ZTE

ZTE Communications ›› 2009, Vol. 7 ›› Issue (1): 33-35.

• Special Topic • Previous Articles     Next Articles

OAM Technology of Packet Transport Network

He Tingzong   

  1. ZTE Corporation , Shenzhen 518005 , P. R . China
  • Online:2009-03-25 Published:2020-03-03
  • About author:He Tingzong received his master’s degree from Tsinghua University. He is now a product planning manager responsible for optical transport products of the bearer network at ZTE Corporation. He was one of the compilers of the standard YD/T 1266-2003 Test Methods of Protection Schemes for SDH Rings initiated by China Communications Standards Association (CCSA), and published a paper named "Protection Technology of Packet Transport Network".

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Abstract: The Packet Transport Network (PTN ) technology includes Transport Multi-Protocol Label Switching (T-MPLS ) and Provider Backbone Transport (PBT ). T-MPLS is the simplified and reformed Multi-Protocol Label Switching (MPLS ). It drops MPLS’connectionless features and its transport-unrelated forwarding processing, but adds the network model of the transport layer, protection switching and Operation, Administration and Maintenance (OAM ) functionality. PBT enforces both OAM and protection functions, adds Time Division Multiplexing (TDM ) business simulation and clock functions, and strengthens multi-service support capability. But PBT has no functions of traditional Ethernet address learning, address broadcast and Spanning Tree Protocol (STP ). Both T-MPLS and PBT can well satisfy the requirements of packet transport. Compared to PBT, T-MPLS has better OAM functions.