terminal device sends a message #A to the network device through the first communication path (the message #A can be the first request message, or the second request message or the third request message hereinafter), including: The terminal device sends a message #A to the first relay terminal device through the PC5 interface, the first relay terminal device sends a message #A to the first access network device, and the first access network device sends a message to the first session management function device #A. It should be understood that, in this case, the first access network device is a device that provides access services for the first relay terminal device.

Wherein, the first QoS flow is used to transmit data of the terminal equipment.

For example, the first QoS flow may be used to transmit data of service #A of the terminal device.

S520. The first session management function device determines first QoS configuration information according to the first request message.

Wherein, the first QoS configuration information is used to determine access network resources of the first QoS flow. The access network resource (access network recourse) of the first QoS flow can also be understood as a radio resource (radio resource) corresponding to the first QoS flow or a radio configuration corresponding to the first QoS flow. For example, radio resource information or configuration information of PDCP, RLC, MAC, PHY, etc. corresponding to the first QoS flow.

Specifically, the first session management function device may determine the first QoS configuration information according to the first request message, where the first QoS configuration information includes QoS parameters of the first QoS flow, for example, the QoS parameters may include: 5G QoS identifier (5G QoS identifier, 5QI) (represents a set of QoS parameters, including bandwidth, delay jitter, etc.), allocation retention priority (allocation retention priority, ARP), guaranteed bit rate (guaranteed bit rate, GBR), maximum bit rate (maximum bit rate, MBR), QoS notification control (qos notification control, QNC), etc.

As an example, the first QoS configuration information may be a QoS profile (QoS profile) of the first QoS flow.

In addition, the first session management function device stores the corresponding relationship between the first QoS flow and the path indicated by the first indication information. In other words, the first session management function device stores the path of the first QoS flow.

For example, the first indication information is a direct indication, and the first session management function device stores a correspondence between the first QoS flow and the direct path, and the correspondence indicates that the first QoS flow is a QoS flow established on the direct path.

For another example, the first indication information is an indirect indication, and the first session management function device stores the correspondence between the first QoS flow and the indirect path, and the correspondence indicates that the first QoS flow is a QoS flow established on the indirect path.

S530. The first session management function device sends the first indication information and the first QoS configuration information to the first access network device.

Correspondingly, the first access network device receives the first indication information and the first QoS configuration information.

The first session management function device may send the first indication information and the determined first QoS configuration information to the terminal device, so that the terminal device configures access network resources of the first QoS flow.

S540. The first access network device sends the first resource configuration information to the terminal device through the first communication path.

Correspondingly, the terminal device receives the first resource configuration information through the first communication path.

The first resource configuration information is used to configure access network resources of the first QoS flow.

Specifically, the access network resource of the first QoS flow includes a data radio bearer (data radio bearer, DRB) of the first QoS flow.

Specifically, the DRB of the first QoS flow may include a Uu interface DRB, or, the DRB of the first QoS flow includes a Uu interface DRB and a PC5 interface DRB.

Wherein, the first resource configuration information is determined according to the first indication information and the first QoS configuration information.

As an example, the first resource configuration information is determined by the first access network device.

For example, the first access network device determines to establish the first QoS flow on the first communication path according to the first indication information. In this case, the access network resources of the first QoS flow are the access network resources of the first communication path The first access network device may determine the first resource configuration information according to the first QoS configuration information, and send the first resource configuration information to the terminal device through the first communication path.

As yet another example, the first resource configuration information is determined by the second access network device.

For example, the first access network device determines to establish the first QoS flow on the second communication path according to the first indication information. In this case, the access network resources of the first QoS flow are the access network resources of the second communication path , assuming that the second communication path includes the second access network device, the first access network device may send the first QoS configuration information to the second access network device, and the second access network device determines The first resource configuration information is then sent to the first access network device.

According to the method provided in the above-mentioned embodiment, the terminal device can send the first indication information to the network device through the first communication path, instructing to establish the first QoS flow on the first communication path or the second communication path, and the first access network device through the first communication path A communication path sends first resource configuration information to the terminal device to configure access network resources of the first QoS flow, where the first resource configuration information is determined according to the first indication information and the first QoS configuration information. In this method, through the instruction of the terminal device and the configuration of the first access network device, the first QoS flow can be established on the first communication path or the second communication path, avoiding the use of a fixed communication path to transmit service data, It can dynamically meet the needs of business transmission.

It should be understood that the first QoS flow may be one or more QoS flows of the first PDU session, without limitation. For example, suppose that in the above embodiment, the terminal device, the first access network device, and the core network device have established two QoS flows on the first communication path or the second communication path: QoS flow 1 and QoS flow 2, where The first QoS flow refers to QoS flow 1 and QoS flow 2 .

Optionally, the terminal device is a remote (remote) terminal device.

Optionally, step S510 includes: the terminal device sends the first request message to the access and mobility management function device, and the access and mobility management function device sends the first request message to the first session management function device.

Specifically, the terminal device may send the first request message to the access and mobility management function device through an uplink (uplink, UP) NAS message. Further, the access and mobility management function device may send the first request message to the first session management function device through an N11 message, and the N11 message may be a PDU session creation context (Nsmf_PDUsession_createSMcontext request) request or the like.

It should be understood that both the NAS message and the N11 message may include identification information of the first PDU session, and the identification information of the first PDU session may be a first PDU session ID.

Optionally, step S530 includes: the first session management function device sends the first indication information and the first QoS configuration information to the access and mobility management function device, and the access and mobility management function device sends the first access network The device sends first indication information and first QoS configuration information.

Specifically, the first session management function device may send the first indication information and the first QoS configuration information to the access and mobility management function device through an N11 message. As an example, the N11 message may be a N1N2 message delivery (Namf_communication_N1N2MessageTransfer) message, the N11 message includes an N1 SM container (N1SM container) and an N2 SM container (N2 SM container), and the N2 SM container includes the first indication information and the first QoS configuration information. Further, the access and mobility management functional device sends the first indication information and the first QoS configuration information to the first access network device through an N2 message, where the N2 message may be a PDU session resource setup request (PDU session resource setup request) message or PDU session resource modify request (PDU session resource modify request) message, etc.

It should be understood that both the N11 message and the N2 message may include identification information of the first PDU session, and the identification information of the first PDU session may be a first PDU session ID.

In addition, the N11 message may also include an N1 SM container (N1 SM container), and the N1 SM container includes a PDU session establishment acceptance (accept) message or a PDU session modification acceptance message. The access and mobility management function device can send the N1 SM container to the terminal device.

Optionally, in an implementation scenario of the foregoing embodiment, the first indication information is used to instruct the first QoS to be established on the first communication path, and the method 500 may further include: the terminal device sends to the network device through the first communication path Second request message.

Correspondingly, the network device receives the second request message.

Wherein, the second request message includes second indication information, and the second indication information is used to instruct establishment of the second QoS flow on the second communication path.

It should be understood that the second QoS flow may be one or more QoS flows of the first PDU session, without limitation. For example, suppose two QoS flows have been established on the first communication path: QoS flow 1 and QoS flow 2, and the terminal device requests to establish QoS flow 3 and QoS flow 4 on the second communication path, where the second QoS flow refers to That is, QoS flow 3 and QoS flow 4.

As an example, the second indication information may be a "direct (direct connection) indication" or an "indirect (indirect connection) indication". Wherein, "direct (directly connected) indication" indicates that a QoS flow is established on a direct path, and "indirect (non-direct) indication indicates that a QoS flow is established on an indirect path.

For example, if the second communication path is an indirect path, the second indication information is an indirect (indirect) indication.

For another example, if the second communication path is a direct connection path, the second indication information is a direct (direct connection) indication.

Specifically, the second request message may be a PDU session modification request message. Wherein, the second request message may include identification information of the first PDU session, for example, a PDU session ID.

Wherein, the second QoS flow is used to transmit data of the terminal equipment.

As an implementation manner, the second QoS flow may be used to transmit data of service #A of the terminal device.

That is, the data of the service #A of the terminal device can be transmitted not only through the first QoS flow of the first communication path, but also through the second QoS flow of the second communication path.

In this implementation manner, the data of the same service is transmitted through two different communication paths, which can improve the reliability of data transmission of the terminal device.

As yet another implementation manner, the second QoS flow may be used to transmit data of service #B of the terminal device.

That is, the data of service #A of the terminal device can be transmitted through the first QoS flow of the first communication path, and the data of service #B of the terminal device can be transmitted through the second QoS flow of the second communication path.

In this implementation manner, the data transmission rate of the terminal device can be increased by transmitting the data of the two services through two different communication paths.

Optionally, both the second QoS flow and the first QoS flow belong to the first PDU session.

In the above implementation scenario, the method 500 further includes: the first session management function device determines the second QoS configuration information according to the second request message.

Wherein, the second QoS configuration information is used to determine access network resources of the second QoS flow. The access network resource of the second QoS flow may also be understood as a radio resource (radio resource) corresponding to the second QoS flow or a radio configuration corresponding to the second QoS flow. For example, radio resource information or configuration information of PDCP, RLC, MAC, PHY, etc. corresponding to the second QoS flow.

Specifically, the first session management function device may determine the second QoS configuration information according to the second request message, the second QoS configuration information includes QoS parameters of the second QoS flow, for example, the QoS parameters may include: 5QI, ARP, GBR, MBR, QNC, etc.

As an example, the second QoS configuration information may be a QoS profile (QoS profile) of the second QoS flow.

In addition, the first session management function device may store the correspondence between the second QoS flow and the path indicated by the second indication information. In other words, the first session management function device stores the path of the second QoS flow.

For example, the second indication information is a direct indication, and the first session management function device stores the correspondence between the second QoS flow and the direct path, indicating that the second QoS flow is a QoS flow established on the direct path.

In another example, the second indication information is an indirect indication, and the first session management function device stores the correspondence between the second QoS flow and the indirect path, indicating that the second QoS flow is a QoS flow established on the indirect path.

In the above implementation scenario, the method 500 further includes: the first session management function device sends the second indication information and the second QoS configuration information to the first access network device.

Correspondingly, the first access network device receives the second indication information and the second QoS configuration information.

In the above implementation scenario, the method 500 further includes: the first access network device sending the second resource configuration information to the terminal device through the first communication path.

Correspondingly, the terminal device receives the second resource configuration information through the first communication path.

The second resource configuration information is used to configure access network resources of the second QoS flow.

Specifically, the access network resources of the second QoS flow include the DRB of the second QoS flow.

Specifically, the DRB of the second QoS flow may include the DRB of the Uu interface, or, the DRB of the second QoS flow includes the DRB of the Uu interface and the DRB of the PC5 interface.

Wherein, the second resource configuration information is determined according to the second indication information and the second QoS configuration information.

As an example, the second resource configuration information is determined by the first access network device.

For example, the second communication path is a path through which the terminal device is directly connected to the first access network device. In this case, the first access network device may determine the path of the second QoS flow according to the second indication information, and The QoS configuration information determines the second resource configuration information, and sends the second resource configuration information to the terminal device through the first communication path.

As yet another example, the second resource configuration information is determined by the second access network device.

For example, the second communication path is a path through which the terminal device directly connects to the second access network device. In this case, the first access network device may determine the path of the second QoS flow according to the second indication information, and send the second The QoS configuration information is sent to the second access network device, and the second access network device determines the second resource configuration information according to the second QoS configuration information, and then sends it to the first access network device.

According to the method provided in the above implementation scenario, the terminal device and the first access network device can also establish a second QoS flow on the second communication path, and the second QoS flow is used to transmit the data of the terminal device, so that the connection between the terminal device and the data network The communication paths are diverse, which can increase the rate of data transmission or provide reliability of data transmission.

Optionally, in another implementation scenario of the foregoing embodiment, the first indication information is used to indicate that the first QoS is established on the first communication path, and the method 500 may further include: the terminal device sending the network device Send the third request message.

Correspondingly, the network device receives the third request message.

Wherein, the third request message includes third indication information and QoS flow identification information of the third QoS flow, and the third indication information is used to indicate to transfer the third QoS flow to the second communication path.

As an example, the third indication information may be any of the following: "direct (direct connection) indication", "indirect (non-direct connection) indication", "transfer (transfer) indication", "transfer to direct (transfer) To direct) instruction", "transfer to indirect (transfer to non-direct connection) instruction", "transfer (transfer) instruction + direct (direct connection) instruction", "transfer (transfer) instruction + indirect (non-direct connection) instruction" .

Among them, "direct (direct connection) instruction", "transfer to direct (transfer to direct) instruction" and "transfer (transfer)+direct (direct connection) instruction" indicate that the third QoS flow is transferred to the direct connection path; "indirect (indirect) indication", "transfer to indirect (transfer to indirect) indication" and "transfer (transfer)+indirect (indirect) indication" indicate that the third QoS flow is transferred to the indirect path. The "transfer (transfer) indication" means to transfer the communication path of the third QoS flow, and the first session management function device and the first access network device can determine the transferred path according to the current path of the third QoS flow.

For example, if the second communication path is an indirect path, the third indication information is "indirect indication", "transfer to indirect (transfer to indirect) indication", "transfer (transfer)+indirect (indirect) indication" ".

As another example, if the second communication path is a direct path, the third indication information is "direct indication", "transfer to direct (transfer to direct) indication", "transfer (transfer)+direct (direct connection) indication".

As another example, assuming that the third indication information is "transfer indication", if the current path of the third QoS flow is an indirect path, the first session management function device and the first access network device will follow the "transfer (transfer) indication" Determine to transfer the third QoS flow to the direct path; if the current path of the third QoS flow is a direct path, the first session management function device and the first access network device determine to transfer the third QoS flow according to the "transfer (transfer) instruction" The three QoS flows are transferred to indirect paths.

Specifically, the third request message may be a PDU session modification request message. Wherein, the third request message may include identification information of the first PDU session, for example, a PDU session ID.

Wherein, the third QoS flow is at least one of the first QoS flows.

It should be understood that the third QoS flow may be one or more QoS flows of the first PDU session, without limitation. For example, suppose two QoS flows have been established on the first communication path: QoS flow 1 and QoS flow 2, and the terminal device requests to transfer QoS flow 1 from the first communication path to the second communication path, where the first QoS flow Refers to QoS flow 1 and QoS flow 2, and the third QoS flow refers to QoS flow 1.

Wherein, the QoS flow identification information of the third QoS flow may be the QFI of the third QoS flow.

Wherein, the third QoS flow is used to transmit data of the terminal equipment.

As an implementation manner, the third QoS flow may be used to transmit data of service #A of the terminal device.

That is, the third QoS flow can be transferred from the first communication path to the second communication path, and the data of the service #A of the terminal device can be continuously transmitted using the third QoS flow.

On the other hand, if the first communication path cannot meet the transmission requirements of service #A, the terminal device transfers at least one third QoS flow in the first communication path to the second communication path, and passes the third QoS flow in the second communication path. The streaming service #A can guarantee the transmission requirements of the service #A.

As yet another implementation manner, the third QoS flow may be used to transmit data of service #B of the terminal device.

That is, it is possible to transfer the third QoS flow from the first communication path to the second communication path, and transmit the data of the service #B of the terminal device through the third QoS flow.

In this implementation, if the first communication path cannot meet the transmission requirements of service #B, then the terminal device transfers at least one third QoS flow in the first communication path to the second communication path, through the second communication path The third QoS streaming service #B. Through this method, while ensuring the transmission requirements of service #B, it can also avoid occupying transmission resources due to new QoS flows, which helps to improve the data transmission efficiency of the system.

In the above implementation scenario, the method 500 further includes: the first session management function device determines third QoS configuration information according to the third request message.

Wherein, the third QoS configuration information is used to determine access network resources of the third QoS flow. The access network resource of the third QoS flow may also be understood as a radio resource (radio resource) corresponding to the third QoS flow or a radio configuration corresponding to the third QoS flow. For example, radio resource information or configuration information of PDCP, RLC, MAC, PHY, etc. corresponding to the third QoS flow.

Specifically, the first session management function device may determine third QoS configuration information according to the third request message, where the third QoS configuration information includes QoS parameters of the third QoS flow, for example, the QoS parameters may include: 5QI, ARP, GBR, MBR, QNC, etc.

As an example, the third QoS configuration information may be a QoS profile (QoS profile) of the third QoS flow.

In addition, the first session management function device may update the corresponding relationship between the third QoS flow and the path of the third QoS flow according to the third indication information.

For example, the third indication information is a direct indication, and the first session management function device stores the corresponding relationship between the third QoS flow and the direct path, indicating that the third QoS flow after the transfer is a QoS flow established on the direct path.

In another example, the current path of the third QoS flow is a direct indication, and the third indication information is a transfer indication, and the first session management function device stores the corresponding relationship between the third QoS flow and the indirect path, indicating that the third QoS flow after transfer It is a QoS flow established on an indirect path.

In the above implementation scenario, the method 500 further includes: the first session management function device sends third indication information and third QoS configuration information to the first access network device.

Correspondingly, the first access network device receives third indication information and third QoS configuration information.

In the above implementation scenario, the method 500 further includes: the first access network device sending third resource configuration information to the terminal device through the first communication path.

Correspondingly, the terminal device receives the third resource configuration information through the first communication path.

The third resource configuration information is used to configure access network resources of the third QoS flow.

Specifically, the access network resources of the third QoS flow include the DRB of the third QoS flow.

Specifically, the DRB of the third QoS flow may include the DRB of the Uu interface, or, the DRB of the third QoS flow includes the DRB of the Uu interface and the DRB of the PC5 interface.

Wherein, the third resource configuration information is determined according to the third indication information and the third QoS configuration information.

As an example, the third resource configuration information is determined by the first access network device.

For example, the second communication path is a path through which the terminal device is directly connected to the first access network device. In this case, the first access network device may determine the path of the third QoS flow according to the third indication information, and The QoS configuration information determines the third resource configuration information, and sends the third resource configuration information to the terminal device through the first communication path.

As yet another example, the third resource configuration information is determined by the second access network device.

For example, the second communication path is a path directly connecting the terminal device to the second access network device. In this case, the first access network device may determine the path of the third QoS flow according to the third indication information, and send the third The QoS configuration information is sent to the second access network device, and the second access network device determines the third resource configuration information according to the third QoS configuration information, and then sends it to the first access network device.

In the above implementation scenario, the method 500 further includes: the first access network device deletes the access network resources of the third QoS flow on the first communication path according to the third indication information.

Specifically, as an implementation, in the above implementation scenario, the third resource configuration information is specifically used to: allocate the access network resources of the third QoS flow on the second communication path, and delete the third QoS flow on the first Access network resources for communication paths. That is, the third resource configuration information is not only used to allocate the access network resources of the third QoS flow on the second communication path to the terminal device, but also used to configure the terminal device to delete the access network resources of the third QoS flow on the first communication path. resource.

Specifically, as another implementation manner, in the above implementation scenario, the third resource configuration information is specifically used to: allocate the access network resources of the third QoS flow on the second communication path, and the method further includes: the first access The network access device sends fourth configuration information to the terminal device, where the fourth configuration information is used to delete the access network resources of the third QoS flow on the first communication path. That is, the third resource configuration information is used to allocate the access network resources of the third QoS flow on the second communication path to the terminal device, and the fourth configuration information is used to configure the terminal device to delete the access network resources of the third QoS flow on the first communication path. access to resources.

According to the method provided in the above implementation scenario, the terminal device and the first access network device can transfer the third QoS flow to the second communication path, so that the communication paths between the terminal device and the data network are diversified, and the efficiency of data transmission can be improved. rate, or to provide reliability of data transmission.

Optionally, in an implementation scenario of the foregoing embodiment, the first request message includes fourth indication information, where the fourth indication information is used to indicate the determined session management function device that supports multipath communication.

Specifically, the fourth indication information may be "Multi-Path indication".

Wherein, the session management function device supporting multi-path communication refers to that the session management function device supports the management of the direct connection path and the non-direct connection communication path at the same time.

Optionally, in the above implementation scenario, the method 500 further includes: the access and mobility management function device determines the first session management function device according to the fourth indication information, and the first session management function device supports multipath communication.

Specifically, the access and mobility management function device may select the first session management function device from multiple session management function devices supporting multipath communication according to the fourth indication information.

Further, the access and mobility management function device sends the first request message to the first session management function device.

According to the method provided in the above implementation scenario, the terminal device and the first access network device can also transfer the third QoS flow to the second communication path, so that the communication paths between the terminal device and the data network are diversified, and data transmission can be improved rate, or to provide the reliability of data transmission

The description below is divided into case 1 and case 2 according to the specific paths referred to by the first communication path and the second communication path.

Case 1. The first communication path is a direct connection path. Specifically, the direct connection path is a path for the terminal device to directly connect to the first access network device, and the second communication path is a non-direct connection path.

It should be understood that in case 1, the first access network device is a device that provides access services for terminal devices.

In addition, in case 1, the information exchange between the terminal device and the first access network device is all through the direct connection path.

In case 1, according to the specific content indicated by the first indication information, it is divided into case 1-1 and case 1-2 for description.

In case 1-1, the first indication information is used to indicate the establishment of the first QoS flow on the first communication path.

In this case, the first resource configuration information includes configuration information of the Uu interface between the terminal device and the first access network device.

Specifically, the configuration information of the Uu interface between the terminal device and the first access network device can be understood as the Uu-PDCP layer, Uu-RLC layer, Uu-MAC layer, Configuration of the Uu-PHY layer.

Wherein, in case 1-1, the access network resources of the first QoS flow may include resources configured in the first resource configuration information.

In case 1-2, the first indication information is used to indicate the establishment of the first QoS flow on the second communication path.

In this case, the method 500 may further include: the first access network device acquires the cell identity of the first relay terminal device, and the devices on the second communication path include the first relay terminal device.

Wherein, the cell identifier of the first relay terminal device may be understood as the cell identifier of the access cell of the first relay terminal device. The cell identifier of the first relay terminal device is used to determine the access network device of the first relay terminal device.

Specifically, the acquisition of the cell identity of the first relay terminal device by the first access network device may be implemented in the following manner.

Mode 1: The first access network device determines the first relay terminal device and the cell identity of the first relay terminal device according to the PC5 signal strength of at least one relay terminal device.

Specifically, the first access network device may send first measurement configuration information to the terminal device according to the first instruction information, where the first measurement configuration information is used to instruct the terminal device to measure the PC5 signal strength of at least one relay terminal device. A piece of measurement configuration information includes an identifier of at least one relay terminal device.

Wherein, the identifier (identifier, ID) of the relay terminal device may be a cell-radio network temporary identifier (C-RNTI), a globally unique temporary UE identity (GUTI) or a temporary mobile User identity (serving-temporary mobile subscriber identity, S-TMSI).

The terminal device receives the first measurement configuration information, and then measures the PC5 signal strength of at least one relay terminal device according to the first measurement configuration information.

Wherein, the PC5 signal strength of at least one relay terminal device refers to the signal strength of the PC5 connection between each of the at least one relay terminal device and the terminal device.

The terminal device sends a first measurement report to the first access network device, where the first measurement report includes the identifier of the at least one relay terminal device, the cell identifier of at least one relay terminal device, and the PC5 signal of at least one relay terminal device strength.

Wherein, the cell identifier of at least one relay terminal device may be a new radio cell global identifier (NR cell global identifier, NCGI).

The first access network device determines the first relay terminal device according to the PC5 signal strength of at least one relay terminal device.

Specifically, as an example, the first access network device may select the first relay terminal device according to the PC5 signal strength of at least one relay terminal device, for example, select the one with the best PC5 signal strength from at least one relay terminal device The relay terminal device serves as the first relay terminal device.

Specifically, as yet another example, the first access network device may select at least one candidate relay terminal device according to the cell identifier of at least one relay terminal device, and determine the first center cell according to the PC5 signal strength of at least one candidate relay terminal device. following terminal equipment.

For example, at least one relay terminal device includes N relay terminal devices, where N is a positive integer, and the first access network device determines M candidate relay terminal devices according to the cell identities of the N relay terminal devices, and the M candidate relay terminal devices The cell identities of the relay terminal devices correspond to the same access network device, for example, the cell identities of the M candidate relay terminal devices all correspond to the first access network device, and the first access network device selects from the M candidate relay terminal Among the devices, the relay terminal device with the best signal strength of PC5 is selected as the first relay terminal device.

Further, after the first relay terminal device is determined, the first access network device may determine the cell identity of the first relay terminal device according to the correspondence between at least one relay terminal device and the cell identity of at least one relay terminal device.

Mode 2: The first access network device receives a radio resource control (radio resource control, RRC) message from the terminal device, where the RRC message includes the cell identifier of the first relay terminal device.

Specifically, when the PC5 connection between the terminal device and the first relay terminal device is already in the connected state, the first access network device sends an RRC message to the terminal device, for example, a relay terminal request message, and the relay terminal requests The message is used to request the terminal device to report the information of the relay terminal device. Further, the terminal device replies an RRC message to the first access network device, for example, a relay terminal response message, where the relay terminal response message includes the identifier of the first relay terminal device and the cell identifier of the first relay terminal device.

Way 3: The first access network device receives a first message from the first session management function device or the access and mobility management function device, where the first message includes the cell identifier of the first relay terminal device.

Specifically, when the PC5 connection between the terminal device and the first relay terminal device is already in the connected state, the terminal device may carry the identifier of the first relay terminal device and the ID of the first relay terminal device in the first request message. For the cell identifier, the first session management functional device or the access and mobility management functional device may send a first message to the first access network device, where the first message includes the cell identifier of the first relay terminal device.

For example, in S530, the first message is sent together with the first QoS configuration information.

In case 1-2, the method 500 may further include: the first access network device determines the access network device of the first relay terminal device according to the cell identifier of the first relay terminal device.

Specifically, the first access network device may determine, according to the cell identifier of the first relay terminal device, a device that provides access services for the first relay terminal device, that is, an access network device of the first relay terminal device.

It should be understood that there is a corresponding relationship between the cell identifier and the access network device, and the first access network device may determine the access network device of the first relay terminal device according to the cell identifier of the first relay terminal device and the corresponding relationship. For example, the cell identifier includes the identifier of the access network device, and the first access network device determines the access network device of the first relay terminal device according to the identifier of the access network device in the cell identifier.

In one embodiment, the access network device of the first relay terminal device is the first access network device, and the second communication path is an indirect path, and the indirect path is that the terminal device passes through the first relay terminal A path for the device to connect to the first access network device.

At this time, the first resource configuration information includes configuration information of the PC5 interface between the terminal device and the first relay terminal device, and configuration information of the Uu interface between the terminal device and the first access network device.

Specifically, the configuration information of the PC5 interface between the terminal device and the first relay terminal device can be understood as the configuration information of the PC5-RLC layer, PC5-MAC layer, and PC5-PHY layer for establishing a connection between the terminal device and the first relay terminal device. Configuration, the configuration information of the Uu interface between the terminal device and the first access network device is understood as the configuration of the Uu-PDCP layer for the terminal device to establish a connection with the first access network device through the first relay terminal device.

At this time, the first resource configuration information is determined by the first access network device.

In addition, in this implementation, the method 500 further includes: the first access network device generates fifth resource configuration information according to the first QoS configuration information, where the fifth resource configuration information includes the terminal device and the first relay terminal device configuration information of the PC5 interface between the first relay terminal device and the configuration information of the Uu interface between the first relay terminal device and the first access network device. Further, the first access network device sends fifth resource configuration information to the first relay terminal device.

Specifically, the configuration information of the PC5 interface between the terminal device and the first relay terminal device can be understood as the configuration information of the PC5-RLC layer, PC5-MAC layer, and PC5-PHY layer that the first relay terminal device establishes a connection with the terminal device. Configuration, the configuration information of the Uu interface between the first relay terminal device and the first access network device is understood as the Uu-RLC layer and Uu-MAC layer for the first relay terminal device to establish a connection with the first access network device , Uu-PHY layer configuration.

That is, the first access network device will transfer the configuration information of the PC5 interface between the first relay terminal device and the terminal device, and the configuration information of the Uu interface between the first relay terminal device and the first access network device The information is sent to the first relay terminal device, so as to complete the resource configuration of the first relay terminal device.

Wherein, in this implementation manner, the access network resources of the first QoS flow may include resources configured by the first resource configuration information and the fifth resource configuration information.

In yet another embodiment, the access network device of the first relay terminal device is a second access network device, and the second communication path is an indirect path, and the indirect path is that the terminal device passes through the first relay A path for the terminal device to connect to the second access network device.

At this time, the first resource configuration information includes configuration information of the PC5 interface between the terminal device and the first relay terminal device, and configuration information of the Uu interface between the terminal device and the second access network device.

Specifically, the configuration information of the PC5 interface between the terminal device and the first relay terminal device can be understood as the configuration information of the PC5-RLC layer, PC5-MAC layer, and PC5-PHY layer for establishing a connection between the terminal device and the first relay terminal device. Configuration, the configuration information of the Uu interface between the terminal device and the second access network device is understood as the configuration of the Uu-PDCP layer for the terminal device to establish a connection with the second access network device through the first relay terminal device.

At this time, the first resource configuration information is determined by the second access network device.

That is, the method 500 further includes: the first access network device sends a second message to the second access network device, the second message includes the first QoS configuration information, and the second access network device The first resource configuration information is determined, and further, the second access network device sends the first resource configuration information to the first access network device.

Optionally, the second message further includes the identifier of the first relay terminal device and the identifier of the terminal device.

In addition, in this implementation, the method 500 further includes: the second access network device generates sixth resource configuration information according to the first QoS configuration information, where the sixth resource configuration information includes the terminal device and the first relay terminal device The configuration information of the PC5 interface between, and the configuration information of the Uu interface between the first relay terminal device and the second access network device. Further, the second terminal device sends the sixth resource configuration information to the first relay terminal device.

Specifically, the configuration information of the PC5 interface between the terminal device and the first relay terminal device can be understood as the configuration information of the PC5-RLC layer, PC5-MAC layer, and PC5-PHY layer that the first relay terminal device establishes a connection with the terminal device. Configuration, the configuration information of the Uu interface between the first relay terminal device and the second access network device is understood as the Uu-RLC layer and Uu-MAC layer for the first relay terminal device to establish a connection with the second access network device , Uu-PHY layer configuration.

That is, the second access network device will transfer the configuration information of the PC5 interface between the terminal device and the first relay terminal device, and the configuration information of the Uu interface between the first relay terminal device and the second access network device The information is sent to the first relay terminal device, so as to complete the resource configuration of the first relay terminal device.

Wherein, in this implementation manner, the access network resources of the first QoS flow may include resources configured by the first resource configuration information and the sixth resource configuration information.

It should be understood that, for case 1-1, if the terminal device also sends the second request message or the third request message, the specific method for determining the first relay terminal device in the second communication path, the method for determining the first relay terminal device For the specific method of the access network device, refer to Case 1-2. In addition, for the content of the access network resource of the first QoS flow, refer to the description in Case 1-2.

Case 2: The first communication path is an indirect path. Specifically, the indirect path is a path for a terminal device to connect to the first access network device through a first relay terminal device, and the second communication path is a direct path.

It should be understood that in case 2, the first access network device is a device that provides access services for the first relay terminal device.

In addition, in case 2, the information exchange between the terminal device and the first access network device is through an indirect path.

In case 2, according to the specific content indicated by the first indication information, it is divided into case 2-1 and case 2-2 for description.

In case 2-1, the first indication information is used to indicate the establishment of the first QoS flow on the first communication path.

In this case, the first resource configuration information includes configuration information of the PC5 interface between the terminal device and the first relay terminal device, and configuration information of the Uu interface between the terminal device and the first access network device.

Wherein, in case 2-1, the access network resources of the first QoS flow may include resources configured in the first resource configuration information.

In case 2-2, the first indication information is used to indicate the establishment of the first QoS flow on the second communication path.

In this case, the method 500 may further include: the first access network device acquires the access network device of the terminal device.

Specifically, the acquisition of the access network device of the terminal device by the first access network device may be implemented in the following manner.

Mode 1: The first access network device determines the access network device of the terminal device according to the signal strength of the cell where the terminal device can camp.

Specifically, the first access network device may send second measurement configuration information to the terminal device according to the first indication information, where the second measurement configuration information is used to instruct the terminal device to measure the resident cell and the resident cell of the terminal device. The signal strength of the cell.

The terminal device receives the second measurement configuration information, and then measures the campable cell and the cell signal strength of the campable cell according to the second measurement configuration information.

The terminal device sends a second measurement report to the first access network device, where the second measurement report includes the cell identity of the cell where the terminal device can camp and the cell signal strength of the cell where the terminal device can camp.

Wherein, the cell identifier of the cell that can reside may be a new radio cell global identifier (NR cell global identifier, NCGI).

Further, the first access network device may determine the access cell of the terminal device according to the cell signal strength of the cell where the terminal device can reside, and determine the device that provides access services for the terminal device according to the cell identifier of the access cell of the terminal device, that is, the terminal The device's access network device.

For example, the first access network device selects the resident cell with the best cell signal strength as the access cell of the terminal device, and determines The access network equipment of the terminal equipment.

Method 2: The first access network device receives an RRC message from the terminal device, where the RRC message includes the cell identifier of the terminal device, and the first access network device determines the access network device of the terminal device according to the cell identifier of the terminal device.

Specifically, when a connection has been directly established between the terminal device and a certain access network device, the first access network device sends an RRC message to the terminal device, and the RRC message is used to request the terminal device to report the cell information of the terminal device . Further, the terminal device replies an RRC response message to the first access network device, where the RRC response message includes the identifier of the terminal device and the cell identifier of the terminal device.

The first access network device determines a device that provides access services for the terminal device according to the cell identifier of the terminal device, that is, the access network device of the terminal device. For example, the cell identifier includes the identifier of the access network device, and the first access network device determines the access network device of the terminal device according to the identifier of the access network device in the cell identifier.

Mode 3: The first access network device receives a fourth message from the first session management function device or access and mobility management function device, where the fourth message includes the cell identifier of the terminal device, and the first access network device receives the fourth message according to the terminal device The cell identity of the device determines the access network device of the terminal device.

Specifically, when a connection has been directly established between the terminal device and a certain access network device, the terminal device may carry the identifier of the terminal device and the cell identifier of the terminal device in the first request message, and the first session management function device Or, the access and mobility management functional device may send a fourth message to the first access network device, where the fourth message includes the cell identifier of the terminal device.

For example, in S530, the fourth message is sent together with the first QoS configuration information.

The first access network device determines, according to the cell identifier of the terminal device, a device that provides access services for the terminal device, that is, an access network device of the terminal device. For example, the cell identifier includes the identifier of the access network device, and the first access network device determines the access network device of the terminal device according to the identifier of the access network device in the cell identifier.

Wherein, in the above manners 1 to 3, the cell identifier of the terminal device may be understood as the cell identifier of the access cell of the terminal device.

In an implementation manner, the access network device of the terminal device is a first access network device, and the second communication path is a direct connection path, and the direct connection path is a path for the terminal device to directly connect to the first access network device.

At this time, the first resource configuration information includes configuration information of the Uu interface between the terminal device and the first access network device.

Wherein, in this implementation manner, the access network resources of the first QoS flow may include resources configured in the first resource configuration information.

In yet another implementation manner, the access network device of the terminal device is a second access network device, and the second communication path is a direct connection path, and the direct connection path is a path for the terminal device to directly connect to the second access network device.

At this time, the first resource configuration information includes configuration information of the Uu interface between the terminal device and the second access network device.

Specifically, the configuration information of the Uu interface between the terminal device and the second access network device can be understood as the Uu-PDCP layer, Uu-RLC layer, Uu-MAC layer, Configuration of the Uu-PHY layer.

That is, the method 500 further includes: the first access network device sends a third message to the second access network device, where the third message includes the first QoS configuration information, and the second access network device The first resource configuration information is determined, and further, the second access network device sends the first resource configuration information to the first access network device.

Optionally, the third message further includes an identifier of the terminal device.

It should be understood that for case 2-1, if the terminal device also sends the second request message or the third request message, the specific method for determining the access network device of the terminal device can refer to case 2-2. In addition, the first QoS flow For the content of the access network resources, refer to the description in Case 2-2.

It should be noted that each implementation scenario of the embodiment shown in the method 500 may be implemented independently, or may be combined with each other, which is not limited.

FIG. 6 is a schematic diagram of a data transmission method 600 provided by an embodiment of the present application. The method 600 may be regarded as a specific implementation manner of the method 500, and the method 600 may include the following steps.

S601, the remote UE sends a request message #1 to the AMF on the direct path.

Specifically, the remote UE sends a request message #1 (an example of the first request message) to the gNB1, and the gNB1 sends the request message #1 to the AMF.

The request message #1 includes indication information #1 (an example of first indication information), the indication information #1 is a direct indication, and the direct indication is used to instruct to establish a QoS flow on the direct path.

The request message #1 also includes indication information #4 (an example of fourth indication information), where the indication information #4 is a Multi-Path indication, and the Multi-Path indication is used to instruct the AMF to select an SMF supporting multi-path communication.

The request message #1 may be a PDU session establish request (PDU session establish request) message.

The remote UE can send request message #1 through UL NAS message.

The request message #1 may include the PDU session ID of the PDU session #1.

The gNB1 is a base station that provides services for remote UEs.

S602. The AMF sends a request message #1 to the SMF.

The AMF determines the SMF supporting multipath according to the indication information #4, and sends a request message #1 to the SMF.

The AMF may send a request message #1 to the SMF through an N11 message, and the N11 message may be a PDU session creation context request (Nsmf_PDUsession_createSMcontext request) message or the like.

S603, the SMF determines QoS configuration information #1 according to the request message #1.

The SMF determines QoS configuration information #1 (an example of the first QoS configuration information) according to the request message #1, and the QoS configuration information #1 includes QoS parameters of the QoS flow #1 (an example of the first QoS flow).

In addition, the path of the QoS flow #1 established by the SMF record is a direct path.

S604, the SMF sends indication information #1, QoS configuration information #1 and response message #1 to gNB1.

Specifically, the response message #1 is used to respond to the request message #1.

The response message #1 may be a PDU session establish accept (PDU session establish accept) message.

Specifically, the SMF may first send an N11 message to the AMF, the N11 message includes an N1 SM container and an N2SM container, the N1 SM container includes a response message #1, and the N2 SM container includes indication information #1 and QoS configuration information #1, wherein , the N11 message may be a N1N2 message transfer (Namf_communication_N1N2MessageTransfer) message.

Further, AMF sends N2 SM container and N1 SM container to gNB1.

S605, gNB1 sends resource configuration information #1 and response message #1 to the remote UE.

gNB1 determines resource configuration information #1 (an example of the first resource configuration information) according to QoS configuration information #1. The resource configuration information #1 is used to configure the Uu interface between the remote UE and gNB1 (including the Uu- PDCP layer, Uu-RLC layer, Uu-MAC layer, Uu-PHY layer) air interface resources.

gNB1 sends resource configuration information #1 and N1 SM container to the remote UE.

After S601 to S605, QoS flow #1 is established on the direct path of the remote UE.

It should be understood that, in the process from S601 to S605, one or more QoS flows may be established, and the method 600 uses one as an example for illustration, and this one QoS flow is QoS flow #1.

S606, the remote UE sends a request message #2 to the AMF on the direct path.

If the remote UE needs to transmit data on the non-direct path, the remote UE sends a request message #2 to the AMF on the direct path.

Specifically, the remote UE sends a request message #2 (an example of a second request message) to the gNB1, and the gNB1 sends the request message #2 to the AMF.

The request message #2 includes indication information #2 (an example of second indication information), where the indication information #2 is an indirect indication, and the indirect indication is used for instructing to establish a QoS flow on a non-direct path.

The request message #2 may be a PDU session modification request (PDU session modification request) message, and the request message #2 may include the PDU session ID of the PDU session #1.

The remote UE can send request message #2 through UL NAS message.

S607, AMF sends request message #2 to SMF.

The AMF may send the request message #2 to the SMF through the N11 message, and the N11 message may be a PDU session update context request (Nsmf_PDUsession_updateSMcontext request) message or the like.

S608, the SMF determines QoS configuration information #2 according to the request message #2.

The SMF determines QoS configuration information #2 (an example of the second QoS configuration information) according to the request message #2, and the QoS configuration information #2 includes QoS parameters of the QoS flow #2 (an example of the second QoS flow).

In addition, the path of the QoS flow #2 established by the SMF record is an indirect path.

S609, the SMF sends indication information #2, QoS configuration information #2 and response message #2 to gNB1.

Specifically, the response message #2 is used to respond to the request message #2.

The response message #2 may be a PDU session modification accept (PDU session modification accept) message.

Specifically, the SMF may first send an N11 message to the AMF, the N11 message includes an N1 SM container and an N2 SM container, the N1 SM container includes a response message #2, and the N2 SM container includes indication information #2 and QoS configuration information #2, Wherein, the N11 message may be a PDU session update context response (Nsmf_PDUsession_updateSMcontext response) message.

Further, AMF sends N2 SM container and N1 SM container to gNB1.

S610, gNB1 sends measurement configuration information #1 to the remote UE according to indication information #2.

The measurement configuration information #1 is used to instruct the remote UE to report PC5 strength signals of one or more relay UEs.

S611, the remote UE sends a measurement report #1 to gNB1.

Specifically, the remote UE measures the PC5 signal strength of one or more relay UEs, and sends a measurement report #1 to gNB1, and the measurement report #1 includes IDs and cell IDs of one or more relay UEs and PC5 signal strength.

S612, gNB1 determines the relay UE1.

The gNB1 determines the relay UE1 according to the PC5 signal strength of one or more relay UEs.

S613, gNB1 determines a base station for relaying UE1.

The gNB1 determines, according to the cell identity of the relay UE1, that the base station providing the access service for the relay UE1 is gNB1.

S614, gNB1 sends resource configuration information #2 to relay UE1.

Specifically, gNB1 determines resource configuration information #2 (an example of fifth resource configuration information) according to QoS configuration information #2, and the resource configuration information #2 is used to configure the Uu interface between relay UE1 and gNB1 (including relay UE1 Uu-RLC layer, Uu-MAC layer, Uu-PHY layer), and the PC5 interface between the remote UE and the relay UE1 (including the PC5-RLC layer, PC5-MAC layer, PC5 -PHY layer) air interface resources.

Further, gNB1 sends the resource configuration information #2 to the relay UE1. For example, the resource configuration information #2 is sent to the relay UE1 through an RRC configuration message.

S615, gNB1 sends the resource configuration information #13 and response message #2 to the remote UE.

Specifically, gNB1 determines resource configuration information #13 (an example of second resource configuration information) according to QoS configuration information #2, and the resource configuration information #13 is used to configure the Uu interface between the remote UE and gNB1 (including the remote UE The air interface resources of the Uu-PDCP layer) and the air interface resources of the PC5 interface between the remote UE and the relay UE1 (including the PC5-RLC layer, PC5-MAC layer, and PC5-PHY layer of the remote UE).

gNB1 can send an RRC configuration message to the remote UE, and the RRC configuration message includes resource configuration information #13 and N1 SM container.

After S601 to S615, QoS flow #1 is established on the direct path of the remote UE, QoS flow #2 is established on the non-direct path of the remote UE, and the base station of the direct path and the base station of the non-direct path same.

It should be understood that S610 to S612 are mainly applicable to the scenario where the remote UE is not connected to the relay UE, and in the case that the remote UE is not connected to the relay UE, S610 to S612 can be used to determine based on information of one or more relay UEs Relay UE1.

In another implementation manner, when the remote UE is already in the connected state with the relay UE1, the following alternative solutions are included.

Alternative 1, including S616 and S617, replace S610 to S612 with S616 and S617. specifically:

S616, gNB1 sends an RRC message to the remote UE, where the RRC message is used to request information of the relay UE.

S617, the remote UE sends an RRC message to the gNB1, the RRC message is used to respond to S616, and the RRC message includes the identifier of the relay UE1 and the cell identifier of the relay UE1.

Alternative solution 2, delete S610 to S612, S606, S607 and S609 include the identity of UE1 and the cell identity of the relay UE1. specifically:

S606 and S607 include the identity of the relay UE1 and the cell identity of the relay UE1. In S609, the SMF sends the identity of the relay UE1 and the cell identity of the relay UE1 to the gNB1 through the N2 container.

Alternative 3: Delete S610 to S612, S606 and S609 include the identity of the relay UE1 and the cell identity of the relay UE1. specifically:

S606 includes the identity of the relay UE1 and the cell identity of the relay UE1. In S609, when the AMF sends the N2 container to the gNB1, the N2 SM container includes the identity of the relay UE1 and the cell identity of the relay UE1.

Wherein, the UPF is the UPF that provides services for the remote UE, and the AMF is the AMF that provides services for the remote UE. (a) of FIG. 7 is a schematic diagram of the data transmission path of the remote UE after S601 to S605. As shown in (a) of FIG. 7 , the data transmission path between the remote UE and the UPF is a direct path. (b) of FIG. 7 is a schematic diagram of the data transmission path of the remote UE after S606 to S615. As shown in (b) of FIG. 7, the data transmission path between the remote UE and the UPF is a direct path and a non- direct path.

FIG. 8 is a schematic diagram of a data transmission method 800 provided by an embodiment of the present application. The method 800 may be regarded as a specific implementation manner of the method 500, and the method 800 may include the following steps.

S801 to S812 may refer to S601 to S612.

S813, gNB1 determines a base station for relaying UE1.

The gNB1 determines, according to the cell identity of the relay UE1, that the base station providing the access service for the relay UE1 is gNB2.

S814, gNB1 sends an addition request message #1 to gNB2.

The add request message #1 is used to request to add a data channel.

The adding request message #1 includes the uplink tunnel address of the UPF, the information of the remote UE, the QoS configuration information #2, the identifier of the relay UE and the QFI of the QoS flow #2. Wherein, the information of the remote UE includes an identifier of the remote UE, capability information of the remote UE, security-related information of the remote UE, subscription information, and the like.

S815, gNB2 sends an addition response message #1 to gNB1.

The addition response message #1 includes the downlink tunnel address of gNB2, resource configuration information #3 (another example of sixth resource configuration information), and resource configuration information #14 (an example of second resource configuration information).

Specifically, gNB2 determines resource configuration information #3 according to QoS configuration information #2, and the resource configuration information #3 is used to configure the Uu interface between relay UE1 and gNB2 (including Uu-RLC layer, Uu-MAC layer of relay UE1 layer, Uu-PHY layer), and the air interface resources of the PC5 interface between the remote UE and the relay UE1 (including the PC5-RLC layer, PC5-MAC layer, and PC5-PHY layer of the relay UE1).

In addition, gNB2 can also determine resource configuration information #14 (an example of second resource configuration information) according to QoS configuration information #2 and remote UE information, and the resource configuration information #14 is used to configure the remote UE and gNB2 The air interface resources of the Uu interface (including the Uu-PDCP layer of the remote UE), and the PC5 interface between the remote UE and the relay UE1 (including the PC5-RLC layer, PC5-MAC layer, and PC5-PHY layer of the remote UE ) air interface resources.

S816, gNB1 sends the resource configuration information #14 and the response message #2 to the remote UE.

gNB1 can send an RRC configuration message to the remote UE, and the RRC configuration message includes resource configuration information #14 and N1 SM container.

S817, gNB2 sends the resource configuration information #3 to the relay UE1.

For example, gNB2 sends the resource configuration information #3 to the relay UE1 through an RRC configuration message.

S818, gNB1 sends the downlink tunnel address information of gNB2 and the QFI of QoS flow #2 to the SMF.

Specifically, gNB1 may send a PDU session resource modify request (PDU session resource modify request) message to the AMF, and the PDU session resource modify request message includes the downlink tunnel address information of gNB2 and the QFI of QoS flow #2.

Further, the AMF may send an N11 message to the SMF, and the N11 message may be a PDU session update context request (Nsmf_PDUsession_updateSMcontext request) message, etc., and the N11 message includes the downlink tunnel address information of gNB2 and the QFI of QoS flow #2.

S819, the SMF replies to the gNB1 with the updated uplink tunnel address of the UPF.

Specifically, the SMF may send an N11 message to the AMF, and the N11 message may be a PDU session update context response (Nsmf_PDUsession_updateSMcontext response) message, etc., and the N11 message includes the uplink tunnel address of the updated UPF.

Further, the AMF may send a PDU session resource modify response (PDU session resource modify response) message to gNB1, where the PDU session resource modify response message includes the updated uplink tunnel address of the UPF.

S820, gNB1 sends the updated uplink tunnel address of the UPF to gNB2, and gNB2 replies with a response message.

Specifically, gNB1 may send a modify request (modify request) message to gNB2, where the modify request message includes the updated uplink tunnel address of the UPF.

The response message returned by gNB2 may be a modify response (modify response) message.

It should be understood that S818 to S820 are the process of establishing an N3 tunnel for QoS flow #2, wherein the N3 tunnel is to establish a tunnel between gNB2 and UPF, and the uplink tunnel address of the N3 tunnel is the updated uplink tunnel address of the UPF. The downlink tunnel address of the N3 tunnel is the downlink tunnel address of gNB2.

After S801 to S820, QoS flow #1 is established on the direct path of the remote UE, QoS flow #2 is established on the non-direct path of the remote UE, and the base station of the direct path and the base station of the non-direct path different.

It should be understood that alternatives in method 600 apply to method 800 as well.

Wherein, the UPF is the UPF that provides services for the remote UE, and the AMF is the AMF that provides services for the remote UE. (a) of FIG. 9 is a schematic diagram of the data transmission path of the remote UE after S801 to S805. As shown in (a) of FIG. 9 , the data transmission path between the remote UE and the UPF is a direct path. (b) of FIG. 9 is a schematic diagram of the data transmission path of the remote UE after S806 to S820. As shown in (b) of FIG. 9, the data transmission path between the remote UE and the UPF is a direct path and a direct path.

FIG. 10 is a schematic diagram of a data transmission method 1000 provided by an embodiment of the present application. The method 1000 may be regarded as a specific implementation manner of the method 500, and the method 1000 may include the following steps.

S1001. The remote UE sends a request message #3 to the AMF on the indirect path.

Specifically, the remote UE sends the request message #3 to the relay UE (an example of the first request message), the relay UE sends the request message #3 to the gNB1, and the gNB1 sends the request message #3 to the AMF.

The request message #3 includes indication information #3 (an example of first indication information), where the indication information #3 is an indirect indication, and the indirect indication is used to instruct to establish a QoS flow on a non-direct path.

The request message #3 also includes indication information #4 (an example of fourth indication information), where the indication information #4 is a Multi-Path indication, and the Multi-Path indication is used to instruct the AMF to select an SMF supporting multi-path communication.

The request message #3 may be a PDU session establish request (PDU session establish request) message.

The remote UE can send request message #1 through UL NAS message.

The request message #3 may include the PDU session ID of the PDU session #1.

The gNB1 is a base station serving the relay UE.

S1002. The AMF sends a request message #3 to the SMF.

The AMF determines the SMF supporting multipath according to the indication information #4, and sends a request message #3 to the SMF.

The AMF may send a request message #3 to the SMF through the N11 message, and the N11 message may be a PDU session creation context request (Nsmf_PDUsession_createSMcontext request) message or the like.

S1003. The SMF determines QoS configuration information #3 according to the request message #3.

The SMF determines QoS configuration information #3 (an example of the first QoS configuration information) according to the request message #3, and the QoS configuration information #3 includes QoS parameters of the QoS flow #3 (an example of the first QoS flow).

In addition, the path of the QoS flow #3 established by the SMF record is an indirect path.

S1004, the SMF sends indication information #3, QoS configuration information #3 and response message #3 to gNB1.

Specifically, the response message #3 is used to respond to the request message #3.

The response message #3 may be a PDU session establish accept (PDU session establish accept) message.

Specifically, the SMF may first send an N11 message to the AMF, the N11 message includes an N1 SM container and an N2 SM container, the N1 SM container includes a response message #3, and the N2 SM container includes indication information #3 and QoS configuration information #3, Wherein, the N11 message may be a N1N2 message transfer (Namf_communication_N1N2MessageTransfer) message.

Further, AMF sends N2 SM container and N1 SM container to gNB1.

S1005, gNB1 sends resource configuration information #4 and response message #3 to the remote UE.

gNB1 determines resource configuration information #4 (an example of the first resource configuration information) according to QoS configuration information #3, and the resource configuration information #4 is used to configure the PC5 interface between the remote UE and the relay UE (including the PC5-RLC layer, PC5-MAC layer, PC5-PHY layer) air interface resources, and the Uu interface between the remote UE and gNB1 (including the Uu-PDCP layer of the remote UE) air interface resources.

In addition, gNB1 determines resource configuration information #15 according to QoS configuration information #3, and the resource configuration information #15 is used to configure the PC5 interface between the relay UE and gNB1 (including the PC5-RLC layer and PC5-MAC layer of the relay UE1 , PC5-PHY layer), and the air interface resources of the Uu interface between the relay UE1 and gNB1 (including the Uu-RLC layer, Uu-MAC layer, and Uu-PHY layer of the relay UE).

gNB1 sends resource configuration information #4 and N1 SM container to the remote UE, and sends resource configuration information #15 to the relay UE.

After S1001 to S1005, QoS flow #3 is established on the indirect path of the remote UE.

It should be understood that, in the process from S1001 to S1005, one or more QoS flows may be established, and the method 1000 uses one as an example for illustration, and this one QoS flow is QoS flow #3.

S1006, the remote UE sends a request message #4 to the AMF on the indirect path.

If the remote UE needs to transmit data on the direct path, the remote UE sends a request message #4 to the AMF on the non-direct path.

Specifically, the remote UE sends a request message #4 (an example of a second request message) to the gNB1, and the gNB1 sends the request message #4 to the AMF.

The request message #4 includes indication information #5 (an example of second indication information), where the indication information #5 is a direct indication, and the direct indication is used to instruct to establish a QoS flow on the direct path.

The request message #4 may be a PDU session modification request (PDU session modification request) message, and the request message #4 may include the PDU session ID of the PDU session #1.

The remote UE can send request message #4 through UL NAS message.

S1007, AMF sends request message #4 to SMF.

The AMF may send the request message #4 to the SMF through the N11 message, and the N11 message may be a PDU session update context request (Nsmf_PDUsession_updateSMcontext request) message or the like.

S1008, the SMF determines QoS configuration information #4 according to the request message #4.

The SMF determines QoS configuration information #4 (an example of second QoS configuration information) according to the request message #4, and the QoS configuration information #4 includes the QoS parameters of the QoS flow #4.

In addition, the path of the QoS flow #4 established by the SMF record is a direct path.

S1009, the SMF sends indication information #5, QoS configuration information #4 and response message #4 to gNB1.

Specifically, the response message #4 is used to respond to the request message #4.

The response message #4 may be a PDU session modification accept (PDU session modification accept) message.

Specifically, the SMF may first send an N11 message to the AMF, the N11 message includes N1 SM container and N2 SM container, the N1 SM container includes the response message #4, and the N2 SM container includes indication information #5 and QoS configuration information #4 , wherein, the N11 message may be a PDU session update context response (Nsmf_PDUsession_updateSMcontext response) message.

Further, AMF sends N2 SM container and N1 SM container to gNB1.

S1010, gNB1 sends measurement configuration information #2 to the remote UE according to indication information #5.

The measurement configuration information #2 is used to instruct the remote UE to report the cell on which it can camp.

S1011, the remote UE sends measurement report #2 to gNB1.

Specifically, the remote UE measures the resident cell and the signal strength of the resident cell, and sends a measurement report #2 to gNB1, the measurement report #2 includes the cell identity of the resident cell and the cell signal of the resident cell strength.

S1012, gNB1 determines the base station of the remote UE.

gNB1 determines that the base station of the remote UE is gNB1 according to the cell identity of the cell that can camp on and the cell signal strength of the cell that can camp on.

S1013, gNB1 sends resource configuration information #5 and response message #4 to the remote UE.

Specifically, gNB1 determines resource configuration information #5 (an example of second resource configuration information) according to QoS configuration information #4, and the resource configuration information #5 is used to configure the Uu interface between the remote UE and gNB1 (including the remote UE Uu-PDCP layer, Uu-RLC layer, Uu-MAC layer, Uu-PHY layer) air interface resources.

gNB1 can send an RRC configuration message to the remote UE, and the RRC configuration message includes resource configuration information #5 and N1 SM container.

In another implementation manner, when the remote UE has established a connection with a certain gNB, the following alternative solutions are included.

Alternative 1, including S1014 and S1016, replace S1010 to S1012 with S1014 and S1015. specifically:

S1014, gNB1 sends an RRC message to the remote UE, where the RRC message is used to request information of the remote UE.

S1015, the remote UE sends an RRC message to gNB1, the RRC message is used to respond to S1014, and the RRC message includes the cell identity of the remote UE.

S1016, gNB1 determines that the gNB connected to the remote UE is gNB1 according to the cell identity of the remote UE.

Alternative 2, delete S1010 to S1012, S1006, S1007 and S1009 include the cell identity of the remote UE. specifically:

S1006 and S1007 include the cell identity of the remote UE, and in S1009, the SMF sends the cell identity of the remote UE to gNB1 through the N2 container.

Alternative 2 also includes the above S1016.

Alternative 3: Delete S1010 to S1012, S1006 and S1009 include the cell identity of the remote UE. specifically:

S1006 includes the cell identity of the remote UE, and in S1009, when the AMF sends the N2 container to gNB1, the N2 SM container includes the cell identity of the remote UE.

Alternative solution 3 also includes the above S1016.

After S1001 to S1013, QoS flow #3 is established on the non-direct path of the remote UE, QoS flow #4 is established on the direct path of the remote UE, and the base station of the direct path and the base station of the non-direct path same.

Wherein, the UPF is the UPF that provides services for the remote UE, and the AMF is the AMF that provides services for the remote UE. (a) of FIG. 11 is a schematic diagram of the data transmission path of the remote UE after S1001 to S1005. As shown in (a) of FIG. 11 , the data transmission path between the remote UE and the UPF is an indirect path. (b) of FIG. 11 is a schematic diagram of the data transmission path of the remote UE after S1006 to S1013. As shown in (b) of FIG. 11 , the data transmission path between the remote UE and the UPF is an indirect path and direct path.

FIG. 12 is a schematic diagram of a data transmission method 1200 provided by an embodiment of the present application. The method 1200 may be regarded as a specific implementation manner of the method 500, and the method 1200 may include the following steps.

For S1201 to S1211, refer to S1001 to S1011.

S1212, gNB1 determines the base station of the remote UE.

gNB1 determines that the base station of the remote UE is gNB2 according to the cell identity of the cell that can camp on and the cell signal strength of the cell that can camp on.

S1213, gNB1 sends an addition request message #2 to gNB2.

The add request message #2 is used to request to add a data channel.

The adding request message #2 includes the uplink tunnel address of the UPF, information of the remote UE, QoS configuration information #4 and QFI of the QoS flow #4. Wherein, the information of the remote UE includes security-related information and subscription information of the remote UE.

S1214, gNB2 sends an addition response message #2 to gNB1.

The addition response message #2 includes the downlink tunnel address of gNB2 and resource configuration information #6 (another example of the second resource configuration information).

Specifically, gNB2 determines resource configuration information #6 according to QoS configuration information #4, and the resource configuration information #6 is used to configure the Uu interface between the remote UE and gNB2 (including the Uu-PDCP layer of the remote UE, Uu-RLC layer, Uu-MAC layer, Uu-PHY layer) air interface resources.

S1215, gNB1 sends the resource configuration information #6 and response message #4 to the remote UE.

gNB1 can send an RRC configuration message to the remote UE, and the RRC configuration message includes resource configuration information #6 and N1 SM container.

S1216, gNB1 sends the downlink tunnel address information of gNB2 and the QFI of QoS flow #4 to the SMF.

Specifically, gNB1 may send a PDU session resource modify request (PDU session resource modify request) message to AMF, and the PDU session resource modify request message includes the downlink tunnel address information of gNB2 and the QFI of QoS flow #4.

Further, the AMF may send an N11 message to the SMF, and the N11 message may be a PDU session update context request (Nsmf_PDUsession_updateSMcontext request) message, etc., and the N11 message includes the downlink tunnel address information of gNB2 and the QFI of QoS flow #4.

S1217, the SMF replies to the gNB1 with the updated uplink tunnel address of the UPF.

S1218, gNB1 sends the updated uplink tunnel address of the UPF to gNB2, and gNB2 replies with a response message.

It should be understood that S1216 to S1218 are the process of establishing an N3 tunnel for QoS flow #4, wherein the N3 tunnel is to establish a tunnel between gNB2 and UPF, and the uplink tunnel address of the N3 tunnel is the updated uplink tunnel address of the UPF. The downlink tunnel address of the N3 tunnel is the downlink tunnel address of gNB2.

After S1201 to S1218, QoS flow #3 is established on the non-direct path of the remote UE, QoS flow #4 is established on the direct path of the remote UE, and the base station of the direct path and the base station of the non-direct path different.

It should be understood that alternatives in method 1000 apply to method 1200 as well.

Wherein, the UPF is the UPF that provides services for the remote UE, and the AMF is the AMF that provides services for the remote UE. (a) of FIG. 13 is a schematic diagram of the data transmission path of the remote UE after S1201 to S1205. As shown in (a) of FIG. 13 , the data transmission path between the remote UE and the UPF is an indirect path. (b) of FIG. 13 is a schematic diagram of the data transmission path of the remote UE after S1206 to S1218. As shown in (b) of FIG. 13, the data transmission path between the remote UE and the UPF is an indirect path and direct path.

FIG. 14 is a schematic diagram of a data transmission method 1400 provided by an embodiment of the present application. The method 1400 may be regarded as a specific implementation manner of the method 500, and the method 1400 may include the following steps.

S1401 to S1405 can refer to S601 to S605. The method 1400 is described by taking the establishment of two QoS flows on the direct path of the remote UE, that is, QoS flow #1 and QoS flow #5 (two examples of the first QoS flow) as an example.

S1406, the remote UE sends a request message #5 to the AMF on the direct path.

If the remote UE needs to transmit data on the non-direct path, the remote UE sends a request message #5 (an example of the third request message) to the AMF on the direct path.

Specifically, the remote UE sends request message #5 to gNB1, and gNB1 sends request message #5 to AMF.

The request message #5 includes indication information #6 (an example of the third indication information) and the QFI of the QoS flow #5 (an example of the third QoS flow), and the indication information #6 is "transfer to indirect (transferred to non-direct connection) ) indication", the "transfer to indirect (transfer to non-direct connection) indication" is used to indicate that the QoS flow #5 is transferred to the non-direct connection path.

The request message #5 may be a PDU session modification request (PDU session modification request) message, and the request message #5 may include the PDU session ID of the PDU session #1.

The remote UE can send request message #5 through UL NAS message.

S1407. The AMF sends a request message #5 to the SMF.

The AMF may send a request message #5 to the SMF through the N11 message, and the N11 message may be a PDU session update context request (Nsmf_PDUsession_updateSMcontext request) message or the like.

S1408. The SMF determines QoS configuration information #5 according to the request message #5.

The SMF determines QoS configuration information #5 (an example of the third QoS configuration information) according to the request message #5, and the QoS configuration information #5 includes the QoS parameters of the QoS flow #5.

In addition, the path after the transfer of QoS flow #5 is recorded by the SMF as an indirect path.

S1409, the SMF sends the indication information #6, the QFI of the QoS flow #5, the QoS configuration information #5 and the response message #5 to the gNB1.

Specifically, the response message #5 is used to respond to the request message #5.

The response message #5 may be a PDU session modification accept (PDU session modification accept) message.

Specifically, the SMF may first send an N11 message to the AMF, the N11 message includes an N1 SM container and an N2 SM container, the N1 SM container includes a response message #5, and the N2 SM container includes the QFI indicating information #6 and QoS flow #5 and QoS configuration information #5, wherein the N11 message may be a PDU session update context response (Nsmf_PDUsession_updateSMcontext response) message.

Further, AMF sends N2 SM container and N1 SM container to gNB1.

S1410, gNB1 sends measurement configuration information #3 to the remote UE according to indication information #6.

The measurement configuration information #3 is used to instruct the remote UE to report the PC5 strength signals of one or more relay UEs.

S1411, the remote UE sends measurement report #3 to gNB1.

Specifically, the remote UE measures the PC5 signal strength of one or more relay UEs, and sends a measurement report #3 to gNB1, and the measurement report #3 includes IDs and cell IDs of one or more relay UEs and PC5 signal strength.

S1412, gNB1 determines to relay UE1.

S1413, gNB1 determines the base station for relaying UE1.

S1414, gNB1 sends resource configuration information #7 to relay UE1.

Specifically, gNB1 determines resource configuration information #7 (an example of sixth resource configuration information) according to QoS configuration information #5, and the resource configuration information #7 is used to configure the Uu interface between relay UE1 and gNB1 (including relay UE1 Uu-RLC layer, Uu-MAC layer, Uu-PHY layer), and the PC5 interface between the remote UE and the relay UE1 (including the PC5-RLC layer, PC5-MAC layer, PC5 -PHY layer) air interface resources.

Further, gNB1 sends the resource configuration information #7 to the relay UE1. For example, the resource configuration information #7 is sent to the relay UE1 through an RRC configuration message.

S1415, gNB1 sends the resource configuration information #16, resource configuration information #8 and response message #5 to the remote UE.

Specifically, gNB1 determines resource configuration information #16 (an example of the third resource configuration information) according to QoS configuration information #5, and the resource configuration information #16 is used to configure the Uu interface between the remote UE and gNB1 (including the remote UE The air interface resources of the Uu-PDCP layer) and the air interface resources of the PC5 interface between the remote UE and the relay UE1 (including the PC5-RLC layer, PC5-MAC layer, and PC5-PHY layer of the remote UE).

gNB1 can send an RRC configuration message to the remote UE, and the RRC configuration message includes resource configuration information #16 and N1 SM container.

In addition, gNB1 sends resource configuration information #8 (an example of the third resource configuration information and an example of the fourth resource configuration information) to the remote UE according to the indication information #6 and the QFI of the QoS flow #5. The resource configuration information #8 It is used to configure the remote UE to delete the air interface resources of QoS flow #5 on the direct path.

After S1401 to S1415, the QoS flow #5 of the direct path of the remote UE is transferred to the non-direct path, and the base station of the direct path is the same as the base station of the non-direct path.

It should be understood that alternatives in method 600 apply to method 1400 as well.

The difference between method 1400 and method 600 mainly lies in: the contents indicated by the indication information #6 and indication information #2 are different, and the method 1400 will also delete the QoS flow #5 while configuring the indirect path of the QoS flow #5 5 Air interface resources on the direct path.

Wherein, the UPF is the UPF that provides services for the remote UE, and the AMF is the AMF that provides services for the remote UE. (a) of FIG. 15 is a schematic diagram of the data transmission path of the remote UE after S1401 to S1405. As shown in (a) of FIG. 15 , the data transmission path between the remote UE and the UPF is a direct path. (b) of FIG. 15 is a schematic diagram of the data transmission path of the remote UE after S1406 to S1415. As shown in (b) of FIG. 15, the data transmission path between the remote UE and the UPF is a direct path and a direct path.

FIG. 16 is a schematic diagram of a data transmission method 1600 provided by an embodiment of the present application. The method 1600 may be regarded as a specific implementation manner of the method 500, and the method 1600 may include the following steps.

S1601 to S1612 may refer to S1401 to S1412.

S1613, gNB1 determines the base station for relaying UE1.

S1614, gNB1 sends an addition request message #3 to gNB2.

The add request message #3 is used to request to add a data channel.

The adding request message #3 includes the uplink tunnel address of the UPF, the information of the remote UE, the QoS configuration information #5, the identifier of the relay UE and the QFI of the QoS flow #5. Wherein, the information of the remote UE includes an identifier of the remote UE, capability information of the remote UE, security-related information of the remote UE, subscription information, and the like.

S1615, gNB2 sends an addition response message #3 to gNB1.

The addition response message #3 includes the downlink tunnel address of gNB2, resource configuration information #9 (another example of sixth resource configuration information) and resource configuration information #17 (an example of third resource configuration information).

Specifically, gNB2 determines resource configuration information #9 according to QoS configuration information #5, and the resource configuration information #9 is used to configure the Uu interface between relay UE1 and gNB2 (including the Uu-RLC layer of relay UE1, Uu-MAC layer, Uu-PHY layer), and the air interface resources of the PC5 interface between the remote UE and the relay UE1 (including the PC5-RLC layer, PC5-MAC layer, and PC5-PHY layer of the relay UE1).

In addition, gNB2 can also determine resource configuration information #17 (an example of the third resource configuration information) according to QoS configuration information #5 and remote UE information, and the resource configuration information #17 is used to configure the remote UE and gNB2 The air interface resources of the Uu interface (including the Uu-PDCP layer of the remote UE), and the PC5 interface between the remote UE and the relay UE1 (including the PC5-RLC layer, PC5-MAC layer, and PC5-PHY layer of the remote UE ) air interface resource.

S1616, gNB1 sends the resource configuration information #17, resource configuration information #8 and response message #5 to the remote UE.

gNB1 can send an RRC configuration message to the remote UE, and the RRC configuration message includes resource configuration information #17 and N1 SM container.

S1617, gNB2 sends the resource configuration information #9 to the relay UE1.

For example, gNB2 sends the resource configuration information #9 to relay UE1 through an RRC configuration message.

S1618, gNB1 sends the downlink tunnel address information of gNB2 and the QFI of QoS flow #5 to the SMF.

Specifically, gNB1 may send a PDU session resource modify request (PDU session resource modify request) message to the AMF, and the PDU session resource modify request message includes the downlink tunnel address information of gNB2 and the QFI of QoS flow #5.

Further, the AMF may send an N11 message to the SMF, and the N11 message may be a PDU session update context request (Nsmf_PDUsession_updateSMcontext request) message, etc., and the N11 message includes the downlink tunnel address information of gNB2 and the QFI of QoS flow #5.

S1619, the SMF replies to the gNB1 with the updated uplink tunnel address of the UPF.

S1620, gNB1 sends the updated uplink tunnel address of the UPF to gNB2, and gNB2 replies with a response message.

It should be understood that S1618 to S1620 are the process of updating the N3 tunnel for QoS flow #5, wherein the updated N3 tunnel is a tunnel between gNB2 and UPF, and the uplink tunnel address of the N3 tunnel is the uplink tunnel address of the updated UPF, The downlink tunnel address of the N3 tunnel is the downlink tunnel address of gNB2.

After S1601 to S1620, the QoS flow #5 of the direct path of the remote UE is transferred to the non-direct path, and the base station of the direct path is different from the base station of the non-direct path.

It should be understood that alternatives in method 600 apply to method 1600 as well.

Wherein, the UPF is the UPF that provides services for the remote UE, and the AMF is the AMF that provides services for the remote UE. (a) of FIG. 17 is a schematic diagram of the data transmission path of the remote UE after S1601 to S1605. As shown in (a) of FIG. 17 , the data transmission path between the remote UE and the UPF is a direct path. (b) of FIG. 17 is a schematic diagram of the data transmission path of the remote UE after S1606 to S1620. As shown in (b) of FIG. 17, the data transmission path between the remote UE and the UPF is a direct path and a non- direct path.

FIG. 18 is a schematic diagram of a data transmission method 1800 provided by an embodiment of the present application. The method 1800 may be regarded as a specific implementation manner of the method 500, and the method 1800 may include the following steps.

For S1801 to S1805, please refer to S1001 to S1005. The method 1800 is described by taking the establishment of two QoS flows on the indirect path of the remote UE, that is, QoS flow #3 and QoS flow #6 (two examples of the first QoS flow) .

S1806, the remote UE sends a request message #6 to the AMF on the indirect path.

If the remote UE needs to transmit data on the direct path, the remote UE sends a request message #6 (an example of the third request message) to the AMF on the non-direct path.

Specifically, the remote UE sends request message #6 to gNB1, and gNB1 sends request message #6 to AMF.

The request message #6 includes indication information #7 (an example of the third indication information) and the QFI of the QoS flow #6 (an example of the third QoS flow), and the indication information #7 is "transfer (transfer)+direct (direct connection) ) indication", the "transfer (transfer)+direct (direct connection) indication" is used to indicate to transfer the QoS flow #6 to the direct path.

The request message #6 may be a PDU session modification request (PDU session modification request) message, and the request message #6 may include the PDU session ID of the PDU session #1.

The remote UE can send request message #6 through UL NAS message.

S1807. The AMF sends a request message #6 to the SMF.

The AMF may send the request message #6 to the SMF through the N11 message, and the N11 message may be a PDU session update context request (Nsmf_PDUsession_updateSMcontext request) message or the like.

S1808. The SMF determines QoS configuration information #6 according to the request message #6.

The SMF determines QoS configuration information #6 (an example of the third QoS configuration information) according to the request message #6, and the QoS configuration information #6 includes the QoS parameters of the QoS flow #6.

In addition, the path after the transfer of QoS flow #6 is recorded by the SMF as a direct path.

S1809, the SMF sends the indication information #7, the QFI of the QoS flow #6, the QoS configuration information #6 and the response message #6 to the gNB1.

Specifically, the response message #6 is used to respond to the request message #6.

The response message #6 may be a PDU session modification accept (PDU session modification accept) message.

Specifically, the SMF may first send an N11 message to the AMF, the N11 message includes the N1 SM container and the N2 SM container, the N1 SM container includes the response message #6, and the N2 SM container includes the indication information #7 and the QoS flow #6 QFI and QoS configuration information #6, wherein the N11 message may be a PDU session update context response (Nsmf_PDUsession_updateSMcontext response) message.

Further, AMF sends N2 SM container and N1 SM container to gNB1.

S1810, gNB1 sends measurement configuration information #4 to the remote UE according to indication information #7.

The measurement configuration information #4 is used to instruct the remote UE to report the cell on which it can camp.

S1811, the remote UE sends measurement report #4 to gNB1.

Specifically, the remote UE measures the resident cell and the signal strength of the resident cell, and sends a measurement report #4 to gNB1, the measurement report #4 includes the cell identity of the resident cell and the cell signal of the resident cell strength.

S1812, gNB1 determines the base station of the remote UE.

S1813, gNB1 sends resource configuration information #10, resource configuration information #11 and response message #6 to the remote UE.

Specifically, gNB1 determines resource configuration information #10 (an example of the third resource configuration information) according to QoS configuration information #6, and the resource configuration information #10 is used to configure the Uu interface between the remote UE and gNB1 (including the remote UE Uu-PDCP layer, Uu-RLC layer, Uu-MAC layer, Uu-PHY layer) air interface resources.

gNB1 can send an RRC configuration message to the remote UE, and the RRC configuration message includes resource configuration information #10 and N1 SM container.

In addition, gNB1 sends resource configuration information #11 (an example of the third resource configuration information and an example of the fourth resource configuration information) to the remote UE according to the indication information #7 and the QFI of the QoS flow #6. The resource configuration information #11 It is used to configure the remote UE to delete the air interface resource of QoS flow #6 on the indirect path.

After S1801 to S1813, the QoS flow #6 of the non-direct path of the remote UE is transferred to the direct path, and the base station of the direct path is the same as the base station of the non-direct path.

It should be understood that alternatives in method 1000 apply to method 1800 as well.

Wherein, the UPF is the UPF that provides services for the remote UE, and the AMF is the AMF that provides services for the remote UE. (a) of FIG. 19 is a schematic diagram of the data transmission path of the remote UE after S1801 to S1805. As shown in (a) of FIG. 19 , the data transmission path between the remote UE and the UPF is an indirect path. (b) of FIG. 19 is a schematic diagram of the data transmission path of the remote UE after S1806 to S1813. As shown in (b) of FIG. 19, the data transmission path between the remote UE and the UPF is an indirect path and direct path.

FIG. 20 is a schematic diagram of a data transmission method 2000 provided by an embodiment of the present application. The method 2000 may be regarded as a specific implementation manner of the method 500, and the method 2000 may include the following steps.

S2001 to S2011 may refer to S1801 to S1811.

S2012, gNB1 determines the base station of the remote UE.

S2013, gNB1 sends an addition request message #4 to gNB2.

The add request message #4 is used to request to add a data channel.

The adding request message #4 includes the uplink tunnel address of the UPF, the information of the remote UE, the QoS configuration information #6 and the QFI of the QoS flow #6. Wherein, the information of the remote UE includes security-related information and subscription information of the remote UE.

S2014, gNB2 sends an addition response message #4 to gNB1.

The addition response message #6 includes the downlink tunnel address of gNB2 and resource configuration information #12 (another example of the third resource configuration information).

Specifically, gNB2 determines resource configuration information #12 according to QoS configuration information #6, and the resource configuration information #12 is used to configure the Uu interface between the remote UE and gNB2 (including the Uu-PDCP layer of the remote UE, Uu-RLC layer, Uu-MAC layer, Uu-PHY layer) air interface resources.

S2015, gNB1 sends the resource configuration information #12, resource configuration information #11 and response message #6 to the remote UE.

gNB1 can send an RRC configuration message to the remote UE, and the RRC configuration message includes resource configuration information #12 and N1 SM container.

S2016, gNB1 sends the downlink tunnel address information of gNB2 and the QFI of QoS flow #6 to the SMF.

Specifically, gNB1 may send a PDU session resource modify request (PDU session resource modify request) message to the AMF, and the PDU session resource modify request message includes the downlink tunnel address information of gNB2 and the QFI of QoS flow #6.

Further, the AMF may send an N11 message to the SMF, and the N11 message may be a PDU session update context request (Nsmf_PDUsession_updateSMcontext request) message, etc., and the N11 message includes the downlink tunnel address information of gNB2 and the QFI of QoS flow #6.

S2017, the SMF replies to the gNB1 with the updated uplink tunnel address of the UPF.

S2018, gNB1 sends the updated uplink tunnel address of the UPF to gNB2, and gNB2 replies with a response message.

It should be understood that S2016 to S2018 are the process of updating the N3 tunnel for QoS flow #6, wherein the updated N3 tunnel is a tunnel between gNB2 and UPF, and the uplink tunnel address of the N3 tunnel is the uplink tunnel address of the updated UPF, The downlink tunnel address of the N3 tunnel is the downlink tunnel address of gNB2.

After S2001 to S2018, the QoS flow #6 of the non-direct path of the remote UE is transferred to the direct path, and the base station of the direct path is different from the base station of the non-direct path.

It should be understood that alternatives in method 1000 apply to method 2000 as well.

Wherein, the UPF is the UPF that provides services for the remote UE, and the AMF is the AMF that provides services for the remote UE. (a) of FIG. 21 is a schematic diagram of the data transmission path of the remote UE after S2001 to S2005. As shown in (a) of FIG. 21 , the data transmission path between the remote UE and the UPF is an indirect path. (b) of FIG. 21 is a schematic diagram of the data transmission path of the remote UE after S2006 to S2018. As shown in (b) of FIG. 21, the data transmission path between the remote UE and the UPF is an indirect path and direct path.

The device 2200 includes a transceiver unit 2210, which can be used to implement corresponding communication functions, and the transceiver unit 2210 can also be called a communication interface or a communication unit

Optionally, the apparatus 2200 may further include a processing unit 2220, and the processing unit 2220 may be used for data processing.

Optionally, the device 2200 further includes a storage unit, which can be used to store instructions and/or data, and the processing unit 2220 can read the instructions and/or data in the storage unit, so that the device implements the foregoing method embodiments Actions of different devices in the network, for example, actions of the terminal device, the first access network device, the second access network device, the access and mobility management function device, or the first session management function device.

As a design, the apparatus 2200 is configured to perform the actions performed by the terminal device in each method embodiment above.

Specifically, the transceiver unit 2210 is configured to send a first request message to the network device, where the first request message includes first indication information, and the first indication information is used to indicate to establish the first communication path on the first communication path or the second communication path. QoS flow, the first QoS flow is used to transmit the data of the device; the transceiver unit 2210 is also used to: receive first resource configuration information, the first resource configuration information is used to configure the access network resources of the first QoS flow, wherein , the first communication path is a direct connection path, and the second communication path is a non-direct connection path; or, the first communication path is a non-direct connection path, and the second communication path is a direct connection path.

Optionally, the first indication information is used to indicate the establishment of the first QoS flow on the first communication path, and the transceiver unit 2210 is further configured to: send a second request message to the network device through the first communication path, the second request message Including second indication information, the second indication information is used to indicate the establishment of a second QoS flow on the second communication path, and the second QoS flow is used to transmit data of the device; the transceiver unit 2210 is also used to: receive second resource configuration information , the second resource configuration information is used to configure access network resources of the second QoS flow.

Optionally, the first indication information is used to indicate the establishment of the first QoS flow on the first communication path, and the transceiver unit 2210 is further configured to: send a third request message to the network device through the first communication path, the third request message including third indication information and QoS flow identification information of a third QoS flow, where the third indication information is used to indicate that the third QoS flow is transferred to the second communication path, and the third QoS flow is at least one of the first QoS flows ; The transceiving unit 2210 is also configured to: receive third resource configuration information, where the third resource configuration information is used to configure the access network resources of the third QoS flow.

Optionally, the third resource configuration information is specifically used to: allocate the access network resources of the third QoS flow on the second communication path; delete the access network resources of the third QoS flow on the first communication path.

Optionally, the third resource configuration information is specifically used to allocate access network resources of the third QoS flow on the second communication path, and the transceiver unit 2210 is further configured to: receive fourth configuration information, the fourth configuration information is used for Deleting the access network resources of the third QoS flow on the first communication path.

Optionally, the first request message further includes fourth indication information, where the fourth indication information is used to indicate the session management function device that supports multipath.

Optionally, the first communication path is a path through which the device is directly connected to the first access network device, the first indication information is used to indicate the establishment of a first QoS flow on the first communication path, and the first resource configuration information includes the Configuration information of the Uu interface between the device and the first access network device.

Optionally, the first communication path is a path through which the device is directly connected to the first access network device, the first indication information is used to indicate the establishment of the first QoS flow on the second communication path, and the transceiver unit 2210 is also used to: send The cell identifier of the first relay terminal device, the cell identifier of the first relay terminal device is used to determine the access network device of the first relay terminal device, and the devices of the second communication path include the first relay terminal device.

Optionally, the transceiving unit 2210 is specifically configured to: send a first measurement report to the first access network device, where the first measurement report includes the cell identity of at least one relay terminal device and the proximity based service of at least one relay terminal device Communication PC5 signal strength, the at least one relay terminal device includes the first relay terminal device, the PC5 signal strength of the at least one relay terminal device is used to determine the first relay terminal device; or, to the first access network device Sending a radio resource control RRC message, where the RRC message includes the cell identity of the first relay terminal device; or, the first request message includes the cell identity of the first relay terminal device.

Optionally, the access network device of the first relay terminal device is the first access network device, the second communication path is a path for the device to connect to the first access network device through the first relay terminal device, and the first The resource configuration information includes configuration information of the PC5 interface between the device and the first relay terminal device, and configuration information of the Uu interface between the terminal device and the first access network device.

Optionally, the access network device of the first relay terminal device is a second access network device, the second communication path is a path for the device to connect to the second access network device through the first relay terminal device, and the first The resource configuration information includes configuration information of the PC5 interface between the device and the first relay terminal device, and configuration information of the Uu interface between the terminal device and the second access network device.

Optionally, the first communication path is a path through which the apparatus connects to the first access network device through the first relay terminal device, and the first indication information is used to indicate the establishment of the first QoS flow on the first communication path, and the first The resource configuration information includes configuration information of the PC5 interface between the device and the first relay terminal device, and configuration information of the Uu interface between the terminal device and the first access network device.

Optionally, the first communication path is a path through which the device connects to the first access network device through the first relay terminal device, and the first indication information is used to indicate the establishment of the first QoS flow on the second communication path, and the transceiver unit 2210 is also used to: send a second measurement report to the first access network device, where the second measurement report includes the cell signal strength of the cell where the device can reside, and the cell signal strength is used to determine the access network device of the device .

Optionally, the access network device of the device is the first access network device, the second communication path is a path for the device to directly connect to the first access network device, and the first resource configuration information includes the device and the first access network device. Configuration information of the Uu interface between network-connected devices.

Optionally, the access network device of the device is a second access network device, the second communication path is a path for the device to directly connect to the second access network device, and the first resource configuration information includes the device and the second access network device. Configuration information of the Uu interface between network-connected devices.

The apparatus 2200 can implement the steps or processes corresponding to the execution of the terminal device in the method embodiment according to the embodiment of the present application, and the apparatus 2200 can include a unit for executing the method executed by the terminal device in the embodiment shown in FIG. 5 , Or include units of methods performed by the remote UE in the embodiments shown in FIG. 6 , FIG. 8 , FIG. 10 , FIG. 12 , FIG. 14 , FIG. 16 , FIG. 18 and FIG. 20 .

It should be understood that the specific process of each unit performing the above corresponding steps has been described in detail in the above method embodiments, and for the sake of brevity, details are not repeated here.

As a design, the apparatus 2200 is configured to perform the actions performed by the first access network device in each method embodiment above.

Specifically, the transceiver unit 2210 is configured to receive first indication information and first quality of service QoS configuration information, where the first indication information is used to indicate the establishment of a first QoS flow on the first communication path or the second communication path, and the first The QoS configuration information is used to determine the access network resources of the first QoS flow, and the first QoS flow is used to transmit the data of the terminal device; the transceiver unit 2210 is also used to: send the first resource configuration information to the terminal device through the first communication path , the first resource configuration information is determined according to the first indication information and the first QoS configuration information, and the first resource configuration information is used to configure access network resources of the first QoS flow; wherein, the first communication path is a direct path, The second communication path is a non-direct connection path; or, the first communication path is a non-direct connection path, and the second communication path is a direct connection path.

Optionally, the first indication information is used to indicate the establishment of the first QoS flow on the first communication path, and the transceiver unit 2210 is further configured to: receive second indication information and second QoS configuration information, the second indication information is used to Instructing to establish a second QoS flow on the second communication path, the second QoS configuration information is used to determine the access network resources of the second QoS flow, and the second QoS flow is used to transmit data of the terminal device; the transceiver unit 2210 is also used to : Sending second resource configuration information to the terminal device through the first communication path, the second resource configuration information is determined according to the second indication information and the second QoS configuration information, and the second resource configuration information is used to configure the connection of the second QoS flow access to resources.

Optionally, the first indication information is used to indicate the establishment of the first QoS flow on the first communication path, and the transceiver unit 2210 is also configured to: receive the third indication information, the third QoS configuration information, and the QoS flow of the third QoS flow Identification information, the third indication information is used to indicate that the third QoS flow is transferred to the second communication path, the third QoS configuration information is used to determine the access network resources of the first QoS flow, and the third QoS flow is the first QoS flow At least one of the streams; the transceiver unit 2210 is further configured to: send third resource configuration information to the terminal device through the first communication path, the third resource configuration information is determined according to the third indication information and the third QoS configuration information, the first The third resource configuration information is used to configure the access network resources of the third QoS flow.

Optionally, the third resource configuration information is specifically used to: allocate access network resources of the third QoS flow on the second communication path; delete access network resources of the third QoS flow on the first communication path.

Optionally, the third resource configuration information is specifically used to allocate access network resources of the third QoS flow on the second communication path, and the transceiver unit 2210 is also used to: send fourth configuration information, the fourth configuration information is used for Delete the access network resources of the third QoS flow on the first communication path.

Optionally, the first communication path is a path directly connecting the terminal device to the device, the first indication information is used to indicate the establishment of the first QoS flow on the first communication path, and the first resource configuration information includes The configuration information of the Uu interface between them.

Optionally, the first communication path is a path directly connecting the terminal device to the device, and the first indication information is used to indicate the establishment of the first QoS flow on the second communication path, and the device further includes: a processing unit 2220 configured to obtain The cell identifier of the first relay terminal device, the equipment of the second communication path includes the first relay terminal device; and the access network device of the first relay terminal device is determined according to the cell identifier of the first relay terminal device.

Optionally, the processing unit 2220 is specifically configured to: determine the first relay terminal device and the cell identity of the first relay terminal device according to the signal strength of the ProSe communication PC5 of at least one relay terminal device; A radio resource control RRC message, the RRC message includes the cell identity of the first relay terminal device; or, receiving a first message from the first session management function device or access and mobility management function device, the first message includes the first message A cell identifier of the relay terminal equipment.

Optionally, the access network device of the first relay terminal device is the device, the second communication path is a path for the terminal device to connect to the device through the first relay terminal device, and the first resource configuration information includes the terminal device and the second communication path. Relay configuration information of the PC5 interface for ProSe communication between terminal devices, and configuration information of the Uu interface between the terminal device and the device.

Optionally, the processing unit 2220 is configured to: send fifth resource configuration information to the first relay terminal device, where the fifth resource configuration information includes configuration information of the PC5 interface between the terminal device and the first relay terminal device, And the configuration information of the Uu interface between the first relay terminal device and the first access network device.

Optionally, the access network device of the first relay terminal device is a second access network device, the second communication path is a path for the terminal device to connect to the second access network device through the first relay terminal device, and the first The resource configuration information includes configuration information of the PC5 interface between the terminal device and the first relay terminal device, and configuration information of the Uu interface between the terminal device and the second access network device.

Optionally, the transceiving unit 2210 is further configured to: send a second message to the second access network device, where the second message includes the first QoS configuration information; and receive the first resource configuration information from the second access network device.

Optionally, the second access network device is configured to send sixth resource configuration information to the first relay terminal device, where the sixth resource configuration information includes the configuration of the PC5 interface between the terminal device and the first relay terminal device information, and configuration information of the Uu interface between the first relay terminal device and the second access network device.

Optionally, the first communication path is a path for a terminal device to connect to the device through a first relay terminal device, the first indication information is used to indicate the establishment of a first QoS flow on the first communication path, and the first resource configuration information includes terminal Configuration information of the PC5 interface between the device and the first relay terminal device, and configuration information of the Uu interface between the terminal device and the device.

Optionally, the first communication path is a path through which a terminal device connects to the device through a first relay terminal device, and the first indication information is used to instruct the establishment of the first QoS flow on the second communication path, and the device further includes, processing Unit 2220, configured to determine the access network equipment of the terminal device according to the cell signal strength of the cell where the terminal device can reside.

Optionally, the access network device of the terminal device is the device, the second communication path is a path for the terminal device to directly connect to the device, and the first resource configuration information includes configuration information of a Uu interface between the terminal and the device.

Optionally, the access network device of the terminal device is a second access network device, the second communication path is a path for the terminal device to directly connect to the second access network device, and the first resource configuration information includes the terminal device and the second access network device. Configuration information of the Uu interface between network-connected devices.

Optionally, the transceiving unit 2210 is further configured to: send a third message to the second access network device, where the third message includes the first QoS configuration information; and receive the first resource configuration information from the second access network device.

The apparatus 2200 can implement the steps or processes corresponding to the first access network device in the method embodiment according to the embodiment of the present application. The unit of the method executed by the network device, or the unit including the method executed by gNB1 in the embodiments shown in FIG. 6 , FIG. 8 , FIG. 10 , FIG. 12 , FIG. 14 , FIG. 16 , FIG. 18 and FIG.

As a design, the apparatus 2200 is configured to perform the actions performed by the access and mobility management function device in the above method embodiments.

Specifically, the transceiver unit 2210 is configured to receive a first request message, the first request message includes fourth indication information, and the fourth indication information is used to indicate the session management function device that supports multi-path communication; the processing unit 2220 uses Based on determining the first session management function device according to the fourth indication information, the first session management function device supports multipath communication.

Optionally, the device is configured to determine first QoS configuration information, where the first QoS configuration information is used to determine first resource configuration information, where the first resource configuration information is used to configure access network resources of the first QoS flow, the The first QoS flow is used to transmit data of the terminal equipment.

Optionally, the transceiving unit 2210 is further configured to: send the first request message to the first session management function device.

The apparatus 2200 can implement the steps or processes corresponding to the access and mobility management function equipment in the method embodiment according to the embodiment of the present application, and the apparatus 2200 can include a method for performing the access in the embodiment shown in FIG. 5 The unit of the method executed by the mobility management function device, or the unit of the method executed by the AMF in the embodiments shown in FIG. 6 , FIG. 8 , FIG. 10 , FIG. 12 , FIG. 14 , FIG. 16 , FIG.

As a design, the apparatus 2200 is configured to perform the actions performed by the first session management function device in each method embodiment above.

Specifically, the transceiver unit 2210 is configured to receive a first request message, where the first request message includes first indication information, and the first indication information is used to instruct to establish a first quality of service (QoS) on the first communication path or the second communication path ( quality of service (QoS) flow (flow), the first QoS flow is used to transmit the data of the terminal device; the processing unit 2220 is used to generate the first QoS configuration information according to the first request message, and the first QoS configuration information is used to determine First resource configuration information, where the first resource configuration information is used to configure access network resources of the first QoS flow, wherein the first communication path is a direct connection path, and the second communication path is a non-direct connection path; or, the first The communication path is a non-direct connection path, and the second communication path is a direct connection path.

Optionally, the transceiving unit 2210 is further configured to: send the first QoS configuration information to the first access network device.

The apparatus 2200 can implement the steps or processes corresponding to the first session management function device in the method embodiment according to the embodiment of the present application, and the apparatus 2200 can include a method for performing the first session management in the embodiment shown in FIG. The unit of the method executed by the functional device, or the unit of the method executed by the SMF in the embodiments shown in FIG. 6 , FIG. 8 , FIG. 10 , FIG. 12 , FIG. 14 , FIG. 16 , FIG. 18 and FIG.

FIG. 23 shows a schematic diagram of a data transmission apparatus 2300 provided by an embodiment of the present application. The device 2300 includes a processor 2310, the processor 2310 is coupled with a memory 2320, the memory 2320 is used for storing computer programs or instructions and/or data, and the processor 2310 is used for executing the computer programs or instructions stored in the memory 2320, or reading the memory 2320 The stored data is used to execute the methods in the above method embodiments. As shown in FIG. 23 , the device 2300 further includes a transceiver 2330 for receiving and/or sending signals. For example, the processor 2310 is configured to control the transceiver 2330 to receive and/or send signals.

Optionally, there are one or more processors 2310.

Optionally, there are one or more memories 2320.

Optionally, the memory 2320 is integrated with the processor 2310, or is set separately.

As a solution, the apparatus 2300 is used to implement the terminal device, the first access network device, the second access network device, the access and mobility management function device or the first session management function in each method embodiment above. The action performed by the device.

For example, the processor 2310 is configured to execute the computer programs or instructions stored in the memory 2320, so as to implement related operations of the first access network device in the various method embodiments above. For example, the method performed by the first access network device in the embodiment shown in Figure 4, or the implementation shown in any one of Figure 6, Figure 8, Figure 10, Figure 12, Figure 14, Figure 16, Figure 18 and Figure 20 The method executed by gNB1 in the example.

For another example, the processor 2310 is configured to execute computer programs or instructions stored in the memory 2320, so as to implement related operations of the terminal device in the above method embodiments. For example, the method performed by the terminal device in the embodiment shown in Figure 4, or the UE in any of the embodiments shown in Figure 6, Figure 8, Figure 10, Figure 12, Figure 14, Figure 16, Figure 18, and Figure 20 method of execution.

It should be understood that the processor mentioned in the embodiment of the present application may be a central processing unit (central processing unit, CPU), and may also be other general purpose processors, digital signal processors (digital signal processor, DSP), application specific integrated circuits ( application specific integrated circuit (ASIC), off-the-shelf programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor, or the processor may be any conventional processor, or the like.

It should also be understood that the memory mentioned in the embodiments of the present application may be a volatile memory and/or a nonvolatile memory. Among them, the non-volatile memory can be read-only memory (read-only memory, ROM), programmable read-only memory (programmable ROM, PROM), erasable programmable read-only memory (erasable PROM, EPROM), electrically programmable Erases programmable read-only memory (electrically EPROM, EEPROM) or flash memory. The volatile memory may be random access memory (RAM). For example, RAM can be used as an external cache. As an example and not limitation, RAM includes the following multiple forms: static random access memory (static RAM, SRAM), dynamic random access memory (dynamic RAM, DRAM), synchronous dynamic random access memory (synchronous DRAM, SDRAM), Double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection dynamic random access memory (synchlink DRAM, SLDRAM) and direct Memory bus random access memory (direct rambus RAM, DR RAM).

It should be noted that when the processor is a general-purpose processor, DSP, ASIC, FPGA or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components, the memory (storage module) may be integrated in the processor.

It should also be noted that the memories described herein are intended to include, but are not limited to, these and any other suitable types of memories.

The present application also provides a computer-readable medium, on which a computer program is stored, and when the computer program is executed by a computer, the functions of any of the above method embodiments are realized.

The present application also provides a computer program product, which implements the functions of any one of the above method embodiments when executed by a computer.

The present application also provides a system, which includes the aforementioned first access network device, second access network device, access and mobility management functional device, and first session management functional device.

In the above embodiments, all or part of them may be implemented by software, hardware, firmware or any combination thereof. When implemented using software, it may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer instructions are loaded and executed on the computer, the processes or functions according to the embodiments of the present application will be generated in whole or in part. The computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable devices. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website, computer, server or data center Transmission to another website site, computer, server or data center by wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that can be accessed by a computer, or a data storage device such as a server or a data center integrated with one or more available media. The available medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a high-density digital video disc (digital video disc, DVD)), or a semiconductor medium (for example, a solid state disk (solid state disk, SSD)) etc.

In the embodiments of the present application, words such as "exemplary" and "for example" are used as examples, illustrations or descriptions. Any embodiment or design described herein as "example" is not to be construed as preferred or advantageous over other embodiments or designs. Rather, the use of the word example is intended to present concepts in a concrete manner.

It should be understood that references to "an embodiment" throughout this specification mean that a particular feature, structure, or characteristic related to the embodiment is included in at least one embodiment of the present application. Thus, the various embodiments throughout the specification are not necessarily referring to the same embodiment. Furthermore, the particular features, structures or characteristics may be combined in any suitable manner in one or more embodiments.

It should be understood that, in various embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the order of execution, and the execution order of the processes should be determined by their functions and internal logic, and should not be used in the embodiments of the present application. The implementation process constitutes any limitation. The names of all nodes and messages in this application are only the names set by this application for the convenience of description. The names in the actual network may be different. It should not be understood that this application limits the names of various nodes and messages. On the contrary, any with and The names of nodes or messages with the same or similar functions used in this application are regarded as the methods of this application or equivalent replacements, and all are within the protection scope of this application.

It should also be understood that in this application, "when", "if" and "if" all mean that the UE or the base station will make corresponding processing under certain objective circumstances, and it is not a limited time, and the UE is not required to Or the base station must have a judgment action when it is implemented, and it does not mean that there are other restrictions.

It should be noted that in this embodiment of the application, "presetting", "preconfiguring", etc. can be realized by pre-saving corresponding codes, tables or other methods that can be used to indicate related information in the device (for example, terminal device). implementation, the present application does not limit its specific implementation, such as the preset rules and preset constants in the embodiments of the present application.

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

Herein, the term "at least one of" or "at least one of" means all or any combination of the listed items, for example, "at least one of A, B and C", It can be expressed: A exists alone, B exists alone, C exists alone, A and B exist simultaneously, B and C exist simultaneously, and A, B, and C exist simultaneously. "At least one" herein means one or more. "Multiple" means two or more.

It should be understood that in each embodiment of the present application, "B corresponding to A" means that B is associated with A, and B can be determined according to A. However, it should also be understood that determining B according to A does not mean determining B only according to A, and B may also be determined according to A and/or other information. The terms "including", "comprising", "having" and variations thereof mean "including but not limited to", unless specifically stated otherwise.

It should be understood that in various embodiments of the present application, the first, second and various numbers are only for convenience of description and are not used to limit the scope of the embodiments of the present application. For example, to distinguish different information, etc.

Those skilled in the art can appreciate that the units and algorithm steps of the examples described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed by hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the present application.

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

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

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

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

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

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

Claims

A method for data transmission, comprising:

The terminal device sends a first request message to the network device through the first communication path, the first request message includes first indication information, and the first indication information is used to indicate that the first communication path or the second communication path is established A first quality of service QoS flow, where the first QoS flow is used to transmit data of the terminal device;

The terminal device receives first resource configuration information, where the first resource configuration information is used to configure access network resources of the first QoS flow,

Wherein, the first communication path is a direct connection path, and the second communication path is a non-direct connection path; or,

The first communication path is a non-direct connection path, and the second communication path is a direct connection path.
The method according to claim 1, wherein the first indication information is used to indicate establishment of the first QoS flow on the first communication path, and the method further comprises:

The terminal device sends a second request message to the network device through the first communication path, the second request message includes second indication information, and the second indication information is used to indicate that on the second communication path establishing a second QoS flow, where the second QoS flow is used to transmit data of the terminal device;

The terminal device receives second resource configuration information, where the second resource configuration information is used to configure access network resources of the second QoS flow.
The method according to claim 1, wherein the first indication information is used to indicate establishment of the first QoS flow on the first communication path, and the method further comprises:

The terminal device sends a third request message to the network device through the first communication path, the third request message includes third indication information and QoS flow identification information of a third QoS flow, and the third indication information It is used to indicate to transfer the third QoS flow to the second communication path, where the third QoS flow is at least one of the first QoS flows.

The terminal device receives third resource configuration information, where the third resource configuration information is used to configure access network resources of the third QoS flow.
The method according to claim 3, wherein the third resource configuration information is specifically used for:

allocating access network resources of the third QoS flow on the second communication path;

Deleting the access network resources of the third QoS flow on the first communication path.
The method according to claim 3, wherein the third resource configuration information is specifically used to allocate access network resources of the third QoS flow on the second communication path, the method further comprising:

The terminal device receives fourth configuration information, where the fourth configuration information is used to delete the access network resources of the third QoS flow on the first communication path.
The method according to any one of claims 1 to 5, wherein the first request message further includes fourth indication information, and the fourth indication information is used to indicate the session management function device that supports multipath .
The method according to any one of claims 1 to 6, wherein the first communication path is a path through which the terminal device directly connects to the first access network device,

Wherein, the first indication information is used to indicate the establishment of the first QoS flow on the first communication path, and the first resource configuration information includes the information between the terminal device and the first access network device Configuration information of the Uu interface.
The method according to any one of claims 1 to 6, wherein the first communication path is a path through which the terminal device directly connects to the first access network device,

Wherein, the first indication information is used to indicate the establishment of the first QoS flow on the second communication path, and the method further includes:

The terminal device sends the cell identifier of the first relay terminal device, the cell identifier of the first relay terminal device is used to determine the access network device of the first relay terminal device, and the second communication path The device includes the first relay terminal device.
The method according to claim 8, wherein the terminal device sending the cell identity of the first relay terminal device comprises:

The terminal device sends a first measurement report to the first access network device, where the first measurement report includes the cell identity of the at least one relay terminal device and the ProSe communication of the at least one relay terminal device PC5 signal strength, the at least one relay terminal device includes the first relay terminal device, and the PC5 signal strength of the at least one relay terminal device is used to determine the first relay terminal device; or,

The terminal device sends a radio resource control RRC message to the first access network device, where the RRC message includes the cell identifier of the first relay terminal device; or,

The first request message includes the cell identifier of the first relay terminal device.
The method according to claim 8 or 9, wherein the access network device of the first relay terminal device is the first access network device, and the second communication path is that the terminal device passes through a path connecting the first relay terminal device to the first access network device,

Wherein, the first resource configuration information includes the configuration information of the PC5 interface between the terminal device and the first relay terminal device, and the Uu interface between the terminal device and the first access network device. Interface configuration information.
The method according to claim 8 or 9, wherein the access network device of the first relay terminal device is a second access network device, and the second communication path is that the terminal device passes through the first relaying the path for the terminal device to connect to the second access network device,

Wherein, the first resource configuration information includes the configuration information of the PC5 interface between the terminal device and the first relay terminal device, and the Uu interface between the terminal device and the second access network device. Interface configuration information.
The method according to any one of claims 1 to 6, wherein the first communication path is a path for the terminal device to connect to the first access network device through a first relay terminal device,

Wherein, the first indication information is used to indicate the establishment of the first QoS flow on the first communication path, and the first resource configuration information includes the information between the terminal device and the first relay terminal device. Configuration information of the PC5 interface, and configuration information of the Uu interface between the terminal device and the first access network device.
The method according to any one of claims 1 to 6, wherein the first communication path is a path for the terminal device to connect to the first access network device through a first relay terminal device,

Wherein, the first indication information is used to indicate the establishment of the first QoS flow on the second communication path, and the method further includes:

The terminal device sends a second measurement report to the first access network device, the second measurement report includes the cell signal strength of the cell where the terminal device can camp, and the cell signal strength is used to determine the The access network equipment of the terminal equipment.
The method according to claim 13, wherein the access network device of the terminal device is the first access network device, and the second communication path is that the terminal device is directly connected to the first access network device. the path of the network-connected device,

Wherein, the first resource configuration information includes configuration information of a Uu interface between the terminal device and the first access network device.
The method according to claim 13, wherein the access network device of the terminal device is a second access network device, and the second communication path is that the terminal device is directly connected to the second access network the path to the device,

Wherein, the first resource configuration information includes configuration information of a Uu interface between the terminal device and the second access network device.
A method for data transmission, comprising:

The first access network device receives first indication information and first quality of service QoS configuration information, the first indication information is used to indicate the establishment of a first QoS flow on the first communication path or the second communication path, and the first QoS The configuration information is used to determine the access network resources of the first QoS flow, and the first QoS flow is used to transmit data of the terminal device;

The first access network device sends first resource configuration information to the terminal device through a first communication path, the first resource configuration information is determined according to the first indication information and the first QoS configuration information, and the The first resource configuration information is used to configure access network resources of the first QoS flow;

Wherein, the first communication path is a direct connection path, and the second communication path is a non-direct connection path; or,

The first communication path is a non-direct connection path, and the second communication path is a direct connection path.
The method according to claim 16, wherein the first indication information is used to indicate establishment of the first QoS flow on the first communication path, and the method further comprises:

The first access network device receives second indication information and second QoS configuration information, the second indication information is used to indicate the establishment of a second QoS flow on the second communication path, and the second QoS configuration information uses determining access network resources of the second QoS flow, where the second QoS flow is used to transmit data of the terminal device;

The first access network device sends second resource configuration information to the terminal device through the first communication path, and the second resource configuration information is determined according to the second indication information and the second QoS configuration information , the second resource configuration information is used to configure access network resources of the second QoS flow.
The method according to claim 16, wherein the first indication information is used to indicate establishment of the first QoS flow on the first communication path, and the method further comprises:

The first access network device receives third indication information, third QoS configuration information, and QoS flow identification information of a third QoS flow, where the third indication information is used to indicate that the third QoS flow is transferred to the A second communication path, where the third QoS configuration information is used to determine access network resources of the first QoS flow, and the third QoS flow is at least one of the first QoS flows;

The first access network device sends the third resource configuration information to the terminal device through the first communication path, and the third resource configuration information is configured according to the third indication information and the third QoS The information determines that the third resource configuration information is used to configure access network resources of the third QoS flow.
The method according to claim 18, wherein the third resource configuration information is specifically used for:

allocating access network resources of the third QoS flow on the second communication path;

Deleting the access network resources of the third QoS flow on the first communication path.
The method according to claim 18, wherein the third resource configuration information is specifically used to allocate access network resources of the third QoS flow on the second communication path, the method further comprising:

The first access network device sends fourth configuration information, where the fourth configuration information is used to delete the access network resources of the third QoS flow on the first communication path.
The method according to any one of claims 16 to 20, wherein the first communication path is a path through which the terminal device is directly connected to the first access network device,

Wherein, the first indication information is used to indicate the establishment of the first QoS flow on the first communication path, and the first resource configuration information includes the information between the terminal device and the first access network device Configuration information of the Uu interface.
The method according to any one of claims 16 to 20, wherein the first communication path is a path through which the terminal device is directly connected to the first access network device,

Wherein, the first indication information is used to indicate the establishment of the first QoS flow on the second communication path, and the method further includes:

The first access network device acquires the cell identity of the first relay terminal device, and the devices of the second communication path include the first relay terminal device;

The first access network device determines the access network device of the first relay terminal device according to the cell identifier of the first relay terminal device.
The method according to claim 22, wherein the obtaining the cell identity of the first relay terminal device by the first access network device comprises:

The first access network device determines the cell identity of the first relay terminal device and the first relay terminal device according to the ProSe communication PC5 signal strength of at least one relay terminal device; or,

The first access network device receives a radio resource control RRC message from a terminal device, where the RRC message includes the cell identifier of the first relay terminal device; or,

The first access network device receives a first message from a first session management function device or an access and mobility management function device, where the first message includes a cell identifier of the first relay terminal device.
The method according to claim 22 or 23, wherein the access network device of the first relay terminal device is the first access network device, and the second communication path is that the terminal device passes through a path connecting the first relay terminal device to the first access network device,

Wherein, the first resource configuration information includes the configuration information of the ProSe communication PC5 interface between the terminal device and the first relay terminal device, and the configuration information between the terminal device and the first access network device The configuration information of the Uu interface between them.
The method according to claim 24, further comprising:

The first access network device sends fifth resource configuration information to the first relay terminal device, where the fifth resource configuration information includes the PC5 interface between the terminal device and the first relay terminal device configuration information, and configuration information of the Uu interface between the first relay terminal device and the first access network device.
The method according to claim 22 or 23, wherein the access network device of the first relay terminal device is a second access network device, and the second communication path is that the terminal device passes through the first relaying the path for the terminal device to connect to the second access network device,

Wherein, the first resource configuration information includes the configuration information of the PC5 interface between the terminal device and the first relay terminal device, and the Uu interface between the terminal device and the second access network device. Interface configuration information.
The method according to claim 26, further comprising:

The first access network device sends a second message to the second access network device, where the second message includes the first QoS configuration information;

The first access network device receives the first resource configuration information from the second access network device.
The method according to claim 26 or 27, wherein the second access network device is configured to send sixth resource configuration information to the first relay terminal device, and the sixth resource configuration information includes the Configuration information of the PC5 interface between the terminal device and the first relay terminal device, and configuration information of the Uu interface between the first relay terminal device and the second access network device.
The method according to any one of claims 16 to 20, wherein the first communication path is a path for the terminal device to connect to the first access network device through a first relay terminal device,

Wherein, the first indication information is used to indicate the establishment of the first QoS flow on the first communication path, and the first resource configuration information includes the information between the terminal device and the first relay terminal device. Configuration information of the PC5 interface, and configuration information of the Uu interface between the terminal device and the first access network device.
The method according to any one of claims 16 to 20, wherein the first communication path is a path for the terminal device to connect to the first access network device through a first relay terminal device,

Wherein, the first indication information is used to indicate the establishment of the first QoS flow on the second communication path, and the method further includes:

The first access network device determines the access network device of the terminal device according to the cell signal strength of the cell where the terminal device can camp.
The method according to claim 30, wherein the access network device of the terminal device is the first access network device, and the second communication path is that the terminal device is directly connected to the first access network device. the path of the network-connected device,

Wherein, the first resource configuration information includes configuration information of a Uu interface between the terminal device and the first access network device.
The method according to claim 30, wherein the access network device of the terminal device is a second access network device, and the second communication path is that the terminal device is directly connected to the second access network the path to the device,

Wherein, the first resource configuration information includes configuration information of a Uu interface between the terminal device and the second access network device.
The method of claim 32, further comprising:

The first access network device sends a third message to the second access network device, where the third message includes the first QoS configuration information;

The first access network device receives the first resource configuration information from the second access network device.
A method for data transmission, comprising:

The access and mobility management function device receives a first request message, where the first request message includes fourth indication information, and the fourth indication information is used to indicate the session management function device that supports multipath communication;

The access and mobility management function device determines the first session management function device according to the fourth indication information, and the first session management function device supports the multipath communication.
A device for data transmission, characterized by comprising: a unit for performing the method according to any one of claims 1-34.
A device for data transmission, characterized in that it includes:

A processor configured to execute the computer program stored in the memory, so that the device executes the method according to any one of claims 1 to 34.
The apparatus of claim 36, further comprising the memory.
A computer-readable storage medium, characterized in that a computer program is stored on the computer-readable storage medium, and when the computer program runs on a computer, the computer executes any one of claims 1-34. method described in the item.
A computer program product, characterized in that the computer program product comprises instructions for performing the method according to any one of claims 1 to 34.
A data transmission system, characterized by comprising: a first access network device and an access and mobility management function device,

The first access network device is configured to execute the method according to any one of claims 16 to 33;

The access and mobility management functional device is configured to execute the method as claimed in claim 34 .