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Seokwon Lee, Sungsoo Park, Gosan Noh, Yosub Park and Daesik Hong, "Energy-Efficient Spectrum Access for Ultra Low Power Sensor Networks", IEEE MILCOM, October 2012
[IEEE MILCOM]Status : | Presented |
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Date : | 2012-10 |
Title : | Energy-Efficient Spectrum Access for Ultra Low Power Sensor Networks |
Authors : | Seokwon Lee, Sungsoo Park, Gosan Noh, Yosub Park and Daesik Hong |
Conference : | IEEE MILCOM |
Abstract : | This paper investigates a dynamic spectrum access (DSA) scheme for ultra low power sensor networks (ULPSN) in an open spectrum where multiple systems coexist and interfere with each other. Low transmission power and simple communication protocol are significant obstacles for ULPSN to operate in the open spectrum. The DSA has been researched to solve this problem by assuming that coexisting systems can perfectly detect each other. However, this assumption is limited for ULPSN because detection of ULPSN in coexisting system is difficult due to sensitivity limitation of spectrum sensing. As a result, available spectrum is more scarce for ULP system than other coexisting systems. Thus, we derive a new Markov chain model of open spectrum access. Based on the Markov chain mode, we design a DSA scheme to maximize the energy efficiency and investigate the channel access and switch policy of the proposed DSA within the framework of partially observable Markov decision process (POMDP). The simulation results demonstrate that the proposed DSA scheme yields improved energy efficiency and lifetime compared to a random channel selection for ULPSN. |
URL : | http://ieeexplore.ieee.org/xpl/articleDe...r+Networks |
Download : | http://mirinae.yonsei.ac.kr/?module=file...95fd3c7f74 |
Seokwon Lee; Sungsoo Park; Gosan Noh; Yosub Park; Daesik Hong, "Energy-efficient spectram access for ultra low power sensor networks," MILITARY COMMUNICATIONS CONFERENCE, 2012 - MILCOM 2012 , vol., no., pp.1,6, Oct. 29 2012-Nov. 1 2012
doi: 10.1109/MILCOM.2012.6415750
keywords: {Markov processes;energy conservation;low-power electronics;protocols;radio spectrum management;telecommunication power management;wireless sensor networks;DSA scheme;Markov chain model;POMDP;ULPSN;channel access;coexisting systems;communication protocol;dynamic spectrum access scheme;energy efficiency;energy-efficient spectrum access;low transmission power;open spectrum access;partially observable Markov decision process;random channel selection;sensitivity limitation;spectrum sensing;switch policy;ultra low power sensor networks;Energy consumption;Energy efficiency;Interference;Markov processes;Niobium;Sensors;Switches},
URL: http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=6415750&isnumber=6415559
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