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Problem statement: The application of Mobile Ad hoc NETworks (MANETs) has been&#13; increasing every day. Most applications that attract interest for use in current wired networks (e.g.&#13; video conferencing, on line movies and camera enabled instant messenger) would attract interest for&#13; MANETs also. Many applications that use MANETs include multimedia data that require Quality of&#13; Service (QoS) support for effective transmission. Basically meeting QoS is a mesh of multiple&#13; parameters. QoS routing based on multiple independent constraints has been proven to be NPcomplete.&#13; Hence, hardly any exact algorithms were proposed for this kind of problems. In this study&#13; we propose a new approach for QoS routing based on multiple constraints. Approach: QoS support&#13; can be achieved by finding a route satisfying the application requirements. This needs an admission&#13; control along the route to prevent new flows from consuming too many resources and disrupting the&#13; guarantees made to existing flows. In our work, the normal AODV is extended to perform QoS routing&#13; based on bandwidth requirement and link stability constraints. Link stability parameter is considered in&#13; an opportunistic way so that effective path meeting the required bandwidth and will last for complete&#13; session is established. Results: Simulation results show that our contention aware, link stability based&#13; route finding technique performs better than AODV in terms of throughput and control message&#13; overhead. It improves packet delivery ratio greatly without affecting the overall end-to-end throughput&#13; of existing flows. Conclusion: This multi constraint based AODV performs path finding with less&#13; overhead by adopting passive approach of listening to the medium. Hierarchical treatment of the&#13; metrics enables QoS robustness hence reduces subsequent route finding latency

An Effective Contention Aware Stable Path Finding Approach to Provide Quality of Service in Mobile Ad hoc Networks