无源光网络与无线回传的融合技术

[摘要] 文章认为新一代无线回传承载网将需要提供更高的传输带宽、更多的用户数量以及更好的服务质量才能满足3G技术的需求，无源光网络具有带宽大、部署灵活、多业务承载能力强等特点，适合建设新一代无线回传承载网。文章给出了一种基于无源光网络(PON)的无线回传网络结构。在该网络中，光线路终端(OLT)放置在中心局，与无线核心网络连接；光网络单元(ONU)放置在移动基站处。无源光分路器和光缆构成OLT和ONU之间的无源光纤传输网络。

[关键词] 无源光网络；无线回传；分组化；时钟同步；服务质量

[Abstract] To meet the demands created by 3G technology, next-generation wireless backhaul networks require higher bandwidth, more users, and better service quality. Passive optical networks (PONs) have large bandwidth; they can be flexibly deployed; and they are able to carry multiple services. In this paper, we discuss the architecture of a wireless backhaul based on PON. In such a network, the optical line terminal is placed in a central office and connects with the wireless core network. The optical network unit is placed in the mobile station. A passive optical splitter and fiber optic cable constitute a PON between the OLT and ONU.

[Keywords] passive optical network; wireless backhaul; packetization; time synchronize; QoS