An improved DV-Hop algorithm based on RSSI for WSN

In order to solve the problem of poor localization accuracy of DV-Hop algorithm, an improved DV-Hop algorithm is proposed in this paper. The proposed algorithm is based on RSSI technology to modify the hop count between nodes. The concept of basic signal strength of node which will be used to modify hop count is proposed in this paper. The hop coefficient and hopsize coefficient are set up to modify hop count and hop size of unknown nodes respectively. In addition, the packet life cycle is put forward to limit the transmission distance of network data packets. The simulation result shows that the proposed algorithm has better localization accuracy and can reduce the estimation error of hop count and hop size between nodes significantly.