Triggering migration of a network access agent associated with an access terminal
View Patent ↗A method is provided for triggering migration of call session state information. The method includes determining whether to migrate a network access agent associated with an access terminal in a wireless communication system based on at least one of mobility information associated with the access terminal and status information associated with the wireless communication system.
1. A method, comprising:
determining at an access point of a wireless communication system, prior to an access terminal being re-activated from an idle mode, whether to migrate a network access agent associated with the access terminal from one base station router to another base station router based on status information associated with the wireless communication system, wherein the status information is at least one of relay transport delay, control signaling overhead, call reactivation time, reactivation latency, a policy based timer parameter, a network load parameter, a Quality of Service (QoS) flow parameter, a buffer size in a target network elements, a buffer size in a source network element, and a Grade of Service (GoS) parameter, wherein the network access agent provides at least one of point-of-attachment or care-of-address functionality for the access terminal.
2. A method of claim 1 , wherein determining whether to migrate the network access agent comprises determining whether to migrate the network access agent based on mobility information indicative of at least one of a location of the access terminal, motion of the access terminal, a frequency or rate of mobility of physical layer mobility access, and a rate of crossing Base Station Receiver (BSR) boundaries.
3. The method of claim 1 , wherein determining whether to migrate the network access agent comprises determining to migrate the network access agent in response to determining that the network access agent associated with the access terminal is not on a serving base station for the access terminal.
4. The method of claim 1 , wherein determining whether to migrate the network access agent comprises determining whether to migrate the network access agent before the access terminal enters the idle mode.
5. The method of claim 4 , comprising:
receiving, at a first base station router, a request to enter the idle mode from the access terminal.
6. The method of claim 5 , comprising:
determining whether the network access agent associated with the access terminal is on the first base station router in response to receiving the request to enter the idle mode.
7. The method of claim 6 , comprising:
migrating the network access agent to the first base station router in response to determining that the network access agent associated with the access terminal is not on the first base station router for the access terminal.
8. The method of claim 7 , comprising:
granting the request to enter the idle mode after the network access agent has been migrated to the first base station router.
9. The method of claim 6 , wherein determining whether to migrate the network access agent comprises determining whether to migrate the network access agent based on at least one of a network topology, a registration boundary, a tunnel availability between a last-reported base station router and at least one base station router associated with said at least one location of the access terminal, a data path traversal time, at least one movement characteristic associated with the access terminal, and at least one predetermined movement pattern associated with the access terminal.
10. The method of claim 1 , wherein determining whether to migrate the network access agent comprises determining whether to migrate the network access agent while the access terminal is in the idle mode.
11. The method of claim 10 , wherein determining whether to migrate the network access agent comprises determining whether to migrate the network access agent in response to information indicating at least one location of the access terminal.
12. The method of claim 1 , wherein determining whether to migrate the network access agent comprises determining whether to migrate the network access agent concurrently with re-activating the access terminal from the idle mode.
13. The method of claim 12 , wherein determining whether to migrate the network access agent comprises determining whether to migrate the network access agent in response to information indicating re-activating the access terminal from the idle mode.
14. The method of claim 1 , wherein determining whether to migrate the network access agent comprises determining whether to migrate the network access agent based on a reactivation latency associated with the access terminal.
15. The method of claim 1 , wherein determining whether to migrate the network access agent comprises determining whether to migrate the network access agent based on at least one of an availability of a network access agent node, a network or tunneling delay and a mobility characteristic of the access terminal.
16. The method of claim 1 , comprising registering the access terminal with a home agent in response to determining to migrate the network access agent.
17. The method of claim 1 , wherein determining whether to migrate the network access agent comprises determining whether to migrate the network access agent based on information associated with at least one of a Voice over Internet Protocol application, a video streaming application, an audio streaming application, and a Push-to-talk application.
18. The method of claim 1 , wherein determining whether to migrate the network access agent comprises forcing migration of the network access agent based on the status information associated with the wireless communication system.
19. The method of claim 1 , comprising migrating the network access agent.