| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a communication system without needing a conventional loop-back function, and to provide a communication test method thereof. <P>SOLUTION: In the communication system, a first communication device 20A creates a first special frame 300A to which an identifier is attached for identifying that the frame is a test frame, and transmits the first special frame 300A to a second communication device 20B while a data communication frame is transmitted. The second communication device 20B determines on the basis of the identifier whether or not the frame received from the first communication device 20A is the first special frame 300A, creates a second special frame 300B to which an identifier is attached, and transmits the second special frame 300B to the first communication device 20A while a data communication frame is transmitted. The first communication device 20A determines on the basis of the identifier whether or not the frame received from the second communication device 20B is the second special frame 300B, thereby determining a status of communication between the first communication device 20A and the second communication device 20B. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
