NDLI: Evaluating ad hoc routing protocols with respect to quality of service

Content Provider	IEEE Xplore Digital Library
Author	Novatnack, J. Greenwald, L. Arora, H.
Copyright Year	2005
Description	Author affiliation: Dept. of Comput. Sci., Drexel Univ., Philadelphia, PA, USA (Novatnack, J.; Greenwald, L.; Arora, H.)
Abstract	The ability of a mobile ad hoc network (MANET) to provide adequate quality of service (QoS) is limited by the ability of the underlying routing protocol to provide consistent behavior despite the inherent dynamics of a mobile computing environment. In this paper we study three MANET routing protocols: OLSR, DSR and AODV, with an emphasis on the effect they have on various QoS metrics. We describe and analyze how the protocols differ in the mechanisms they use to select paths, detect broken links, and buffer messages during periods of link outage. The effects of these differences are quantified in terms of packet delivery ratio, end-to-end hop count, end-to-end latency, and mechanism overhead. We show that the proactive protocol, OLSR, builds paths with consistently lower hop counts than the reactive protocols, AODV and DSR, a fact that leads to a reduction in end-to-end latency that assists a QoS model in meeting timing requirements and improves global network performance. We further show the impact of broken link detection latency on the packet delivery ratio. A routing protocol that can not quickly recover from link breakage caused by mobility renders a QoS model incapable of meeting delivery requirements. Finally, we analyze the effect of mobility on the distribution of end-to-end latencies. Traditionally, reactive protocols are criticized for buffering during the building of routes, however we also study buffering phenomenon caused by the proactive mechanisms of OLSR.
Starting Page	205
Ending Page	212
File Size	276065
Page Count	8
File Format	PDF
ISBN	0780391810
DOI	10.1109/WIMOB.2005.1512905
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-08-24
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Network topology Wireless application protocol Buildings Quality of service Bandwidth Streaming media Routing protocols Timing Delay Mobile ad hoc networks
Content Type	Text
Resource Type	Article

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