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    Passive Optical Fiber Plant Analysis
    1.
    发明申请
    Passive Optical Fiber Plant Analysis 有权
    被动光纤植物分析

    公开(公告)号：US20130322869A1

    公开(公告)日：2013-12-05

    申请号：US13483944

    申请日：2012-05-30

    申请人： Ryan E. HIRTH ,  Lowell D. Lamb

    发明人： Ryan E. HIRTH ,  Lowell D. Lamb

    IPC分类号： H04B10/08

    CPC分类号： H04B10/071 ,  H04B10/0771 ,  H04Q11/0067 ,  H04Q2011/0083 ,  H04Q2011/0086

    摘要： In a first aspect, the method and apparatus of the present disclosure can be used to periodically and/or intermittently place one or more ONUs attached to a PON in a power savings mode so that an OTDR test can be performed. While in the power savings mode, the ONUs temporarily suspend their transmitter function and power down their upstream lasers. In a second aspect, the method and apparatus of the present disclosure can be used to coordinate the performance of OTDR during one or more periodic or intermittent discovery slots used to detect and register ONUs recently connected to the PON. Because new ONUs are infrequently connected to the PON and ONUs already registered are not permitted to transmit during the discovery windows, OTDR can be performed during these windows without impacting, to a great degree, the normal operation of the PON.

    摘要翻译： 在第一方面，本公开的方法和装置可以用于周期性地和/或间歇地将附接到PON的一个或多个ONU放置在省电模式中，使得可以执行OTDR测试。 在省电模式下，ONU暂时中止其发射机功能并关闭其上行激光器。 在第二方面，本公开的方法和装置可以用于在用于检测和注册最近连接到PON的ONU的一个或多个周期性或间歇发现时隙期间协调OTDR的性能。 由于新的ONU不频繁地连接到PON，并且在发现窗口期间不允许发送已经注册的ONU，所以在这些窗口中可以执行OTDR，而在很大程度上不影响PON的正常操作。

    Method and system for mitigating Raman crosstalk in an Ethernet passive optical network
    2.
    发明授权
    Method and system for mitigating Raman crosstalk in an Ethernet passive optical network 有权
    以太网无源光网络中减轻拉曼串扰的方法和系统

    公开(公告)号：US07660528B2

    公开(公告)日：2010-02-09

    申请号：US11431342

    申请日：2006-05-09

    申请人： Ryan E. Hirth ,  Lowell D. Lamb ,  Glen Kramer ,  Benjamin J. Brown

    发明人： Ryan E. Hirth ,  Lowell D. Lamb ,  Glen Kramer ,  Benjamin J. Brown

    IPC分类号： H04J14/02 ,  H04B10/24

    CPC分类号： H04J14/0226 ,  H04B10/2537 ,  H04B10/27 ,  H04B10/272 ,  H04J14/02 ,  H04J14/0227 ,  H04J14/0232 ,  H04J14/0247 ,  H04J14/0252 ,  H04J14/028 ,  H04J14/0282 ,  H04J14/0283

    摘要： One embodiment of the present invention provides a system for mitigating Raman crosstalk between downstream data and video transmission in an Ethernet passive optical network (EPON), wherein the EPON includes an optical line terminal (OLT) and one or more optical network units (ONU's). During operation, the system transmits a data stream from the OLT to the ONU's on a first wavelength that is substantially at 1490 nm. The system also transmits a video signal stream from the OLT to the ONU's on a second wavelength that is substantially at 1550 nm. The system modifies the bit sequence for the data stream to change the power spectral distribution (PSD) for the data stream, thereby reducing power spectral content in the frequency range where significant Raman crosstalk can occur between data and video signal streams.

    摘要翻译： 本发明的一个实施例提供了一种用于减轻以太网无源光网络（EPON）中的下行数据和视频传输之间的拉曼串扰的系统，其中EPON包括光线路终端（OLT）和一个或多个光网络单元（ONU） 。 在运行期间，系统以基本上为1490nm的第一波长从OLT向ONU发送数据流。 该系统还将基于1550nm的第二波长的视频信号流从OLT发送到ONU。 该系统修改数据流的比特序列以改变数据流的功率谱分布（PSD），从而降低在数据和视频信号流之间可能出现显着的拉曼串扰的频率范围内的功率谱含量。

    Method and apparatus for facilitating asymmetric line rates in an Ethernet passive optical network
    3.
    发明授权
    Method and apparatus for facilitating asymmetric line rates in an Ethernet passive optical network 有权
    用于促进以太网无源光网络中的非对称线路速率的方法和装置

    公开(公告)号：US07525982B2

    公开(公告)日：2009-04-28

    申请号：US11228879

    申请日：2005-09-16

    申请人： Glen Kramer ,  Edward W. Boyd ,  Ryan E. Hirth ,  Lawrence D. Davis ,  Lowell D. Lamb

    发明人： Glen Kramer ,  Edward W. Boyd ,  Ryan E. Hirth ,  Lawrence D. Davis ,  Lowell D. Lamb

    IPC分类号： H04L12/28

    CPC分类号： H04J3/0652

    摘要： One embodiment of the present invention provides a method for facilitating asymmetric line rates in an Ethernet passive optical network (EPON) which includes a central node and at least one remote node. During operation, the system provides a downstream code-group clock, wherein each cycle thereof corresponds to a code group transmitted from the central node to a remote node. The system also provides an upstream code-group clock, wherein each cycle thereof corresponds to a code group received at the central node from a remote node. In addition, the system provides a multi-point control protocol (MPCP) clock, wherein the frequency ratio of the MPCP clock to the downstream code-group clock is different from the frequency ratio of the MPCP clock to the upstream code-group clock, thereby allowing the downstream transmission to be performed at a faster line rate than the upstream transmission line rate.

    摘要翻译： 本发明的一个实施例提供一种用于促进包括中央节点和至少一个远程节点的以太网无源光网络（EPON）中的非对称线路速率的方法。 在操作期间，系统提供下游代码组时钟，其中每个周期对应于从中央节点发送到远程节点的代码组。 该系统还提供上行代码组时钟，其中每个周期对应于从远程节点在中央节点接收的代码组。 另外，该系统提供多点控制协议（MPCP）时钟，其中MPCP时钟与下游码组时钟的频率比不同于MPCP时钟与上行代码组时钟的频率比， 从而允许以比上行传输线路速率更快的线路速率执行下游传输。

    Passive optical fiber plant analysis
    4.
    发明授权
    Passive optical fiber plant analysis 有权
    无源光纤工厂分析

    公开(公告)号：US08913887B2

    公开(公告)日：2014-12-16

    申请号：US13483944

    申请日：2012-05-30

    申请人： Ryan E. Hirth ,  Lowell D. Lamb

    发明人： Ryan E. Hirth ,  Lowell D. Lamb

    IPC分类号： H04B10/08

    CPC分类号： H04B10/071 ,  H04B10/0771 ,  H04Q11/0067 ,  H04Q2011/0083 ,  H04Q2011/0086

    摘要： In a first aspect, the method and apparatus of the present disclosure can be used to periodically and/or intermittently place one or more ONUs attached to a PON in a power savings mode so that an OTDR test can be performed. While in the power savings mode, the ONUs temporarily suspend their transmitter function and power down their upstream lasers. In a second aspect, the method and apparatus of the present disclosure can be used to coordinate the performance of OTDR during one or more periodic or intermittent discovery slots used to detect and register ONUs recently connected to the PON. Because new ONUs are infrequently connected to the PON and ONUs already registered are not permitted to transmit during the discovery windows, OTDR can be performed during these windows without impacting, to a great degree, the normal operation of the PON.

    摘要翻译： 在第一方面，本公开的方法和装置可以用于周期性地和/或间歇地将附接到PON的一个或多个ONU放置在省电模式中，使得可以执行OTDR测试。 在省电模式下，ONU暂时中止其发射机功能并关闭其上行激光器。 在第二方面，本公开的方法和装置可以用于在用于检测和注册最近连接到PON的ONU的一个或多个周期性或间歇发现时隙期间协调OTDR的性能。 由于新的ONU不频繁地连接到PON，并且在发现窗口期间不允许发送已经注册的ONU，所以在这些窗口中可以执行OTDR，而在很大程度上不影响PON的正常操作。