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    • 3. 发明申请
    • DELIVERING MULTICAST FRAMES TO AGGREGATED LINK TRUNKS IN A DISTRIBUTED SWITCH
    • 在分布式交换机中传送多媒体帧
    • US20130242988A1
    • 2013-09-19
    • US13420259
    • 2012-03-14
    • Claude BassoTodd A. GreenfieldBruce M. Walk
    • Claude BassoTodd A. GreenfieldBruce M. Walk
    • H04L12/56
    • H04L45/16H04L49/201H04L49/351H04L49/70
    • A distributed switch may include a plurality of sub-switches. These sub-switches may be arranged in a hierarchy that increases the available bandwidth for transmitting multicast data frames across the switch fabric. Moreover, the distributed switch may be compatible with link aggregation where multiple physical connections are grouped together to create an aggregated (logical) link. Link aggregation requires similar data frames to use the same data path when traversing the distributed switch. With a unicast data frame, the sub-switch in the distributed switch that receives the data frame typically identifies the destination port (during a process called link selection) and forwards the data frame to the sub-switch containing that port. However, with multicast data frames, instead of the receiving sub-switch performing link selection to determine the destination port, link selection may be done by a different sub-switch or not done at all.
    • 分布式交换机可以包括多个子交换机。 这些子交换机可以以层次结构来布置,从而增加跨越交换结构传输多播数据帧的可用带宽。 此外,分布式交换机可以与链路聚合兼容,其中多个物理连接被分组在一起以创建聚合(逻辑)链路。 链路聚合需要相似的数据帧才能在穿过分布式交换机时使用相同的数据路径。 通过单播数据帧,接收数据帧的分布式交换机中的子交换机通常标识目的端口(在称为链路选择的过程中),并将数据帧转发到包含该端口的子交换机。 然而,使用组播数据帧,代替执行链路选择的接收子交换机来确定目的地端口,链路选择可以由不同的子交换机完成,或者根本不完成。
    • 4. 发明申请
    • DYNAMIC OPTIMIZATION OF A MULTICAST TREE HIERARCHY FOR A DISTRIBUTED SWITCH
    • 用于分布式开关的多媒体树分层的动态优化
    • US20130242987A1
    • 2013-09-19
    • US13420232
    • 2012-03-14
    • Claude BassoTodd A. GreenfieldBruce M. Walk
    • Claude BassoTodd A. GreenfieldBruce M. Walk
    • H04L12/56
    • H04L12/18H04L12/185
    • A distributed switch may include a hierarchy with one or more levels of surrogate sub-switches (and surrogate bridge elements) that enable the distributed switch to scale bandwidth based on the size of the membership of a multicast group. Moreover, each surrogate may optimize the hierarchy according to one or more optimization criteria. For example, each surrogate in the hierarchy may have the necessary information to ensure that if the next surrogate in the hierarchy is unavailable, the data may be routed to a backup surrogate. The selected hierarchy may be further optimized by skipping surrogates (or a surrogate level) such that the data intended for a skipped surrogate is sent to a surrogate in a lower-level of the hierarchy. This may better utilize the connection interfaces in the transmitting sub-switches and eliminate any unnecessary surrogate-to-surrogate transfers.
    • 分布式交换机可以包括具有使得分布式交换机能够基于多播组的成员资格的大小来缩放带宽的代理子交换机(和代理桥元素)的一个或多个级别的层级。 此外,每个代理可以根据一个或多个优化标准优化层次。 例如,层次结构中的每个代理可以具有必要的信息,以确保如果层次结构中的下一个代理不可用,则数据可以被路由到备用代理。 可以通过跳过代理(或替代级别)来进一步优化所选择的层次结构,使得用于跳过的代理的数据被发送到层次结构的较低级别的代理。 这可以更好地利用发送子交换机中的连接接口,并消除任何不必要的替代代理转移。
    • 9. 发明申请
    • Early HSS Rx Data Sampling
    • 早期HSS Rx数据采样
    • US20080247496A1
    • 2008-10-09
    • US12141183
    • 2008-06-18
    • Wayne M. BarrettTodd A. Greenfield
    • Wayne M. BarrettTodd A. Greenfield
    • H04L7/00
    • G06F13/385H03K5/135H03M9/00
    • In a method for reading data from a serial data source in a parallel format, data from the serial data source is deserialized by placing a plurality of predefined units of data onto a parallel bus and asserting a deserialization clock when each of the plurality of predefined units is valid on the parallel bus. A delayed clock pulse is generated a predetermined amount of time after each assertion of the deserialization clock. Each delayed pulse is repeated so as to generate an end point repeated clock pulse corresponding to each delayed pulse wherein the predetermined amount of time is an amount of time that ensures that each predefined unit of data on the parallel bus is valid when each end point repeated clock pulse is asserted.
    • 在用于以并行格式从串行数据源读取数据的方法中,来自串行数据源的数据通过将多个预定义的数据单元放置在并行总线上而反序列化,并且当多个预定义单元中的每一个单元 在并行总线上有效。 延迟时钟脉冲在每次断言反序列化时钟之后产生预定的时间量。 重复每个延迟脉冲,以便产生对应于每个延迟脉冲的终点重复时钟脉冲,其中预定量的时间是确保每个终点重复时并行总线上的每个预定义的数据单元有效的时间量 时钟脉冲被断言。