Cross-layer approach for real time communication in MANET

We consider a cross-layer design of mobile ad-hoc networks. Traditional networking approaches uses and optimize separately each of the three layers: physical layer, medium access and network layer. This may lead to largely suboptimal network designs. In this work, we propose a jointly optimal design of the three layers, and we show a significant performance improvement over the traditional approach. Limited battery power, other resource constraints and mobility of nodes make QoS provisioning difficult to achieve in MANET. This paper proposes a novel algorithm that uses cross layer parameters to select an optimum route on the basis of received SNR value, low delay and long route lifetime. The key components of our approach include a cross-layer design (CLD) to improve information sharing between different protocol layers. In this work, we modify the Ad hoc On-demand Distance Vector (AODV) routing protocol to avoid routing through bad quality links.