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 involving an access terminal that is served by a first base station router in a distributed wireless communication system, comprising:
determining, prior to the access terminal being re-activated from an idle mode, whether to migrate a network access agent based on a reactivation latency associated with the access terminal and status information associated with the wireless communication system.
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 information indicative of at least one of a relay transport delay, control signaling overhead, a call reactivation time, a location of the access terminal, motion of the access terminal, a frequency or rate of mobility of physical layer mobility access, and a policy based timer.
3. The method of claim 1 , wherein determining whether to migrate the network access agent comprises determining to migrate 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 serving base station for the access terminal.
4. A method of claim 1 , comprising receiving, at the first base station router, a request to enter the idle mode from the access terminal.
5. The method of claim 4 , 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.
6. The method of claim 5 , comprising migrating the network access agent from a second base station router to the first base station in response to determining that the network access agent associated with the access terminal is not on the first base station.
7. The method of claim 6 , comprising granting the request to enter the idle mode substantially after the network access agent has been migrated to the first base station.
8. 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.
9. The method of claim 8 , 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.
10. The method of claim 9 , 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.
11. 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 activating the idle access terminal.
12. The method of claim 11 , wherein determining whether to migrate the network access agent comprises determining whether to migrate the network access agent in response to information indicating reactivation of the idle access terminal.
13. 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, one or more network load parameters, a mobility characteristic of the access terminal, a quality of service type associated with the application, and a grade of service associated with the application.
14. The method of claim 13 , comprising registering the access terminal with a home agent in response to determining to migrate the network access agent.
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 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.
16. 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.
17. The method of claim 1 , comprising migrating the network access agent.