| With the continuous improvement of the IP technology, most operators will have IP network technology as the main bearing technology data. Passive optical network (PON), it is a concept of network resources, saving fiber agreement in light transparent, access playing an increasingly important role. Therefore the simple Ethernet technology and economy, the transmission structure PON combining PON over Ethernet, since 2000 cause for the extensive attention and operators. In the meeting, EFM IEEE802.3 EPON accelerated the standardization work. For attractive EPON, relatively low cost, simple, easy to maintain and expand to upgrade is a very significant EPON advantage. EPON structure in the transmission way without power, no electronic components, so easily, without maintenance, laying the basic management and operation cost long-term cost saving, Another client resources occupied EPON system tables, modularity, less investment, low initial system to return on investment, high, That is the future EPON system technology, most EPON system is a more business platform, for all the IP network transition is a good choice. Another EPON provides very high bandwidth, service scope and flexible bandwidth allocation. Using EPON deployed web is becoming a way of broadband network, a mainstream growth rate than by 150%. In the Internet can also carry voice and data services, network integration. Over the next few years China will enter a new growth in broadband access, especially in FTTH solution is given priority to, will become a mainstream EPON broadband technology. From technology, by optical transmission medium for EPON, without interference, no radiation, can well solve the transmission medium to twisted-pair xDSL access for the technical route of qualification rate is low by users, the line between the objective of apparent limitations. In addition, EPON communication system bandwidth than 1Gbit/s, 20km to the transmission distance, provides the ability and the deployment of flexibility has advantages. Finally, EPON system for ONU/ONT terminal equipment has strong ability of management. From a strategic perspective, based on the light xPON access technology can and Olympic Games, the world expo and central business district and other major subject, become the strategic point. Broadband Secondly, the key area of central business zone, especially notice shall be the long-term interests of the area, the implementation of the strategy, strategic level wiring with existing integrated wiring for business use, stack. From a business perspective, operators and deployment of optical access network can provide EPON with existing ADSL broadband access differentiation/LAN, and extension of new service ASON/MSTP transmission network optical transmission capacity, with its potential for the bandwidth Pi next-generation network and parameter setting, growing IP business (such as IPTV, etc.).This thesis mainly content as follows:1.access technology the concept, characteristics, topology structure, etc were introduced,2.the major technical access.3.the passive optical network (PON) technology, the development of passive optical devices, technical features and applications is analyzed,4 the based on Ethernet passive optical network (EPON) technical background, developing trend and technological characteristics, the future development trend are analyzed, and a detailed analysis of the network structure and EPON each component function, In the5.EPON advantages and developing trend of, after some feasibility study, moliyuan district 1,2 through EPON FTTB technology to achieve more business voice access+with data access. After the implementation of the project, not only can greatly enhance the ability to provide broadband, meet people of voice, data and video network convergence diversification demand, makes the colorful new business to flying unimpeded homes. |
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