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A Hidden Node Aware Network Allocation Vector Management System for Multi-hop Wireless Ad hoc Networks | ||
| International Journal of Communications and Information Technology | ||
| مقاله 4، دوره 1، شماره 2، زمستان 2012، صفحه 15-18 اصل مقاله (858.83 K) | ||
| نوع مقاله: Research Paper | ||
| شناسه دیجیتال (DOI): 10.22111/cit.2011.96 | ||
| نویسندگان | ||
| M. Najimi؛ M. Sayad Haghighi | ||
| Department of Electrical Engineering, K. N. Toosi University of Technology | ||
| چکیده | ||
| Many performance evaluations for IEEE 802.11 distributed coordination function (DCF) have been previously reported in the literature. Some of them have clearly indicated that 802.11 MAC protocol has poor performance in multi-hop wireless ad hoc networks due to exposed and hidden node problems. Although RTS/CTS transmission scheme mitigates these phenomena, it has not been successful in thoroughly omitting these drawbacks. We argue that when eliminating hidden node effect with a given protocol is not feasible, one may sometimes earn more throughput by controlling or even wisely creating this phenomenon. In this paper we propose a novel solution to improve the performance of IEEE 802.11 MAC protocol in multi-hop networks through modifying NAV timer. We may call this method Dynamic NAV (DNAV) since the NAV timer operation changes dynamically with the change of environment variables. Simulation results show that our approach noticeably increases the throughput in multi-hop wireless ad-hoc networks. | ||
| کلیدواژه‌ها | ||
| Multi-hop ad hoc networks؛ Hidden node effect؛ Medium Access Control Protocol؛ IEEE 802.11 standard | ||
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آمار تعداد مشاهده مقاله: 2,748 تعداد دریافت فایل اصل مقاله: 1,520 |
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