Reception apparatus, reception method, and recording medium

1. A reception apparatus, comprising:

a plurality of receivers, each corresponding to a communication path among a plurality of communication paths connecting the reception apparatus with a transmission apparatus, and configured to receive a plurality of divided data units obtained by dividing a data unit; and

a processor coupled to a memory, wherein the processor executes:

sorting, at a time according to both reception of a last divided data unit of a first data unit by a first receiver of the plurality of receivers and reception of a divided data unit of a second data unit by a second receiver of the plurality of receivers, a plurality of divided data units of the first data unit received by the plurality of receivers wherein the second data unit is transmitted after transmission of the first data unit by the transmission apparatus; and

performing reproduction of the plurality of divided data units of the first data unit according to order sorted in the sorting.

2. The reception apparatus according to claim 1 , wherein the data unit corresponds to a video frame, and the divided data unit is a packet.

3. The reception apparatus according to claim 1 , wherein the processor further executes:

obtaining a sequence number indicating transmission order of a divided data unit received by a receiver of the plurality of receivers; and

determining, based on the obtained sequence number, that the second receiver has received a divided data unit of the second data unit, and

wherein in the sorting, the plurality of divided data units of the first data unit received by the plurality of receivers are sorted at the time according to both reception of the last divided data unit of the first data unit by the first receiver and the determination that the second receiver has received a divided data unit of the second data unit.

4. The reception apparatus according to claim 1 , wherein the processor further executes:

obtaining a subflow sequence number indicating transmission order, in a communication path, of a divided data unit received by a receiver of the plurality of receivers; and

determining, based on the obtained subflow sequence number, whether there is any divided data unit which has been transmitted by the transmission apparatus but has not been received by the plurality of receivers, and wherein,

in the sorting, the plurality of divided data units of the first data unit received by the plurality of receivers, are sorted according to the determination that there is no divided data unit which has been transmitted by the transmission apparatus but has not been received by the plurality of receivers.

5. The reception apparatus according to claim 1 ,

wherein in the sorting, the plurality of divided data units of the first data unit received by the plurality of receivers are sorted even if the second receiver has not received a divided data unit of the second data unit, in a case where a predetermined period of time has passed after sorting of a plurality of divided data units corresponding to a third data unit which is transmitted before the first data unit by the transmission apparatus.

6. A method for controlling a reception apparatus, the method comprising:

receiving a plurality of divided data units obtained by dividing a data unit with a plurality of receivers corresponding to a plurality of communication paths connecting the reception apparatus with a transmission apparatus;

sorting, at a time according to both reception of a last divided data unit of a first data unit by a first receiver of the plurality of receivers and reception of a divided data unit of a second data unit by a second receiver of the plurality of receivers, a plurality of divided data units of the first data unit received by the plurality of receivers wherein the second data unit is transmitted after the first data unit by the transmission apparatus; and

performing reproduction of the plurality of divided data units of the first data unit according to order sorted in the sorting.

7. The method according to claim 6 , further comprising:

obtaining a sequence number indicating transmission order of a divided data unit received by a receiver of the plurality of receivers; and

determining, based on the obtained sequence number, that the second receiver has received a divided data unit of the second data unit, and wherein

in the sorting, the plurality of divided data units of the first data unit received by the plurality of receivers are sorted at the time according to both reception of the last divided data unit of the first data unit by the first receiver and the determination that the second receiver has received a divided data unit of the second data unit.

8. A non-transitory recording medium recording a program that causes a computer to execute:

receiving a plurality of divided data units obtained by dividing a data unit with a plurality of receivers corresponding to a plurality of communication paths connecting the reception apparatus with a transmission apparatus;

sorting, at a time according to both reception of a last divided data unit of a first data unit by a first receiver of the plurality of receivers and reception of a divided data unit of a second data unit by a second receiver of the plurality of receivers, a plurality of divided data units of the first data unit received by the plurality of receivers wherein the second data unit is transmitted after the first data unit by the transmission apparatus; and

performing reproduction of the plurality of divided data units of the first data unit according to order sorted in the sorting.

9. The non-transitory recording medium storing the program according to claim 8 , wherein the program causes the computer to further execute:

obtaining a sequence number indicating transmission order of a divided data unit received by a receiver of the plurality of receivers; and

determining, based on the obtained sequence number, that the second receiver has received a divided data unit of the second data unit,

wherein in the sorting, the plurality of divided data units of the first data unit received by the plurality of receivers are sorted at the time according to both reception of the last divided data unit of the first data unit by the first receiver and the determination that the second receiver has received a divided data unit of the second data unit.

10. The reception apparatus according to claim 3 , wherein

in the determining, in a case where nonconsecutive sequence numbers of divided data units received by the second receiver are obtained in the obtaining, it is determined that the second receiver has received a divided data unit of the second data unit.

11. The reception apparatus according to claim 3 ,

wherein in the determining, in a case where the obtained sequence number of a divided data unit received by the second receiver is greater than a sequence number of the last divided data unit received by the first receiver, it is determined that the second receiver has received a divided data unit of the second data unit.

12. The reception apparatus according to claim 3 , wherein the processor further executes:

determining, based on identification information included in a divided data unit received by the first receiver, that the first receiver has received the last divided data unit of the first data unit, the identification information indicating last of a data unit, and

wherein in the sorting, the plurality of divided data units of the first data unit received by the plurality of receivers are sorted at the time according to both the determination that the first receiver has received the last divided data unit of the first data unit and the determination that the second receiver has received a divided data unit of the second data unit.

13. The reception apparatus according to claim 1 , wherein

in the sorting, the plurality of divided data units of the first data unit received by the plurality of receivers are sorted at the time according to both reception of the last divided data unit of the first data unit by the first receiver and reception of divided data units of the second data unit by all of the plurality of receivers except the first receiver.