| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a radio communication system capable of allowing a base station to measure electric field intensity, based on a signal to be received from a mobile station. <P>SOLUTION: A base station 200 includes: a communication controller 203 for outputting to a subtractor 204, an LID (a link address field) 414 of an ACTC (an activation channel) frame 410 to be received from a mobile station 100, and at the same time, outputting a PR (preamble signal) 411 of the ACTC frame 410 to an electric field intensity detector 206; the subtractor 204 for taking out the counter number of vehicle speed pulses from an MPC (vehicle speed pulse count) 414c of the LID 414, and outputting it to a vehicle speed pulse position detector 205; the vehicle speed pulse position detector 205 for detecting the position of the mobile station 100, based on the counter number of the vehicle speed pulses, and outputting it to a position information and electric field intensity information storage device 207; and the electric field intensity detector 206 for detecting electric field intensity from the PR 411, and outputting it to the position information and electric field intensity information storage device 207. <P>COPYRIGHT: (C)2012,JPO&INPIT |
