Maximizing Communication Reliabilty in Wsn by Introducing Mimo Technology

Abstract

Wireless sensor networks (WSN) is a very important and exciting new technology with great potential for several current applications in medication, transportation, agriculture, industrial process control, and also the military as well as creating new revolutionary systems in areas like global-scale environmental monitoring, precision agriculture, home and assisted living medical care, smart buildings and cities, and numerous future military applications. In fact, it is difficult to consider any major application area that cannot benefit from WSN technology. Typically, WSN are composed of enormous numbers of minimal capacity sensing, computing, and communicating devices and various sort of actuators. To date, analysis and real-world implementations have made several wonderful low level mechanisms and protocols to gather, transport, perform sensor fusion of this data and react with control actions. In the harsh working environments, channel fading, interference, and radio irregularity further pose challenges on the design of such scheme. Our focus is on reliable data transmission WSNs. As multiple-input–multiple-output (MIMO) technology has the potential to dramatically increase the reliability or reduce transmission energy consumption in fading channels, So for reliable communication in WSN MIMO technology is a possible option. But applying multiple antenna techniques directly to sensor network is impractical because of the limited size of a sensor node usually supports a single antenna. So the MIMO transmission in wireless sensor networks must be operated in a cooperative way, which means multiple sensor nodes with single-antenna in each of them, form MIMO link.