| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a control signal transmission apparatus for a duplex transmission system, capable of securing real-time transmission while suppressing a hardware scale, and to provide a transmission control method.SOLUTION: When a packet is not received for one minute, a section ID buffer 2112 and a period buffer 2113 are cleared, respective ID numbers of new received packets are stored in the section ID buffer 2112, a maximum value of ID numbers received in respective synchronous fields up to the second last synchronous field is stored in the period buffer 2113, and while regarding that ID numbers up to the maximum number stored in the second last synchronous field are continuously received, the section ID buffer 2112 is updated. When there is no coincident command by referring to the ID number of a packet received at present and the section ID buffer 2112, a command is determined as a newly received command, and when there is a coincident command, the command is disposed of as a received command.</p> |
