I. Introduction With Softswitch and future 3G services launch, the existing packet-based network services is increasingly apparent. ITU-T is also clear that the next generation network NGN is a packet-based bearer networks. The main use of existing data carrying optical fiber directly connected switches or through the MSTP SDH-based approach, there is a lack of 50ms former carrier-class protection and can not provide end to end QoS; the latter need to implement Ethernet to SDH reconciliation package packaging, increased overhead and costs, also increases the delay, not the economy to meet the future NGN bearer network for data services requirements.   Order to adapt to the development of next generation network, or more fundamentally correct the lack of structure and building out the existing metro network model of restraint, the flames of the network according to its own next generation network (NGN) understanding, put forward based on IP MSPP core, multi-service ring network solution. 2, IP-based packet core multi-service platform:
MSPP (Multi-ServiceProvisioningPlatform): multi-service delivery platform, which combines the bearer network and transmission network technology, a platform, and support data, voice and video traffic simultaneously switching and transmission. MSPP can be implemented on different platforms, according to different physical platform, can be classified based on WDM multi-service optical transport platform, based on SONET / SDH in the MSTP platforms, and IP-based packet core platform. War Network F-engineM8000 using RPR / MSR, flexible Ethernet ring technology, is a new generation of IP with MSPP function multi-service packet core platform, mainly located in the metro access and convergence layer, can be achieved: (1) Multi-service load: can support data, TDM and video services integrated bearing and high reliability transmission. (2) with the MSTP function: to provide 50ms ring operating within the capacity of automatic protection switching (APS),-based RPR / MSR technology fair ring bandwidth allocation mechanism to support the ring (single ring and tangent Central) , star, chain and other graphical network topology and automatic topology discovery and management capabilities, support for distributed fault location and performance monitoring. (3) layer packet switching and load: to provide Fast Ethernet, Gigabit Ethernet, E1, 2.5GbpsRPR/MSR, 10GbpsEthernet other interfaces, to meet customer network management and application business differentiation needs. F-engineM8000 from the business side of the interface, packet processing unit and the line side interface. Among them, the packet processing unit by the packet switch architecture, service identification unit, the business processing unit, packet forwarding engine, TDM emulation and network security protection unit and six other modules; line side of the unit by the automatic protection switching unit and the loop interface unit composition. MSPP specific functions of various parts of the following:
* Business side of the Interface: The main function is to provide service access interfaces;
* Packet switch architecture: hardware-based non-blocking high-speed switching;
* Business Identification Unit: The main function is to distinguish between conduct business;
* Business processing unit: the results based on business identify appropriate queuing and scheduling;
* Packet Forwarding Engine: complete the second floor of the main wire-speed forwarding; * TDM emulation unit: The main business of the completion of TDM emulation over Ethernet;