Patent ID: 8249019
Filing Date: 2012-08-21
Classification: H04W

Abstract:
1. A system for handing an emergency session with a user equipment (UE) from a packet switch (PS) domain to a circuit switch (CS) domain, the system comprising: an eNodeB in the PS domain; a Mobility Management Entity (MME) in the PS, the MME configured to receive from the eNodeB a relocation message for an emergency call; a Mobile Switching Center (MSC) Server in the CS domain, the MSC Server configured to receive from the MME a handover request via a first interface, the handover request including an emergency call indication; and an Emergency Call Session Control Function (E-CSCF) communicatively coupled to the MSC Server via a second interface of the MSC Server, the E-CSCF configured to receive a session transfer request from the MSC Server.