Introduction to Wireless Sensor Network

Wireless Sensor Network Introduction,Characteristics of wireless Sensor network, issues of wireless Sensor network,Issues in Wireless Sensor Network, Characteristics of Wireless Sensor Network,Components of a Sensor Node


1.1 Introduction 

Keywords: Characteristics of wireless Sensor network, issues of wireless Sensor network,Issues in Wireless Sensor Network, Characteristics of Wireless Sensor Network,Components of a Sensor Node
Wireless Sensor Network (WSN) is collection of different sensor nodes deployed in an area to monitor the environmental and physical conditions parameters like temperature, pressure, movement of objects, light etc. In a wireless sensor network sink node is also there which also known as base station. The development of wireless sensor networks is motivated by military applications.
The sensor nodes in Wireless Sensor Network gather information from atmosphere and transmit it to a base station. Information sent by all the senor nodes in the network gathers at base station and from there this collected information is sent to the user through internet. Generally, the base station is more powerful in terms of resources than the sensor nodes. The sensor node is equipped with low-power batteries suitable for its small size, which limits the ability of the sensor node in terms of processing, storage and transmission.



                                                  

1.2 Applications of Wireless Sensor Networks
Currently wireless sensor networks are successfully used in different application domains. Some of major applications of wireless sensor networks are as follows:
·         Wireless Sensor network are used to monitor the environmental activities such as air pollution in atmosphere and water quantity under water.
·         Wireless sensor network are also used in military applications and in remote sensing applications such as sensing of nuclear, biological and chemical weapon and for detection of terrorist attacks.
·         Patient monitoring,
·         Real time traffic monitoring.
·         Industrial monitoring and agriculture.
1.3 Components of a Sensor Node
Devices in wireless sensor network can also be equipped with actuators to act upon certain conditions. Such types of networks are also referred as Wireless Sensor and Actuator Networks. Sensor node is the main part of wireless sensor network, a sensor node consist of different components. Each component is designed to perform a specific task. 

Processing Unit
In a sensor node processing unit controls the other components of sensor node and performs the required computations. Processing unit is attached with storage unit. Processor in a sensor node can operates in different modes like idle, active or sleep. These different modes are required for power saving purpose. Storage unit with processor is a memory chip attached with microcontroller. In a sensor node mostly flash memory is used because of its low cost and storage capacity. Memory requirements are application dependent.
Sensing Unit
Sensing unit is the main component of sensor node. Sensing unit measures the environmental conditions and physical parameters. Sensing unit produces the analog signal which contains the sensed data. ADC is also attached with sensing unit which converts the analog signal sensed by sensing unit to digital signals and the digitized data is transmitted to controller for further processing.
Transmission Unit
Transmission unit in sensor node consist a transceiver which is also known as radio. Transceiver can transmit and receive the data. A Sensor node uses transceiver to interact with base station and other sensor nodes in the network. Transceiver can be in different states during its operation such as transmit, receive, idle and sleep.
Power Unit
In wireless sensor networks power is supplied to sensor node by a battery attached with it. Sensor nodes have limited power therefore every operation perform by a sensor node should be energy efficient. Apart from the above components some extra components can be used with sensor nodes such as position finding system and power generator, it depends on application requirements


1.4 Characteristics of Wireless Sensor Network
Some important characteristics of wireless sensor network which affects the performance of wireless sensor network are as follows:
· Scalability and Dense Node Deployment: In a wireless sensor network sensor nodes are densely deployed in the area of interest for application. Nodes can be deployed either randomly or manually. Number of sensor nodes can be grow according to need of application and can be in the order of hundreds or thousands.
· Application Specific: Wireless sensor network is application dependent. A wireless sensor network is designed and deployed according to need of application.
· Battery Powered Nodes: In a wireless sensor network nodes are powered with battery. It is difficult to replace the battery or recharge the battery. In some applications external power generator can be used.
· Self Configurable Nature of Nodes: In a wireless sensor network sensor nodes can autonomously configure themselves during the communication in the network.
Node Failure: Once the nodes are deployed in the network then after some time a node may be damage or fail due to some reason for e.g. energy depletion.
1.5 Issues in Wireless Sensor Network
Wireless sensor network is really useful in different areas to achieve the desire objectives, but still there are some issues concerned with wireless sensor network that need to be solve for the better performance of the network. Some of these challenging issues in wireless sensor network are as follows:
·         Energy Consumption: Sensor nodes in wireless sensor network have limited energy capacity. Energy consumption in wireless sensor network depends on different operations performed by sensor nodes such as receiving and transmitting the data.  Energy constraint in sensor network is also affected by the development and design of hardware and software, routing protocol and architecture used in sensor networks. Several algorithms and protocols have been developed to minimize the energy consumption and make the network energy efficient.
·         Nodes Deployment:  Wireless sensor network consist of several nodes deployed either randomly or manually inside an area. Deployment of sensor nodes requires a handling of topology very carefully.  This deployment of nodes is either deterministic or self organizing. Sensor network topology is prone to frequent changes after deployment.  In dynamic wireless sensor network some additional sensor nodes can be added to the network at any time to replace the faulted node or due to any change in the task dynamic. Addition of new nodes needs reorganization of the network very carefully.
·         Production Cost: Since the sensor networks consist of large number of nodes and the cost of a single node is very important to justify the cost of overall network. Sensor nodes with advanced features are very costly. As a result cost of each sensor node has kept being low. Wireless sensor network also consist of some additional components so keeping the cost low is a challenging task.
·         Failure Tolerance: Sensor nodes fail due to some hardware problems or physical damage and energy depletion. Nodes failure in wireless sensor network is higher as compare to wired network. Protocol used in wireless sensor network should be able to detect the node failure as soon as possible and should be robust to handle the failure with maintaining the working of network.
·         Hardware Constraints: Generally a sensor node has sensing unit, power unit, processing unit and transmission unit. In some application for extra functionality there is requirement of some extra hardware components which may increase the cost of deployment, energy consumption and size of sensor node.
·         Security: Maintaining the security of data sensed by sensor nodes is another challenge in wireless sensor network. Data may be captured during the transmission from sensor node to base station.


·         Compression and Aggregation: Data compression and aggregation are the techniques to increase the quality of data and reduce the data size. Developing energy efficient compression and aggregation techniques in wireless sensor networks is a challenging task.


COMMENTS

Name

addressing modes types,1,advance-java,2,advancejava,1,aktu entrance exam,1,aktu exam schedule,1,ASP,1,bare machine,1,base register and limit register,1,Basic Computer network questions,1,C Programming,15,C Plus Plus,1,C Programming,2,C Programming MCQ,2,C Programming Questions,2,C programming study material for gate exam,13,Cache Memory,1,CBNST Program,1,Childcare,1,CJ,2,Cloud Computing,1,COA GATE Questions,1,components of use case diagram,1,Computer Architecture,2,Computer architecture based questions for gate exam,11,Computer Network,3,Computer Network Study Material,4,Computer network study material for gate,2,Computer Networks,7,Computer Science Study Material for Gate,20,computer science study material for gate exam,36,content based image retrieval content based image retrieval system,1,contiguous memory allocation,2,Core Java,8,COre Java Interview Questions,1,core java interviews questions,1,cyber crime report,1,Cyber crime status,1,cybercrime and security,1,cybercrime examples,1,Data link Layer Questions,1,Data Mining,1,Data Structure Questions,1,Data Transmission Architecture,1,Data Transmission in wsn,1,DBMS,4,dbms question paper,1,DE,1,Digital Electronics,1,DS,1,dynamic linking,1,dynamic linking in memory management,1,Electroencephalogram,1,File Handling,1,file management in operating system notes,1,FOC,1,Fundamenatl of Computer,1,Gate 2017,5,Gate 2017 Admit card,1,Gate 2017 Exam Schedule,1,Gate 2017 Syllabus,1,gate 2018,1,gate cse study material,1,gate practice set,10,gate study material for computer science,18,Gate study material for computer science 2017,1,GatePreviousYear,1,General,3,HCL Aptitude Test,1,HR Interview Questions,1,HTML,1,Image Processing,1,Important Date of Gate 2017 Exam,1,Information Security Policy,1,internal and external fragmentation,1,JS,1,lagrange's interpolation formula,1,lagrange's interpolation formula examples,1,Looping in C,1,MComputing,1,memory fragmentation,1,memory management,1,memory management questions and answer in os,1,Motivational,4,NCER,2,Numerical Techniques Lab,1,OOT,1,Operating System,12,Operating System Gate Questions,1,Operating System Objective Questions,4,Operating System Questions Bank,1,Operating system questions for gate,1,Operating System Study material,2,operating system study material for gate exam,16,Operating system tutorial,2,page swapping,1,paged memory allocation,1,paged memory allocation in operating system,1,paging technique of memory management .paging technique,1,paging technique of memory management program in c,1,Pointer in C,5,Process based question for gate,1,Quiz on non conventional energy resources,1,Regression testing,1,relocation in memory management,1,relocation registe,1,relocation register,1,resident monitor,1,resident monitor in operating system,1,routing table,1,segmentation in memory management,1,segmentation in memory management in operating system,1,Servlet,1,session tracking,1,session tracking in java,1,session tracking in servlet,1,Software Engineering,10,Software Engineering baes study material for gate,1,software engineering interview questions,1,Software Quality Assurance,3,software verification methods,1,SPM,1,Structure in C,1,Study Material for gate Computer Science,11,swapping in memory management,1,swapping in operating system,1,TCS Code Vita,1,TCS Interview Questions,1,Technical Interview,1,Technical Questions from DBMS,1,Thrashing in Operating System,1,Threads concept in operating system,1,Tips to Learn Coding,1,Top 30 Core Java Interview Questions with Answer,2,top down approach,1,top down approach in programming,1,Types of operating system,1,UML,1,use case diagram explanation,1,website uses cookies,1,what is cookies website,1,What is process control block ?,1,what is software testing?,1,Wireless Sensor Network,3,worst fit algorithm for memory allocation,1,XML,1,
ltr
item
Computer Science Junction: Introduction to Wireless Sensor Network
Introduction to Wireless Sensor Network
Wireless Sensor Network Introduction,Characteristics of wireless Sensor network, issues of wireless Sensor network,Issues in Wireless Sensor Network, Characteristics of Wireless Sensor Network,Components of a Sensor Node
https://4.bp.blogspot.com/-xny6pajE5iA/VnpmUMowHnI/AAAAAAAAAG0/GTx-8d4wUYY/s320/Wireless_Sensor_Network_Introduction.png
https://4.bp.blogspot.com/-xny6pajE5iA/VnpmUMowHnI/AAAAAAAAAG0/GTx-8d4wUYY/s72-c/Wireless_Sensor_Network_Introduction.png
Computer Science Junction
https://www.computersciencejunction.in/2015/12/wireless-sensor-network-introduction.html
https://www.computersciencejunction.in/
https://www.computersciencejunction.in/
https://www.computersciencejunction.in/2015/12/wireless-sensor-network-introduction.html
true
425357657003182083
UTF-8
Loaded All Posts Not found any posts VIEW ALL Readmore Reply Cancel reply Delete By Home PAGES POSTS View All RECOMMENDED FOR YOU LABEL ARCHIVE SEARCH ALL POSTS Not found any post match with your request Back Home Sunday Monday Tuesday Wednesday Thursday Friday Saturday Sun Mon Tue Wed Thu Fri Sat January February March April May June July August September October November December Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec just now 1 minute ago $$1$$ minutes ago 1 hour ago $$1$$ hours ago Yesterday $$1$$ days ago $$1$$ weeks ago more than 5 weeks ago Followers Follow THIS PREMIUM CONTENT IS LOCKED STEP 1: Share. STEP 2: Click the link you shared to unlock Copy All Code Select All Code All codes were copied to your clipboard Can not copy the codes / texts, please press [CTRL]+[C] (or CMD+C with Mac) to copy