A DV-HOP Algorithm Based on the Ratio between Node RSSI and the Critical RSSI Hop Correction and Hop Distance Revaluation
Fang Wang-shen · Chuangan jishu xuebao · 2015
Traditional DV-Hop algorithm can cause greater positioning errors,To overcome such problem,this pa-per presents a improved algorithm which based on the ratio between node RSSI and the critical RSSI hop count cor-rection and hop distance revaluation. Firstly,we take the ratio of node RSSI and the critical RSSI to modify hops,and the correction hops will be attained;then the average hop distance will be corrected through weighted combina-tion of triangle. Finally,compared the hop distance with communication radius,the maximum and minimum hop dis-tance will not be applied to calculate,According to the above,we will get the average distance per hop by calculat-ing the average value among the remaining jump distance. The simulation results show that under the same networkenvironment,compared with the classic DV-Hop algorithm,this proposed algorithm requires only node communica-tion chips with RSSI indicator and does not require additional hardware overhead,can effectively reduce the loca-tion error;compared with other DV-Hop correction algorithm,this algorithm also has the advantage of reducing thelocation error.