The Study Of The Core Based On CM-IMS

IMS (IP Multimedia Subsystem) Multimedia System, is a new form of multimedia services that can meet the end customers are now more innovative, more diversified multimedia services. Currently, IMS is considered to be the core technology of next generation networks as well as mobile and fixed network convergence solution. The way of voice, data and video triple fusion between an important way of business. However, the majority of the world in the early stages of IMS network, the application of ways in which the industry.CM-IMS is based on 3GPP IMS R7 mobile version of the proposed innovative next-generation network architecture, China Mobile to achieve "broadband + IP + information " important solution strategy, which is a matter of core network, access equipment, business And support systems and terminal-end systems. In the network architecture, CM-IMS proposal of innovative IMS/PS/CS coexistence strategies, CS/IMS total number of programs, unified user management; in the end, China has independently developed the mobile client CM-IMS to support Multiple access, a variety of authentication and a variety of communication services.The author analyzes the CM-IMS project some of the key technologies, and the realization of these key technology programs compare a variety of projects, see the advantages and disadvantages of each program. The focus of the SBC architecture, SBC discovery mechanism, the program code number, code number allocation scheme, number of regular programs, bearing technical analysis, voice routing and other aspects.Finally, IMS Huizhou local construction projects, to discuss their access topology, SBC working mechanism of the whole agency, and gives access to the realization of the two cases, a strong proof of the feasibility of building the program.