Content transmission method, content transmission device, and recording medium

1. A content transmission method comprising:

searching, when a first information processing device receives a transmission request for a first content from a second information processing device, for a third information processing device within information processing devices, the third information processing device having a connection with the second information processing device and currently transmitting a second content to the second information processing device;

transmitting to the third information processing device, by the first information processing device, the first content and an instruction to transmit the transmitted first content from the third information processing device to the second information processing device in accordance with the transmission request;

during the searching for the third information processing device, acquiring an estimated release time of a connection with the second information processing device from each of the information processing devices; and

selecting, as the third information processing device from among the information processing devices, an information processing device with which the transmission of the first content from the first information processing device is to be completed before the estimated release time.

2. The content transmission method according to claim 1 , wherein the estimated release time of the selected information processing device is earliest among the information processing devices.

3. The content transmission method according to claim 1 , further comprising:

preferentially selecting, as the third information processing device, an information processing device with which a number of simultaneous connections with other information processing devices is fewest.

4. The content transmission method according to claim 1 , further comprising:

during the searching for the third information processing device, selecting the third information processing device from among the information processing devices that have a number of contents waiting for transmission less than a predetermined upper limit value.

5. The content transmission method according to claim 1 , further comprising:

during the searching for the third information processing device, selecting the third information processing device from among the information processing devices that have a number of hops with the first information processing device less than or equal to a predetermined number.

6. The content transmission method according to claim 1 , further comprising:

during the searching for the third information processing device, selecting the third information processing device from among the information processing devices that have a number of simultaneous connections, less than a predetermined upper limit value of connections, with other information processing devices.

7. The content transmission method according to claim 1 , further comprising:

notifying the second information processing device, by the first information processing device, that the third information processing device is instructed to transmit the first content, during the transmitting.

8. A content transmission device comprising:

a memory; and

a processor coupled to the memory and configured to:

search for a first information processing device within information processing devices in a case of receiving a transmission request for a first content from a second information processing device, the first information processing device having a connection with the second information processing device and currently transmitting a second content to the second information processing device;

transmit, to the first information processing device, the first content and an instruction to transmit the transmitted first content from the first information processing device to the second information processing device;

acquire an estimated release time of a connection with the second information processing device from each of the information processing devices, during the search for the first information processing device; and

select, as the first information processing device from among the information processing devices, an information processing device with which the transmission of the first content to is to be completed before the estimated release time.

9. A non-transitory computer-readable medium storing therein a program that causes a computer to execute a process, the process comprising:

searching, when a first information processing device receives a transmission request for a first content from a second information processing device, for a third information processing device within information processing devices, the third information processing device having a connection with the second information processing device and currently transmitting a second content to the second information processing device;

transmitting to the third information processing device, by the first information processing device, the first content and an instruction to transmit the transmitted first content from the third information processing device to the second information processing device in accordance with the transmission request;

during the searching for the third information processing device, acquiring an estimated release time of a connection with the second information processing device from each of the information processing devices; and

selecting, as the third information processing device from among the information processing devices, an information processing device with which the transmission of the first content from the first information processing device is to be completed before the estimated release time.