Abstract: Aiming at the problem that there were many block obstacles to communication between blocking nodes in the actual application environment, so that the communication between nodes became non lineofsight (NLOS) type, we proposed a kind of NLOS mobile node localization algorithm based on
 error prior knowledge. The algorithm first calculated the number of NLOS measurements with errors in the total number of percentage K according to the error prior knowledge. And then according to the K to select the larger measured value of error. Finally, the NLOS measured value with larger error was corrected. The simulation results show that, compared with the traditional mobile node localization algorithm, the proposed algorithm can effectively reduce the NLOS error and improve the node localization accuracy.

Key words: node localization, non lineofsight error, wireless sensor networks, node location information