Taking Advantage of Overhearing in Low Power Listening WSNs: A Performance Analysis of the LWT-MAC Protocol

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• 作者：Cristina Cano (1) cristina.cano@upf.edu
  Boris Bellalta (1)
  Anna Sfairopoulou (1)
  Miquel Oliver (1)
  Jaume Barceló (1)
• 关键词：WSNs – low power listening – B ; MAC – LWT ; MAC – analytical model
• 刊名：Mobile Networks and Applications
• 出版年：2011
• 出版时间：October 2011
• 年：2011
• 卷：16
• 期：5
• 页码：613-628
• 全文大小：394.6 KB
• 参考文献：1. 802.11, IS (1999) Wireless LAN medium access control (MAC) and physical layer (PHY) specifications. ANSI/IEEE Std 802.11. Revised 2007
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• 作者单位：1. NeTS Research Group, Department of Information and Communication Technologies, Universitat Pompeu Fabra, C/ Tanger, 122-140, 08018 Barcelona, Spain
• 刊物类别：Computer Science
• 刊物主题：Computer Communication Networks
  Electronic and Computer Engineering
  Business Information Systems
  
• 出版者：Springer Netherlands
• ISSN：1572-8153

文摘

LWT-MAC is a new Low Power Listening MAC protocol for WSNs designed to rapidly react to instantaneous increases of the network load. It takes advantage of overhearing by waking up all nodes at the end of a transmission to send or receive packets without needing to transmit the long preamble before. In this work, detailed analytical models of the LWT-MAC and B-MAC protocols, for both saturated and unsaturated conditions, are presented. Moreover, the key LWT-MAC parameters are optimized in order to minimize the energy consumption, constrained to obtain the same throughput as the IEEE 802.11 (CSMA/CA) MAC protocol. From the behavior of the optimal LWT-MAC parameters, a heuristic configuration is proposed. Finally, the LWT-MAC is compared to B-MAC, in both single and multi-hop scenarios, showing improvements in energy consumption, throughput and delay.