METHOD AND APPARATUS FOR TRANSMITTING STREAMED INGRESSING DATA THROUGH A SWITCH FABRIC THAT PROVIDES READ REQUESTS AT AN INGRESS INDEPENDENT REQUEST RATE
    1.
    发明申请
    METHOD AND APPARATUS FOR TRANSMITTING STREAMED INGRESSING DATA THROUGH A SWITCH FABRIC THAT PROVIDES READ REQUESTS AT AN INGRESS INDEPENDENT REQUEST RATE 失效
    用于通过开放式织物传输流水线数据的方法和装置,其以独立的请求率提供读取请求

    公开(公告)号:US20060002411A1

    公开(公告)日:2006-01-05

    申请号:US09790302

    申请日:2001-02-21

    申请人: Gurmohan Samrao

    发明人: Gurmohan Samrao

    CPC分类号: H04J3/0632

    摘要: An apparatus and method reduce jitter in SPE data transmitted to a switch fabric. A processor receives STS channel requests from the switch fabric, and retrieves SPE data in buffers assigned to the requested STS channels. The processor loads the SPE data in the PDU of a TDM cell, the TDM cell in the PDU of a PIC, and a length of the SPE data in the header of the PIC. The PIC is then embedded in a CSIX frame that is transmitted to the switch fabric through a CSIX interface. The length of the SPE data in the PIC PDU is variable since the processor retrieves SPE data upon demand from the switch fabric. Thus, even if enough data to fill an entire PDU is not in a channel buffer at the time of a channel request, the available data is transmitted so that the opportunity to transmit available SPE data is not lost.

    摘要翻译: 一种装置和方法可以减少发送到交换结构的SPE数据中的抖动。 处理器从交换结构接收STS信道请求,并且在分配给所请求的STS信道的缓冲器中检索SPE数据。 处理器将TDM数据加载到TDM信元的PDU中,PIC中的PDU中的TDM信元以及PIC头中的SPE数据的长度。 然后将PIC嵌入到通过CSIX接口传输到交换结构的CSIX帧中。 PIC PDU中SPE数据的长度是可变的,因为处理器根据需要从交换结构中检索SPE数据。 因此,即使足够的数据来填充整个PDU,在通道请求时也不在通道缓冲器中,所以发送可用数据,从而不会丢失发送可用SPE数据的机会。

    Scheme for maintaining synchronization in an inherently asynchronous system
    2.
    发明授权
    Scheme for maintaining synchronization in an inherently asynchronous system 失效
    用于在固有异步系统中维护同步的方案

    公开(公告)号:US06898211B1

    公开(公告)日:2005-05-24

    申请号:US09334693

    申请日:1999-06-16

    IPC分类号: H04J3/06

    CPC分类号: H04J3/0697

    摘要: A synchronization state for a local clock generating circuit of a first of a number of components of a distributed system is maintained according to a number of local clock cycles recorded between successive occurrences of a global synchronization signal provided to the components within the distributed system. The local clock generating circuit may enters the synchronization state only after observing a predetermined number of occurrences of successive local clock cycles between instances of the global synchronization signal. The local clock generating circuit continues to provide local control signals for the first of the components at time instants corresponding to the number of local clock cycles even after an instance of the global synchronization signal is observed at a time instant corresponding to one local clock cycle more or less than the number of local clock cycles. However, the local clock generating circuit enters an alarm state when the global synchronization signal is observed at time instants corresponding to more than one local clock cycle more or less than the number of local clock cycles.

    摘要翻译: 根据在分布式系统中提供给组件的全局同步信号的连续出现之间记录的本地时钟周期的数量来保持分布式系统的多个组件中的第一个组件的本地时钟发生电路的同步状态。 本地时钟发生电路只有在观察到全局同步信号的实例之间的连续本地时钟周期的预定次数的出现之后,才能进入同步状态。 本地时钟发生电路继续在对应于本地时钟周期的数量的时刻在第一个分量提供本地控制信号,即使在对应于一个本地时钟周期的时间点观察到全局同步信号的一个实例之后 或小于本地时钟周期的数量。 然而,当在多于或多于本地时钟周期的多于一个本地时钟周期的时刻观察全局同步信号时,本地时钟发生电路进入报警状态。

    Dynamically delisting and relisting multicast destinations in a network switching node
    4.
    发明授权
    Dynamically delisting and relisting multicast destinations in a network switching node 有权
    在网络交换节点中动态地删除和重新组播多播目的地

    公开(公告)号:US06625121B1

    公开(公告)日:2003-09-23

    申请号:US09301519

    申请日:1999-04-28

    IPC分类号: H04J116

    摘要: An apparatus and method for reducing congestion in a network switching node. A congestion mask that indicates which of a plurality of destination ports in a network switching node are congested is generated and combined with a destination port field included in a packet in a multicast queue of the switching node to mask destination port designations in the destination port field that are indicated by the congestion mask to be congested if a drop eligibility field within the packet indicates that destination port designations are permitted to be masked. The packet is dequeued from the multicast queue to be forwarded to destination ports in the network switching node indicated by destination port designations in the destination port field not masked by the combination of the congestion mask with the destination port field.

    摘要翻译: 一种用于减少网络交换节点拥塞的装置和方法。 生成表示网络交换节点中的多个目的地端口中的哪一个拥塞的拥塞掩码,并与包含在交换节点的多播队列中的分组中的目的地端口字段组合,以掩盖目的地端口字段中的目的地端口名称 如果分组内的丢弃资格字段指示允许目的地端口指定被屏蔽,则由拥塞掩码指示为拥塞。 数据包从组播队列出发,转发到目的端口字段指示的网络交换节点中的目的端口,目的端口字段未被阻塞掩码与目的端口字段的组合掩蔽。