A method and apparatus for session release in a communication system
supporting Internet Protocol (IP) communications. In one embodiment, when
the MS has lost a bearer connection (i.e., PPP session), the notification
is provided by a Packet Data Service Node (PDSN) to the serving Session
control Manager (SCM) via IP multicast. If two PPP sessions are active
for a given IP communication, and one PPP session is not lost, the PDSN
associated with the active PPP session sends a correction message to
ignore any notification message sent by the other PDSN. In an alternate
embodiment, the Authentication Authorization Accounting (AAA) server uses
start and stop accounting requests, received from PDSNs, to determine
when to notify the serving SCM to terminate an IP communication.