An Effective Organizing Method for Wireless Sensor Networks Based on MIMO

In wireless sensor network (WSN), one of the most critical issues is to minimize the energy consumption. The use of cooperative multiple-input multiple-output (MIMO) communication can save a lot of transmission energy. However, how to organize the WSN based on MIMO remains a critical challenge. In this paper, a novel clustering-CH-exchange-method (CCEM) is proposed to apply cooperative MIMO in WSN. CCEM firstly selects some cluster heads (CHs) and partitions the network into clusters. Then the CH in each cluster finds cooperative nodes to form MIMO antennas. The CH exchange operation runs if CH can´t find enough cooperative nodes. The energy consumption of the network is developed. Simulation results show that CCEM provides high success probability of forming complete MIMO overlay network and significant energy efficiencies.