| 摘要 |
It is an object of the present invention to implement stabilized wireless communications by establishing suitable channel switching conditions for a digital wireless communication device that performs wireless communications with a single base station. In order to achieve this object, the cordless phone child device according to the present invention comprises a wireless unit that sends and receives a wireless signal to and from the base station; a frame extractor that extracts frames from the wireless signal; a frame error rate computation unit that computes the frame error rate; a counter that counts the number of frames in which a frame error occurs and for which the received signal intensity exceeds a predetermined threshold value; and a channel switching judgment unit that judges that the channel switching conditions have been fulfilled when the frame error rate computed by the frame error rate computation unit is equal to or more than a predetermined threshold value and the number of frames counted by the counter is equal to or more than a predetermined threshold value.
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