DC-Gear:Gearing Duty Cycles in Delay-Constrained Wireless Sensor Networks  

DC-Gear:延时约束型无线传感网占空比调控策略研究(英文)

作　　者：刘文远 郭振格 李镇江 莫路锋 肖崇蕙 

机构地区：[1]Yanshan University [2]Hong Kong University of Science and Technology [3]Xi'an Jiaotong University

出　　处：《China Communications》2011年第1期50-57,共8页中国通信（英文版）

基　　金：supported by the National Basic Research Program of China(Grant No.2011CB302705);the National Natural Science Fourdation of China(60970123)

摘　　要：Many Wireless Sensor Network (WSN) systems are deployed in unattended areas using non-rechargeable batteries.To enable sustainable operations,most WSN systems employ duty-cycling mechanisms,such as Low Power Listening (LPL).For reliable delivery of each packet with LPL,the sender has to transmit a preamble that is long enough to span over a complete sleep interval of the receiver.In this way,the sensor nodes avoid idle listening,however,at the cost of remarkably increased end-to-end delay of multi-hop packet transmissions.To address this issue,in this paper we propose a new duty-cycling mechanism called DC-Gear.DC-Gear exploits a "sleep less but save more" phenomenon,which means increasing the duty cycle in a timely and appropriate manner whileminimizing the overall energy cost and satisfying the end-to-end delay constraint.We have implemented DC-Gear with TelosB motes and demonstrated its performance advantages through extensive experiments.Many Wireless Sensor Network （WSN） systems are deployed in unattended areas using non- rechargeable batteries. To enable sustainable opera- tions, most WSN systems employ duty-cycling mechanisms, such as Low Power Listening （LPL）. For reliable delivery of each packet with LPL, the sender has to transmit a preamble that is long enough to span over a complete sleep interval of the receiver. In this way, the sensor nodes avoid idle listening, however, at the cost of remarkably in- creased end-to-end delay of multi-hop packet trans- missions. To address this issue, in this paper we propose a new duty-cycling mechanism called DC- Gear. DC-Gear exploits a ＂ sleep less but save more＂ phenomenon, which means increasing the duty cycle in a timely and appropriate manner while minimizing the overall energy cost and satisfying the end-to-end delay constraint. We have implemented DC-Gear with TelosB motes and demonstrated its performance advantages through extensive experiments.

关 键 词：DC-Gear wireless sensor networks duty cycle energy cost delay-constrained 

分 类 号：TP212.9[自动化与计算机技术—检测技术与自动化装置] TN929.5[自动化与计算机技术—控制科学与工程]