Virtual private network control system concept

NTT has offered the advanced network service system to satisfy customer demand for new services in a timely manner and also has proposed a hierarchical network data management system called the advanced network service support system. Recently, demand for network service flexibility has been increasing especially in the business environment. The virtual private network service, which allows users to define their own network structure, numbering plan, traffic control and billing conditions on the public network, can satisfy these demands. This service can be realized by the network function virtualizing technique based on the hierarchical network data management architecture, and enables service definition on a logical service network independently of the switching network structure and functions. It can be said that a kind of operating system (OS) for network control needs to be built that provides new services that are independent of network feature components. In this paper, virtual network control architecture is discussed and the virtual private network service is outlined as a typical application