The Research And Realization Of The Multimedia Communication Based On Sip Protocol

As development and maturity of NGN (Next Generation Network), the offering ability of the value-added service has already nowadays become focal points of all operators'competition and development.The current situation of NGN is analyzed, and the relevant concepts that include its core agreement-SIP (Session Initiation Protocol) and the key partial-soft exchange are explained in this paper. The relevant contents of multimedia service that is made up of network system structure, ability of the comprehensive intellectual platform, as well as the type of the value-added service of the multimedia are discussed.The contents involved in the interface of intellectual platform, the management of the lifecycle, the business logic, the outside interface are detailedly described in this paper. Using distributed computing technology J2EE and combining object-oriented design thinking and design patterns, this paper design all relevant part that include sub-system function modules, service flow, and important class and method especially. At last multimedia service is implemented with the reliability, the cross platform, expansibility, the good elasticity.