Energy level performances of data services in random WSN with Rayleigh fading

Energy level performances of two packet delivery schemes in random WSN (Wireless Sensor Networks) are evaluated in presence of Rayleigh fading. Two different information delivery mechanisms involving regenerative relays with or without error correcting capability are investigated. Energy consumption for successful delivery of a data packet for each mechanism is evaluated and compared under several conditions of node density, bit rate, transmit power and channel fading. Energy efficiencies of the above schemes in a random WSN are also evaluated. In a random network, an intermediate node in the route selects the nearest node within a sector of angle (called search angle) towards the direction of the destination as the next hop. The impact of search angle on energy consumption, energy efficiency and BER are also investigated. Further an optimal packet length based on energy efficiency is derived. Impact of optimal packet size on total energy expenditure is analyzed for each delivery scheme.