On the effect of user mobility and density on the performance of protocols for ad-hoc mobile networks: Research Articles

Authors:
Ioannis Chatzigiannakis;Elena Kaltsa;Sotiris E. Nikoletseas
Affiliations:
Computer Technology Institute (CTI), P.O. Box 1122, 261 10 Patras, Greece;Department of Computer Engineering and Informatics, University of Patras, 26500 Patras, Greece;Computer Technology Institute (CTI), P.O. Box 1122, 261 10 Patras, Greece and Department of Computer Engineering and Informatics, University of Patras, 26500 Patras, Greece
Venue:
Wireless Communications & Mobile Computing - Special Issue: Mobility Management in Wireless and Mobile Networks
Year:
2004

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Abstract

In this paper, we demonstrate the significant impact of (a) the mobility rate and (b) the user density on the performance of routing protocols in ad-hoc mobile networks. In particular, we study the effect of these parameters on two different approaches for designing routing protocols: (a) the route creation and maintenance approach and (b) the ‘support’ approach that forces few hosts to move, acting as ‘helpers’ for message delivery. We study one representative protocol for each approach, i.e. AODV for the first approach and RUNNERS for the second. We have implemented the two protocols and performed a large scale and detailed simulation study of their performance. The main findings are: the AODV protocol behaves well in networks of high user density and low mobility rate, while its performance drops for sparse networks of highly mobile users. On the other hand, the RUNNERS protocol seems to tolerate well (and in fact benefit from) high mobility rates and low densities. Copyright © 2004 John Wiley & Sons, Ltd.