公开(公告)号：US06175433B1

公开(公告)日：2001-01-16

申请号：US08877339

申请日：1997-06-17

申请人： Naimish S. Patel ,  Katherine L. Hall ,  John D. Moores ,  Kristin A. Rauschenbach ,  Steven G. Finn ,  Richard A. Barry

发明人： Naimish S. Patel ,  Katherine L. Hall ,  John D. Moores ,  Kristin A. Rauschenbach ,  Steven G. Finn ,  Richard A. Barry

IPC分类号： H04J1408

CPC分类号： H04J14/08 ,  H04Q11/0003

摘要： An optical bit rate for communication systems. The optical bit rate converter converts an ultra-high speed optical data stream to a lower rate optical data stream. In one embodiment, the optical bit rate converter converts the ultra-high speed optical data stream to a lower rate optical data stream that can be detected and processed electronically. The optical rate converter includes a buffer presenting a repeating optical data bit pattern, an optical sampler presenting an optical sampling bit stream, and an optical correlator. The optical correlator has a first input in communication with the output of the buffer and a second input in communication with the output of the optical sampler. The optical correlator produces a rate-converted optical data bit stream at its output in response to the repeating optical data bit pattern produced by the buffer and the optical sampling bit stream produced by the optical sampler. In one embodiment, the buffer has a data input and stores an optical data bit stream received from a high speed optical data source. In another embodiment, the optical bit rate converter time dilates the repeating optical data bit pattern received from the buffer. In yet another embodiment, the optical bit rate converter demultiplexes the repeating optical data bit pattern received from the buffer. The invention also relates to a method for rate-converting an ultra-high speed optical data stream to a lower rate optical data stream.

摘要翻译： 通信系统的光比特率。 光比特率转换器将超高速光数据流转换成较低速率的光数据流。 在一个实施例中，光比特率转换器将超高速光数据流转换成可以电子检测和处理的较低速光学数据流。 光速率转换器包括呈现重复光数据位模式的缓冲器，呈现光采样位流的光采样器和光相关器。 光学相关器具有与缓冲器的输出通信的第一输入和与光学采样器的输出通信的第二输入。 光相关器响应于由缓冲器产生的重复光数据位模式和由光采样器产生的光采样位流，在其输出端产生速率转换的光数据比特流。 在一个实施例中，缓冲器具有数据输入并存储从高速光学数据源接收的光学数据比特流。 在另一实施例中，光比特率转换器时间扩大从缓冲器接收的重复光数据位模式。 在另一个实施例中，光比特率转换器解复用从缓冲器接收的重复光数据位模式。 本发明还涉及一种用于将超高速光数据流速率转换为较低速光学数据流的方法。

公开(公告)号：US06563895B2

公开(公告)日：2003-05-13

申请号：US09740241

申请日：2000-12-18

申请人： Naimish S. Patel ,  Katherine L. Hall ,  John D. Moores ,  Kristin A. Rauschenbach ,  Steven G. Finn ,  Richard A. Barry

发明人： Naimish S. Patel ,  Katherine L. Hall ,  John D. Moores ,  Kristin A. Rauschenbach ,  Steven G. Finn ,  Richard A. Barry

IPC分类号： H04L700

CPC分类号： H04Q11/0003 ,  H04J14/08

摘要： An optical bit rate for communication systems. The optical bit rate converter converts an ultra-high speed optical data stream to a lower rate optical data stream. In one embodiment, the optical bit rate converter converts the ultra-high speed optical data stream to a lower rate optical data stream that can be detected and processed electronically. The optical rate converter includes a buffer presenting a repeating optical data bit pattern, an optical sampler presenting an optical sampling bit stream, and an optical correlator. The optical correlator has a first input in communication with the output of the buffer and a second input in communication with the output of the optical sampler. The optical correlator produces a rate-converted optical data bit stream at its output in response to the repeating optical data bit pattern produced by the buffer and the optical sampling bit stream produced by the optical sampler. In one embodiment, the buffer has a data input and stores an optical data bit stream received from a high speed optical data source. In another embodiment, the optical bit rate converter time dilates the repeating optical data bit pattern received from the buffer. In yet another embodiment, the optical bit rate converter demultiplexes the repeating optical data bit pattern received from the buffer. The invention also relates to a method for rate-converting an ultra-high speed optical data stream to a lower rate optical data stream.

摘要翻译： 通信系统的光比特率。 光比特率转换器将超高速光数据流转换成较低速率的光数据流。 在一个实施例中，光比特率转换器将超高速光数据流转换成可以电子检测和处理的较低速光学数据流。 光速率转换器包括呈现重复光数据位模式的缓冲器，呈现光采样位流的光采样器和光相关器。 光学相关器具有与缓冲器的输出通信的第一输入和与光学采样器的输出通信的第二输入。 光相关器响应于由缓冲器产生的重复光数据位模式和由光采样器产生的光采样位流，在其输出端产生速率转换的光数据比特流。 在一个实施例中，缓冲器具有数据输入并存储从高速光学数据源接收的光学数据比特流。 在另一实施例中，光比特率转换器时间扩大从缓冲器接收的重复光数据位模式。 在另一个实施例中，光比特率转换器解复用从缓冲器接收的重复光数据位模式。 本发明还涉及一种用于将超高速光数据流速率转换为较低速光学数据流的方法。

公开(公告)号：US06563837B2

公开(公告)日：2003-05-13

申请号：US09021245

申请日：1998-02-10

申请人： Pattabhiraman Krishna ,  Naimish S. Patel ,  Anna Charny ,  Robert J. Simcoe

发明人： Pattabhiraman Krishna ,  Naimish S. Patel ,  Anna Charny ,  Robert J. Simcoe

IPC分类号： H04L1256

CPC分类号： H04L12/5601 ,  H04L49/1576 ,  H04L49/3081 ,  H04L2012/5652 ,  H04L2012/5679 ,  H04L2012/5681 ,  H04Q11/0478

摘要： A switching method and apparatus operates as a work conserving network device. An arbiter using an arbitration algorithm controls a switch fabric interconnecting input ports and output ports. To switch cells, a virtual output queue of an input port is selected that corresponds to an output port with a lowest occupancy rating and a request is sent to this output port. In a greedy version of the algorithm, input ports may send requests to the lowest occupied output port for which they have a cell. In a non-greedy version, requests may only be sent if that input port has a cell for the lowest occupied output port in the entire network device. An output port that receives one or more requests from input ports uses an input port selection algorithm to select an input port from which to receive a packet. After as many input and output ports are matched as is possible in a phase, the packets for those matched ports are transferred across the switch. The switch fabric operates with a speedup of only twice that of the input port data rates and is still work conserving.

摘要翻译： 切换方法和装置作为工作节省网络设备进行操作。 使用仲裁算法的仲裁器控制互连输入端口和输出端口的交换结构。 为了切换单元，选择与具有最低占用额定值的输出端口对应的输入端口的虚拟输出队列，并且向该输出端口发送请求。 在算法的贪心版本中，输入端口可以将请求发送到它们具有单元的最低占用输出端口。 在非贪心版本中，如果该输入端口在整个网络设备中具有用于最低占用输出端口的单元，则只能发送请求。 从输入端口接收一个或多个请求的输出端口使用输入端口选择算法来选择从其接收分组的输入端口。 在一个阶段中尽可能多地匹配输入和输出端口，这些匹配端口的数据包将通过交换机传输。 交换结构的加速速度仅为输入端口数据速率的两倍，并且仍然保持工作。