Abstract—QoS Routing has been studied to provide evidencethat it can increase network utilization compared to routingthat is insensitive to QoS traffic requirements. However,because of its complexity, QoS routing is still the missingpiece in a fully-fledged QoS architecture for the Internet.This paper exposes in detail the relationship between therouting algorithm and network condition (traffic load andthe scale of the network topology) in different scenarios. Wedemonstrate that network size affects the performance, andgive evaluation of different locations of source-destinationpairs. We also point out the importance of using length ofroute as a metric to evaluate algorithms. This has seldombeen used in previous simulation studies. This work confirmsand extends earlier studies, and offers new insights fordesigning efficient QoS routing algorithms for future largescalenetworks.

Index Terms—Quality of service, routing algorithm, hopcount,bandwidth

Cite: B.Peng, A.H.Kemp and S.Boussakta, "QoS Routing with Bandwidth and Hop-Count Consideration: A Performance Perspective," Journal of Communications, vol. 1, no. 2, pp. 1-11, 2006.