A METHOD FOR MOBILITY MANAGEMENT IN A SYSTEM ARCHITECTURE SUPPORTING MOBILITY BETWEEN DIFFERENT ACCESS SYSTEMS.

摘要

One object of the present invention is a method for Mobility Management MM in a system architecture supporting mobility between different access systems, such as a legacy 3G system and a LTE long term evolution system, having separate Core Network CN-level MM entities while using common MM Area, said method comprising a step of : - when a User Equipment UE leaves the coverage of a first one of said access systems where it is in a Non Radio Connected state as seen from Radio Access Network RAN, but seen in Connected State from CN-level MM entity, such as in a URA-PCH state of legacy 3 G system, for the coverage of a second one of said access systems where it is in Idle state as seen from CN- level MM entity, putting the UE into Idle state as seen from CN- level MM entity of said first access system.