Date Added: Jul 2012
To achieve Quality of Service (QoS) support for multimedia traffic, IEEE 802.11e specifies Hybrid Coordination Function (HCF) Controlled Channel Access (HCCA) technique. When it is applied in multi-hop networks, the performance results, however, reveal that there is significant degradation of throughput with high delay at high load conditions. This is due to the fact that routing is responsible for the successful packet delivery and QoS Support. In a single path routing protocol, although multiple paths are discovered by the source during the process of discovering a route, the path with the shortest delay is chosen as the best path while discarding the rest.