Reflections on Smart Antennas for MAC Protocols in Multihop Ad Hoc Networks

Hend Koubaa 1
1 RESEDAS - Software Tools for Telecommunications and Distributed Systems
INRIA Lorraine, LORIA - Laboratoire Lorrain de Recherche en Informatique et ses Applications
Abstract : Smart and directional antennas can be used to improve the throughput performance of wireless communications in ad hoc networks. This improvement consists basically of minimizing collision and increasing simultaneous communications. Directional antennas reduces potential collision zone since data packets are directionally transmitted. Smart antennas are more intelligent than directional antennas since they can dynamically point pattern nulls in the direction of interfering stations. In this paper, we consider the link capacity achieved by a set of portable stations sharing the same medium and equipped with smart antennas. We present an overview of related work based on directional and smart antenna use to improve signal reception. We introduce and discuss the problem concerned with smart antenna use for transmission based on CSMA MAC protocols. This problem consists principally of beam selection and handoff. A CSMA MAC protocol within a station equipped with a smart antenna, has to interact with the physical layer to manage beam use. Our discussion, taking into account hidden node and exposed node problems, is motivated by underlying overhead, symmetry assumption and beacon use.
Type de document :
Communication dans un congrès
European Wireless, Feb 2002, Florence, Italy, 7 p, 2002
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https://hal.inria.fr/inria-00100797
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Soumis le : mardi 26 septembre 2006 - 14:51:06
Dernière modification le : jeudi 11 janvier 2018 - 06:20:00

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  • HAL Id : inria-00100797, version 1

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Hend Koubaa. Reflections on Smart Antennas for MAC Protocols in Multihop Ad Hoc Networks. European Wireless, Feb 2002, Florence, Italy, 7 p, 2002. 〈inria-00100797〉

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