Application Of Metropolitan Area Network With Packet Transport Network (PTN)

As the network IP process progresses,the existing SDH/MSTP net-work service access has been unable to meet demand. Transmission network is cu rrently insufficient capacity on line access network in the presence of the following five areas:insufficient bandwidth, port resources are insu fficient, limited service configuration, IP trans-mission network caused by the number of nodes MAN convergence layer over resource consumption se rious structural problems network.In order to solve the problems in the existing network, Zhengzhou mobile companies now use Packet Transport Network to carry multiple services, in particular grouping of businesses, the direction of technological development, but also the general trend. In Packet transport network put into use, the line will be part of running online businesses adjust to the Packet Transport Network, reduce the pressure on the SDII transmission network. Used as a transport bearer services Packet Transport Network metro networks,research Packet Transport Network in MAN networking and applicat ion. Papers should address the following issues:Packet Transport Network planning and networking;Packet Transport Network network maintenance, cutover, failure analysis.Packet Transport Network network bandwith multiplexing capability strong, large carrying capacity. Packet Transport Network in MAN concrete application of:Packet Transport Network network hierarchical network structure implemented independent network;bearer service type diversification, bandwidth capacity;make full use of the existing cable resources,conserve resources;statistical multiplexing capability strong.