| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a means which automatically decides message transmission times and performs transmissions according to change of radio quality. Ž<P>SOLUTION: A base station has a radio quality measurement unit which measures radio quality between the base station itself and a terminal, and a message transmitting/receiving unit which has a function to transmit messages multiple times according to the radio quality. The message transmitting/receiving unit analyzes the radio quality using the data measured by the radio quality measurement unit, and calculates transmission times of the messages. Moreover, upon transmitting messages multiple times, it transmits making sequence numbers in headers attached to the messages as the same. The radio quality measurement unit measures radio wave quality itself between the terminal and the base station, or data necessary for deciding the quality of the radio wave, and transmits the data to the message transmitting/receiving unit. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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