10-02-2010, 11:24 AM
Underwater Wireless Sensor Networks
Introduction
The underwater use of sensors and sensor networks has been quite limited due to the harsh environment and associated high costs.The challenges for designing underwater wireless sensor systems include power consumption, reliability of communication links, network routing protocol, distributed localization and time synchronization. Underwater Wireless Sensor Network (UWSN) is incresingly becoming important because of its applications in aquatic environments such as
lakes, ponds, rivers, and oceans.Fields like include environmental monitoring and data collection, disaster early warning, tactical surveillance, military target detection, unmanned off-shore exploration, and underwater construction can benefit from UWSN. acoustic communication channels and the mobility of sensor
nodes are the differentiating factor from land based counterparts. acoustic channels are taken as the sole means for communications among underwater
sensor nodes as RF don't propagate in water well.
Challenges in UWSN system designs
a)Workload characterization:
A typical underwater sensor node consists of a
sensor probe, an acoustic modem, a controller, storage,
battery, and an interface circuitry that connects all the
components with the controller.They need different designs of their components
because of the unique properties of underwater
environments and the distinct requirements of aquatic
applications. for example long-term
environment monitoring require little computational
capability, large storage whereas while short-term target detection applications demand
more computational capability and real-time response.
b)Energy-efficient node design and resource
management:
limited energy
resources on individual sensor nodes is a constraint. The power is a factor because acoustic communications will consume
more energy than RF channels, and 2) energy
harvesting is much more difficult. due to the
dynamic nature of UWSNs, network configuration
algorithms have to run periodically . energyefficient
configuration algorithms are needed. For example, the microcontroller in a
sensor node can go to the sleep mode during idle time
and wake up to the active mode when necessary. proper assignments of tasks to components and
the energy-efficient implementations of the components can lengthen operating times.
c)Lifetime estimation
certain
design parameters, such as density of sensor nodes and
battery capacity, at the design time are done by the estimated lifetime of the sensor node. analytical method and model which coarsely
captures the behavior of underwater sensor networks is needed for this.
report:
[attachment=1902]
Hey, visit this thread for your topic:
http://studentbank.in/report-ultimedia-b...rvice-MBMS
Introduction
The underwater use of sensors and sensor networks has been quite limited due to the harsh environment and associated high costs.The challenges for designing underwater wireless sensor systems include power consumption, reliability of communication links, network routing protocol, distributed localization and time synchronization. Underwater Wireless Sensor Network (UWSN) is incresingly becoming important because of its applications in aquatic environments such as
lakes, ponds, rivers, and oceans.Fields like include environmental monitoring and data collection, disaster early warning, tactical surveillance, military target detection, unmanned off-shore exploration, and underwater construction can benefit from UWSN. acoustic communication channels and the mobility of sensor
nodes are the differentiating factor from land based counterparts. acoustic channels are taken as the sole means for communications among underwater
sensor nodes as RF don't propagate in water well.
Challenges in UWSN system designs
a)Workload characterization:
A typical underwater sensor node consists of a
sensor probe, an acoustic modem, a controller, storage,
battery, and an interface circuitry that connects all the
components with the controller.They need different designs of their components
because of the unique properties of underwater
environments and the distinct requirements of aquatic
applications. for example long-term
environment monitoring require little computational
capability, large storage whereas while short-term target detection applications demand
more computational capability and real-time response.
b)Energy-efficient node design and resource
management:
limited energy
resources on individual sensor nodes is a constraint. The power is a factor because acoustic communications will consume
more energy than RF channels, and 2) energy
harvesting is much more difficult. due to the
dynamic nature of UWSNs, network configuration
algorithms have to run periodically . energyefficient
configuration algorithms are needed. For example, the microcontroller in a
sensor node can go to the sleep mode during idle time
and wake up to the active mode when necessary. proper assignments of tasks to components and
the energy-efficient implementations of the components can lengthen operating times.
c)Lifetime estimation
certain
design parameters, such as density of sensor nodes and
battery capacity, at the design time are done by the estimated lifetime of the sensor node. analytical method and model which coarsely
captures the behavior of underwater sensor networks is needed for this.
report:
[attachment=1902]
Hey, visit this thread for your topic:
http://studentbank.in/report-ultimedia-b...rvice-MBMS
