基于MPLS-TP的PTN技术广泛用于运营商城域传送网，为LTE回传、集客专线、家庭宽带等业务提供端到端高质量承载。近年来，用户信息量、业务种类等需求激增，对PTN在多业务承载、带宽容量、OAM、保护及设备集成度等方面提出了更高要求。城域POTN通过研究分析设备转发平面、光层、映射路径、OAM与保护等关键技术，全面优化和革新设备，将PTN与OTN深度有机融合。实际应用中，POTN组网可根据业务需求灵活选择承载模型，具有良好的应用发展前景。%PTN technology based on MPLS-TP is widely used in metro transport network, to provide high quality end-to-end carrier for LTE service, commercial customer service and family broadband service. In recent years, with the rapid development of user information and various kinds of service, PTN network is facing the new chal enges and further need, including unified multi-service transport, bandwidth expansion, OAM, protection and equipment integration. By researching and analyzing key tech-niques such as equipment forwarding plane, optical layer, mapping path, OAM and protection, Metro POTN has a comprehen-sive optimization and innovation of the equipment, better integrates PTN and OTN technology deeply. In practical application, POTN network can flexibly choose service transport model according to the needs of the service, it has a good development prospects.
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