ENERGY HARVESTING IN CWSNS VIA OPTIMAL TRANSMISSION RANGES WITH GUARANTEE DELIVERED FOR NETWORK'S DATA

Today, the mechanism of Clustering Wireless Sensor Networks (known as CWSNs) is one of the most important technologies used to harvest energy in network' sensors that are limited in energy resources due to their use of small non-rechargeable batteries with short lifetime, so the energy consumption in these networks that is a result of the continue processes for sensing, processing, switching , receiving and sending data will lead to an early network death. In CWSNs, the number of transmissions and its ranges are reduced by making the ordinary sensors of each group ( Cluster) send its data only to its Cluster leader ( Cluster Head or CH) , who is the only one responsible for receiving these data and then insuring connectivity to the network's data by sending it to the Base Station ( BS) or to the closer CH to him and to that station at the same time. In this paper, the transmission range algorithm in [1] has been improved by reducing the area research for next hop towards the BS or gateway to obtain the lower ranges to transmit network data for various node density and saving about 15% of the network's energy more than main approach in [1]. This will extend the CWSN's lifetime and improve its throughput.