NDLI: Collision avoidance in single-channel ad hoc networks using directional antennas

Content Provider	IEEE Xplore Digital Library
Author	Yu Wang Garcia-Luna-Aceves, J.J.
Copyright Year	2002
Description	Author affiliation: Dept. of Comput. Eng., California Univ., Santa Cruz, CA, USA (Yu Wang; Garcia-Luna-Aceves, J.J.)
Abstract	Three collision-avoidance protocols are analyzed that use omni-directional packet reception together with omni-directional transmissions, directional transmissions, or a combination of both. A simple model is introduced to analyze the performance of these collision avoidance protocols in multi-hop networks with arbitrary topologies. The numerical results of this analysis show that collision avoidance using a narrow antenna beamwidth for the transmission of all control and data packets achieves the highest throughput among the three collision avoidance schemes considered. Simulation experiments of the popular IEEE 802.11 MAC protocol and its variants based on directional transmissions and omni-directional packet reception validate the results predicted in the analysis. The results further show that narrow-beamwidth transmissions can also reduce the average delay experienced by nodes. It is concluded that the advantage of spatial reuse achieved by narrow-beamwidth transmissions outweighs that of conservative collision avoidance schemes featured by the omnidirectional transmission of some control packets. This is due to the fact that the latter requires far more stringent coordination of nodes with their neighbors and hidden terminals, which can lead to much more channel resource wasted due to nodes' excessive waiting time.
Sponsorship	IEEE Comput. Soc
Starting Page	640
Ending Page	649
File Size	502255
Page Count	10
File Format	PDF
ISBN	0769519202
ISSN	10636927
DOI	10.1109/ICDCS.2003.1203515
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2003-05-19
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Collision avoidance Ad hoc networks Directional antennas Protocols Performance analysis Spread spectrum communication Network topology Transmitting antennas Throughput Analytical models
Content Type	Text
Resource Type	Article
Subject	Computer Networks and Communications Hardware and Architecture Software

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