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    Method and apparatus for facilitating differentiated service qualities in an ethernet passive optical network
    1.
    发明授权
    Method and apparatus for facilitating differentiated service qualities in an ethernet passive optical network 失效
    用于以太网无源光网络中促进差异化服务质量的方法和装置

    公开(公告)号：US07664019B2

    公开(公告)日：2010-02-16

    申请号：US11223487

    申请日：2005-09-08

    申请人： Edward W. Boyd ,  Thyagarajan Subramanian ,  Lawrence D. Davis

    发明人： Edward W. Boyd ,  Thyagarajan Subramanian ,  Lawrence D. Davis

    IPC分类号： H04L12/56 ,  H04B10/20

    CPC分类号： H04L47/10 ,  H04L12/4641 ,  H04L41/5003 ,  H04L41/5022 ,  H04L47/15 ,  H04L47/2408 ,  H04L47/2425 ,  H04L47/2491

    摘要： One embodiment of the present invention provides a system for forwarding packets in an Ethernet passive optical network (EPON) which includes a central node and at least one remote node. During operation, the system associates a logical link identifier (LLID) to a logical link between the central node and a remote node, wherein the logical link corresponds to a priority level based on a certain service level agreement (SLA). After receiving a packet to be forwarded to a remote node, the system then determines the value of one or more fields within the packet which is used to indicate a priority level for the packet. Subsequently, the system assigns an LLID to the packet based on the value of the one or more fields, thereby facilitating differentiated service qualities within the EPON.

    摘要翻译： 本发明的一个实施例提供了一种用于在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）中转发分组的系统。 在操作期间，系统将逻辑链路标识符（LLID）与中心节点和远程节点之间的逻辑链路相关联，其中逻辑链路基于特定服务级别协议（SLA）对应于优先级。 在接收到要转发到远程节点的分组之后，系统然后确定用于指示分组的优先级的分组内的一个或多个字段的值。 随后，系统基于一个或多个字段的值向该分组分配LLID，从而促进EPON内的差异化服务质量。

    Method and system for protection switching in ethernet passive optical networks
    4.
    发明授权
    Method and system for protection switching in ethernet passive optical networks 有权
    以太网无源光网络保护倒换方法及系统

    公开(公告)号：US09319758B2

    公开(公告)日：2016-04-19

    申请号：US12565680

    申请日：2009-09-23

    申请人： Sanjay Goswami ,  Lawrence D. Davis ,  Edward W. Boyd

    发明人： Sanjay Goswami ,  Lawrence D. Davis ,  Edward W. Boyd

    IPC分类号： H04B10/032 ,  H04Q11/00 ,  H04B10/272

    CPC分类号： H04Q11/0067 ,  H04B10/032 ,  H04B10/272 ,  H04J2203/006 ,  H04Q2011/0081

    摘要： One embodiment provides a system that performs protection switching in an Ethernet passive optical network (EPON), which includes an optical line terminal (OLT) and at least one optical network unit (ONU). The system is configured with at least one redundant component for the OLT and/or ONUs, wherein the redundant component can be optical or electrical, and can be a port, line card or link. The system provides protection by detecting a failure, and switching automatically to the redundant components to reduce service disruption time. The protection switching comprises: preserving the existing configuration over the loss of at least one of a multiple-point control protocol (MPCP) message; an operations, administration and maintenance (OAM) message; and a signal on the physical layer. The system recovers from the failure without performing ONU discovery.

    摘要翻译： 一个实施例提供一种在包括光线路终端（OLT）和至少一个光网络单元（ONU）的以太网无源光网络（EPON）中执行保护切换的系统。 该系统配置有用于OLT和/或ONU的至少一个冗余组件，其中冗余组件可以是光学的或电的，并且可以是端口，线路卡或链路。 该系统通过检测故障提供保护，并自动切换到冗余组件以减少服务中断时间。 所述保护切换包括：通过丢失多点控制协议（MPCP）消息中的至少一个来保留现有配置; 操作，管理和维护（OAM）消息; 和物理层上的信号。 系统从故障中恢复，无需执行ONU发现。

    Method and apparatus for facilitating asymmetric line rates in an Ethernet passive optical network
    5.
    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。

    Method and apparatus for forwarding packets in an ethernet passive optical network
    6.
    发明授权
    Method and apparatus for forwarding packets in an ethernet passive optical network 有权
    用于在以太网无源光网络中转发数据包的方法和装置

    公开(公告)号：US06967949B2

    公开(公告)日：2005-11-22

    申请号：US10925175

    申请日：2004-08-23

    申请人： Lawrence D. Davis ,  Edward W. Boyd ,  Glen Kramer

    发明人： Lawrence D. Davis ,  Edward W. Boyd ,  Glen Kramer

    IPC分类号： H04Q11/00 ,  H04L12/56

    CPC分类号： H04L12/2856 ,  H04L12/2861 ,  H04L12/4641 ,  H04L12/4645 ,  H04L12/467 ,  H04Q11/0066 ,  H04Q11/0067 ,  H04Q11/0071

    摘要： One embodiment of the present invention provides a system that facilitates forwarding of packets in an Ethernet passive optical network (EPON), which includes a central node and at least one remote node. During operation, the system assigns a logical link identifier (LLID) to a remote node, wherein an LLID corresponds to a logical link between the central node and a remote node. The system also associates an LLID with a port of a switch within the central node, wherein the switch has a number of ports; wherein a port may be a physical port or a virtual port; and wherein the number of ports on the switch are divided into network-side ports and user-side ports. Upon receiving a downstream packet from a network-side port, the system searches a mapping table to determine whether one or more field values of the downstream packet correspond to any LLIDs or ports. If the one or more field values correspond to an LLID, the system assigns the LLID to the downstream packet and transmits the downstream packet to a remote node.

    摘要翻译： 本发明的一个实施例提供了一种有助于在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）中转发分组的系统。 在操作期间，系统向远程节点分配逻辑链路标识符（LLID），其中LLID对应于中心节点和远程节点之间的逻辑链路。 该系统还将LLID与中央节点内的交换机的端口相关联，其中交换机具有多个端口; 其中端口可以是物理端口或虚拟端口; 并且其中交换机上的端口数被划分为网络侧端口和用户侧端口。 在从网络侧端口接收到下行分组时，系统搜索映射表以确定下行分组的一个或多个字段值是否对应于任何LLID或端口。 如果一个或多个字段值对应于LLID，则系统向下游分组分配LLID，并将下行分组发送到远程节点。

    METHOD AND SYSTEM FOR PROTECTION SWITCHING IN ETHERNET PASSIVE OPTICAL NETWORKS
    7.
    发明申请
    METHOD AND SYSTEM FOR PROTECTION SWITCHING IN ETHERNET PASSIVE OPTICAL NETWORKS 有权
    以太网被动光网络中的保护切换方法和系统

    公开(公告)号：US20100098407A1

    公开(公告)日：2010-04-22

    申请号：US12565680

    申请日：2009-09-23

    申请人： Sanjay Goswami ,  Lawrence D. Davis ,  Edward W. Boyd

    发明人： Sanjay Goswami ,  Lawrence D. Davis ,  Edward W. Boyd

    IPC分类号： H04J14/00 ,  H04B10/00

    CPC分类号： H04Q11/0067 ,  H04B10/032 ,  H04B10/272 ,  H04J2203/006 ,  H04Q2011/0081

    摘要： One embodiment provides a system that performs protection switching in an Ethernet passive optical network (EPON), which includes an optical line terminal (OLT) and at least one optical network unit (ONU). The system is configured with at least one redundant component for the OLT and/or ONUs, wherein the redundant component can be optical or electrical, and can be a port, line card or link. The system provides protection by detecting a failure, and switching automatically to the redundant components to reduce service disruption time. The protection switching comprises: preserving the existing configuration over the loss of at least one of a multiple-point control protocol (MPCP) message; an operations, administration and maintenance (OAM) message; and a signal on the physical layer. The system recovers from the failure without performing ONU discovery.

    摘要翻译： 一个实施例提供一种在包括光线路终端（OLT）和至少一个光网络单元（ONU）的以太网无源光网络（EPON）中执行保护切换的系统。 该系统配置有用于OLT和/或ONU的至少一个冗余组件，其中冗余组件可以是光学的或电的，并且可以是端口，线路卡或链路。 该系统通过检测故障提供保护，并自动切换到冗余组件以减少服务中断时间。 所述保护切换包括：通过丢失多点控制协议（MPCP）消息中的至少一个来保留现有配置; 操作，管理和维护（OAM）消息; 和物理层上的信号。 系统从故障中恢复，无需执行ONU发现。

    Method for data encryption in an ethernet passive optical network
    8.
    发明授权
    Method for data encryption in an ethernet passive optical network 有权
    以太网无源光网络数据加密方法

    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。

    RF signal transport over passive optical networks
    9.
    发明授权
    RF signal transport over passive optical networks 有权
    无源光网络上的RF信号传输

    公开(公告)号：US08798470B2

    公开(公告)日：2014-08-05

    申请号：US13567497

    申请日：2012-08-06

    申请人： Edward W. Boyd ,  Weidong Rick Li

    发明人： Edward W. Boyd ,  Weidong Rick Li

    IPC分类号： H04B10/00 ,  H04J14/00

    CPC分类号： H04B10/25751 ,  H04L7/0008

    摘要： One embodiment provides an EPON for transporting RF signals. The system includes a reference clock, an ONU, and an OLT. The ONU includes a mechanism for receiving a frequency and phase-reference signal from the OLT, a mechanism for receiving an RF signal, an ADC for converting the RF signal into a digital signal using a sampling signal associated with the frequency and phase-reference signal, a mechanism for assembling at least a portion of the digital signal into a packet, a mechanism configured to timestamp the packet, and an optical transceiver. The OLT includes a mechanism for receiving the packet, a buffer, a delay mechanism configured to delay reading the received packet from the buffer for a predetermined amount of time, and a DAC for converting the digital signal included in the packet back to RF domain using a clock signal associated with the frequency and phase-reference signal.

    摘要翻译： 一个实施例提供用于传送RF信号的EPON。 该系统包括参考时钟，ONU和OLT。 ONU包括用于从OLT接收频率和相位参考信号的机构，用于接收RF信号的机构，用于使用与频率和相位参考信号相关联的采样信号将RF信号转换为数字信号的ADC ，用于将数字信号的至少一部分组装成分组的机构，被配置为对分组进行时间戳的机制和光收发器。 OLT包括用于接收分组的机制，缓冲器，延迟机制，被配置为延迟从缓冲器读取预定时间量的数据包;以及DAC，用于将包中包含的数字信号转换回RF域，使用 与频率和相位参考信号相关联的时钟信号。

    Epon with power-saving features
    10.
    发明授权
    Epon with power-saving features 有权
    Epon具有省电功能

    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。