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A wireless sensor network (WSN) of spatially distributed autonomous sensor to monitor physical and environmental condition, such as temperature, sound, pressure etc. and to cooperatively pass their data through the network to a main location. The more modem network are bi-directional , also enabling control of the sensor activity. The development of wireless sensor network was motivate by military application such as battlefield surveillance. Today such network are used in many industrial and consumer application, such as industrial process monitoring and control, machine health monitoring and so on. hundreds or even thousands, where each node is connected

Figure 1 A wireless sensor network (WSN) of spatially distributed autonomous sensor to monitor physical and environmental condition, such as temperature, sound, pressure etc. and to cooperatively pass their data through the network to a main location. The more modem network are bi-directional , also enabling control of the sensor activity. The development of wireless sensor network was motivate by military application such as battlefield surveillance. Today such network are used in many industrial and consumer application, such as industrial process monitoring and control, machine health monitoring and so on. hundreds or even thousands, where each node is connected

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In these, sensor nodes are buried underground or in a cave or mine that monitors the underground conditions. Sink nodes are deployed above the ground to forward the gathered information from the sensor nodes to the base station. These are more expensive than the terrestrial sensor networks because proper nodes are to be selected that can assure reliable communication through soil, rock, water and other mineral contents. [2]
In these, sensor nodes are buried underground or in a cave or mine that monitors the underground conditions. Sink nodes are deployed above the ground to forward the gathered information from the sensor nodes to the base station. These are more expensive than the terrestrial sensor networks because proper nodes are to be selected that can assure reliable communication through soil, rock, water and other mineral contents. [2]
In these, sensor nodes and vehicles are located underwater. Autonomous vehicles are used for gathering the data from the sensor nodes. Sparse deployment of nodes is done in this network. Main problems that come under this while communicating are limited bandwidth, long propagation delay and signal fading issue.[2]
In these, sensor nodes and vehicles are located underwater. Autonomous vehicles are used for gathering the data from the sensor nodes. Sparse deployment of nodes is done in this network. Main problems that come under this while communicating are limited bandwidth, long propagation delay and signal fading issue.[2]
In these, low cost sensor nodes are equipped with cameras and microphones. These nodes are located in a pre-planned manner to guarantee coverage. Issues in these networks are demand of high bandwidth, high energy consumption, quality of service provisioning, data processing and compression techniques, and cross layer design. [2]
In these, low cost sensor nodes are equipped with cameras and microphones. These nodes are located in a pre-planned manner to guarantee coverage. Issues in these networks are demand of high bandwidth, high energy consumption, quality of service provisioning, data processing and compression techniques, and cross layer design. [2]
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