Design And Practice Of Broadband Access Network Construction Solution Based On EPON For Beijing Unicom

Today, DSL copper technology widely used in broadband access networks and point to point fiber technology can not meet the requirement of continuously increasing access bandwidth requested by broadband value-added service. With the "last mile" problem of access networks arises, broadband comes to the main trend of access networks. It is necessary to adapt an advanced and sustainable development technology to meet Beijing Unicom's network construction requirement to the broadband comprehensive service. Based on the analysis in this paper, point to multiple points solution with PON for broadband access network has the following advantages:high bit rates, widely coverage, high capacity, flexible access topology, easily maintenance, low operation cost, good prospects of evolution. What's more, this solution and current DSL broadband access network can complement each other, and makes full use of current resources. It is the best technology to construct broadband access networks in China.From the view of Considering Beijing Unicorn's broadband access network, trend of broadband service development and the process of PON standardization, this paper compares EPON with traditional access method and shows that EPON is better in technology, maintenance and operation. In this paper, the typical topology pattern of networks is discussed, the necessity of adapting EPON to setup broadband access network is proposed and the available service model of EPON for Beijing Unicom is analyzed. In term of the requirement of bandwidth, multiple services and network reconstruction in Beijing Unicom, the scheme introducing EPON equipments to current network is designed, the position of EPON equipments accessing is determined, and the original network resources are rearranged so as to satisfy the normal running of networks with services provided by EPON equipments. By taking consideration of Beijing Unicom situation, a new network construction proposal to establish comprehensive service access network and optimize original P2P private network is made and this proposal is proved very good while applied in current network engineering of Beijing Unicom.