Enhancing the network lifetime of cooperative wireless sensor networks using energy harvesting technique

Wireless Sensor Networks (WSN) consists of a large number of miniature size, low-power, smart sensor nodes interfacing with one another and deployed over a certain inaccessible geographical locale having inadequate power and storage space. Energy efficiency is a foremost concern in WSN. To maximize the network lifetime, one possible solution is to harvest energy from the ambient boundless accessible energy sources in the environment nearby to the sensor nodes. The use of energy harvesting (EH) nodes as cooperative relays is a promising and budding solution in WSN. Energy harvest from one source is not sufficient to congregate the power requirement of sensor nodes. In this work, in order to improve the network lifetime electromagnetic radiation energy harvesting (EMR EH) method has been proposed. Communication is carried out by signal cooperation through relays in order to assist the sources to exchange their data for longer time periods. The current slot´s transmission is based on transmitter knowledge about the present channel signal to noise ratio (SNR), past harvested energy and present energy stored in the battery. In order to solve the low power problem while maximizing the lifetime of wireless sensor nodes power management schemes like water filling energy harvesting strategies is included. The network performance metrics such as the probability of successful data exchange and the network lifetime gain has been derived and simulated using MATLAB. Simulations results illustrate that proposed technique afford enhanced result compared to existing energy harvesting schemes.