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    • 54. 发明授权
    • Method and system for managing congestion in a network
    • 管理网络拥塞的方法和系统
    • US06657962B1
    • 2003-12-02
    • US09546651
    • 2000-04-10
    • Peter Irma August BarriBrian Mitchell BassJean Louis CalvignacIvan Oscar ClemminckMarco C. HeddesClark Debs JeffriesMichael Steven SiegelFabrice Jean VerplankenMiroslav Vrana
    • Peter Irma August BarriBrian Mitchell BassJean Louis CalvignacIvan Oscar ClemminckMarco C. HeddesClark Debs JeffriesMichael Steven SiegelFabrice Jean VerplankenMiroslav Vrana
    • H04L1256
    • H04L47/2441H04L47/10H04L47/12H04L47/30H04L47/32H04L49/103H04L49/3018H04L49/50H04L49/90
    • A system for minimizing congestion in a communication system is disclosed. The system comprises at least one ingress system for providing data. The ingress system includes a first free queue and a first flow queue. The system also includes a first congestion adjustment module for receiving congestion indications from the free queue and the flow queue. The first congestion adjustment module generates end stores transmit probabilities and performs per packet flow control actions. The system further includes a switch fabric for receiving data from the ingress system and for providing a congestion indication to the ingress system. The system further includes at least one egress system for receiving the data from the switch fabric. The egress system includes a second free queue and a second flow queue. The system also includes a second congestion adjustment module for receiving congestion indications from the second free queue and the second flow queue. The second congestion adjustment module generates and stores transmit probabilities and performs per packet flow control actions. Finally, the system includes a scheduler for determining the order and timing of transmission of packets out the egress system and to another node or destination. A method and system in accordance with the present invention provides for a unified method and system for logical connection of congestion with the appropriate flow control responses. The method and system utilizes congestion indicators within the ingress system, egress system, and the switch fabric in conjunction with a coarse adjustment system and fine adjustment system within the ingress device and the egress device to intelligently manage the system.
    • 公开了一种用于最小化通信系统中的拥塞的系统。 该系统包括用于提供数据的至少一个入口系统。 入口系统包括第一空闲队列和第一流队列。 该系统还包括用于从空闲队列和流队列接收拥塞指示的第一拥塞调整模块。 第一拥塞调整模块生成终端存储发送概率并执行每个分组流控制动作。 该系统还包括用于从入口系统接收数据并向入口系统提供拥塞指示的交换结构。 该系统还包括用于从交换结构接收数据的至少一个出口系统。 出口系统包括第二空闲队列和第二流队列。 该系统还包括第二拥塞调整模块,用于从第二空闲队列和第二流队列接收拥塞指示。 第二拥塞调整模块生成并存储发送概率,并执行每个分组流控制动作。 最后,该系统包括一个调度器,用于确定出口系统和另一个节点或目的地的分组传输的顺序和定时。 根据本发明的方法和系统提供了用于将拥塞与适当流控制响应逻辑连接的统一方法和系统。 该方法和系统利用入口系统,出口系统和交换结构中的拥塞指示符与入口设备和出口设备内的粗调系统和精细调整系统结合,智能地管理系统。
    • 58. 发明授权
    • Packet classification using modified range labels
    • 数据包分类使用修改的范围标签
    • US07796513B2
    • 2010-09-14
    • US12187188
    • 2008-08-06
    • Claude BassoJean Louis CalvignacGordon Taylor DavisClark Debs Jeffries
    • Claude BassoJean Louis CalvignacGordon Taylor DavisClark Debs Jeffries
    • H04L12/26
    • H04L45/00H04L12/4625H04L45/54H04L45/7453H04L63/0263
    • A method and system for encoding a set of range labels for each parameter field in a packet classification key in such a way as to require preferably only a single entry per rule in a final processing stage of a packet classifier. Multiple rules are sorted accorded to their respective significance. A range, based on a parameter in the packet header, is previously determined. Multiple rules are evaluated according to an overlapping of rules according to different ranges. Upon a determination that two or more rules overlap, each overlapping rule is expanded into multiple unique segments that identify unique range intersections. Each cluster of overlapping ranges is then offset so that at least one bit in a range for the rule remains unchanged. The range segments are then converted from binary to Gray code, which results in the ability to determine a CAM entry to use for each range.
    • 一种方法和系统,用于以分组分类密钥中的每个参数字段的一组范围标签进行编码,以便在分组分类器的最后处理阶段中优选地仅需要每个规则仅一个条目。 根据各自的意义对多个规则进行排序。 预先确定基于分组报头中的参数的范围。 根据不同范围的规则重叠来评估多个规则。 在确定两个或更多个规则重叠时,每个重叠规则被扩展为识别唯一范围交点的多个唯一段。 然后,每个重叠范围的簇被偏移,使得该规则的范围中的至少一个位保持不变。 范围段然后从二进制转换为格雷码,这导致确定每个范围使用的CAM条目的能力。
    • 60. 发明授权
    • Scheduler, network processor, and methods for weighted best effort scheduling
    • 调度器,网络处理器和加权最佳努力调度的方法
    • US07529224B2
    • 2009-05-05
    • US11108485
    • 2005-04-18
    • Claude BassoJean Louis CalvignacChih-jen ChangNatarajan VaidhyanathanFabrice Jean Verplanken
    • Claude BassoJean Louis CalvignacChih-jen ChangNatarajan VaidhyanathanFabrice Jean Verplanken
    • H04L12/28
    • H04L47/568H04L45/00H04L45/60H04L47/50H04L47/527
    • Systems and methods for scheduling data packets in a network processor are disclosed. Embodiments provide a network processor that comprises a best-effort scheduler with a minimal calendar structure for addressing schedule control blocks. In one embodiment, a three-entry calendar structure provides for weighted best effort scheduling. Each of a plurality different flows has an associated schedule control block. Schedule control blocks are stored as linked lists in a last-in-first-out buffer. Each calendar entry is associated with a different linked list by storing in the calendar entry the address of the first-out schedule control block in the linked list. Each schedule control block has a counter and is assigned a weight according to the bandwidth priority of the flow to which the corresponding packet belongs. Each time a schedule control block is accessed from a last-in-first-out buffer storing the linked list, the scheduler generates a scheduling event and the counter of the schedule control block is incremented. When an incremented counter of a schedule control block equals its weight, the schedule control block is temporarily removed from further scheduling.
    • 公开了一种用于在网络处理器中调度数据分组的系统和方法。 实施例提供了一种网络处理器,其包括具有用于寻址日程控制块的最小日历结构的尽力而为调度器。 在一个实施例中,三入口日历结构提供加权最佳努力调度。 多个不同的流中的每一个具有相关的进度控制块。 计划控制块作为链表存储在先进先出缓冲区中。 通过在日历条目中存储链表中的先出时间表控制块的地址来将每个日历条目与不同的链表相关联。 每个调度控制块具有计数器,并根据相应分组所属的流的带宽优先级分配权重。 每当从存储链表的最先进先出缓冲器访问调度控制块时,调度器生成调度事件,并且调度控制块的计数器递增。 当调度控制块的递增计数器等于其权重时,调度控制块暂时从进一步调度中移除。