Energy Management in Wireless Sensor Networks: A State of Art

Recently, Wireless Sensor Networks (WSNs) have captured a lot of attention not in real life applications but in research also. They need to operate for a long duration without any human intervention. But the critical point of these networks is that the sensor nodes are battery powered. So power management is trending issue in WSN. In order to resolve this issue, firstly energy can be harvested from the ambient sources like solar, wind etc. Secondly, use of accumulated energy in an efficient manner. The accumulated energy can be stored in various energy storage systems. Further a lot of energy conservation techniques have been developed in the past. This paper assists as survey for the various renewable energy sources and storage systems for energy. Further, it presents a breakdown of various energy conservation schemes.