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    Wireless Sensor Network

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    INDEX 1. INTRODUCTION 1 1.1 Wireless sensors Deployment 2 1.2 Wireless Sensor and Actor Networks 3 1.3 The Physical Architecture of WSANs 3 1.4 Difference between WSNS and WS 4 1.5 Requirement of WSNs 5 2. Wireless Ad-Hoc Network 5 3. Current Issues and solution 6 3.1 Key management issue for future 9 4. Advantages, Disadvantages and Applications of WSNs 10 5. Conclusion 11 6. References 12 List of figures

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    Wireless Sensor Network

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    I. INTRODUCTION Wireless Sensor Network consists of highly distributed Autonomous sensors nodes to monitor physical or environmental conditions, such as temperature, sound, vibration, pressure, motion or pollutants and to cooperatively pass their data through the network to a receiver (destination) [1] [7]. A sensor node consist of a radio transceiver with internal antenna or connected to external antenna, a microcontroller and electronic circuits for interfacing with the sensors and energy source

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    Wireless Networks

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    Wireless services symbolizes a development of technology, and perhaps a new era of telecommunications, but these services have been used for over a century and remain identical with the "radio". The modest beginning of wireless services takes us back to the 19th century at time when Guglielmo Marconi, "the father of radio" made his mark in the world of wireless technology. When Marconi started experimenting with radio waves (Hertzian Waves) in 1894 his idea was to produce and detect radio waves

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    wireless sensor networks

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    A Wireless Sensor Network (WSN) consists of spatially distributed autonomous sensors to cooperatively monitor physical or environmental conditions, such as temperature, sound, vibration, pressure, motion or pollutants. Trust in networks may be defined as the degree of belief or confidence about the nodes on the past interactions and observations. So trust becomes a major issue for reliable communication in WSN under constraints. We propose a trust worthy framework for WSN that considers challenges

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    systems (MEMS) and wireless networks are opening a new domain in networking history. Sensors; often called "smart dust" are low cost small tiny devices with limited coverage, low power, smaller memory sizes and low bandwidth, will play a key role in collecting and disseminating data from the fields where ordinary networks are unreachable for various environmental and strategical reasons. There have been significant contributions to overcome many weaknesses in sensor networks like coverage problems

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    events. III) Classify the object that has been detected. IV) Track an object. Sensing principles include mechanical, chemical, thermal, electrical, chromatographic, magnetic, biological, fluidic, optical, ultrasonic, and mass sensing. The sensor networks may be exposed to hostile environments like high temperature, high noise level or corrosive chemicals. Typical sensor parameters include physical measurement, Chemical and biological measurement, and event measurement. The hardware components of

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    Abstract One of the major challenges in wireless sensor networks (WSNs) deployment is to decrease sensor node's energy consumption to prolong the lifetime of the finite-capacity batteries. Using multihop has been viewed as one of the main techniques to prolong operational lifetime in wireless sensor networks. In this paper we offer a study on transmission power control in IEEE 802.15.4 multihop wireless sensor networks using typical Telosb platform parameters, which is IEEE 802.15.4 standard

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    Wireless Sensor Network (WSN) consists of a large number of low cost sensor nodes depolyed in parking area. These sensor nodes form a multi-hop ad-hoc network by wireless commnunication. Each sensor node detects whether the vehicle is parked, samples and transmits the information to base station where the information is gathered and processed. WSN can be applied to many other fields such as habitat monitoring, environment monitoring, smarthome, intelligent transportation and so on. The industrialization

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    Introduction The range of wireless networking technologies is extended to cover voice networks and general data, which allows users to transmit different types of data through wireless connections over long distances, besides covering the techniques of infrared light and radio frequency optimal for short-range wireless communications. And with the popularity of laptops, hand phones, handheld computers, PDAs (PDA), pen-based computer, GPS devices, and post-pc era. Intelligent electronics devices that

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    Wireless Networks: Security and Safety Issues

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    mobile and wireless networks with heterogeneous infrastructures , sharing serious and sensitive information, these ubiquitous computing environments ; however, may arise some security and privacy issues. Indeed, security is becoming increasingly a major issue in ubiquitous computing environments. This is because the big difference between traditional wired networks; and wireless, sensor and mobile ad hoc networks that are used in UbiCom environments. Therefore, ensuring that these networks, sensitive

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