Transmission system, transmitting apparatus, receiving apparatus, and data transmission method

A transmitting apparatus for receiving client data transmitted from a client device and transmitting the received client data to a receiving apparatus, the transmitting apparatus comprising:

• a buffer configured to store the client data transmitted from the client device;
• and
• a control circuit configured to control a timing of outputting the client data from the buffer to transmit the client data to the receiving apparatus, wherein
• the transmitting apparatus is configured to, after transmitting first client data output from the buffer to the receiving apparatus, transmit a management frame and waiting time information, the management frame being used for management of a transmission system including the transmitting apparatus and the receiving apparatus,
• the control circuit is configured to wait for second client data to be output from the buffer until the transmitting apparatus completes transmission of the management frame and the waiting time information, and cause the buffer to output the second client data after the transmitting apparatus completes transmission of the management frame and the waiting time information, and
• the waiting time information is information based on a waiting time, the waiting time being a time of waiting for the second client data to be output from the buffer.

A receiving apparatus for receiving client data transmitted from a transmitting apparatus and transmitting the received client data to a client device, the receiving apparatus comprising:

• a second buffer configured to store the client data transmitted from the transmitting apparatus;
• and
• a control circuit configured to control a timing of outputting the client data from the second buffer to transmit the client data to the client device, wherein
• the receiving apparatus is configured to, after receiving first client data transmitted from the transmitting apparatus, receive a management frame and waiting time information transmitted from the transmitting apparatus, the management frame being used for management of a transmission system including the transmitting apparatus and the receiving apparatus, and further receive second client data transmitted from the transmitting apparatus after receiving the management frame and the waiting time information,
• the waiting time information is information based on a waiting time, the waiting time being a time of waiting for the second client data to be output from a first buffer included in the transmitting apparatus to transmit the management frame and the waiting time information from the transmitting apparatus,
• the control circuit is configured to determine an output start timing at which output of the second client data from the second buffer starts, based on the waiting time information, and cause the second buffer to start the output of the second client data at the determined output start timing, and
• the output start timing is a timing at which a time shorter than a data reception interval elapses from completion of output of the first client data from the second buffer, the data reception interval being a time from completion of reception of the first client data by the receiving apparatus to start of reception of the second client data by the receiving apparatus.

A data transmission method in a transmission system including a transmitting apparatus and a receiving apparatus, the data transmission method comprising:

• by the transmitting apparatus, inputting first client data received from a first client device to a first buffer, and after transmitting the first client data output from the first buffer to the receiving apparatus, transmitting a management frame and waiting time information, the management frame being used for management of the transmission system;
• by the transmitting apparatus, waiting for second client data to be output from the first buffer until the transmitting apparatus completes transmission of the management frame and the waiting time information, causing the first buffer to output the second client data after the transmitting apparatus completes transmission of the management frame and the waiting time information, and transmitting the second client data output from the first buffer to the receiving apparatus;
• by the receiving apparatus, receiving the management frame, the waiting time information, and the second client data transmitted from the transmitting apparatus, and inputting the received second client data to a second buffer;
• and
• by the receiving apparatus, determining an output start timing at which output of the second client data from the second buffer starts, based on the waiting time information, causing the second buffer to start an output of the second client data at the determined output start timing, and transmitting the second client data output from the second buffer to a second client device, wherein
• the waiting time information is information based on a waiting time, the waiting time being a time of waiting for the second client data to be output from the first buffer, and
• the output start timing is a timing at which a time shorter than a data reception interval elapses from completion of output of the first client data from the second buffer, the data reception interval being a time from completion of reception of the first client data by the receiving apparatus to start of reception of the second client data by the receiving apparatus.