公开(公告)号：US6147969A

公开(公告)日：2000-11-14

申请号：US173955

申请日：1998-10-14

申请人： Lofti Benmohamed ,  Yung-Terng Wang ,  Wing Cheong Lau

发明人： Lofti Benmohamed ,  Yung-Terng Wang ,  Wing Cheong Lau

IPC分类号： H04L12/56 ,  H04Q11/04 ,  H04L12/26

CPC分类号： H04Q11/0478 ,  H04L47/10 ,  H04L47/30 ,  H04L49/3081 ,  H04L2012/5635 ,  H04L2012/5682

摘要： An improved flow control method for ABR service in an ATM network. In particular, a dual local/global ingress flow control method for ABR service in a distributed ingress queueing switch including a plurality of ingress buffer-pools, at least one shared buffer-pool and a plurality of egress buffer-pools. Utilization of the egress port of each shared buffer-pool is periodically measured and together with the current state of the global-ingress control forms the basis for toggling global-ingress control in an active/inactive state. Queue-length based flow control algorithms such as DMRCA are applied to each resource management cell for the egress subport queue and ingress flow queue through which the resource management cell passes to determine the egress and local-ingress congestion marking values, respectively, for the resource management cell. In addition, global-ingress congestion is detected by applying a queue-length based flow control algorithm to the summation of the ingress flow queues contributing to the shared buffer-pool egress port through which the resource management cell passed. If global-ingress control is active then the resource management cell is marked based on the merged egress, global-ingress, local-ingress congestion marking values and the congestion marking values originally carried by the resource management cell. Otherwise the resource management cell is marked based on the merged egress, local-ingress congestion marking values and the congestion marking values originally carried by the resource management cell.

摘要翻译： 一种用于ATM网络中ABR业务的改进流控制方法。 特别地，在包括多个入口缓冲池，至少一个共享缓冲池和多个出口缓冲池的分布式入口排队交换机中，用于ABR服务的双局部/全局入口流控制方法。 定期测量每个共享缓冲池的出口端口的利用率，并与全局入口控制的当前状态一起构成在全局入口控制处于活动/非活动状态时切换的基础。 基于队列长度的流控制算法（例如DMRCA）被应用于资源管理单元通过的出口子端口队列和入口流队列的每个资源管理单元，以分别确定资源的出口和本地进入拥塞标记值 管理单元 另外，通过将基于队列长度的流控制算法应用于贡献给资源管理单元通过的共享缓冲池出口端口的入口流队列的总和来检测全局入口拥塞。 如果全局入口控制处于活动状态，则基于资源管理单元最初携带的合并出站，全局入口，本地入口拥塞标记值和拥塞标记值，对资源管理单元进行标记。 否则，资源管理单元根据资源管理单元最初携带的合并出站，本地入口拥塞标记值和拥塞标记值进行标记。