Information processing device, communication method, and communication system

1. An information processing device comprising:

an information acquisition unit which acquires information; and

a communication unit which communicates with an external device via near field communication;

wherein the communication unit divides data of the acquired information into a plurality of blocks, each block including a plurality of packets, transmits the plurality of packets of a first block of the plurality of blocks with a first characteristic provided with a property of read with no acknowledge, and in response to transmitting the plurality of packets of the first block, receives a receiving result, associated with the first block, from the external device, with a second characteristic provided with the property of write with acknowledge.

2. The information processing device according to claim 1 , wherein

if the receiving result is an acknowledge command associated with the first block, the communication unit determines that reception of the first block by the external device is successful.

3. The information processing device according to claim 1 , wherein

the transmitted plurality of packets of the first block include sequence numbers indicating the order of transmission of the plurality of packets; and

if the receiving result includes one of the sequence numbers of the plurality of packets included in the first block, the communication unit retransmits packets included in the first block starting with the packet corresponding to the sequence number included in the receiving result.

4. The information processing device according to claim 1 , wherein

when the communication unit is in a state where transmission of the information is possible, the communication unit transmits, to the external device, an upload data size of the information with a third characteristic provided with the property of read with acknowledge.

5. A communication method comprising:

acquiring information;

dividing data of the information into a plurality of blocks, each block including a plurality of packets;

transmitting the plurality of packets of a first block of the plurality of blocks to an external device with a first characteristic provided with a property of read with no acknowledge; and

in response to transmitting the plurality of packets of the first block, receiving a receiving result, associated with the first block, from the external device, with a second characteristic provided with the property of write with acknowledge.

6. A communication system comprising:

a first information processing device which acquires information; and

a second information processing device which communicates with the first information processing device via near field communication;

wherein the first information processing device divides data of the acquired information into a plurality of blocks, each block including a plurality of packets, and transmits the plurality of packets of a first block of the plurality of blocks to the second information processing device, with a first characteristic provided with a property of read with no acknowledge;

the second information processing device receives the plurality of packets of the first block with the first characteristic and in response transmits, to the first information processing device, a receiving result, associate with the first block, with a second characteristic provided with the property of write with acknowledge, and

the first information processing device receives the receiving result with the second characteristic.