Load migration method, apparatus, and system
Embodiments of the present disclosure relate to the communications field, and provide a load migration method, apparatus, and system. The method includes: determining, by a source controller, a to-be-migrated UE that needs to be migrated to a destination controller; updating, by the source controller, resource information of the to-be-migrated UE in a database server, where the updated resource information includes a correspondence between the to-be-migrated UE and the destination controller; and sending, by the source controller, an inter-domain update instruction to an external network element, where the inter-domain update instruction includes an identifier of the to-be-migrated UE and an identifier of the destination controller.
1. A method for migrating a user equipment (UE) to a first controller from a second controller, comprising:
obtaining, by a database server, a first temporary user identifier of the UE, the first temporary user identifier comprising an identifier of the second controller;
obtaining, by the first controller, the first temporary user identifier of the UE;
allocating, by the first controller, a second temporary user identifier to the UE, the second temporary user identifier comprising an identifier of the first controller;
transmitting, by the first controller, the second temporary user identifier to the database server:
replacing, by the database server, the first temporary user identifier by the second temporary user identifier, the database server being connected to both the first controller and the second controller; and
sending, by the first controller to an external network element, the identifier of the first controller.
2. The method according to claim 1 , further comprising:
receiving, by the external network element, the identifier of the first controller.
3. The method according to claim 1 , wherein replacing the first temporary user identifier comprises:
searching, by the database server, context data of the UE based on the first temporary user identifier of the UE; and
replacing, by the database server, the first temporary user identifier by the second temporary user identifier in the context data.
4. The method according to claim 1 , wherein obtaining the first temporary user identifier comprises:
receiving, by the first controller, a request from a migration scheduler, the request comprising the first temporary user identifier of the UE.
5. The method according to claim 4 , wherein the migration scheduler is integrated in a base station.
6. The method according to claim 1 , further comprising:
determining, by a migration scheduler, the first controller; and
informing, by the migration scheduler, the first controller of the first temporary user identifier of the UE.
7. The method according to claim 6 , wherein the migration scheduler is integrated in a base station.
8. The method according to claim 1 , wherein the first controller and the second controller are located in two different control domains.
9. A system for migrating a user equipment (UE) to a first controller from a second controller comprising:
a database server connected to the first controller and the second controller, configured to:
obtain a first temporary user identifier of the UE, the first temporary user identifier comprising an identifier of the second controller; and
replace the first temporary user identifier by a second temporary user identifier; and
the first controller, configured to:
obtain the first temporary user identifier of the UE;
allocate the second temporary user identifier to the UE, the second temporary user identifier comprising an identifier of the first controller;
transmit the second temporary user identifier to the database server; and
send, to an external network element, the identifier of the first controller.
10. The system according to claim 9 , further comprising:
the external network element, configured to receive the identifier of the first controller.
11. The system according to claim 9 , wherein the database server is further configured to search context data of the UE based on the first temporary user identifier of the UE; and replace the first temporary user identifier by the second temporary user identifier in the context data.
12. The system according to claim 9 , wherein the first controller is configured to receive a request from a migration scheduler, the request comprising the first temporary user identifier of the UE.
13. The system according to claim 12 , wherein the migration scheduler is integrated in a base station.
14. The system according to claim 9 , further comprising:
a migration scheduler, configured to determine the first controller; and inform the first controller of the first temporary user identifier of the UE.
15. The system according to claim 14 , wherein the migration scheduler is integrated in a base station.
16. The system according to claim 9 , wherein the first controller and the second controller are located in two different control domains.