| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a network system which can enhance communication efficiency by reducing wasteful retransmission requests. SOLUTION: When a first frame to a display unit 12 connected to a bus 14 is transmitted from each unit such as a disc changer 5, an amplifier unit 6 or the like on a bus 13, an operation unit 1, on the basis of information contained in this frame, generates a second frame by adding a secondary ID as identification information to specify each unit connected to the bus 13 and transmits it on a bus 14 to a display unit 12. The display unit 12, on the basis of the secondary ID contained in the second frame, identifies which unit connected to the bus 13 is the transmission source.</p> |
