Communications apparatus

A communications method for notifying a communications counterpart apparatus connected via a network of a data amount in a window size, and receiving data as large as the window size, the data being transmitted from the communications counterpart apparatus, said communications method comprising:

• notifying the communications counterpart apparatus of the window size, the window size being larger than a capacity of a storing unit which stores the data transmitted from the communications counterpart apparatus;
• sequentially receiving a plurality of data packets, the plurality of data packets being (i) the data as large as the window size and (ii) transmitted from the communications counterpart apparatus;
• storing the received plurality of data packets in the storing unit, the plurality of data packets being transmitted in accordance with the window size notified of in said notifying;
• retrieving and processing the plurality of data packets stored in the storing unit;
• discarding a data packet included in the plurality of the data packets stored in the storing unit to secure available space in the storing unit;
• and
• requesting the communications counterpart apparatus to retransmit the data packet discarded in said discarding,
• wherein a data packet other than a last packet is discarded as the discarded data packet in said discarding so that a last data packet transmitted from the communications counterpart apparatus is stored in the storing unit as the last packet, the last data packet being one of the data packets sequentially transmitted in accordance with the window size notified of in said notifying.

A non-transitory computer readable recording medium having stored thereon a computer program for a computer for notifying a communications counterpart apparatus connected via a network of a data amount in a window size, and receiving data as large as the window size, the data being transmitted from the communications counterpart apparatus, wherein, when executed, said computer program causes the computer to execute a method comprising:

• notifying the communications counterpart apparatus of the window size, the window size being larger than a capacity of a storing unit which stores the data transmitted from the communications counterpart apparatus;
• sequentially receiving a plurality of data packets, the plurality of data packets being (i) the data as large as the window size and (ii) transmitted from the communications counterpart apparatus;
• storing the received plurality of data packets in the storing unit, the plurality of data packets being transmitted in accordance with the window size notified of in said notifying;
• retrieving and processing the plurality of data packets stored in the storing unit;
• discarding a data packet included in the plurality of the data packets stored in the storing unit to secure available space in the storing unit;
• and
• requesting the communications counterpart apparatus to retransmit the data packet discarded in said discarding,
• wherein a data packet other than a last packet is discarded as the discarded data packet in said discarding so that a last data packet transmitted from the communications counterpart apparatus is stored in the storing unit as the last packet, the last data packet being one of the data packets sequentially transmitted in accordance with the window size notified of in said notifying.