PTN承载网业务规划

Business Planning of PTN Bearer Network

随着全业务的开展及基站IP化的逐步深入,分组化乃大势所趋,从核心网至接入网均向IP化方向发展,新的业务种类越来越多,业务类型正从单纯的TDM业务为主、2 Mb/s为颗粒向以数据业务为主、宽带接口过渡,城域传送网正面临着重新规划建设的繁重任务。分组传送网(Packet Transport Network)技术以分组为主要承载对象,将IP技术与传输网技术相融合,可实现对传统业务和各种新兴业务的统一承载,简要介绍了PTN的技术特点,重点分析了PTN承载网2G、3G主要业务的规划模型和原则。

With full-service development and gradual deepening of the base-station IP, packet-based development is a general trend, and both core network and access network develop towards the IP-based direction. More and more new services occur, and the service type is transiting from principally TDM 2Mb / s particles network to principally data service, broadband interface network, and the metro transport network faces an arduous task of re-planning and re-construction. Packet Transport Network technology, with packet as the carried object and in combination of IP technology and transport network technology, realizes the uniform carrying of traditional services and all kinds of emerging services. The technical characteristics of PTN are briefly described, with focus on planning models and principles for 2G, 3G services of PTN bearer network.