METHOD AND SYSTEM ARCHITECTURE FOR ESTABLISHING A SPECIFIC COMMUNICATION SESSION IN A COMMUNICATION NETWORK

摘要

A method and network architecture for establishing a specific communication session between a user equipment (UE) (102) and a called entity (106) in a communication network (100) is disclosed. The communication network includes a home overlay network (110) and a visitor overlay network (112). The method includes registering the UE through a home-network entity (114) during registration of the UE with the home overlay network. The method further includes sending an indication message to the UE to indicate status of the registration of the UE. In addition, the method includes sending a session-initiation message to the home-network entity by the UE, to initiate the specific communication session. Further, the method includes routing the session-initiation message to a specific-session entity (122) attached with the home overlay network or the visitor overlay network.