Method and apparatus for location awareness of sensor nodes using transfer power in sensor network

摘要

The present invention provides a sensor network consisting of the sensor nodes and reference nodes, the transmission range adjustment technique and position mapping The technique is to recognize the relative position of the sensor node using. The transmission range control technique is the reference node receives the location information request from the sensor node, the transmission intensity varying its own position information refers to a technology for transmitting to the sensor node. And the mapping technique is the reference position of the coordinate values of the grid formed in the square shape consisting of nodes, to extract values contained in the common area of the transmission intensity by location area to which the reference signal reaches the node that sent the refers to a technique for determining a focus value of the coordinates to the location of the sensor nodes. Sensor nodes of the present invention transmits the location information request signal to the reference nodes as needed, and the reference node having received the signal transmits the own location information back to the sensor node after a random backoff time elapses. And the sensor node can then calculate the relative position and the error range of the sensor node using the location information received from the reference node.