Computer Networks Wireless Sensor Networks
Category : Tutorials » Computer Networking
Network. Link Layer. Physical Layer. our focus. 2. What are sensor networks? • Put simply, . over shared wireless channel (critical in dense networks) .
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What are sensor networks? • Put simply, – Sensing, Computing, and Communications • They connect us to the physical world around us • They represent a new frontier in computer networks. Wireless radio channel • Shares spectrum with other (interfering) transmitters• Low power, low range, low bandwidth• High error rates• Medium is susceptible to noise, interference, blockage and multipath and these channel impediments are time-varying • These random variations distort and diminish the received signal due to physical and environmental factors non-existent in wireline communications • multipath fading, noise and attenuation issues
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