A smart location algorithm of wireless sensors

Accurate positions of some sensor nodes need to be calculated within wireless sensor network (WSN) in many applications, such as environmental monitoring system. This paper aims at the location method of sensor nodes in small scale WSN application scenarios; several kinds of traditional positioning methods are discussed. The main contribution of this work is to propose an algorithm based on the energy attenuation model with transmitting distance, and then design a communication frame for rapid positioning on the basis of ZigBee protocol stack correspondently. The algorithm is easily applied in small scale area networks. Its quality is verified in the actual environment, the result shows that the positioning accuracy is within 2 meters; the relative error is less than 3% in small scale area of open environment.