Research On Service Isolation And Dynamic QoS Application In PTN Transport Network

With the popularity of smartphones,reduction in communication charges,rapid increase of access rate to long term evolution(LTE)wireless network and passive optical network(PON),and the applications continuously enriched,the explosive growth of communication traffic puts forward higher requirements for the network bandwidth and quality of service.In the SDH gradually withdraw from the Bearer network,PTN as a transmission network led by China Mobile Group,is carrying a growing number of data,online games,real time videos and other new businesses include the traditional voice businesses.At present,the 100 G,200G and 400 G interface for PTN system have developed by telecom equipment suppliers,the research of QoS application in PTN network is lagging behind,especially on the bandwidth occupation,service isolation and bandwidth utilization.Through combining theory with practice,in view of the problems of service isolation and bandwidth utilization,the channel isolation technique and dynamic QoS algorithm are studied after discussing PTN architecture,QoS technology and traffic engineering theory.The work and contribution are summed up as follows:1.Elaboration of the architecture and key technologies of PTN networking,research on technologies and application of QoS in PTN network,and discussion about the problems of QoS existing in PTN transmission network.2.Aiming at the problem of service isolation from high rate interface,the isolation technologies are analisied,such as FlexE subinterface technology,the ethernet subinterface technology and ODUk subinterface technology,and puts forward the application of QoS about channelization subinterface.3.According to the availability of bandwidth in traffic engineering,the fixed coefficient method,average factor threshold method and prediction decision method of dynamic adjustment algorithms for QoS are proposed to solve the problem of network congestion and bandwidth utilization in PTN system.4.The test and verification method of dynamic QoS solution are proposed,and the feasibility of dynamic QoS solution is illustrated with examples at last.