Method for improving service reliability, device, and system

1. A method for improving service reliability in a communications network, wherein the method comprises:

transmitting, by a first access device, service data along a first transmission path between a terminal and a user plane function entity, wherein the first transmission path passes through the first access device;

receiving, by the first access device, a message from a session function entity, wherein the message comprises a first identifier of the first transmission path, a second identifier of a second transmission path, and an association identifier, and wherein the association identifier indicates to transmit same service data on the first transmission path and the second transmission path; and

initiating, by the first access device, establishment of the second transmission path through a second access device responsive to receiving the message.

2. The method of claim 1 , wherein initiating the establishment of the second transmission path comprises initiating, by the first access device, a secondary base station addition process to establish the second transmission path on the second access device.

3. The method of claim 2 , wherein the second transmission path is for a second quality of service (QoS) flow, and wherein initiating the secondary base station addition process comprises:

sending, by the first access device, a QoS flow establishment request message to the second access device, wherein the QoS flow establishment request message instructs the second access device to establish the second transmission path; and

receiving, by the first access device in response to the QoS flow establishment request message, allocated radio resource information for the second QoS flow from the second access device.

4. The method of claim 1 , wherein the first access device is a 3rd Generation Partnership Project (3GPP) access device and the second access device is a non-3GPP access device, or wherein the first access device is the non-3GPP access device and the second access device is the 3GPP access device.

5. A first access device in a communications network, wherein the first access device comprises:

a processor; and

a memory configured to store computer-executable instructions, wherein the computer-executable instructions, when executed by the processor causes the processor to:

transmit service data along a first transmission path between a terminal and a user plane function entity, wherein the first transmission path passes through the first access device;

receive a message from a session function entity, wherein the message comprises a first identifier of the first transmission path, a second identifier of a second transmission path, and an association identifier, and wherein the association identifier indicates to transmit same service data on the first transmission path and the second transmission path; and

initiate establishment of the second transmission path through a second access device responsive to receiving the message.

6. The first access device of claim 5 , wherein the computer-executable instructions further cause the processor to initiate a secondary base station addition process to establish the second transmission path on the second access device.

7. The first access device of claim 5 , wherein the first access device is a 3rd Generation Partnership Project (3GPP) access device and the second access device is a non-3GPP access device, or wherein the first access device is the non-3GPP access device and the second access device is the 3GPP access device.

8. The first access device of claim 6 , wherein the second transmission path is a second quality of service (QoS) flow, and wherein the computer-executable instructions further cause the processor to:

send a QoS flow establishment request message to the second access device; and

receive, in response to the QoS flow establishment request message, allocated radio resource information for the second QoS flow from the second access device.

9. A system comprising:

a first transmission path for transmitting service data between a terminal and a user plane function entity;

a session function entity configured to send a message in response to determining that a second transmission path needs to be established; and

a first access device along the first transmission path and configured to:

receive the message from the session function entity, wherein the message comprise a first identifier of the first transmission path, a second identifier of the second transmission path, and an association identifier, and wherein the association identifier indicates to transmit same service data on the first transmission path and the second transmission path; and

initiate establishment of the second transmission path through a second access device in response to receiving the message.

10. The system of claim 9 , further comprising the second access device, wherein the first access device is further configured to initiate a secondary base station addition process to instruct the second access device to establish the second transmission path on the second access device.

11. The system of claim 10 , wherein the second transmission path is for a second quality of service (QoS) flow and the first transmission path is for a first QoS flow, wherein the first access device is further configured to:

receive a first QoS flow establishment request message for the first QoS flow, wherein the first QoS flow establishment request includes at least a QoS rule;

map the QoS rule to a radio QoS rule;

send radio configuration to the terminal to complete establishment of the first QoS flow;

instruct the terminal to enable a dual transmission function;

send a second QoS flow establishment request message to the second access device; and

receive, in response to the second QoS flow establishment request message, allocated radio resource information for the second QoS flow from the second access device,

wherein the second access device is further configured to:

receive the second QoS flow establishment request message from the first access device; and

send, in response to the second QoS flow establishment request message, the allocated radio resource information to the first access device, and

wherein the session function entity is further configured such that after the first transmission path and the second transmission path are established, the session function entity instructs, based on a network status of the system or a service requirement of the terminal, the user plane function entity and/or the terminal to start to transmit same service data on the first transmission path and the second transmission path.

12. The system of claim 9 , wherein the first access device is a 3rd Generation Partnership Project (3GPP) access device and the second access device is a non-3GPP access device, or wherein the first access device is the non-3GPP access device and the second access device is the 3GPP access device.

13. The system of claim 9 , wherein the session function entity is further configured to determine that the second transmission path needs to be established in response to the session function entity receiving a secondary path establishment request directly from the terminal.

14. A method for improving service reliability in a communications network, wherein the method comprises:

transmitting, by a first access device, service data along a first transmission path between a terminal and a user plane function entity, wherein the first transmission path passes through the first access device;

sending, by a session function entity, a message in response to determining that a second transmission path needs to be established;

receiving, by the first access device, the message from the session function entity, wherein the message comprises a first identifier of the first transmission path, a second identifier of the second transmission path, and an association identifier, and wherein the association identifier indicates to transmit same service data on the first transmission path and the second transmission path; and

initiation, by the first access device, establishment of the second transmission path through a second access device responsive to receiving the message.

15. The method of claim 14 , wherein initiation the establishment of the second transmission path comprises initiating, by the first access device, a secondary base station addition process to establish the second transmission path on the second access device.

16. The method of claim 14 , wherein the first access device is a 3rd Generation Partnership Project (3GPP) access device and the second access device is a non-3GPP access device, or wherein the first access device is the non-3GPP access device and the second access device is the 3GPP access device.