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专题导读光接入网是国家信息网络基础设施的重要组成部分,是实现“宽带中国”战略目标的关键所在。光接入网的主流技术为无源光网络(PON),它的基本特征在于连接多用户端设备与局端设备光接口的光分配网(ODN)由“无源”的光缆和光分合路器件构成。由此使得PON具有高可靠性、低成本、与接入网业务形态匹配、便于集中控制、便于运维等优势,并成为光接入网的主流技术。目前,由IEEE规范建议的基于千兆以太网的EPON以及由ITU-T规范建议的GPON已大规
Topic Introduction Optical access network is an important part of the national information network infrastructure and the key to realizing the strategic goal of “Broadband China.” The main technology of optical access network is passive optical network (PON). The basic feature of optical access network is that the optical distribution network (ODN) that connects the optical interfaces of multi-user equipment and central office equipment consists of optical fiber cables of “passive” Device composition. As a result, the PON has the advantages of high reliability, low cost, matching with the service pattern of the access network, facilitating centralized control, facilitating operation and maintenance, and becoming the mainstream technology of the optical access network. Currently, Gigabit Ethernet-based EPON proposed by the IEEE specification and GPON recommended by the ITU-T specification