公开(公告)号：US07613213B2

公开(公告)日：2009-11-03

申请号：US11209230

申请日：2005-08-23

申请人： Pushkal Yadav ,  Kumar Shakti Singh ,  Chitra Wadhwa ,  Sachin Mathur ,  Ashis Maitra ,  Amandeep Singh Gujral ,  Diljit Singh ,  Yudhishthira Kundu

发明人： Pushkal Yadav ,  Kumar Shakti Singh ,  Chitra Wadhwa ,  Sachin Mathur ,  Ashis Maitra ,  Amandeep Singh Gujral ,  Diljit Singh ,  Yudhishthira Kundu

IPC分类号： H04J3/02

CPC分类号： H04J3/1611 ,  H04J3/04 ,  H04J3/0685

摘要： Time multiplexed processing of multiple SONET signals uses the same shared circuitry for framing, descrambling, maintenance signal processing, control byte processing and extraction, pointer tracking, retiming, and alarm indication. The signals are deserialized and multiplexed onto a byte-wide bus from which they are processed in a shared pipeline. Additional pipelines allow scaling up to higher capacity SONET signals. Each pipeline is provided with means for communicating with the other pipelines so that information derived from the processing of one stream can be shared with the processing of other streams when necessary. According to the presently preferred embodiment, bytes pass through the pipeline in five clock cycles.

摘要翻译： 多个SONET信号的时间复用处理使用相同的共享电路进行成帧，解扰，维护信号处理，控制字节处理和提取，指针跟踪，重定时和报警指示。 这些信号被反序列化并多路复用到一个字节宽的总线上，在共享流水线中处理这些信号。 额外的管道可以扩展到更高容量的SONET信号。 每个流水线都具有与其他流水线进行通信的装置，从而可以在需要时与其他流的处理共享来自一个流的处理的信息。 根据当前优选的实施例，字节在五个时钟周期内通过管线。

公开(公告)号：US06577651B2

公开(公告)日：2003-06-10

申请号：US09768430

申请日：2001-01-24

申请人： Kumar Shakti Singh ,  Pawan Goyal ,  Arnab Basak ,  Vikas Kumar ,  Daniel C. Upp

发明人： Kumar Shakti Singh ,  Pawan Goyal ,  Arnab Basak ,  Vikas Kumar ,  Daniel C. Upp

IPC分类号： H04J306

CPC分类号： H04J3/076 ,  H04J3/0623

摘要： Methods for retiming and realigning SONET signals include demultiplexing STS-1 signals from an STS-3 signal, buffering each of the three signals in a FIFO, determining the FIFO depth over time, determining a pointer leak rate based in part on FIFO depth and also based on the rate of received pointer movements. For a 28-byte deep FIFO, if the depth of a FIFO is 12-16 bytes, no pointer leaking is performed. If the depth is 0-4 bytes, an immediate positive leak is performed. If the depth is 24-28, an immediate negative leak is performed. If the depth is 5-11 bytes a calculated positive leak is performed. If the depth is 17-23 bytes, a calculated negative leak is performed. The calculated leak rates are based on the net number of pointer movements (magnitude of positive and negative movements summed) received every 32 seconds (256,000 frames).

公开(公告)号：US06775237B2

公开(公告)日：2004-08-10

申请号：US09912086

申请日：2001-03-29

申请人： Edward Soltysiak ,  Kumar Shakti Singh ,  Pawan Goyal

发明人： Edward Soltysiak ,  Kumar Shakti Singh ,  Pawan Goyal

IPC分类号： H04B7208

CPC分类号： H04J3/14 ,  H04J2203/006 ,  H04L1/20 ,  Y10S370/907

摘要： The excessive bit error rate detection algorithm operates in two modes: BURST mode and non-BURST mode. In non-BURST mode, an alarm state is entered if an error count exceeds a threshold within a set number of frames and exits the alarm state when the error count stays below a threshold for a set number of frames. In the BURST mode, the alarm state is not entered unless the error count exceeds the threshold two consecutive times and does not exit the alarm state unless the error rate remains below a threshold for two consecutive frame counts.

摘要翻译： 过度误码率检测算法以两种模式运行：BURST模式和非BURST模式。 在非BURST模式下，如果错误计数超过设定数量的帧中的阈值，则输入报警状态，并且当错误计数保持低于设定帧数的阈值时退出报警状态。 在BURST模式下，不输入报警状态，除非错误计数连续超过阈值，并且不会退出报警状态，除非错误率保持低于两个连续帧计数的阈值。