Communication system and transmission apparatus

1. A communication system comprising:

a transmission apparatus configured to transmit data via a plurality of communication lines; and

a reception apparatus configured to receive the data from the transmission apparatus,

wherein the transmission apparatus includes processing circuitry configured to:

generate information regarding QoS of the plurality of communication lines, and

designate assignment of the data to communication lines of the plurality of communication lines on a basis of at least (i) the information regarding the QoS of the plurality of communication lines and (ii) assignment information indicating an assignment status of a data amount and a communication line transferred in the past,

wherein the transmission apparatus includes communication circuitry configured to allocate and transmit the data to the assigned communication lines of the plurality of communication lines on a basis of an instruction from the processing circuitry.

2. The communication system according to claim 1 , wherein the information regarding the QoS includes information indicating a communication rate of each of the communication lines of the plurality of communication lines.

3. The communication system according to claim 1 , wherein the information regarding the QoS includes an evaluation index that designates whether each communication line of the plurality of communication lines is available.

4. The communication system according to claim 1 , wherein the processing circuitry is configured to determine whether assignment of the data to each communication line of the plurality of communication lines is allowed on a basis of the information regarding the QoS.

5. The communication system according to claim 4 , wherein the processing circuitry is configured to resume assignment of the data to one of the communication lines of the plurality of communication lines, in which it is determined that assignment of the data is not allowed, on a basis of a result of multiplexing transmission of a packet to the one of the communication lines of the plurality of communication lines.

6. The communication system according to claim 5 , wherein the processing circuitry is configured to:

estimate a bandwidth of the one of the communication lines, in which it is determined that assignment of the data is not allowed, by multiplexing transmission of the packet, and

in response to a determination that the estimated bandwidth of the one of the communication lines exceeds a predetermined threshold value, resume assignment of the data to the one of the communication lines.

7. The communication system according to claim 1 , wherein in response to a determination that transmission of the data via a first communication line from the plurality of communication lines is not completed by a reproduction time of content included in the data in the reception apparatus, the processing circuitry is configured to determine whether transmission of the data via a second communication line of the plurality of communication lines is to be completed by the reproduction time of the content included in the data.

8. The communication system according to claim 7 , wherein in response to a determination that transmission of data via the second communication line is not to be completed by the reproduction time of the content included in the data, and transmission of a subset of packets in a packet group constituting one unit of the data is already completed, the processing circuitry is configured to instruct the communication circuitry to transmit all remaining packets of the packet group via the first communication line.

9. The communication system according to claim 8 , wherein in response to a determination that transmission of the subset of the packets in the packet group constituting the one unit of the data is not completed, the processing circuitry is configured to instruct the communication circuitry to delete the data.

10. The communication system according to claim 7 , wherein in response to a determination that transmission of data via the second communication line is to be completed by the reproduction time of the content included in the data, the processing circuitry is configured to instruct the communication circuitry to transmit the data via the second communication line.

11. The communication system according to claim 1 , wherein the processing circuitry is configured to designate assignment of the data to the plurality of communication lines on a basis of at least one of the information regarding QoS or the assignment information indicating the assignment status of the data to the plurality of communication lines.

12. The communication system according to claim 11 , wherein the assignment information further includes information indicating an assignment status of past data older than the data.

13. The communication system according to claim 1 , wherein

the processing circuitry is configured to determine whether retransmission of a subset of the data is necessary, and

the communication circuitry is configured to retransmit the subset of the data in response to a determination that the retransmission is necessary.

14. The communication system according to claim 13 , wherein the communication circuitry is configured to retransmit the subset of the data by switching the communication lines.

15. The communication system according to claim 14 , wherein the communication circuitry is configured to retransmit the subset of the data in parallel using the plurality of communication lines.

16. The communication system according to claim 1 , wherein the plurality of communication lines include a wireless communication line.

17. The communication system according to claim 1 , wherein content included in the data is moving image data.

18. The communication system according to claim 17 , wherein the transmission apparatus is configured as an imaging apparatus that captures a moving image as the content included in the data and transmits the captured moving image in real time.

19. A transmission apparatus communication system comprising:

processing circuitry configured to:

generate information regarding QoS of a plurality of communication lines, and

designate assignment of data to communication lines of the plurality of communication lines on a basis of at least (i) the information regarding the QoS of the plurality of communication lines and (ii) assignment information indicating an assignment status of a data amount and a communication line transferred in the past; and

communication circuitry configured to allocate and transmit the data to the assigned communication lines of the plurality of communication lines on a basis of an instruction from the processing circuitry.

20. A communication method performed in a transmission apparatus, comprising:

generating, by processing circuitry of the transmission apparatus, information regarding QoS of a plurality of communication lines;

designating, by the processing circuitry, assignment of data to communication lines of the plurality of communication lines on a basis of at least (i) the information regarding the QoS of the plurality of communication lines and (ii) assignment information indicating an assignment status of a data amount and a communication line transferred in the past; and

allocating and transmitting, by communication circuitry of the transmission apparatus, the data to the assigned communication lines of the plurality of communication lines on a basis of an instruction from the processing circuitry.