Next Generation Network and Its Core Technology:Soft Switch

NGN(next generation network) is a hot point in the development of communication field at present. It is regarded as a new network being constructed with soft switch technology in the field. In this paper, summarily introduces the basic concept of next generation network and its researches in the aspects of communication system.And elaborately analyses the coye techndogt:soft switch, which can afford technical supports in network services. Points out its advantages and disadvantages in the development. It is useful for the future network development.