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

Journal of Computer Science

D. S. Thenmozhi¹  M. Rajaram¹ 

关键词: Quality of service;    bandwidth estimation;    contention aware;    link stability;    multiconstraints;    Probability Distribution Function (PDF);    Medium Access Control (MAC);    simultaneous transmission;    ad hoc networks;    mobility model;   

DOI  :  10.3844/jcssp.2011.352.358

学科分类：计算机科学（综合）

来源: Science Publications

【 摘 要 】

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

【 授权许可】

Unknown