A QoS-based routing algorithm for PNNI ATM networks

Analysis Study of Path Rerouting And Handover Schemes for WATM/LEO Satellite Networks

“…This algorithm performs better than other routing algorithms such as PNNI sample routing algorithm and Iwata algorithms in terms of connection setup time , computational and storage overhead, all blocking probability and network throughput. The simulation results in [3] showed that call setup time is significantly reduced and the computational overhead and call blocking probability are lower compared to other PNNI routing algorithms. Network throughput is also improved by evenly distributing the traffic among several eligible paths.…”

“…In [3], a new QOS-based routing algorithm for Private Network to Network Interface (PNNI), ATM network has been proposed. (BHRA) Backward Hierarchical routing Algorithm for ATM networks was compared with conventional routing schemes.…”

“…Then the path with minimum length is computed using dijkestra algorithm to determine whether a feasible path exists. (e) A new QOS routing algorithm for ATM networks was proposed by Iwata [3], which is complaint with the PNNI protocol. The algorithm tries to find a path iteratively with different sets of path search approaches until the obtained path meets the requested QOS.…”

“…The analysis has been modeled by flow model which indicates that there are requirements of a higher network capacity and topology reengineering in order to support the same quality of service (QOS) for a mobile service. The dynamic variation of network traffic that affects on the Quality of service has been analyzed with different rerouting algorithms in [3]. A new QOS-based routing algorithm called Backward Hierarchical Routing Algorithm (BHRA)has been proposed to reduce the complexity and maximize network throughput.…”

“…This low altitude provides small end-to-end delays (20 ms) and low power requirements for both the satellites and the handheld ground terminals. In addition, the intersatellite links (ISL) make it possible to route a connection through the satellites network without using any terrestrial resources [3]. Due to LEO satellites move in reference to a fixed point on the earth .Due to this mobility, the coverage region of a LEO satellite is not stationary.…”