A jamming-based MAC protocol to improve the performance of wireless multihop ad-hoc networks: Research Articles

Authors:
Shiang-Rung Ye;You-Chiun Wang;Yu-Chee Tseng
Affiliations:
Department of Computer Science and Information Engineering, National Chiao Tung University, Hsin-Chu 30050, Taiwan, ROC;Department of Computer Science and Information Engineering, National Chiao Tung University, Hsin-Chu 30050, Taiwan, ROC;Department of Computer Science and Information Engineering, National Chiao Tung University, Hsin-Chu 30050, Taiwan, ROC
Venue:
Wireless Communications & Mobile Computing - Performance Evaluation of Wireless Networks
Year:
2004

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Ad Hoc Networks

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Abstract

One critical issue in multihop ad-hoc networks is the medium access control (MAC). The IEEE 802.11 MAC protocol is originally designed for fully connected, one-hop ad-hoc networks but not for multihop ad-hoc networks. In addition to the well known hidden-terminal problem, we found that IEEE 802.11 also suffers from an erroneous reservation problem which occurs when RTS-CTS exchange fails but the channel is incorrectly reserved. In this paper, we propose a jamming-based MAC (JMAC) protocol that is not only free from both the hidden-terminal and the erroneous reservation problems but also allows more concurrent transmission/receipt activities for stations within each other's transmission range. The idea behind the JMAC is to separate source stations' traffic from destination stations' traffic into different channels (i.e. dividing the shared medium into two channels), and explicitly signal the channel status by jamming the channels. Simulation results show that although the channel division incurs some cost, the advantages of being free from the erroneous reservation and the hidden-terminal problems, and the benefits of more concurrent transmissions will compensate the cost and provide higher channel utilization when data frame size is median or large. Copyright © 2004 John Wiley & Sons, Ltd.