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The Design Of A Wireless Sensor Network

740 words - 3 pages

The design of WSN includes various disciplines like database, query processing, networking, algorithms and distributed systems. The basic functionality of WSN generally depends on the applications but the following requirements are typical. I) determine the value of a parameter at a given location. II) Detect the occurrence of events of interest and estimate the parameters of the 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, ...view middle of the document...

The issues can be overcome by a) radio system design, b) antenna system design, c) signal / waveform design and d) building/environment design. II) Modulation: Spread Spectrum techniques have higher effective signal to noise ratio. Direct Sequence Spread Spectrum technique can be implemented for effective outcome. III) Available wireless technologies: The various standards in Section II can be used to broadly implement WSN.
Routing is an important concept and the design process is faced with many challenges. These challenges can be attributed to multiple factors including severe energy constraints, limited computing and communication capabilities, dynamically changing environment, unique data traffic models and application level quality of service requirement. Routing algorithms are classified according to the manner in which information is acquired and maintained and the manner in which this information is used to compute paths based on the acquired information. Three different strategies can be identified: proactive, reactive and hybrid. The proactive strategy relies on periodic dissemination of routing information to maintain consistent and accurate routing tables across all the nodes of the network. Reactive routing establishes routes to a limited set of destinations on demand. Hybrid strategies rely on the existence of network structure to achieve stability and scalability in large networks.
After the design, it is necessary to monitor the activities which will help overcome the design issues. The optimization of node...

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