Estimating Node Density for Redundant Sensors in Wireless Sensor Network
نویسندگان
چکیده
A Wireless Sensor Network (WSN) is a collaboration of a large number of sensor nodes. The sensor node operates on small batteries with limited lifetime. Some sensors, acting as source nodes, transmit their sensed data to a sink node via multi-hop communication. Often nodes nearer to the sink expend more energy than the nodes farther from the sink. Therefore, it is highly desirable to have an efficient sensor node distribution. The sensor nodes are often deployed in remote geographical locations or hazardous environment, where the replacement of batteries is very difficult and expensive. Therefore the prime consideration in WSN is to prolong the battery lifetime by efficient utilization. It is observed that the energy spent in routing data is about 80% of the total energy in the network while the remaining energy is used in sensing and other operations. Hence, various schemes were proposed in the past for energy efficient data routing, data aggregation, query processing etc. in a WSN.
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