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What is Wireless Sensor Network

Handbook of Research on Computational Simulation and Modeling in Engineering
Is a self-organised, infrastructure-less and distributed wireless network of small and very limited electronic devices called sensor nodes.
Published in Chapter:
Quality of Service and Radio Management in Biomedical Wireless Sensor Networks
Carlos Abreu (Instituto Politécnico de Viana do Castelo, Portugal), Francisco Miranda (Instituto Politécnico de Viana do Castelo and CIDMA of University of Aveiro, Portugal), and Paulo M. Mendes (Universidade do Minho, Portugal)
DOI: 10.4018/978-1-4666-8823-0.ch023
Abstract
Biomedical wireless sensor networks enable the development of real time patient monitoring systems, either to monitor chronically ill persons in their homes or to monitor patients in step-down hospital units. However, due to the critical nature of medical data, these networks have to meet demanding quality of service requirements, ensuring high levels of confidence to their users. These goals depend on several factors, such as the characteristics of the network deployment area or the network topology. In such context, this chapter surveys the main applications of biomedical wireless sensor networks, taking into account the key quality of service requirements of each one of them. Finally, it presents an analytic method, and its experimental validation, to help engineers managing the radio power of the network nodes in order to improve the communications and the quality of service provided by the network while minimising the energy consumption and, thus, maximising the network lifetime.
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More Results
Network-Wide Broadcast Service in Wireless Sensor Networks
The network that contains sensor nodes for sensing the ambient environment. Each sensor node may also perform tasks such as processing data and communicating with neighboring sensor nodes. The communication is often done by wireless communications. And often there is a base station in the network, where sensing data are sent for further utilization.
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Balanced Energy Consumption Approach Based on Ant Colony in Wireless Sensor Networks
A sensor network consists of thousands of sensor nodes. It is used to monitor physical or environmental conditions such as sound, pressure, temperature etc. It is powered by battery and also energy constrained.
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On the Use of Artificial Intelligence Techniques in Crop Monitoring and Disease Identification
A network composed of physically small, low-power network nodes that also incorporate sensing functionality.
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Natural Computing in Mobile Network Optimization
Wireless Sensor Network (WSN) is composed of sensor nodes with various sensing abilities e.g. temperature, light, acceleration etc. Sensor nodes collect the status of an object and send to the sink node. These sensor nodes can interact with each other. Wireless sensor networks are used to monitor the status of real time environment. The sensor network consists of a number of sensor devices which are deployed over a geographical area. Sensor network protocols and algorithms possess self-organizing capabilities. WSN nodes encompass the following components: embedded processor, low-power sensing device, power module and wireless communication subsystem. The embedded processor is used for collecting and processing the signal data taken from the sensors. Their processing capabilities are utilized to perform computations locally and convey the required data only which is partially processed. Wireless communication subsystem is used for data transmission. The power source consists of a battery with a limited energy budget. Sensors make a measurable response if any change occurs in the physical condition like temperature, humidity etc. The communication technologies used in wireless communication are RFID, Zigbee, IEEE 802.15.4 etc. Sensor networks consist of different sensor nodes such as acoustic, thermal, radar, seismic and visual able to monitor a variety of condition including humidity, temperature, vehicular movement, soil makeup, pressure, the presence of certain objects, noise levels etc. Sensor nodes can be used for continuous sensing, event detection, event ID, location sensing and local control of actuators. The applications of wireless sensor network can be categorized into military, environment, health, home, disaster relief. Different deployment technologies are used for wireless sensor network: Regular deployment where sensor nodes can be allotted according to a well planned, fixed manner. In such case data is travelled through a predefined path. This deployment is generally used in home networks, industrial sector etc. Random deployment means distributed sensor nodes over a finite area. When the sensor node deployment scheme is not predefined, optimal positioning of cluster head becomes vital for energy efficient network operation. Sensor nodes can be featured with mobility where nodes can move to manage the deployment difficulties and passively moved about by an external force i.e. water, wind and vehicle. This type of sensors is generally used in battle field surveillances, emergency situations i.e. fire, Volcano, Tsunami.
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Innovative Model of Internet of Things for Industrial Applications
It is the network of sensors that are connected wirelessly to each other and to a central computer or server. These networks are used to gather and transmit data from various environmental or industrial sources, such as temperature and humidity sensors, traffic monitoring sensors, or security cameras.
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Robustness in Neural Networks
A network of distributed sensors linked by wireless connections.
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Introduction and Overview of Wireless Sensor Networks
A network consisting of some wireless sensor nodes that are distributed spatially for cooperatively monitoring physical or environmental conditions.
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Internet of Things-Enabled Smart Entry System for Telecom Sites
It's a wireless networking technology that allows devices to interface with the internet.
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Performance Evaluation of Quality of Service in IEEE 802.15.4-Based Wireless Sensor Networks
A Wireless Sensor Networks (WSN) consisting of spatially distributed tiny, autonomous and compact devices called sensor nodes or motes are deployed in a remote area to detect the phenomena, collect and process data and transmit sensed information to users.
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Clustering in Wireless Sensor Network: A Study on Three Well-Known Clustering Protocols
A distributed system consists of a large number of small electronic devices called sensor nodes, each node performs a particular job depends on the used application, which is based mainly on its work on the collection of information from the surrounding environment. Usually, sensor nodes are deployed randomly and communicate wirelessly.
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Power Issues and Energy Scavenging in Mobile Wireless Ad-hoc and Sensor Networks
A wireless sensor network (WSN) is a wireless network consisting of spatially distributed autonomous sensor nodes that cooperate to carry-out monitoring task in the deployment area and to transmit the gathered data to a base station through a wireless link.
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Exploring Coverage within Wireless Sensor Networks through Evolutionary Computations
A wireless network consisting of spatially distributed autonomous devices using sensors to cooperatively monitor physical or environmental conditions at different locations.
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The Use of Body Area Networks and Radio Frequency Identification in Healthcare
A collection of wireless devices, including sensors, actuators, and data processing devices (e.g. sink nodes), that are deployed to monitor an area. They are typically designed for long battery life and robustness in terms of maintaining network communication. They typically do not have the same size and weight restrictions as devices in a BAN.
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Role of Edge Computing to Leverage IoT-Assisted AAL Ecosystem
It is a self-configured wireless network of sensors or sensing devices to collect physical or environmental data and send the data wirelessly to a central location to get connected to the external world.
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Secure and Reliable Knowledge-Based Intrusion Detection Using Mobile Base Stations in Smart Environments
Wireless sensor network (WSN) refers to a group of spatially dispersed and dedicated sensors deployed to monitor/track any object of interest.
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AoSP-Based Secure Localization for Wireless Sensor Network
A network consists of sensing nodes and one or more sinks connected through wireless connection. Sensing nodes sense some particular event and disseminate collected data through multihop communication through various intermediate nodes to the sink.
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Pervasive Wireless Sensor Networks
A network comprised of small, communication-enabled microcontrollers with an array of sensors and actuators which rely on batteries or ambient environmental energy for power. These components are often referred to as sensor nodes.
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Wireless Sensor Networks: A Technical Survey
WSN is a network of small size sensor nodes which are densely deployed for monitoring the environment.
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Application of Data Mining in Smart Grid Technology
A network comprising of sensor, communication transceivers, memory, processing unit and power supply. Wireless sensor network is useful to convey various parameters such as current, temperature, humidity etc. to the remote monitoring and control unit by using wireless communication technology.
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Priority Encoding-Based Cluster Head Selection Approach in Wireless Sensor Networks
Wireless sensor network is defined as autonomous network which consists of a number of sensor nodes and a central node known as Base Station. The sensor network main function is providing the observation capability to the network. The nodes in the network are usually battery powered and it is not easily feasible to recharge or replace the battery. The nodes are responsible for collecting the information from the environment and transfer it to the central node for further processing. The communication in the node is usually done in either single or multi hop fashion.
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Wireless Access Networks for Smart Cities
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IoT-Based Management of Smart Microgrid: Smart Energy System
A network comprising of sensor, communication transceivers, memory, processing unit and power supply. Wireless sensor network is useful to convey various parameters such as current, temperature, humidity, etc. to the remote monitoring and control unit by using wireless communication technology.
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QoS: Requirements, Design Features, and Challenges on Wireless Sensor Networks
It is a set of related devices with small size and some resource limitations that are used to collect data from the physical world, and gather them through a wireless interface to a place were this information would be used. In some cases a wireless sensor node could be used in automation closed loops to make some control activities, very close to the place where the physical process is located.
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Improved Cross-Layer Detection and Prevention of Sinkhole Attack in WSN
Wireless sensor network (WSN) refers to a group of spatially dispersed and dedicated sensors deployed to monitor/track any object of interest.
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A Comparative Study of Attacks, Security Mechanisms, Preventive Measures, and Challenges in Wireless Sensor Networks
WSN refers to a group of spatially dispersed and dedicated sensors for monitoring and recording the physical conditions of the environment and organizing the collected data at a central location. WSNs measure environmental conditions like temperature, sound, pollution levels, humidity, wind speed and direction, pressure, etc.
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Building Mobile Sensor Networks Using Smartphones and Web Services: Ramifications and Development Challenges
networks composed of geographically dispersed sensors that work together to monitor physical or environmental conditions, such as air pressure, temperature, or pollution.
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Cognitive Radio Sensor Networks
Wireless Sensor Network is composed of autonomous sensor nodes, which are deployed in a region to monitor the environmental conditions and collect data from them.
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Reducing Simulation Runtime in Wireless Sensor Networks: A Simulation Framework to Reduce WSN Simulation Runtime by Using Multiple Simultaneous Instances
Network of multiple sensor nodes used for monitoring the environment where they are deployed. Usually these sensor nodes are very limited in processing and energy resources.
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