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    Signalling TDM channel changes
    4.
    发明授权
    Signalling TDM channel changes 失效
    信令TDM信道变化

    公开(公告)号：US07277452B2

    公开(公告)日：2007-10-02

    申请号：US10215895

    申请日：2002-08-09

    申请人： Geoffrey Edward Floyd ,  Timothy Michael Edmund Frost ,  James F. Kosolowski ,  Martin Raymond Scott

    发明人： Geoffrey Edward Floyd ,  Timothy Michael Edmund Frost ,  James F. Kosolowski ,  Martin Raymond Scott

    IPC分类号： H04J3/16 ,  H04L12/28 ,  H04Q7/00

    CPC分类号： H04L29/06

    摘要： A method of updating a lookup table associated with a TDM transmit unit which is coupled to a packet network to receive data therefrom, the lookup table mapping packet network contexts to TDM channels. The method includes priming a controller with data for updating the lookup table in advance of the receipt of packets containing data to which the update relates, incorporating a flag in each packet sent over the packet network to the TDM transmit unit, the flag being set to indicate whether or not a packet is the first packet to which the update relates, and detecting the setting of the flag in a first packet and in response updating the lookup table with the update data.

    摘要翻译： 一种更新与TDM发送单元相关联的查找表的方法，所述查找表耦合到分组网络以从其接收数据，所述查找表将分组网络上下文映射到TDM信道。 该方法包括在接收到包含与更新相关的数据的分组的接收之前更新查找表的数据的控制器，其中包括通过分组网络发送到TDM发送单元的每个分组中的标志，该标志被设置为 指示分组是否是更新涉及的第一分组，并且检测第一分组中的标志的设置，并且响应于使用更新数据更新查找表。

    Method and apparatus for distributing timing data across a packet network
    5.
    发明授权
    Method and apparatus for distributing timing data across a packet network 有权
    用于在分组网络上分发定时数据的方法和装置

    公开(公告)号：US07508843B2

    公开(公告)日：2009-03-24

    申请号：US10643129

    申请日：2003-08-18

    申请人： Timothy Michael Edmund Frost ,  Geoffrey Edward Floyd

    发明人： Timothy Michael Edmund Frost ,  Geoffrey Edward Floyd

    IPC分类号： H04J3/06

    CPC分类号： H04J3/0697

    摘要： A method for distributing timing information across a packet network includes generating timing signals at a master clock at predictable intervals using a clock reference of a given frequency. The timing signals are broadcast or multicast to a plurality of slave clocks over the packet network, preserving the timing signal intervals. At each slave clock, the intervals between successively received timing signals are determined. A clock recovery algorithm is applied to the determined intervals to recover in substantially real time the original clock frequency. The local clock frequency of the slave clock is synchronized to the recovered frequency.

    摘要翻译： 用于在分组网络上分配定时信息的方法包括使用给定频率的时钟参考以可预测的间隔在主时钟处产生定时信号。 定时信号通过分组网络广播或多播到多个从时钟，保持定时信号间隔。 在每个从时钟处，确定连续接收的定时信号之间的间隔。 将时钟恢复算法应用于所确定的间隔以基本上实时地恢复原始时钟频率。 从时钟的本地时钟频率与恢复的频率同步。

    Serial data transmitters
    6.
    发明授权
    Serial data transmitters 失效

    公开(公告)号：US07027455B2

    公开(公告)日：2006-04-11

    申请号：US10068593

    申请日：2002-02-05

    申请人： Geoffrey Edward Floyd

    发明人： Geoffrey Edward Floyd

    IPC分类号： H04L12/56

    CPC分类号： H04Q11/0421 ,  H04Q2213/13103 ,  H04Q2213/13292 ,  H04Q2213/13362

    摘要： A method of providing data for transmission on a time division multiplexed (TDM) serial data stream. The method comprises mapping channels of the TDM stream to contexts, each context comprising a set of memory buffers for storing data to be transmitted. Data is extracted from the contexts in a sequence defined by said mapping and transmitting the extracted data on the TDM stream. When a buffer or buffers of a context become empty, a buffer refill request is generated to cause data to be read from a memory to refill the buffer, wherein each buffer refill request is assigned a priority. The context buffers are refilled in an order defined by the respective priorities of the refill requests.