| 摘要 |
<P>PROBLEM TO BE SOLVED: To stably generate a transmission frequency regardless of a temperature change or a secular change by receiving the transmission frequency from a base station even in a mobile wireless device capable of communication by two modes of performing the communication through the base station and the communication with another mobile wireless device directly without interposing the base station. <P>SOLUTION: In the wireless communication system wherein the mobile wireless device has two communication modes of performing the communication by a frequency for base station communication with the base station when it is in the area of the base station and performing the communication by a frequency for direct communication with another mobile wireless device when it is out of the area of the base station, the base station transmits the frequency for the base station communication and the frequency for the direct communication at a prescribed interval, data indicating that it is transmission from the base station are included in transmission data by the frequency for the direct communication, and the mobile wireless device corrects the oscillation frequency of the mobile wireless device on the basis of the radio frequency in the case of receiving the frequency for the direct communication including the data indicating that it is transmitted from the base station. <P>COPYRIGHT: (C)2009,JPO&INPIT |
