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Báo cáo hóa học: " Autonomous Power Control MAC Protocol for Mobile Ad Hoc Networks"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Autonomous Power Control MAC Protocol for Mobile Ad Hoc Networks | Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2006 Article ID 36040 Pages 1-10 DOI 10.1155 WCN 2006 36040 Autonomous Power Control MAC Protocol for Mobile Ad Hoc Networks Hsiao-Hwa Chen 1 Zhengying Fan 2 and Jie Li3 1 Institute of Communication Engineering National Sun Yat-Sen University Kaohsiung 804 Taiwan 2 Tech. Department FDC Inc. Ltd. Co. Tsuchiura 300-0873 Japan 3 Graduate School of Systems and Information Engineering University ofTsukuba Tsukuba 305-8573 Japan Received 18 July 2005 Revised 13 December 2005 Accepted 13 December 2005 Battery energy limitation has become a performance bottleneck for mobile ad hoc networks. IEEE 802.11 has been adopted as the current standard MAC protocol for ad hoc networks. However it was developed without considering energy efficiency. To solve this problem many modifications on IEEE 802.11 to incorporate power control have been proposed in the literature. The main idea of these power control schemes is to use a maximum possible power level for transmitting RTS CTS and the lowest acceptable power for sending DATA ACK. However these schemes may degrade network throughput and reduce the overall energy efficiency of the network. This paper proposes autonomous power control MAC protocol APCMP which allows mobile nodes dynamically adjusting power level for transmitting DATA ACK according to the distances between the transmitter and its neighbors. In addition the power level for transmitting RTS CTS is also adjustable according to the power level for DATA ACK packets. In this paper the performance of APCMP protocol is evaluated by simulation and is compared with that of other protocols. Copyright 2006 Hsiao-Hwa Chen et al. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. 1. INTRODUCTION Recently the research on wireless .