Patent ID: 7647374
Filing Date: 2010-01-12
Classification: H04L

Abstract:
1. A method comprising: registering a first party to a network, receiving an invitation message from said first party inviting a second party to a session, determining from a session information relating to said session whether said session is to be retained by said network, retaining the session by the network in response to the determining, said retaining comprising storing of at least part of said session information for a subsequent re-establishment or release of said session by said network on behalf of said first party, releasing said retained session by said network towards said second party on behalf of said first party, when said first party deregisters from said network or loses connection with said network, re-establishing said retained session by said network towards said second party on behalf of said first party, when said first party repeatedly registers to said network or re-establishes connection with said network, wherein said method is used for managing multiple simultaneous sessions between parties participating in one or a plurality of group calls, and wherein each of said parties is destined for being in respective sessions with all of the other parties or at least some of the other parties, at least the sessions between said first party and further parties being respectively divided in a first subsession between said first party and a network element, and a second subsession between said network element and a call-signaling entity serving a group call with at least one of said further parties, thereby combining first subsessions in a combined session between said first party and said network element, wherein said network element stores information in a register, said information indicating remembered sessions for parties.