The transaction timeout processing in the communication session management

摘要

PROBLEM TO BE SOLVED: To avoid and recover from transaction timeouts during setup and management of communication sessions.;SOLUTION: Communication devices 14A handle transaction timeouts experienced during register transactions differently than transaction timeouts experienced during non-register transactions. For example, the communication device that has initiated a transaction initiates at least one subsequent transaction to the current proxy server when a non-register transaction experiences a transaction timeout. After experiencing a threshold number of consecutive transaction timeouts, expiration of a failure duration timer, or a transaction timeout associated with a register transaction, the communication device cancels the current communication session and sends a register message to a new proxy server.;COPYRIGHT: (C)2013,JPO&INPIT