Path selection with class distribution information in the integrated network

In an integrated network, QoS routing plays an essential role in supporting various classes with different priority and quality-of-service (QoS) characteristics. The path selection procedure is an important part of the QoS routing scheme. The existing path selection algorithms do not consider the class distribution information of residual bandwidth (RB-CDI). As a result, these algorithms may cause the sessions of higher priority classes to be preempted instead of those of lower priority classes. We propose a new and straightforward path selection algorithm to solve this problem. The proposed algorithm uses not only the information of residual bandwidth amount but also RB-CDI. We evaluate the proposed algorithm by comparing with existing path selection algorithms. The performance evaluations are done in various situations. We use the throughput of each class and the link utilization of the network as evaluation metrics