| 摘要 |
<p>To enable data transmission without transmitting packet's serial numbers, a transmit serial number is incremented by one at a transmit site each time a data packet is sent to a receive site, and a copy of the transmitted packet is stored in a transmit memory corresponding to the transmit serial number. The process is repeated so that a predetermined number of outstanding packets are transmitted. At the receive site, a receive serial number is incremented by one upon receipt of each packet and the packet is stored in a receive memory. To enable the receive serial number to be incremented even if there is a loss of packets during transmission, a timer is started at the receive site after receiving at least one packet. At timing specified by the timer, the receive site increments its serial number by 1 and stores a received packet into the receive memory if there is one at the specified timing or a dummy packet into the receive memory if there is no packet received at the specified timing. The process is repeated until the serial number of the receive site equals the predetermined number and the receive memory is then searched. If there is a dummy packet in the receive memory, the serial number of the dummy packet is sent to request for retransmission of a copy of the lost packet to replace the dummy packet with the retransmitted copy. <IMAGE></p> |
