| 摘要 |
In packet data flow control wherein point-to-multipoint communication or point-to-point communication is performed in a network comprising one or a plurality of packet exchanges that respectively accommodate a plurality of communication terminals, reduction of the transmission bandwidth or lowering of transmission rate caused by local congestion is absorbed by providing buffers for absorbing difference between the transmission bandwidths of the upstream link and downstream links of these packet exchanges at each packet exchange. At the packet exchanges the transmission rate of the downstream links from the packet exchange is controlled in accordance with a first load data that is notified thereto from the downstream links and, if the difference of transmission bandwidth of the upstream link and downstream links cannot be absorbed by the buffer, a second load data is generated based on the first load data and the free capacity of the buffer and the upstream link of the packet exchange is notified of the second load data. |
