Several Issues in the Development of Packet Transport Networks

作     者：Jing Ruiquan 

作者机构：China Telecom Corporation Limited Beijing Research Institute Beijing 100035 P. R. China 

出 版 物：《ZTE Communications》 (中兴通讯技术（英文版）)

年 卷 期：2010年第8卷第3期

页      面：9-12页

学科分类：0810[工学-信息与通信工程] 08[工学] 081001[工学-通信与信息系统] 

基　　金：funded by the National High Technology Research and Development Program of China ("863"program) under Grant No.2007AA01Z2A4 

主　　题：Development Multiprotocol Label Switching Differentiated Service network architecture Traffic Engineering Quality of Service PTN QoS guarantee MPLS maintenance development based DiffServ analysis Profile defined issues views paper key 

摘      要：Several key issues affect the development and standardization of Packet Transport Networks （PTN） and Multiprotocol Label Switching Transport Profile （MPLS-TP）. These include the end-to-end Quality of Service （QoS） mechanism, Layered network architecture, introduction of layer-3 functions, and data-plane Ioopback functions. This paper introduces several views on the construction and maintenance of PTN, and on the requirements of PTN services. After an analysis of Traffic Engineering （TE） based on Multiprotocol Label Switching （MPLS） and Differentiated Service （DiffServ）, a service-oriented end-to-end QoS guarantee mechanism is proposed. An alternative to introducing layer-3 functions into PTN is also proposed, based on PTN layered architecture defined in the available MPLS-TP standards and drafts. Requirements of data-plane loopback functions are discussed in conclusion.