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    Method and apparatus for automatic protection switching
    1.
    发明授权
    Method and apparatus for automatic protection switching 失效
    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。

    Optical bit rate converter
    3.
    发明授权
    Optical bit rate converter 失效
    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。

    Optical bit rate converter
    4.
    发明授权
    Optical bit rate converter 失效
    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。

    Method for transparent multiplexing of SONET/ SDH streams
    6.
    发明授权
    Method for transparent multiplexing of SONET/ SDH streams 失效
    SONET / SDH流透明复用方法

    公开(公告)号：US06839871B2

    公开(公告)日：2005-01-04

    申请号：US09779190

    申请日：2001-02-08

    申请人： Naimish Patel ,  Richard A. Barry ,  Paolo Narvaez ,  Anthony Chi-Kong Kam

    发明人： Naimish Patel ,  Richard A. Barry ,  Paolo Narvaez ,  Anthony Chi-Kong Kam

    IPC分类号： H04J3/06 ,  H04J3/14 ,  H04Q11/04 ,  G06F11/00

    CPC分类号： H04J3/14 ,  H04J3/0602 ,  H04J2203/006 ,  H04J2203/0089 ,  H04Q11/0478

    摘要： Indicia are provided to a client of Out-of-Frame errors and message bit parity errors that occur during the transmission of a message through a network, wherein the message includes the client data multiplexed with other data and formatted into a message that includes a plurality of transport overhead bytes. The transport overhead bytes of the multiplexed can include both defined bytes and undefined bytes. Predetermined bytes in the transport overhead may be used to store indicia of errors that are detected during the message transmission. These predetermined bytes are read by the client at the egress of the network. The transport overhead may contain both a section overhead portion and a line overhead portion and the predetermined bytes may be encoded in either a subset of the section or line overhead bytes. In addition, the indicia of errors may be encoded in an undefined portion of the section or line overhead. Alternatively, a portion of the section or line overhead that is defined may be redefined and used to store the encoded error indicia

    Method for establishing connections by allocating links and channels
    7.
    发明授权
    Method for establishing connections by allocating links and channels 有权
    通过分配链路和信道建立连接的方法

    公开(公告)号：US06538777B1

    公开(公告)日：2003-03-25

    申请号：US09182692

    申请日：1998-10-29

    申请人： Richard A. Barry ,  Suresh Subramaniam

    发明人： Richard A. Barry ,  Suresh Subramaniam

    IPC分类号： H04J1402

    CPC分类号： H04J14/0283 ,  H04J14/0227 ,  H04J14/0241 ,  H04J14/0284

    摘要： A method of allocating channels and paths to connections along candidate channel-paths in a network, where a candidate channel-path comprises a candidate path and candidate channel along the candidate path, is performed by determining individual effects, on the network, of selecting candidate channel-paths. These include effects on at least one channel-path, other than a candidate channel-path, which shares links with the candidate path. Candidate channel-paths are selected based on the determined effects and allocated. In a preferred embodiment, determination of the effects on the network is based on path capacity. The embodiment can be used where a single connection has been requested, or alternatively, where multiple connections have been requested. A max-sum embodiment selects candidate channel-paths by first calculating a sum of path capacity-dependent values of a set of affected paths in the network for each of plural network states resulting from candidate channel-path allocations, and then selecting the candidate channel-paths yielding a maximum sum.

    摘要翻译： 一种在网络中沿着候选信道路径的连接分配信道和路径的方法，其中候选信道路径包括候选路径和候选路径的候选信道，是通过确定在网络上的选择候选的个体效应来执行的 通道路径。 这些包括对与候选路径共享链路的候选信道路径以外的至少一个信道路径的影响。 基于所确定的效果并分配候选信道路径。 在优选实施例中，对网络的影响的确定基于路径容量。 可以在已经请求单个连接的情况下使用该实施例，或者可选地，已经请求了多个连接。 最大和实施例通过首先计算由候选信道路径分配产生的多个网络状态中的每一个的网络中的一组受影响路径的路径容量相关值的和来选择候选信道路径，然后选择候选信道 产生最大和。

    Optical power balancer for optical amplified WDM networks
    8.
    发明授权
    Optical power balancer for optical amplified WDM networks 有权
    用于光放大WDM网络的光功率平衡器

    公开(公告)号：US06400479B1

    公开(公告)日：2002-06-04

    申请号：US09467607

    申请日：1999-12-20

    申请人： Jianying Zhou ,  Richard A. Barry ,  Naimish Patel

    发明人： Jianying Zhou ,  Richard A. Barry ,  Naimish Patel

    IPC分类号： H04B1000

    CPC分类号： H04J14/0221 ,  H04B10/07953 ,  H04B10/07955 ,  H04B10/296

    摘要： A wavelength division multiplexed (WDM) optical communications network is configured and operated to enable transmitter output power for a given wavelength channel to be adjusted to achieve a desired optical signal-to-noise ratio (OSNR) for the channel independently of the power levels of other optical signals carried on the same path. Optical amplifiers in the optical links extending between the transmitter and an optical receiver are configured to operate with constant gain over a specified range of input optical signal power, and the links are configured such that the power level of the signal provided to each optical amplifier is within the specified range of input signal power to prevent the deep saturation of the optical amplifiers due to optical amplifier cascading. When a channel is being added or adjusted, the OSNR of the optical communications signal received by the receiver is measured, and the power of the signal transmitted by the transmitter is adjusted to attain a desired OSNR at the receiver. Due to the constant-gain operation and input power control of the optical amplifiers, the OSNRs of other signals carried on the path are not affected, so that it is unnecessary to adjust the output power of other transmitters providing signals to the path.

    摘要翻译： 波分复用（WDM）光通信网络被配置和操作以使得能够调整给定波长信道的发射机输出功率，以实现与所述信道的功率电平无关的所述信道的期望的光信噪比（OSNR） 在同一路径上承载的其他光信号。 在发射器和光接收器之间延伸的光链路中的光放大器被配置为在指定的输入光信号功率范围内以恒定增益工作，并且链路被配置为使得提供给每个光放大器的信号的功率电平为 在指定范围内的输入信号功率，以防止由于光放大器级联而导致的光放大器的深度饱和。 当添加或调整频道时，测量由接收机接收的光通信信号的OSNR，并且调整由发射机发射的信号的功率以在接收机处获得期望的OSNR。 由于光放大器的恒定增益操作和输入功率控制，路径上承载的其他信号的OSNR不受影响，因此不需要调整向路径提供信号的其他发射机的输出功率。