Rssi- and Lqi-based clustering: analysis and implementation of multihop EOP-LEACH for WSN using Sun SPOT

Network energy is the main constraint that affects the practical design of wireless sensor networks (WSNs) as the nodes have limited resource capabilities. This aticle presents a novel EOP-LEACH (Efficient Optimized Practical-LEACH) that is proposed to overcome limitations of conventional low energy adaptive clustering hierarchy (LEACH) protocol to improve the life time and reduce the energy consumption of the WSN. The proposed enhancement is achieved by inserting novel factors in the threshold equation of conventional LEACH in order to choose the optimum node to be Cluster Head (CH).. The novel proposed parameters to be inserted are the Received Signal Strength (RSSI) which is related to the communication pass distance and link quality indication (LQI) that reflect the effect of communication channel noise and interference. Multihop routing, based mainly on RSSI values of neighbor nodes, is another proposed improvement to conventional LEACH to decrease distance of transmission which leads to savings in network energy. The simulation of the proposed protocols was done using MATLAB software. Comparison between the performance of proposed protocols and conventional LEACH shows that the WSN performance is improved using the proposed protocols.