The Next Generation Of Multi-user Access Unit Mdu Research And Implementation

Traditional wire line access network is based on DSL technology twisted-pair copper network. It can only provide very limit network bandwidth. Although DSL technology growing quickly in recent years, it still unable to meet the growing customer’s bandwidth requirement. The only alternative is to replace copper network with optical fiber network. But fiber to the home business (FTTH) is too expensive. The end user can not afford their high cost. Meanwhile, FTTH can not reuse the huge copper resource in current telecom networks. It is also a huge waste. Taking all these factors, shift the fiber access node to user building (FTTB+Lan or FTTB+xDSL) is a best choice. It can resolve the problem of deployment cost and customer bandwidth requirement both. This paper is study the development and implement technology of key equipment in FTTB:Multiple Dwelling Unit--referred to as MDU.This Paper primarily research the implementation technology of next generation of MDU equipment. Develop a product program design based on WinPath3network processor and ITU G.999.1standard. It solves previous generation of MDU equipment cost and performance issues. The contributions of this dissertation can be summarized as following:(1) Introduce the hardware design of MDU products. Analysis the effective bandwidth of G.999.1interface between main control board and ADSL services board. Help hardware to select the lower-cost Single-Serdes uplink ADSL service program. Meanwhile, two software programs designed to address the Ethernet uplink port identification and downstream traffic flow control problems, reducing equipment costs.(2) Analysis the MDU software design requirements and goals. According to hierarchical and data-centered design guidelines, the MDU was layered software architecture design, and then each layer was sub-divided to subsystems and completes the entire MDU software architecture design.(3) Study the WinPath3network processor PCE Filter matching mechanism, this key technology in-depth. Complete the design to use the PCE Filter matching mechanism to implement the MDU broadband services, voice services and protocol filtering forward design. Also complete the MAC address learning and packet transceiver mechanism design. Provide a complete set of forwarding layer software design based on WinPath3chipset. The MDU equipment that this paper research and studied has been successfully released in2010. According to its low price, strong performance, and intelligent management, it quickly occupied the market. Within a year, more than500million lines are shipped. Win a huge economic benefit for company.