System and method for handling simple IP to mobile IP transition

摘要

Methods are provided for transitioning between SIP and MIP. Mobile devices, upon detecting a new system, automatically attempt a MIP session to avoid the default position of SIP. A history is maintained of systems visited, and for systems that did not support MIP in the past, a MIP session is not attempted, but rather SIP is initiated from the start.

主权项

1. A method for transitioning between a first wireless protocol having geographically dependent addressing and a second wireless protocol having non-geographically dependent addressing, the method comprising:
a wireless device detecting a new system requiring reconnect of a packet data service while in a state during which link layer connectivity is maintained for the packet data service; and determining whether the wireless device has previously stored support information for the new system indicating whether a session was previously established using the second wireless protocol, and if not, then the wireless device attempting to establish a new ession using the second wireless protocol with the new system, and when the new session using the second wireless protocol is established, the wireless device terminating use of the first wireless protocol thereby transitioning to the second wireless protocol, and storing information regarding the new system support for the second wireless protocol, and if so, then attempting to establish the new session with the new system using the first wireless protocol or the second wireless protocol dependent upon the previously stored support information.