MAC protocols using directional antennas in IEEE 802.11 based ad hoc networks

Authors:
Young-Bae Ko;Jong-Mu Choi;Nitin H. Vaidya
Affiliations:
Division of Information & Computer Engineering, College of Information Technology, Ajou University, Suwon, South Korea;UMTS S-W Lab., Division of Mobile Communication, Samsung Electronics Co. LTD, Suwon, South Korea;Department of Electrical and Computer Engineering, and Coordinated Science Laboratory, University of Illinois at Urbana-Champaign, IL, U.S.A.
Venue:
Wireless Communications & Mobile Computing
Year:
2008

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A novel multi-channel MAC protocol with directional antenna for enhancing spatial reuse and bandwidth utilization in WLANs

Journal of Parallel and Distributed Computing
The design of a channel-access protocol for a wireless ad hoc network with sectored directional antennas

Ad Hoc Networks

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Abstract

Using directional antennas can be beneficial for wireless ad hoc networks consisting of a collection of wireless hosts. The most important benefit includes a reduction of the radio interference. Thus, it can significantly increase the spatial reuse, thereby improving the network throughput. To best utilize directional antennas, a suitable Medium Access Control (MAC) protocol must be designed. Current MAC protocols, such as the IEEE 802.11 standard, do not benefit when using directional antennas, because these protocols have been designed for omnidirectional antennas. In this paper, we present modified MAC protocols suitable for 802.11 based ad hoc networks using directional antennas. Our comprehensive simulation results demonstrate the performance improvement obtained with the proposed protocols. Copyright © 2007 John Wiley & Sons, Ltd.