Computer Abstract—Energy consumption of nodes is a crucial factor that constrains the networks life time for Wireless Sensor Networks (WSNs). WSNs are composed of small sensors equipped with lowpower devices‚ and have limited battery power supply. The main concern in existing architectural and optimisation studies is to prolong the network lifetime. The lifetime of the sensor nodes is affected by different components such as the microprocessor‚ the sensing module and the wireless transmitter/receiver
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18th IEEE International Workshop on Quality of Service IEEE IWQoS 2010 16-18 June 2010 Tsinghua University‚ Beijing‚ China Conference Information IWQoS 2010 Sessions Authors Search Welcome Welcome to the IEEE IWQoS 2010 on CD-ROM. This disc is designed so that you may locate papers by session or author‚ as well as with full text search. Papers originated as electronic files and were converted to Adobe Acrobat PDF file format for cross-platiform access. Even though the
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explore better health monitoring systems that are both mobile and cheap. This work investigates the feasibility of using the ZigBee embedded technology in health-related monitoring applications. Selected vital signs of patients are acquired using sensor nodes and readings are transmitted wirelessly using devices that utilize the ZigBee communications protocols. A prototype system has been developed and tested with encouraging results. Keywords: Zigbee‚ wireless health monitoring. I. Compared
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of developing a non-mechanical hot plate wind and rain sensor. It aims to discuss practical aspects of the necessary hardware to fulfil such a function and different software approaches to controlling such a system. Specifically‚ it discusses an experiment based on 30W hot plates controlled by Labview in an attempt to measure changing wind and rain conditions. It also looks at the data gathered in this instance and calibration of the sensors. Finally it looks at ways of improving the functionality
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promoted the development of wireless sensor networks. A WSN consists of many sensor nodes densely deployed in a field‚ each able to collect environmental information and together able to support multihop ad-hoc routing. WSNs provide an inexpensive and convenient way to monitor physical environments. With their environment-sensing capability‚ WSNs can enrich human life in applications such as healthcare‚ building monitoring‚ and home security. A wireless sensor network (WSN) is a wireless network consisting
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Improvement on LEACH Protocol of Wireless Sensor Network (VLEACH) M. Bani Yassein‚ A. Al-zou’bi‚ Y. Khamayseh‚ W. Mardini Improvement on LEACH Protocol of Wireless Sensor Network (VLEACH) M. Bani Yassein‚ A. Al-zou’bi‚ Y. Khamayseh‚ W. Mardini Department of Computing Science‚ Jordan University of Science and Technology E-mail: {masadeh@just.edu.jo‚ a_zo3bi@yahoo.com‚ yaser@just.edu.jo‚ mardini@just.edu.jo } doi: 10.4156/jdcta.vol3.issue2.yassein Abstract This paper presents a new version of LEACH
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random sensor node deployment scenarios to find the sinks locations for a particular sensor nodes deployment. We have considered a 4x4 square grid wireless sensor network‚ where sinks and sensor nodes both are static. Locations of the sinks are deterministically placed. Locations of our sinks are taken from our deterministic sensor node deployment approach for 4x4 square grid region‚ where the network is 1-hop and 2-covered. Sinks are placed deterministically on grid cross points. But the sensor node
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Wireless Sensor Networks Muneeb Ali‚ Tashfeen Suleman‚ and Zartash Afzal Uzmi Computer Science Department‚ LUMS {muneeb‚tashfeens‚zartash}@lums.edu.pk Abstract Mobility in wireless sensor networks poses unique challenges to the medium access control (MAC) protocol design. Previous MAC protocols for sensor networks assume static sensor nodes and focus on energyefficiency. In this paper‚ we present a mobilityadaptive‚ collision-free medium access control protocol (MMAC) for mobile sensor networks
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Chapter 1 INTRODUCTION 1.1 Background of the Study Mankind has always tried to use technologies in order to improve his life. The wheel‚ for instance‚ was invented in order to transport goods saving forces and to move more quickly. The discovery of fire helped to heat him and to defend himself from wild animals. From the very beginning man has always looked for a better way of life. Time after time‚ he has continued to improve his environment‚ both at work and at home. The first automations
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Eruptions with a Wireless Sensor Network Geoffrey Werner-Allen∗ ‚ Jeff Johnson† ‚ Mario Ruiz‡ ‚ Jonathan Lees‡ ‚ and Matt Welsh∗ University {werner‚ mdw}@eecs.harvard.edu † University of New Hampshire jeff.johnson@unh.edu ‡ University of North Carolina {mruiz‚ leesj}@email.unc.edu ∗ Harvard Abstract— This paper describes our experiences using a wireless sensor network to monitor volcanic eruptions with low-frequency acoustic sensors. We developed a wireless sensor array and deployed it in July
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