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22. 发明授权

US5404461A Broadcast/switching apparatus for executing broadcast/multi-cast transfers over unbuffered asynchronous switching networks 失效
标题翻译：用于通过无缓冲异步交换网络执行广播/多播传输的广播/交换装置
公开(公告)号：US5404461A
公开(公告)日：1995-04-04
申请号：US748316
申请日：1991-08-21
申请人： Howard T. Olnowich , Robert F. Lusch , John D. Jabusch
发明人： Howard T. Olnowich , Robert F. Lusch , John D. Jabusch
IPC分类号： H04Q3/545 , G06F11/26 , G06F13/40 , G06F15/173 , H04L1/00 , H04L7/033 , H04L12/18 , H04L12/56 , H04Q11/00 , H04Q11/04 , G06F13/00
CPC分类号： H04L1/0057 , G06F13/4022 , G06F15/17375 , G06F15/17393 , H04L12/1881 , H04L49/201 , H04L49/25 , H04L7/0338 , H04Q11/0478 , G06F11/261 , H04L49/101 , H04L49/15 , H04L49/1523 , H04L49/205 , H04L49/40 , H04L49/555 , H04Q11/0066
摘要： A broadcast/switching apparatus makes input port to output port connections on a requested basis quickly and dynamically in a standard mode from any one of the input ports to any one of the output ports, in a multi-cast mode from any one of the input ports to a fixed number of subsets of multiple output ports simultaneously, or in a broadcast mode from any one of the input ports to all output ports simultaneously, using a new asynchronous approach to resolve either broadcast or multi-cast contention among input ports. The normal mode of the broadcast/switch apparatus requires absolutely no synchronization among any of the input and output ports which interface to the apparatus. The broadcast/switch apparatus also incorporates a new accept protocol that enables a positive feedback indication to be returned to the sender of a multi-cast or broadcast operation to inform it that the multi-cast or broadcast transmission was correctly received by all elements involved in the multi-cast or broadcast. The broadcast/switch is completely void of centrally controlled clocking and data buffering. Data which traverses the switch encounters only three gate delays--on-chip receiver, mux, and off-chip driver. Contention is detected and resolved on chip. Each broadcast/switch port interface requires several parallel data lines plus four control lines.
摘要翻译：广播/交换装置使得输入端口以任何一个输入端以多播模式从标准模式中快速而动态地输出端口连接到输入端口中的任何一个输出端口端口同时进入多个输出端口的固定数量的子集，或者以从任何一个输入端口到所有输出端口的广播模式同时进行，使用新的异步方法来解决输入端口之间的广播或多播竞争。广播/交换设备的正常模式在与设备接口的任何输入和输出端口中绝对不需要同步。广播/交换设备还包括一种新的接受协议，其使肯定的反馈指示能够返回到多播或广播操作的发送者，以通知它所述多播或广播传输被所有元素正确地接收多播或广播。广播/交换机完全无法集中控制时钟和数据缓冲。穿过交换机的数据仅遇到片上接收器，多路复用器和片外驱动器的三个门延迟。在芯片上检测和解决争用。每个广播/交换机端口接口需要多条并行数据线加上四条控制线。

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