| 摘要 |
<P>PROBLEM TO BE SOLVED: To maintain the transmission speed and transmission quality of prescribed data even when line quality is rapidly degraded. <P>SOLUTION: The radio communication device for communicating with another radio communication device through a main line and a spare line includes: a reception part for selecting one of the main line and the spare line on the basis of the line quality obtained from reception signals in the main line and performing reception; and a transmission part for modulating data signals by a first modulation system and transmitting them when the reception part selects the main line, and modulating the data signals by a second modulation system of multiplicity lower than that of the first modulation system and transmitting them when the reception part selects the spare line. <P>COPYRIGHT: (C)2010,JPO&INPIT |
