Mechanisms of Ring Protection and Survivability for Packet Transport Network
Yueming Lu · ZTE communications · 2010
In its protection and restoration mechanisms,Packet Transport Networking(PTN),is facing many challenges.Such challenges arise in the areas of Operation Administration and Maintenance(OAM) detection performance,network resource optimization,resource allocation deadlock,and resource deployment blocking.Traditional mechanisms of protection and restoration cannot meet the requirements of Packet Transport Networks.In order to improve protection and restoration,network resource use,probability of service restoration,and to decrease the probability of service blocking,this paper introduces mechanisms such as overlay section protection,pre-configure pre-planned cycle,conflict-release algorithm,and delay restoration algorithm.Finally,it concludes that only the protection and restoration mechanism can reasonably achieve network integration,network operation,and the smooth evolution from TDM to packet bearing networks.