Abstract

Mobile Ad hoc Networks (MANET) are wireless networks consisting of a collection of mobile nodes with no fixed infrastructure. Due to their decentralized, self-configuring and dynamic nature, MANETs offer many advantages and are easy to install. But many modern network applications, such as transmission of multimedia data require QoS which has raised a number of challenging technical issues for routing. To support multimedia applications, it is necessary for MANETs to have an efficient routing and QoS requirements. However, the rapid growth in number and diversity of real-time network applications has made it imperative to consider the impact of end-to-end delay requirements of traffic on network. In this article, we analyze and evaluate the performance of the network under different conditions. We study the conventional Ad hoc On demand Distance Vector (AODV) protocol and its combination with the QoS, then we apply the scheduling policy using (m,k)-firm constraint to the AODV protocol to ensure graceful degradation of QoS for real-time streams. The results obtained show that the constraint (m,k)-firm applied to AODV protocol for real-time streams, performs better than conventional AODV.

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