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http://dx.doi.org/10.3745/KIPSTC.2009.16-C.3.373

An improvement of Medium Access Control Protocol in Ubiquitous Sensor Networks  

Jang, Ho (구미1대학 컴퓨터)
Lee, Myung-Sub (영남이공대학 컴퓨터정보계열)
Jeon, Woo-Sang (중소기업기술정보진흥원)
Publication Information
The KIPS Transactions:PartC / v.16C, no.3, 2009 , pp. 373-382 More about this Journal
Abstract
we present more efficient method of a medium access for real-time ubiquitous sensor networks. Proposed MAC protocol is like the randomized CSMA/CA protocol, but unlike previous legacy protocols, it does not use a time-varying contention window from which a node randomly picks a transmission slot. To reduce the latency for the delivery of event reports from sensor nodes, we carefully decide to select a fixed-size contention window with non-uniform probability distribution of transmitting in each slot. We show that the proposed method can offer up to several times latency reduction compared to legacy of IEEE 802.11 as the size of the sensor network scales up to 256 nodes using a widely-used network simulation package, NS-2. We finally show that proposed MAC scheme comes close to meet bounds on the best latency being achieved by a decentralized CSMA-based MAC protocol for real-time ubiquitous sensor networks which is sensitive to latency.
Keywords
Wireless Network; Sensor Network; Mac Protocol; Contention Window; Backoff Procedure;
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Times Cited By KSCI : 1  (Citation Analysis)
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