Virtual path management framework with dynamic routing and rerouting schemes in hierarchical ATM network

Since each ATM virtual path (VP) contains bundles of virtual channels (VCs) , a VP layer network can serve as a server layer and each VC layer network can be a client Therefore the effective VC service provisioning depends la, er, completely on the reliability of the VP layer network. We propose the ATM virtual path (VP) management framework with dynamic routing and rerouti ng schemes in a hierarchical transport network. The routing algorithm aims to provide the globally optimal route in a hierarchical net work environmen t from the perspectives of maximization of network resource utilization and satisfaction of the end user's QoS requirement. The rerouting algorithm gu arantees network survivability in the event of network faults or performanc e degradations. We also propose the implementation model of the ATM virtual path network management system (VP-NMS). Lastly, we evaluate the routing a nd rerouting performance for a real network, the High Speed Information Net work (HSIN) of Korea Telecom.