Method for service switching between terminal devices

1 . A method of service switching between terminal devices, comprising:

transmitting, by a first terminal device, a service switching request message to a second terminal device, wherein the service switching request message is configured to request the second terminal device to activate at least one session or service specified by the first terminal device, and comprises identifier information of the at least one session or service;

wherein before the transmitting, by the first terminal device, the service switching request message to the second terminal device, the method further comprises:

receiving, by the first terminal device, search configuration information from a network device, and the search configuration information being configured to assist the first terminal device to search for the second terminal device; and

establishing, by the first terminal device, a communication link between the first terminal device and the second terminal device.

2 . The method according to claim 1 , wherein the service switching request message further comprises a serving-temporary mobile subscriber identifier (S-TMSI) and/or a cell radio network temporary identifier (C-RNTI) of the first terminal device.

3 . The method according to claim 1 , further comprising:

triggering the first terminal device to transmit the service switching request message to the second terminal device in response to detecting a preset event.

4 . The method according to claim 3 , wherein the preset event comprises at least one of:

the first terminal device receiving a first request message from an upper layer, the upper layer being a Non-access stratum (NAS) or an application layer, and the first request message being configured to instruct the first terminal device to perform a service switching process;

the first terminal device occurring a wireless link failure;

the first terminal device occurring the wireless link failure and a rebuilding failure;

times of the first terminal device occurring the wireless link failure within a time window Tl exceeding a first threshold;

an interval between two consecutive times of the first terminal device occurring the wireless link failure being less than or equal to a second threshold;

a service-cell measurement result of the first terminal device being less than or equal to a third threshold value;

the service-cell measurement result of the first terminal device being less than or equal to a fourth threshold value and lasting for a first duration;

the first terminal device being in a state of camping on any cell or in a state of any cell selection;

a quality of service (QoS) measurement result of the first terminal device failing to satisfy a QoS requirement;

the QoS measurement result of the first terminal device failing to satisfy the QoS requirement and lasting for a second duration;

a timer T 2 of the first terminal device expiring;

the first terminal device searching for at least one terminal device available to perform the service switching process;

the first terminal device receiving a second request message from the network device, and the second request message being configured to instruct the first terminal device to perform the service switching process; or

the first terminal device receiving a third request message from the second terminal device, and the third request message being configured to instruct the first terminal device to perform the service switching process.

5 . The method according to claim 4 , wherein the preset event comprises the timer T 2 of the first terminal device expiring, and the method further comprises:

turning on, by the first terminal device, the timer T 2 according to a turn-on condition, and the turn-on condition comprising that the QoS measurement result of the first terminal device fails to satisfy the QoS requirement; and

stopping, by the first terminal device, the timer T 2 according to a stopping condition, and the stopping condition comprising that the QoS measurement result of the first terminal device satisfies the QoS requirement during operating of the timer T 2 .

6 . The method according to claim 1 , wherein the search configuration information comprises at least one of:

synchronization signal information of the second terminal device, position information of the second terminal device, or identifier information of the second terminal device.

7 . The method according to claim 1 , wherein after the transmitting, by the first terminal device, the service switching request message to the second terminal device, the method further comprises:

receiving, by the first terminal device, a first response message from the second terminal device, and the first response message being configured to indicate that the session or service identified by all the identifier information in the service switching request message is fully accepted, or the first response message being configured to indicate that the session or service identified by all the identifier information in the service switching request message is fully rejected.

8 . The method according to claim 1 , wherein after the transmitting, by the first terminal device, the service switching request message to the second terminal device, the method further comprises:

receiving, by the first terminal device, a second response message from the second terminal device, and the second response message being configured to indicate that identifier information of at least one session or service which is accepted in the service switching request message, and/or the second response message being configured to indicate identifier information of at least one session or service which is rejected in the service switching request message.

9 . The method according to claim 8 , wherein the second response message further comprises rejected reason information and/or rejected time limit information of the at least one session or service which is rejected.

10 . The method according to claim 1 , wherein before the transmitting, by the first terminal device, the service switching request message to the second terminal device, the method further comprises: receiving, by the first terminal device, instruction information from the network device, and the instruction information being configured to instruct that the service switching request message is determined to be transmitted to the second terminal device.

11 . The method according to claim 1 , wherein before the transmitting, by the first terminal device, the service switching request message to the second terminal device, the method further comprises: determining, by the first terminal device, to transmit the service switching request message to the second terminal device based on capability information of the first terminal device, and the capability information being configured to instruct that the service switching request message is determined to be transmitted to the second terminal device.

12 . A method of service switching between terminal devices, comprising:

receiving, by a network device, a service request message from a second terminal device, wherein the service request message comprises identifier information of an accepted session or an accepted service in a service switching request message, the service switching request message is transmitted by a first terminal device to the second terminal device and configured to request by the first terminal device, the second terminal device to activate at least one session or service specified by the first terminal device, and the service switching request message comprises identifier information of the at least one session or service;

wherein before the receiving, by the network device, the service request message from the second terminal device, the method further comprises:

transmitting, by the network device, search configuration information to the first terminal device, and the search configuration information being configured to assist the first terminal device to search for the second terminal device.

13 . The method according to claim 12 , wherein before the receiving, by the network device, the service request message from the second terminal device, the method further comprises: transmitting, by the network device, a second request message to the first terminal device, and the second request message being configured to instruct the first terminal device to perform a service switching process.

14 . A first terminal device, wherein the first terminal device comprises a processor and a memory, and the processor is configured to call and run a computer program or instructions stored in the memory to enable the first terminal device to perform:

transmitting a service switching request message to a second terminal device, wherein the service switching request message is configured to request the second terminal device to activate at least one session or service specified by the first terminal device, and comprises identifier information of the at least one session or service;

wherein before the transmitting the service switching request message to the second terminal device, the processor is configured to call and run the computer program or the instructions stored in the memory, to enable the first terminal device further to perform:

receiving search configuration information from a network device, and the search configuration information being configured to assist the first terminal device to search for the second terminal device; and

establishing a communication link between the first terminal device and the second terminal device.

15 . The first terminal device according to claim 14 , wherein the service switching request message further comprises a serving-temporary mobile subscriber identifier (S-TMSI) and/or a cell radio network temporary identifier (C-RNTI) of the first terminal device.

16 . The first terminal device according to claim 14 , wherein the search configuration information comprises at least one of:

synchronization signal information of the second terminal device, position information of the second terminal device, or identifier information of the second terminal device.

17 . The first terminal device according to claim 14 , wherein after the transmitting the service switching request message to the second terminal device, the processor is configured to call and run the computer program or the instructions stored in the memory, to enable the first terminal device further to perform:

receiving a first response message from the second terminal device, and the first response message being configured to indicate that the session or service identified by all the identifier information in the service switching request message is fully accepted, or the first response message being configured to indicate that the session or service identified by all the identifier information in the service switching request message is fully rejected.

18 . The first terminal device according to claim 14 , wherein after the transmitting the service switching request message to the second terminal device, the processor is configured to call and run the computer program or the instructions stored in the memory, to enable the first terminal device further to perform:

receiving a second response message from the second terminal device, and the second response message being configured to indicate that identifier information of at least one session or service which is accepted in the service switching request message, and/or the second response message being configured to indicate identifier information of at least one session or service which is rejected in the service switching request message.

19 . The first terminal device according to claim 14 , wherein before the transmitting the service switching request message to the second terminal device, the processor is configured to call and run the computer program or the instructions stored in the memory, to enable the first terminal device further to perform:

receiving instruction information from the network device, and the instruction information being configured to instruct that the service switching request message is determined to be transmitted to the second terminal device.

20 . The first terminal device according to claim 14 , wherein before the transmitting the service switching request message to the second terminal device, the processor is configured to call and run the computer program or the instructions stored in the memory, to enable the first terminal device further to perform:

determining to transmit the service switching request message to the second terminal device based on capability information of the first terminal device, and the capability information being configured to instruct that the service switching request message is determined to be transmitted to the second terminal device.