Patent ID: 7606556
Filing Date: 2009-10-20
Classification: H04L,H04W

Abstract:
1. A method, comprising: processing a session setup procedure initiated by a user equipment for establishing a session of a specific type to a called entity; receiving a session setup request to a network entity for establishing the session, wherein the session setup request includes location information and an identifier for identifying the called entity; accessing by the network entity a database which comprises location information and associated identifiers; determining an occurrence of a session setup in an internet protocol multimedia subsystem/packet switched network; when detecting that the identifier represents an emergency session in an area represented by the location information, continuing the session set-up by sending a message to the user equipment to inform the user equipment that the identifier is an identifier for initiating the emergency session; and in response to sending the message to inform the user equipment that the identifier is an identifier for initiating the emergency session, terminating the session setup in the internet protocol multimedia subsystem/packet switched network by the network entity without completing the emergency session setup in the internet protocol multimedia subsystem/packet switched network.