An MAC Protocol for Wireless Ad-hoc Networks Using Smart Antennas

Authors:
Wen-Tsuen Chen;Yen-Cheng Chen
Affiliations:
Institute of Communications Engineering, National Tsing-Hua University,Hsin-Chu 300, Taiwan.;Department of Information Management,National Chi Nan University,Puli, Nantou 545, Taiwan
Venue:
ICPADS '05 Proceedings of the 11th International Conference on Parallel and Distributed Systems - Volume 01
Year:
2005

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Abstract

Directional antennas can be used to increase the spatial reuse of wireless channels in multi-hop wireless ad-hoc networks. However, the use of directional antennas may lead to hidden terminal problems due to unheard RTS/CTS and asymmetry in gain. In this paper, we propose a new MAC protocol using smart antennas to overcome the hidden terminal problems. The proposed scheme uses different antenna patterns and gains in transmitting DATA and RTS/CTS/ACK frames. Simulation results show that the proposed MAC protocol improves the throughput of multi-hop Wireless LANs.