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1. 发明授权

US6047331A Method and apparatus for automatic protection switching 失效
标题翻译：自动保护切换方法及装置
公开(公告)号：US6047331A
公开(公告)日：2000-04-04
申请号：US803169
申请日：1997-02-19
申请人： Muriel Medard , Steven G. Finn , Richard A. Barry , Robert G. Gallager
发明人： Muriel Medard , Steven G. Finn , Richard A. Barry , Robert G. Gallager
IPC分类号： H04L12/56 , H04L29/14 , G06F13/00
CPC分类号： H04L45/48 , H04L45/00 , H04L45/28 , H04L69/40
摘要： A method and apparatus for generating first and second tree topologies for any source node in a network which can be represented as a node or an edge redundant graph, such that any node in the graph remains connected to the source node via at least one tree even after the failure of a node or an edge. This technique provides a recovery mechanism upon detection of a failure in a network.
摘要翻译：一种用于为网络中的任何源节点生成可被表示为节点或边缘冗余图的第一和第二树拓扑的方法和装置，使得图中的任何节点仍然通过至少一棵树连接到源节点在节点或边缘发生故障之后。该技术在检测到网络中的故障时提供恢复机制。

2. 发明授权

US06728205B1 Method and apparatus for automatic protection switching 失效
标题翻译：自动保护切换方法及装置
公开(公告)号：US06728205B1
公开(公告)日：2004-04-27
申请号：US09018354
申请日：1998-02-04
申请人： Steven G. Finn , Muriel Medard , Richard A. Barry
发明人： Steven G. Finn , Muriel Medard , Richard A. Barry
IPC分类号： H04L1226
CPC分类号： H04L45/48 , H04L45/00 , H04L45/28 , H04L69/40
摘要： A Bi-directional Link Self-healing Network (BLSN) for implementing bi-directional link automatic protection switching (APS) for an arbitrary edge or node redundant network and a technique for implementing APS recovery in response to an edge or node failure in a network is described. The BLSN technique does not require permanent allocation of spare capacity for each connection and allows sharing of capacity among many network connections by allocating capacity for use only in the event of a failure. The described technique allows loopback protection to be performed over node or edge redundant networks and operates such that the remains connected after the failure of a node or an edge in the network. The technique makes use of connected directed subgraphs of the network. Also described are techniques for generating the directed subgraphs on node and edge redundant networks having an arbitrary network topology.
摘要翻译：用于实现任意边缘或节点冗余网络的双向链路自动保护倒换（APS）的双向链路自愈网络（BLSN）以及响应于网络边缘或节点故障实现APS恢复的技术被描述。 BLSN技术不需要为每个连接永久分配剩余容量，并且允许通过仅在发生故障时分配容量才能在许多网络连接之间共享容量。所描述的技术允许在节点或边缘冗余网络上执行环回保护，并且操作使得其在网络中的节点或边缘的故障之后保持连接。该技术利用网络的连接的定向子图。还描述了用于在具有任意网络拓扑的节点和边缘冗余网络上生成有向子图的技术。

3. 发明授权

US06175433B1 Optical bit rate converter 失效
标题翻译：光比特率转换器
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。

4. 发明授权

US06563895B2 Optical bit rate converter 失效
标题翻译：光比特率转换器
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。

5. 发明授权

US4560976A Data compression 失效
公开(公告)号：US4560976A
公开(公告)日：1985-12-24
申请号：US617241
申请日：1984-06-05
申请人： Steven G. Finn
发明人： Steven G. Finn
IPC分类号： H03K13/00
CPC分类号： H03M7/40
摘要： A stream of source characters, which occur with varying relative frequencies, is encoded into a compressed stream of codewords, each having one, two or three subwords, by ranking the source characters by their current frequency of appearance, encoding the source characters having ranks no higher than a first number as one sub-word codewords, source characters having ranks higher than the first number but no higher than a second number as two sub-word codewords, and the remaining source characters as three sub-word codewords. The first number is changed and the second number is recalculated as required by the changing frequencies of the source characters to minimize the length of the stream of codewords.

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