| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a communication system that is able to obtain information with a relatively large amount of data at a transmission unit while securing communication speed of a transmission signal at the transmission unit and the transmission unit used for the system. <P>SOLUTION: A transmission unit 1 transmits superimposition request data to a second monitor terminal 221 from a superimposition request unit 17 in the transmission band of a transmission signal. When the second monitor terminal 221 receives the superimposition request data, in response to it, the second monitor terminal 221 transmits monitoring data corresponding to monitoring input from a sensor device 9 as superimposition response data by a superimposition signal superimposed on the transmission signal to the transmission unit 1 in the response band of the transmission signal. When the transmission unit 1 receives the superimposition response data comprised of the monitoring data at a superimposition communication unit 16, the transmission unit 1 transmits control data to a second control terminal 222 or a first control terminal 212 associated with the monitoring data on a control table. <P>COPYRIGHT: (C)2013,JPO&INPIT |
