Mobile handover method and related device
The embodiments of the application disclose a mobile handover method. The method includes: a first network device receives first information, and learns that a first terminal device is handed over to a target access network device. The first network device sends second information to a second network device, and the second network device determines, based on the second information, whether to reselect a target user plane function device for the first terminal device; and/or the first network device sends third information to a third network device, and the third network device determines, based on the third information, whether to reselect a target application server for the first terminal device. If the target user plane function device and/or the target application server need/needs to be reselected, a user plane function device and/or an application server need/needs to be handed over in a timely manner.
1. A method comprising:
receiving, by a first core network device, an indication indicating that a terminal device is to be handed over to a target access network device, the indication being sent by a source access network in a handover preparation phase;
sending, by the first core network device to a second core network device, the indication indicating that the terminal device is to be handed over to the target access network device;
receiving, by the second core network device from the first core network device, the indication;
receiving, by the second core network device from a first application server, application server information corresponding to the target access network device; and
reselecting, by the second core network device based on the indication and the application server information, a target user plane function device for serving the terminal device.
2. The method according to claim 1 , wherein the application server information comprises a data network access identifier.
3. The method according to claim 1 , wherein the second core network device is a session management function device.
4. The method according to claim 1 , wherein the first core network device is a network exposure function device.
5. The method according to claim 1 , wherein the target user plane function device provides a user plane service for the terminal device.
6. The method according to claim 1 , wherein the target user plane function device provides data packet routing, filtering, and forwarding for the terminal device.
7. A system comprising:
a first core network device, configured to:
receive an indication indicating that a terminal device is to be handed over to a target access network device, the indication being sent by a source access network in a handover preparation phase, and
send the indication to a second core network device, wherein the indication indicates that the terminal device is to be handed over to the target access network device; and
the second core network device, configured to:
receive, from a first application server, application server information corresponding to the target access network device, and
reselect, based on the indication and the application server information, a target user plane function device for serving the terminal device.
8. The system according to claim 7 , wherein the application server information comprises a data network access identifier.
9. The system according to claim 7 , wherein the second core network device is a session management function device.
10. The system according to claim 7 , wherein the first core network device is a network exposure function device.
11. The system according to claim 7 , wherein the target user plane function device provides a user plane service for the terminal device.
12. The system according to claim 7 , wherein the target user plane function device provides data packet routing, filtering, and forwarding for the terminal device.
13. An apparatus comprising:
a memory, configured to store an instruction; and
at least one processor, configured to invoke the instruction from the memory and run the instruction to cause the apparatus to:
receive an indication indicating that a terminal device is to be handed over to a target access network device, the indication being sent by a source access network in a handover preparation phase;
receive, from a core network device, the indication indicating that the terminal device is to be handed over to the target access network device;
receive, from a first application server, application server information corresponding to the target access network device; and
reselect, based on the indication and the application server information, a target user plane function device for serving the terminal device.
14. The apparatus according to claim 13 , wherein the application server information comprises a data network access identifier.
15. The apparatus according to claim 13 , wherein the apparatus is a session management function device.
16. The apparatus according to claim 13 , wherein the core network device is a network exposure function device.
17. The apparatus according to claim 13 , wherein the target user plane function device provides a user plane service for the terminal device.