| 摘要 |
<p>A position information providing apparatus according to the embodiment of the present invention includes a signal transmitting unit which transmits a position information request signal to one or more node devices, a sound wave receiving unit which receives a sound wave signal including unique information transmitted through different channels from one or more node devices which receive the position information request signal, an electric wave receiving unit which receives an electric wave signal including the unique information transmitted through the different channels from one or more node devices which receive the position information request signal, and a control unit which calculates the position of a terminal based on one or more sound wave or electric wave signals which are received.</p> |
