Data packet transmitting/receiving system, data packet transmitting/receiving method and data packet transmitting/receiving program

Abstract

In a data packet transmission and reception system including a transmit buffer and a receive buffer and transmitting and receiving a data packet, the number of data packets receivable at the receive buffer is dynamically changed depending on the size of a data packet to be transmitted and received, so that resources of the receive buffer are used efficiently without creating an unused area in the capacity of the receive buffer as much as possible. This prevents discarding of a data packet due to the overflow at the receive buffer, achieving the same performance as in conventional technique by using less resources than those in conventional control technique.

Description

technical field [0001] The present invention relates to a data packet sending and receiving system, a data packet sending and receiving method, and a data packet sending and receiving program. Background technique [0002] In the past, in a system that transmits data packets from the transmission buffer on the sending side to the receiving buffer on the receiving side, in order to prevent the data packets from being discarded due to the overflow of the receiving buffer, the data packets in the receiving buffer are generally transferred from the receiving side to The readout status of the device is notified to the sending side, and the sending side controls the sending of the data packet. [0003] For example, in Patent Document 1 (Japanese Unexamined Patent Publication No. 9-135270), a technique is disclosed in which the number of queue stages (packet Number), use the fixed number of queue levels to control the sending of data packets. Below, combine Figure 22 , the prior...

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Problems solved by technology

Moreover, in such a case, a large unused area (in the above example, an unused area of ​​6 bytes is generated) is generated in the receive buffer, so there is a problem that resources as the receive buffer cannot be effectively utilized.

[0012] In addition, the above-mentioned problem arises not only in the case of sending data packets between communication devices through a network, but also in sending data between circuits, for example, inside a computer system In the case of packets, etc., in all systems that transmit packets from the send buffer on the send side to the receive buffer on the receive side, the

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