To ensure the continuity of the management of communication sessions applied from a mobile terminal fourth generation

摘要

The present invention relates to a process for ensuring the continuity of the session management of communications made from a mobile terminal (130) of the fourth generation communicating on an ip network, said system comprising at least one radio network (110) provided with a plurality of base stations (111) with which said terminal (130) is able to communicate, said radio network (110) being connected by means of access gangways (113, 113b, 113c) to an interconnection network (120) provided with applications servers (150a, 150b, 150c) session management of communication sessions of a mobile terminal (130) being controlled by one of said brokers (150a, 150b, 150c), the method comprising at least the following steps: • during the displacement of the mobile terminal (130), causing a change of the access gateway, the new gateway (113b) transmits a warning message to a new management server (150b); the new management server (150b) sends an interrogation request to the other servers (150a, 150c) for the purpose of recovering the context of a call from the initial server (150a) which managed the session before the displacement of the terminal (130); the new server (150b) transmits to the mobile terminal (130) an invitation, accompanied by the parameters of connection, so that said terminal can be connected to the new server (150b).