Communication system and transmission apparatus
The present technology relates to a communication system and a transmission apparatus that enable highly reliable streaming using a plurality of wireless communication lines. In a transmission apparatus, a QoS module generates information regarding QoS of a plurality of communication lines, a load balancer designates assignment of data to the communication lines on the basis at least of the information regarding QoS, and a caster allocates and transmits the data to the assigned communication lines on the basis of an instruction from the QoS module. The present technology can be applied to a communication system that performs streaming by UDP.
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) a reproduction time of content included in the data, and
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 the reproduction time of the 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 assignment information indicating an assignment status of the data to the plurality of communication lines.
12. The communication system according to claim 11 , wherein
the assignment information includes information indicating an assignment status of a piece of the data having a larger data amount than other pieces of the data.
13. The communication system according to claim 12 , wherein
the assignment information includes information indicating an assignment status of past data older than the data.
14. 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.
15. The communication system according to claim 14 , wherein
the communication circuitry is configured to retransmit the subset of the data by switching the communication lines.
16. 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.
17. The communication system according to claim 1 , wherein
the plurality of communication lines include a wireless communication line.
18. The communication system according to claim 1 , wherein
the content included in the data is moving image data.
19. The communication system according to claim 18 , 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.
20. A transmission apparatus comprising:
processing circuitry configured to:
generate information regarding QoS of a plurality of communication lines
designates 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) a reproduction time of content included in the data; 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.