Method for switching session of IMS network and EATF

摘要

A method for switching a session of an IP Multimedia Subsystem (IMS) network and an Emergency Access Transfer Function (EATF) entity are disclosed. The method includes: the EATF entity anchoring a call sent by a network element in a call initiation domain, and routing the call to an Emergency-Call Session Control Function (E-CSCF); the EATF entity receiving call transfer invite message sent by a network element in a call termination domain; and if identifying that the call transfer invite message is an invite message inviting to perform transfer of the call, the EATF entity performing media negotiation, and sending a response message carrying media information to the network element in the call termination domain.

主权项

1. A method for switching a session of an IP Multimedia Subsystem (IMS) network, comprising:
receiving, by an Emergency Access Transfer Function (EATF) entity, an emergency call which is routed by a Proxy-Call Session Control Function (P-CSCF) in a call initiation domain; anchoring, by the EATF entity, the emergency call, and routing the emergency call to an Emergency-Call Session Control Function (E-CSCF); receiving, by the EATF entity, a call transfer invite message sent by a Mobile Switching Center (MSC) server in a call termination domain; and when identifying that the call transfer invite message is an invite message inviting to perform transfer of the emergency call, performing, by the EATF entity, media negotiation, and sending a response message carrying media information to the MSC server in the call termination domain.