Method and apparatus for interworking voice and multimedia services between CSI terminal and IMS terminal

摘要

A method and apparatus is provided for communication between a first terminal capable of using both a Circuit Switched (CS) call and an Internet Protocol Multimedia Subsystem (IMS) session, and a second terminal capable of using the IMS session, in a communication system supporting a Combined CS call and IMS session (CSI service). If the second terminal sends a Session Initiation Protocol (SIP) request (INVITE) message to originate a voice service or a multimedia service including the voice service with the first terminal, a CSI Application Server (AS) of an IMS domain managing the first terminal separates a voice service-related component included in the request message from a multimedia service-related component, and generates and sends first and second request messages to the first terminal. Upon receipt of first and second response messages corresponding to the first and second request messages from the first terminal, the CSI AS generates a combined response message and sends the combined response message to the second terminal.

主权项

1. A method for receiving a multimedia service by a first terminal in a communication system, the method comprising:
transmitting, to a combined circuit switched call and internet protocol multimedia subsystem session (CSI) application server (AS), a first message including voice information and message information for communicating with a second terminal; and performing a voice call to the second terminal through a voice over IP (VoIP) voice bearer and a circuit switched (CS) voice bearer if a second message in response to the first message is received from the CSI AS, wherein the VoIP voice bearer is established between the first terminal and a media gateway (MGW), wherein the CS voice bearer is established between the second terminal and the MGW, and wherein the second message comprises a 200 OK message, received from the CSI AS, for the voice information and the message information.