| 摘要 |
<p>An object of the present invention is to provide a base station that can expand a position information providing service in the closed range of a single cell. The base station stores the transmission time in a transmission time storing part, calculates the RTT in an RTT calculating part , employing a received signal from a mobile station, and calculates the distance from a calculated time stamp in a distance measuring part. The base station calculates a fading correlation value employing a channel estimated value in a channel estimate calculating part, after the demodulation of DPCCH is completed in a DPCCH demodulating part, performs a speed calculating process in a speed calculating part, and performs a travel direction estimating process in a travel direction estimating part from the percentages of '0' and '1' in a bit string. If the base station estimates the distance, speed and travel direction, the optimal position information to be transmitted to the mobile station is decided in a transmission position information deciding part, employing a table within the transmission position information deciding part.</p> |
