Optimized Cooperative LEACH MISO in Wireless Sensor Networks

Abstract

Abstract-- In long range communications of wireless sensor networks (WSN), the most crucial issue is the data reliability. Data reliability is mostly affected by fading. Cooperative MISO (Multiple Input Single Output) is a variant of MIMO (Multiple Input Multiple Output). In this paper we propose an optimized cooperative LEACH (Low-Energy Adaptive Clustering Hierarchy) MISO model where sensors using Alamouti diversity schemes take part in cooperative communication. Sensors are responsible for sensing the environment, data gathering, data compression and cooperative communication. Cluster head cooperates with the nearby sensors to cooperatively communicate with other cluster heads and the sink. The basic aim of this model is to achieve longer life time of WSN along with less energy consumption. This paper also aims at achieving uniform death of the sensors. MIMO helps in long range inter-sensor communication and sensor-sink communication. It has been compared with an existing Cluster Head Cooperative LEACH MIMO model and simulation results prove that the proposed model is more efficient in terms of WSN life-time as well as energy conservation. This paper also represents an optimized model of a previous work which uses mobility