Abstract: Indoor positioning is affected by the floor,wall,personnel ambulate,and is prone to multipath phenomenon to make case signal attenuate,so that the received signal strength (RSSI) algorithm can’t obtain high positioning accuracy．In order to improve positioning precision in the indoor environment,the paper used RSSI and centroid localization algorithm advantages to get a combination indoor sensor node localization method．Firstly,the destination node RSSI value was read by beacon nodes,and then the RSSI values were used as the weights of centroid localization algorithm,through the centroid algorithm the target node localization was obtained,and lastly,the test was carried out．The results show that the proposed algorithm has less calculation and high positioning precision,and it can well meet the requirements of indoor positioning.

Key words: Ceived signal strength,Indoor localization,Wireless sensor network,Centroid localization algorithm