티스토리 뷰
고정 전화망이나 이동 통신망 등, 회로 스위치나 소켓 스위치가 서로 다른 공중 통신서비스를 IP기술이나 인터넷 전화에 쓰이는 프로토콜인 SIP(Session Initiation Protocol)로 통합하여, 멀티미디어 서비스를 실현 시키는 방식.
IP Multimedia Subsystem (IMS) 는 아키텍쳐 프레임워크로 Internet Protocol (IP) multimedia services를 전달한다. 원래는 무선 규격 몸체인 3GPP에 의해 설계되었다.
The IP Multimedia Subsystem (IMS) is an architectural framework for delivering Internet Protocol (IP) multimedia services. It was originally designed by the wireless standards body 3rd Generation Partnership Project (3GPP), as a part of the vision for evolving mobile networks beyond GSM. Its original formulation (3GPP R5) represented an approach to delivering "Internet services" over GPRS. This vision was later updated by 3GPP, 3GPP2 and TISPAN by requiring support of networks other than GPRS, such as Wireless LAN, CDMA2000 and fixed line.
인터넷에서 통합을 쉽게하기위해, IMS는 IETF 프로토콜을 사용(예를 들어 SIP)하여 어디서나 가능하게 한다. 3GPP 에 따르면, IMS는 어플리케이션을 구격화하도록 의도하지는 않았지만 무선과 와이어라인 터미널로부터 멀티미디어와 음성 어플리케이션의 접근을 돕는데 목적이 있다. 이것은 수평적인 control layer를 가짐으로 처리되었고 service layer의 접근으로부터 독립적이다.
To ease the integration with the Internet, IMS uses IETF protocols wherever possible, e.g. Session Initiation Protocol (SIP). According to the 3GPP,[1] IMS is not intended to standardize applications but rather to aid the access of multimedia and voice applications from wireless and wireline terminals, i.e. create a form of fixed-mobile convergence (FMC). This is done by having a horizontal control layer that isolates the access network from the service layer. From a logical architecture perspective, services need not have their own control functions, as the control layer is a common horizontal layer. However in implementation this does not necessarily map into greater reduced cost and complexity.
