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1. 发明授权

US07180857B2 Apparatus and method for flow control 失效
标题翻译：流量控制装置及方法
公开(公告)号：US07180857B2
公开(公告)日：2007-02-20
申请号：US10140174
申请日：2002-05-08
申请人： Tetsuya Kawakami , Yoshihiro Suzuki , Satoshi Kitajima , Atsushi Nakamura
发明人： Tetsuya Kawakami , Yoshihiro Suzuki , Satoshi Kitajima , Atsushi Nakamura
IPC分类号： G01R31/08 , G06F11/00 , G08C15/00 , H04L12/28
CPC分类号： H04L47/10 , H04L47/26
摘要： In flow control apparatus formed of a network of switching hubs in a hierarchy configuration for performing data packet transfer within each of a plurality of respectively separate groups of terminals, based on use of group identifiers contained in the data packets, occurrence of congestion of the output section of a port of a switching hub is judged respectively separately for each of the terminal groups, and one or more congestion notification packets for effecting a pause in data packet transmission are generated and transmitted from that switching hub, directed only to one or more terminals of a group relating to the congestion. As a result, the effects of port congestion and of congestion control operations are limited to the terminal group concerned. Congestion can be judged for a terminal group based on a level of utilization of a port output buffer that is used only by that group, or based on a rate of flow of data from that group into a port output buffer which is used in common for all terminal groups, and congestion notification packets may be transmitted from a single port or from a plurality of ports of a switching hub, in accordance with the detected degree of congestion.
摘要翻译：在由层次结构中的交换集线器网络形成的流控制装置中，用于根据包含在数据分组中的组标识符的使用，在多个分开的多个终端组内进行数据分组传送，输出的拥塞发生分别对每个终端组分别判断交换集线器的端口部分，并且产生用于实现数据分组传输中的暂停的一个或多个拥塞通知分组，并从该交换集线器发送，仅针对一个或多个终端与拥堵有关的群体。结果，端口拥塞和拥塞控制操作的影响仅限于有关的终端组。基于仅由该组使用的端口输出缓冲器的利用水平，或者基于从该组的数据流到端口输出缓冲器的流量的速率，终端组可以判断拥塞，其通常用于所有终端组和拥塞通知分组可以根据检测到的拥塞程度从单个端口或从交换集线器的多个端口发送。

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