“光进铜退”热潮中二层汇聚网与光接入网的融合

Convergence of Optical Access Network and Lay 2 Aggregation Networks in the New Wave of Fiber Progressing & Copper Receding

在基于PON的"光进铜退"建设热潮中,如何优化整个二层网络的结构是关系到投资效率、业务能力与质量、运维成本的重要问题。本文重点从技术能力、建网和维护成本、网络扁平化的发展趋势、网络可靠性等方面综合分析了光接入网与L2(二层)汇聚网络融合的必要性和可行性,并给出了将来光接入网与L2汇聚网络融合的路线。针对这种融合的趋势,结合当前OLT和汇聚交换机的发展现状,提出了OLT和汇聚交换机的发展方向和急需解决的问题。最后,结合当前的网络现状,从充分利用现网资源,节约近期投资的角度,提出了近期光接入网的OLT上联组网模式。

In the paper, based on the analysis of technical capability, TCO（capex＋opex）, wind of hierarchy simplification, and reliability of networks, the convergence of optical access network and lay 2 aggregation networks is proposed. The evolution route of the convergence is investigated as well as progress of OLT/L2 aggregation switch equipments. Finally, current uplink means of OLT is given based on the analysis of development status of subscribers ＆ services, uplink resource, investment saving, etc..