Under Water Acoustic Sensor Networks In Under Water Wireless Communication
- Created: Sunday, 23 June 2013 10:59
- Last Updated: Saturday, 29 June 2013 13:37
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New Electronics and Communication Seminar Topic on Under Water Acoustic Sensor Networks In Under Water Wireless Communication. There has been a growing interest in monitoring underwater mediums for scientific exploration, commercial exploitation, and attack protection as it contributes for human well being.
Industries are increasingly interested in technologies like wireless sensor networks. Under water sensor network consists of a variable number of sensors and vehicles that are deployed to perform collaborative monitoring tasks over a given area. Efficient information exchange via wireless communication using physical waves as the carrier among nodes in an underwater sensor network.
Communication method:Terrestrial sensor networks employ electromagnetic waves but in underwater network is relied on physical means like acoustic sounds to transmit the signal.
Protocols:Due to distinct network dynamics, existing communication protocols for terrestrial networks are not suitable for underwater environment.
Cost:Terrestrial networks are becoming inexpensive but underwater sensors are still expensive devices.
Deployment:While terrestrial sensor networks are densely deployed, in underwater, the deployment is generally more sparse.
Power:The power needed for acoustic underwater communications is higher than in terrestrial radio communications.
Memory:Underwater sensors need to have large memory compared to terrestrial sensors.
Node Mobility:In case of terrestrial networks nodes mobility can be predicted whereas in the underwater
networks prediction of mobility of the node is difficult.
Spatial Correlation:Readings taken from terrestrial networks with sensors are often correlated but this is not the case in underwater networks.
Communication media:Acoustic communication is the most versatile and widely used technique in underwater due to low attenuation in water. Transmission loss:The attenuation is mainly provoked by
absorption due to conversion of acoustic energy into heat. The geometric spreading refers to the spreading of sound energy as a result of the expansion of the wave fronts.
Please go through the attached presentation for more info.