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High Throughput Route Selection in Multi-rate Ad Hoc Wireless Networks

Summary: High Throughput Route Selection in
Multi-rate Ad Hoc Wireless Networks
Baruch Awerbuch, David Holmer, and Herbert Rubens
Johns Hopkins University, Baltimore MD, USA
{baruch, dholmer, herb}@cs.jhu.edu
Abstract. Modern wireless devices, such as those that implement the
802.11b standard, utilize multiple transmission rates in order to accom-
modate a wide range of channel conditions. Traditional ad hoc routing
protocols typically use minimum hop paths. These paths tend to contain
long range links that have low effective throughput and reduced reliabil-
ity in multi-rate networks. In this work, we present the Medium Time
Metric (MTM), which is derived from a general theoretical model of
the attainable throughput in multi-rate ad hoc wireless networks. MTM
avoids using the long range links favored by shortest path routing in fa-
vor of shorter, higher throughput, more reliable links. We present NS2
simulations that show that using MTM yields an average total network
throughput increase of 20% to 60%, depending on network density. In
addition, by combining the MTM with a medium time fair MAC pro-
tocol, average total network throughput increases of 100% to 200% are
obtained over traditional route selection and packet fairness techniques.


Source: Awerbuch, Baruch - Department of Computer Science, Johns Hopkins University


Collections: Computer Technologies and Information Sciences