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A Novel Improved DSR Algorithm Based on Cross-Layer Mechanism in Wireless Mesh Network

Routing in Wireless Networks is challenging because of the unpredictable behavior of the medium and the random variations in channel condition. All of these factors lead to poor performance in multi-hop wireless mesh networks specially with the conventional routing. In order to exploit all the advantages that the wireless medium offers, new routing metrics must be explored. These metrics should come from across-layer approach in order to make the routing layer aware of the local issues of the underling layers.In this paper we investigate a new cross-layer routing metric that takes into account available bandwidth as well as the number of retransmissions, thus aiming to minimize end-to-end delay. The experimental results show that the proposed cross-layer metric improves the performance of routing in terms of end-to-end delay and network throughput by selecting paths with high available bandwidth while also avoiding areas of MAC congestion.