earticle

영어

In this paper, we propose a location estimating algorithm for a remotely controlled robot with a sensor node using a wireless sensor network, named RDV-HOP. The proposed algorithm is based on, and improves the DV-HOP algorithm, which estimates the location by counting the number of hops between the sensor nodes. The RDV-HOP separates the Estimative Distance (ED) from Non-Estimative Distance (NED) based on the Received Signal Strength Indication (RSSI) scheme, and locates the robot with the RSSI if the robot is in the ED, or locates the robot with the number of hops if the robot is in the NED. A simulation of the RDV-HOP algorithm is performed by applying various environments as its model. When the effective distance is in a range of 40~80%, it shows the largest performance improvement in location errors. The proposed RDV-HOP algorithm decreases the distance error of 121.89% maximum when compared to the DV-HOP.