Abstract
In most wireless sensor network (WSN) engineering applications, the position of the sensor node needs to be determined. This paper uses mobile beacon nodes to determine a sensor node localization scheme. The multi-modal method is employed to move the beacon node through GPS to determine the coordinates of the broadcast time tag and coordinate information, and through WSN sound pulse sensor nodes at the same time to check whether the beacon messages and sound pulse, measuring the time delay between voice and radio pulses, then used the minimum time delay between voice and radio pulses of the y-coordinate as a beacon message x-coordinate. According to the ID of the beacon node antenna, our method can accurately estimate the position of the sensor. Error analysis and computer simulation show that the positioning scheme, called DAMS, is robust to various parameters of WSN and is not affected by the obstacle environment.
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