ZTE

ZTE Communications ›› 2010, Vol. 8 ›› Issue (3): 17-21.

• Special Topic • Previous Articles     Next Articles

Ring Protection and Survivability Mechanisms for Packet Transport Networks

Lu Yueming   

  1. Key Laboratory of Information Photonics and Optical Communications of Ministry of Education, Beijing University of Posts and Telecommunications, Beijing 100876, P. R. China
  • Online:2010-09-25 Published:2020-02-28
  • About author:Lu Yueming received his PhD degree from Xi’an Jiaotong University, and is currently a professor at Beijing University of Posts and Telecommunications. He is also a member of the China Computer Federation. He has been engaged in researching computer networks, packet transport networks, and intelligent optical networks for years. He has presided over and participated in 5 nationally funded projects, has been granted 11 patents, and has published over 70 papers.
  • Supported by:
    This work was funded by the National High Technology Research and Development Program of China (“863”program) under Grant No. 2007AA01Z252.

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Abstract: Packet Transport Networks (PTNs) must resolve issues in their protection and recovery mechanisms. These issues include the detection performance of Operation, Administration and Maintenance (OAM), network resource optimization, resource allocation deadlock, and resource deployment blocking. Traditional protection and recovery mechanisms cannot meet the requirements of PTN. In order to improve the protection and recovery performance, network resource use, probability of service recovery, and to decrease the probability of service blocking, this paper introduces overlapped segment shared protection, Pre-configured Multi-Cycle (P-mcycle), conflict-free algorithm, and delay restoration algorithm. Only with appropriate protection and restoration mechanisms is it possible to achieve smooth evolution from TDM networks to integrated packet-based bearer networks and all-IP services.