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：US20090262937A1

公开(公告)日：2009-10-22

申请号：US12414963

申请日：2009-03-31

申请人： Ryan E. Hirth ,  Edward W. Boyd ,  Ngo Thanh Ho

发明人： Ryan E. Hirth ,  Edward W. Boyd ,  Ngo Thanh Ho

IPC分类号： H04L9/00 ,  H04L9/28

CPC分类号： H04L9/12 ,  H04L9/0838 ,  H04L9/0891 ,  H04L63/0428

摘要： One embodiment provides a system for decrypting data frames in an Ethernet passive optical network (EPON). During operation, the system maintains a local cipher counter at a local node, and receives from a remote node a data frame which is encrypted based on a remote input block and a session key. The remote input block is constructed based on the remote cipher counter and a remote block counter. The system updates the local cipher counter based on a received field located in a preamble of the data frame, truncates the local cipher counter by discarding a number of least significant bits, and constructs for the received data frame a local input block based on the truncated local cipher counter, the received field, and a local block counter. The system then decrypts the data frame based on the local input block and the session key.

摘要翻译： 一个实施例提供一种用于对以太网无源光网络（EPON）中的数据帧进行解密的系统。 在操作期间，系统在本地节点维护本地密码计数器，并从远程节点接收基于远程输入块和会话密钥加密的数据帧。 远程输入块基于远程密码计数器和远程块计数器构建。 该系统基于位于数据帧的前导码中的接收字段来更新本地密码计数器，通过舍弃最少有效位数来截断本地密码计数器，并且基于被截断的数据帧为接收到的数据帧构造本地输入块 本地密码计数器，接收字段和本地块计数器。 然后，系统基于本地输入块和会话密钥解密数据帧。

公开(公告)号：US07349537B2

公开(公告)日：2008-03-25

申请号：US11078923

申请日：2005-03-10

申请人： Glen Kramer ,  Lawrence D. Davis ,  Edward W. Boyd ,  Ryan E. Hirth ,  Ngo Thahn Ho

发明人： Glen Kramer ,  Lawrence D. Davis ,  Edward W. Boyd ,  Ryan E. Hirth ,  Ngo Thahn Ho

IPC分类号： H04K1/00 ,  H04L9/00 ,  H04L9/28 ,  H04J14/00

CPC分类号： H04L9/12 ,  H04L9/0637

摘要： One embodiment of the present invention provides a system that decrypts downstream data in an Ethernet passive optical network (EPON). During operation, the system receives a data frame which is encrypted based on a remote input block and a session key, wherein the remote input block is constructed based on a remote cipher counter and a remote block counter. The system adjusts a local cipher counter based on a received checksum located in a preamble of the data frame, wherein the local cipher counter is substantially synchronized with the remote cipher counter. In addition, the system truncates the local cipher counter by discarding n least significant bits thereof. The system then constructs a local input block based on the truncated cipher counter and a local block counter for the received data frame. Next, the system decrypts the data frame based on the local input block and the session key.

摘要翻译： 本发明的一个实施例提供一种解密以太网无源光网络（EPON）中的下游数据的系统。 在操作期间，系统接收基于远程输入块和会话密钥加密的数据帧，其中基于远程密码计数器和远程块计数器构建远程输入块。 该系统基于位于数据帧的前导码中的接收到的校验和来调整本地密码计数器，其中本地密码计数器基本上与远程密码计数器同步。 此外，系统通过丢弃其最低有效位来截断本地密码计数器。 然后，系统基于截断的密码计数器和接收到的数据帧的本地块计数器构建本地输入块。 接下来，系统基于本地输入块和会话密钥来解密数据帧。

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：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。

公开(公告)号：US06222876B1

公开(公告)日：2001-04-24

申请号：US08994866

申请日：1997-12-19

申请人： Ryan E. Hirth ,  Ruchi Wadhawan

发明人： Ryan E. Hirth ,  Ruchi Wadhawan

IPC分类号： H04B346

CPC分类号： H04L25/03885

摘要： A method for tuning an adaptive equalizer in order to receive digital signals from a transmission medium both coarse and fine tuning methods to adaptively equalize a signal received from the transmission medium. The coarse tuning method adjusts an equalizer such that the post equalized signal starts to resemble a known data pattern, such as an MLT3 data pattern. The coarse tuning method monitors and corrects for several things: illegal transitions, over equalization, statistical data pattern anomalies and saturation conditions. Fine tuning methods operate concurrently with the coarse tuning methods and function from the point at which the coarse tuning methods stop being efficient. Additionally, the fine tuning methods hold the waveform locked in. In addition to coarse tuning and fine tuning of the equalizer, the present invention also adjusts gain of the overall signal such that the post equalized signal is always a certain amplitude. It also corrects for offsets that may get superimposed on the signal as it passes through the receive channel and which may lead to erroneous bit decisions. The method is applicable to a variety of data communication standards including 100 Base-X, FDDI and ATM-155.

摘要翻译： 一种用于调谐自适应均衡器以便从传输介质接收数字信号的方法，用于粗调和微调方法以自适应均衡从传输介质接收的信号。 粗调方法调整均衡器，使得后均衡信号开始类似于已知数据模式，例如MLT3数据模式。 粗调方法监视和纠正以下几件事情：非法转换，过均衡，统计数据模式异常和饱和条件。 微调方法与粗调方法和功能从粗调方式停止有效的角度同时运行。 此外，微调方法保持波形锁定。除了均衡器的粗调和微调外，本发明还调整总体信号的增益，使得后均衡信号总是一定的幅度。 它还可以纠正在信号通过接收通道时可能会叠加在信号上的偏移量，并可能导致错误的位决定。 该方法适用于各种数据通信标准，包括100 Base-X，FDDI和ATM-155。

公开(公告)号：US09450705B2

公开(公告)日：2016-09-20

申请号：US12828568

申请日：2010-07-01

申请人： Ryan E. Hirth

发明人： Ryan E. Hirth

IPC分类号： H04L1/00 ,  H03M13/33

CPC分类号： H04L1/0083 ,  H03M13/333 ,  H04L1/0045

摘要： Embodiments of the present invention provide a system that identifies an even delimiter in a forward error correction (FEC)-coded Ethernet frame. The system receives an FEC-coded Ethernet frame that includes the even delimiter, which is a predetermined sequence that separates a conventional Ethernet frame and FEC parity bits in the FEC-coded Ethernet frame. Next, the system scans a bit stream of the FEC-coded Ethernet frame. Then, the system determines a first Hamming distance between a first consecutive set of frame bits in the bit stream and the even delimiter. The system also determines a second Hamming distance between a second consecutive set of frame bits in the bit stream and the even delimiter. Both the first and second Hamming distances are shorter than a predefined value. The system subsequently selects one of the first and second sets of frame bits having the shorter Hamming distance as the even delimiter.

摘要翻译： 本发明的实施例提供了一种在前向纠错（FEC）编码的以太网帧中识别偶数定界符的系统。 该系统接收FEC编码的以太网帧，其包括均衡定界符，该分隔符是将FEC编码以太网帧中的常规以太网帧和FEC奇偶校验位分离的预定序列。 接下来，系统扫描FEC编码以太网帧的比特流。 然后，系统确定比特流中的第一连续帧比特和偶数分隔符之间的第一汉明距离。 系统还确定比特流中的第二连续帧比特和偶数分隔符之间的第二汉明距离。 第一和第二汉明距离都比预定值短。 该系统随后选择具有较短汉明距离的第一和第二组帧比特中的一个作为偶数分隔符。

公开(公告)号：US08494364B2

公开(公告)日：2013-07-23

申请号：US12574920

申请日：2009-10-07

申请人： Glen Kramer ,  Joshua L. Feinstein ,  Ryan E. Hirth

发明人： Glen Kramer ,  Joshua L. Feinstein ,  Ryan E. Hirth

IPC分类号： H04B10/20 ,  H04J14/00

CPC分类号： H04L47/10 ,  H04B10/0773 ,  H04L47/22 ,  H04L47/2408 ,  H04Q11/0067 ,  H04Q2011/0064 ,  H04Q2011/0084

摘要： One embodiment provides a system for controlling flow rate in an EPON. The system includes an OLT, an ONUs coupled to the OLT via a passive optical splitter, a switch coupled to a port located on the ONU, and a flow-control mechanism. The ONU includes one or more queues corresponding to one or more classes of Services, and one or more ports. The switch includes a plurality of UNI ports, and the switch is configured to switch one or more upstream traffic flows belonging to the one or more classes of services from the plurality of UNI ports. The flow-control mechanism is configured to set a flow rate of an upstream traffic flow of certain class of service originated from a UNI port. The flow-control mechanism sets the flow rate based on status of an ONU queue corresponding to the class of service of the upstream traffic flow.

摘要翻译： 一个实施例提供了一种用于控制EPON中的流量的系统。 该系统包括OLT，经由无源光分路器耦合到OLT的ONU，耦合到位于ONU上的端口的开关和流控制机构。 ONU包括与一个或多个服务类别对应的一个或多个队列，以及一个或多个端口。 所述交换机包括多个UNI端口，并且所述交换机被配置为从所述多个UNI端口切换属于所述一个或多个服务类别的一个或多个上游业务流。 流控制机制被配置为设置从UNI端口发起的某一类业务的上行业务流的流量。 流量控制机制根据与上游业务流的业务类别对应的ONU队列的状态设置流量。

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：US08565605B2

公开(公告)日：2013-10-22

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： H04J14/08 ,  H04B10/00

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。