NDLI: Mitigating Performance Degradation in Congested Sensor Networks

Content Provider	IEEE Xplore Digital Library
Author	Kumar, R. Crepaldi, R. Rowaihy, H. Harris, A.F. Guohong Cao Zorzi, M. La Porta, T.F.
Copyright Year	2002
Abstract	Data generated in wireless sensor networks may not all be alike: some data may be more important than others and hence may have different delivery requirements. In this paper, we address differentiated data delivery in the presence of congestion in wireless sensor networks. We propose a class of algorithms that enforce differentiated routing based on the congested areas of a network and data priority. The basic protocol, called congestion-aware routing (CAR), discovers the congested zone of the network that exists between high-priority data sources and the data sink and, using simple forwarding rules, dedicates this portion of the network to forwarding primarily high-priority traffic. Since CAR requires some overhead for establishing the high-priority routing zone, it is unsuitable for highly mobile data sources. To accommodate these, we define MAC-enhanced CAR (MCAR), which includes MAC-layer enhancements and a protocol for forming high-priority paths on the fly for each burst of data. MCAR effectively handles the mobility of high-priority data sources, at the expense of degrading the performance of low-priority traffic. We present extensive simulation results for CAR and MCAR, and an implementation of MCAR on a 48-node testbed.
Sponsorship	IEEE Computer Society
Starting Page	682
Ending Page	697
Page Count	16
File Size	3723940
File Format	PDF
ISSN	15361233
Volume Number	7
Issue Number	6
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-06-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Degradation Telecommunication traffic Chemical sensors Wireless sensor networks Routing protocols Temperature sensors Traffic control Testing Large-scale systems Costs Congestion Wireless communication Wireless Sensor Networks
Content Type	Text
Resource Type	Article
Subject	Computer Networks and Communications Electrical and Electronic Engineering Software

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