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。

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。

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。

公开(公告)号：US08498534B2

公开(公告)日：2013-07-30

申请号：US12577608

申请日：2009-10-12

申请人： Ryan E. Hirth ,  Edward W. Boyd ,  Sanjay Goswami

发明人： Ryan E. Hirth ,  Edward W. Boyd ,  Sanjay Goswami

IPC分类号： H04B10/08 ,  H04B10/20 ,  H04J14/00

CPC分类号： H04J14/0221 ,  H04B10/27 ,  H04J14/0282 ,  H04Q11/0067 ,  H04Q2011/0079

摘要： One embodiment provides a system for power saving in an Ethernet Passive Optic Network (EPON). The system includes an optical line terminal (OLT), an optical network unit (ONU), a traffic-detection module configured to detect status of traffic to and from the ONU, and a power-management module configured to place the ONU in sleep mode based on the detected traffic status. The ONU includes an optical transceiver that includes an optical transmitter configured to transmit optical signals to the OLT and an optical receiver configured to receive optical signals from the OLT.

摘要翻译： 一个实施例提供了一种用于以太网无源光网络（EPON）中的功率节省的系统。 该系统包括光线路终端（OLT），光网络单元（ONU），被配置为检测来自ONU的业务的状态的流量检测模块以及被配置为将ONU置于睡眠模式的电源管理模块 基于检测到的流量状态。 ONU包括光收发器，其包括被配置为向OLT发送光信号的光发射机和被配置为从OLT接收光信号的光接收机。

公开(公告)号：US20110170868A1

公开(公告)日：2011-07-14

申请号：US13073525

申请日：2011-03-28

申请人： Edward W. BOYD ,  Ryan E. Hirth ,  Hung Nguyen

发明人： Edward W. BOYD ,  Ryan E. Hirth ,  Hung Nguyen

IPC分类号： H04B10/20

CPC分类号： H04J3/0638 ,  H04J3/0652 ,  H04J3/0682 ,  H04J3/07 ,  H04J3/1694 ,  H04Q11/0067 ,  H04Q2011/0079

摘要： One embodiment of the present invention provides a system that accommodates different clock frequencies in an Ethernet passive optical network (EPON). The system receives a signal from an optical line terminal (OLT) at an optical network unit (ONU) and derives an OLT clock. The system also maintains a local clock. The system further receives from the OLT an assignment for an upstream transmission window, during which the ONU can transmit an upstream data burst to the OLT based on the local clock. The system adjusts the number of bits of the data burst without affecting the payload data carried in the data burst, thereby allowing the data burst to fit properly within the upstream transmission window and compensating for frequency differences between the local clock and the OLT clock. The system transmits the data burst based on the local clock in the upstream transmission window.

摘要翻译： 本发明的一个实施例提供一种在以太网无源光网络（EPON）中适应不同时钟频率的系统。 该系统从光网络单元（ONU）的光线路终端（OLT）接收信号，得到OLT时钟。 该系统还维护本地时钟。 该系统还从OLT接收用于上行传输窗口的分配，在该传输窗口期间，ONU可以基于本地时钟向OLT发送上行数据突发。 该系统调整数据脉冲串的位数，而不影响数据脉冲串中承载的有效载荷数据，从而允许数据脉冲串适配于上游传输窗口内，并补偿本地时钟与OLT时钟之间的频率差异。 系统根据上行传输窗口中的本地时钟传输数据脉冲串。

公开(公告)号：US08588257B2

公开(公告)日：2013-11-19

申请号：US13073525

申请日：2011-03-28

申请人： Edward W. Boyd ,  Ryan E. Hirth ,  Hung Nguyen

发明人： Edward W. Boyd ,  Ryan E. Hirth ,  Hung Nguyen

IPC分类号： H04J3/06

CPC分类号： H04J3/0638 ,  H04J3/0652 ,  H04J3/0682 ,  H04J3/07 ,  H04J3/1694 ,  H04Q11/0067 ,  H04Q2011/0079

摘要： One embodiment of the present invention provides a system that accommodates different clock frequencies in an Ethernet passive optical network (EPON). The system receives a signal from an optical line terminal (OLT) at an optical network unit (ONU) and derives an OLT clock. The system also maintains a local clock. The system further receives from the OLT an assignment for an upstream transmission window, during which the ONU can transmit an upstream data burst to the OLT based on the local clock. The system adjusts the number of bits of the data burst without affecting the payload data carried in the data burst, thereby allowing the data burst to fit properly within the upstream transmission window and compensating for frequency differences between the local clock and the OLT clock. The system transmits the data burst based on the local clock in the upstream transmission window.

摘要翻译： 本发明的一个实施例提供一种在以太网无源光网络（EPON）中适应不同时钟频率的系统。 该系统从光网络单元（ONU）的光线路终端（OLT）接收信号，得到OLT时钟。 该系统还维护本地时钟。 该系统还从OLT接收用于上行传输窗口的分配，在该传输窗口期间，ONU可以基于本地时钟向OLT发送上行数据突发。 该系统调整数据脉冲串的位数，而不影响数据脉冲串中承载的有效载荷数据，从而允许数据脉冲串适配于上游传输窗口内，并补偿本地时钟与OLT时钟之间的频率差异。 系统根据上行传输窗口中的本地时钟传输数据脉冲串。

公开(公告)号：US20110142443A1

公开(公告)日：2011-06-16

申请号：US12967799

申请日：2010-12-14

申请人： Ryan E. Hirth ,  Jaroslaw Wojtowicz

发明人： Ryan E. Hirth ,  Jaroslaw Wojtowicz

IPC分类号： H04B10/08 ,  H04B10/00 ,  H04L9/08

CPC分类号： H04B10/69 ,  H04J3/0682 ,  H04J3/1694 ,  H04J14/08

摘要： A system to convert upstream burst mode data into continuous mode data in a passive optical network (PON) is provided herein. The system includes a burst mode Serializer/Deserializer (SerDes) that recovers a clock and burst mode data from an Optical Network Unit (ONU). The burst mode unit recovers the burst mode data based on a start time of burst mode data transmission by the ONU and a round-trip time between the ONU and an Optical Line Terminal (OLT). The system further includes a continuous mode SerDes that is coupled to the burst mode SerDes. The continuous mode SerDes is configured to receive the recovered clock and recovered burst mode data from the burst mode SerDes and convert the burst mode data into continuous mode data by buffering and padding the burst mode data based on the recovered clock. The continuous mode Serdes is configured to transmit the continuous mode data to the OLT.

摘要翻译： 本文提供了一种在无源光网络（PON）中将上游突发模式数据转换为连续模式数据的系统。 该系统包括从光网络单元（ONU）恢复时钟和突发模式数据的突发模式串行器/解串器（SerDes）。 突发模式单元基于ONU的突发模式数据传输的开始时间和ONU与光线路终端（OLT）之间的往返时间，恢复突发模式数据。 该系统还包括耦合到突发模式SerDes的连续模式SerDes。 连续模式SerDes被配置为从突发模式SerDes接收恢复的时钟和恢复的突发模式数据，并且通过基于恢复的时钟缓冲和填充突发模式数据将突发模式数据转换为连续模式数据。 连续模式SerDes被配置为将连续模式数据发送到OLT。

公开(公告)号：US20100254706A1

公开(公告)日：2010-10-07

申请号：US12749285

申请日：2010-03-29

申请人： Ryan E. Hirth ,  Edward W. Boyd

发明人： Ryan E. Hirth ,  Edward W. Boyd

IPC分类号： H04J14/00

CPC分类号： H04Q11/0067 ,  H04J14/0239 ,  H04J14/0246 ,  H04J14/0247 ,  H04J14/025 ,  H04J14/0252 ,  H04J14/026 ,  H04J14/0282 ,  H04Q2011/0064

摘要： One embodiment of the present invention provides an optical line terminal (OLT) in an Ethernet passive optical network (EPON). The OLT includes a number of bi-direction optical transceivers. At least one bi-direction optical transceiver is coupled to an optical network unit (ONU) group that includes a number of ONUs. The OLT further includes a first downstream media access control (MAC) interface configured to provide a first downstream control signal and a splitter configured to split the first downstream control signal to a number of sub-signals. At least one sub-signal is configured to control downstream transmission of a corresponding bi-direction optical transceiver to a corresponding ONU-group.

摘要翻译： 本发明的一个实施例提供了一种以太网无源光网络（EPON）中的光线路终端（OLT）。 OLT包括多个双向光收发器。 至少一个双向光收发器耦合到包括多个ONU的光网络单元（ONU）组。 OLT还包括被配置为提供第一下游控制信号的第一下游媒体访问控制（MAC）接口和被配置为将第一下游控制信号分割成多个子信号的分离器。 至少一个子信号被配置为控制对应的双向光收发器到对应的ONU组的下行传输。

公开(公告)号：US07590139B2

公开(公告)日：2009-09-15

申请号：US11385431

申请日：2006-03-20

申请人： Edward W. Boyd ,  Ryan E. Hirth ,  Duncan C. Gray ,  Sourigno Outsama

发明人： Edward W. Boyd ,  Ryan E. Hirth ,  Duncan C. Gray ,  Sourigno Outsama

IPC分类号： H04B7/212

CPC分类号： H04Q11/0067 ,  H04Q2011/0064

摘要： One embodiment of the present invention provides a system for accommodating time-division multiplexing (TDM) traffic in an Ethernet passive optical network (EPON). During operation, the system receives data from an upstream TDM channel at a remote node and stores received data in a segmentation buffer. The system encapsulates the data stored in the segmentation buffer into a packet. The system receives a message from the central node granting a TDM transmission window starting at a designated time. The system further communicates the packet to an upstream transmission mechanism within the remote node before the designated time, and transmits to the central node an upstream frame containing the packet at the designated time.

摘要翻译： 本发明的一个实施例提供一种用于在以太网无源光网络（EPON）中适应时分复用（TDM）业务的系统。 在操作期间，系统从远程节点的上游TDM信道接收数据，并将接收的数据存储在分段缓冲器中。 系统将存储在分段缓冲器中的数据封装成一个数据包。 系统从指定的时间开始从中央节点接收授予TDM传输窗口的消息。 该系统进一步在指定时间之前将分组传送到远程节点内的上行传输机制，并在指定时间向中央节点发送包含分组的上行帧。

公开(公告)号：US07152199B2

公开(公告)日：2006-12-19

申请号：US10866399

申请日：2004-06-12

申请人： Hung C. Nuyen ,  Glen Kramer ,  Ryan E. Hirth

发明人： Hung C. Nuyen ,  Glen Kramer ,  Ryan E. Hirth

IPC分类号： H03M13/00

CPC分类号： H04L1/0083 ,  H04L1/0057 ,  H04L7/048

摘要： One embodiment of the present invention provides a system that facilitates construction of a forward error correction (FEC) coded Ethernet frame. The system generates a number of FEC parity bits for the conventional Ethernet frame and inserts a start sequence before the conventional Ethernet frame. Next, the system appends an even- or odd-delimiter to the conventional Ethernet frame. The even-delimiter and the odd-delimiter are selected such that there is a sufficiently large Hamming distance between them, thereby reducing the probability of mistaking the even-delimiter for the odd-delimiter, or mistaking the odd-delimiter for the even-delimiter, if bit error occurs.

摘要翻译： 本发明的一个实施例提供了一种有助于构建前向纠错（FEC）编码以太网帧的系统。 该系统为常规以太网帧生成多个FEC奇偶校验位，并在常规以太网帧之前插入起始序列。 接下来，系统将偶数或奇数分隔符附加到常规以太网帧。 偶数分隔符和奇数分隔符被选择为使得它们之间具有足够大的汉明距离，从而减少了奇数分隔符的偶数分隔符错误的概率，或者将奇数分隔符误认为偶分隔符 ，如果发生位错误。