| 摘要 |
<p>PROBLEM TO BE SOLVED: To enable the same user to efficiently transmit pieces of information data having different transmission conditions through transmission lines of the same bandwidth by multiplexing them with respect to channels for multimedia communication. SOLUTION: This device is equipped with a circuit which calculates a signal- to-interference-noise power ratio as to one or more channels of a reception part and a circuit which decides a return transmission channel multi-valued multiplex number with the calculated value, and adds return transmission channel multi-valued multiplex number specification information 116 as the decision result to transmit data and sends them to an opposite station. A transmission part sets the channel multiplex number of transmit information data and the modulation multi-valued numbers of data modulation and spread modulation of respective channels, packet by packet, according to the transmission channel multi-valued multiplex number specification information 124 received from the opposite station and performs multiplex transmission as the same user channel.</p> |
