| 摘要 |
PROBLEM TO BE SOLVED: To realize packet transmission by means of considering the communication quality of data flow only in a period when a packet transmission processing is congested by identifying data flow to which a transmission packet belongs during a period when the packet transmission processing is congested and transmitting the packet in accordance with the communication quality of data flow when the packet can be transmitted. SOLUTION: When the packet transmission processing is in a congested state, the values of a transmission source IP address in a packet header, a transmission destination IP address and a transmission destination port number is checked to be matched with the registration value of a data flow information management table 301 or not. When they are matched, the packet is registered in the pertinent data flow table and the number of the registered packet is increased by one. The number of the registered packets in the pertinent class management part in a data flow corresponding packet management part 304 is increased by one. The congested state is judged by the number of packets waiting for transmission and data flow on a real time basis is preferentially transmitted when the packets is transmitted. |
