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    • 11. 发明申请
    • Circuit for detecting optical failures in a passive optical network
    • 用于检测无源光网络中的光学故障的电路
    • US20080056731A1
    • 2008-03-06
    • US11514937
    • 2006-09-05
    • Raviv WeberAsaf Koren
    • Raviv WeberAsaf Koren
    • H04B10/04
    • H04B10/0793H04B10/07955H04Q11/0067H04Q2011/0079
    • A circuit for detecting optical failures in a passive optical network (PON) wherein digital burst data transmitted by an optical transmitter is monitored by a photodiode, includes a power determination unit coupled to the photodiode for providing measurements of an output optical power of a high logic level and a low logic level of the digital burst data during ON times of the optical transmitter and for providing a measurement of an output optical power during OFF times of the optical transmitter. A logic unit coupled to the power determination unit is responsive to the measurements for generating control and calibration signals. Such a circuit may be used for detecting rogue optical network unit (ONU) failure or eye safety hazards in a passive optical network (PON) wherein digital burst data transmitted by an optical transmitter is monitored by a photodiode.
    • 一种用于检测无源光网络(PON)中的光学故障的电路,其中由光发射机传输的数字突发数据由光电二极管监测,包括耦合到光电二极管的功率确定单元,用于提供高逻辑的输出光功率的测量值 在光发射机的接通时间期间数字脉冲数据的电平和低逻辑电平,并且用于在光发射机的OFF时间期间提供输出光功率的测量。 耦合到功率确定单元的逻辑单元响应于用于产生控制和校准信号的测量。 这样的电路可以用于检测无源光网络(PON)中的流氓光网络单元(ONU)故障或眼睛安全隐患,其中由光发射机发送的数字突发数据由光电二极管监测。
    • 13. 发明申请
    • APPARATUS AND METHOD FOR PERFORMING LINE ANALYSIS OF CONTINUOUS DATA SIGNALS
    • 连续数据信号线分析的装置和方法
    • US20120093499A1
    • 2012-04-19
    • US13306326
    • 2011-11-29
    • Amiad DvirAlex GoldsteinDavid Avishai
    • Amiad DvirAlex GoldsteinDavid Avishai
    • H04B17/00H04B10/00
    • H04B10/0795
    • A method for performing an optical line analysis of continuous data signals transmitted in a passive optical network (PON). The method comprises determining, from an optical signal of the optical line, at least one of a phase early/late indicator based on a phase position of an input continuous data signal relative to sampling clock signals, a difference phase indicator based on an input phase control code, and a low frequency jitter indicator based on an input phase control code; computing a plurality of statistical measures regarding frequency and amplitude components of a jitter of the input continuous data signal, wherein the statistical measures are computed based on one of the phase early/late information indicator, the difference phase indicator, and the low frequency jitter indicator; and analyzing the plurality of statistical measures to detect optical failures in the PON and determining a root cause of each of the detected failures.
    • 一种用于对在无源光网络(PON)中发送的连续数据信号执行光线分析的方法。 该方法包括:从光线路的光信号,基于相对于采样时钟信号的输入连续数据信号的相位位置来确定相位早/晚指示符中的至少一个,基于输入相位的差相位指示符 控制代码和基于输入相位控制代码的低频抖动指示器; 计算关于输入连续数据信号的抖动的频率和幅度分量的多个统计量度,其中基于相位早/晚信息指示符,差相位指示符和低频抖动指示器之一来计算统计测量值 ; 并且分析多个统计测量以检测PON中的光学故障并确定每个检测到的故障的根本原因。
    • 16. 发明申请
    • OPTICAL BURST RECEIVER WITH A CONFIGURABLE AC AND DC COUPLING INTERFACE
    • 具有可配置的交流和直流耦合接口的光学接收器
    • US20110176806A1
    • 2011-07-21
    • US12967461
    • 2010-12-14
    • Amiad Dvir
    • Amiad Dvir
    • H04B10/20
    • H04B10/60H04B10/69H04J14/0282
    • A method for enabling AC coupling or DC coupling when receiving burst data signals comprises generating a hold-over pattern, wherein the hold-over pattern is a AC balanced pattern when an AC coupling is required and a low-logic value signal when a DC coupling is required; inputting the generated hold-over pattern to an AC coupling circuit, when no burst data signal is received; inputting only a received burst data signal to the AC coupling circuit, during the reception of such signal; and upon receiving of the entire burst data signal, generating a reset signal causing to input the generated hold-over pattern to an AC coupling circuit.
    • 一种在接收脉冲串数据信号时实现AC耦合或DC耦合的方法包括产生保持模式,其中当需要AC耦合时,保持模式是AC平衡模式,当DC耦合时为低逻辑值信号 是必须的; 当不接收到突发数据信号时,将产生的保持模式输入到AC耦合电路; 在接收到这种信号期间,仅将接收到的突发数据信号输入到AC耦合电路; 并且在接收到整个突发数据信号时,产生复位信号,从而将产生的保持模式输入到AC耦合电路。
    • 18. 发明申请
    • TECHNIQUES FOR PROTECTING PASSIVE OPTICAL NETWORKS
    • 保护被动光网络的技术
    • US20100166419A1
    • 2010-07-01
    • US12648885
    • 2009-12-29
    • Eli ElmoalemAmiad Dvir
    • Eli ElmoalemAmiad Dvir
    • H04B10/08H04B10/24
    • H04Q11/0067H04J3/0682H04Q2011/0015H04Q2011/0035H04Q2011/0081
    • A method for performing a protection in passive optical networks. The method comprises forming a protection maintenance link between an active optical line terminal (OLT) and a standby OLT; forming a synchronization link between the active OLT and the standby OLT; computing a base differential distance value; continuously measuring round trip time (RTT) values by the active OLT using the protection maintenance link; periodically sending at least RTT values calculated by the active OLT to the standby OLT over the synchronization link; and computing, by the standby OLT, a new RTT value based on at least a RTT value measured by the active OLT and a standby differential distance value, when a switch-over action is triggered, thereby allowing the standby OLT to serve optical network units (ONUs) in the PON without performing a ranging process.
    • 一种在无源光网络中执行保护的方法。 该方法包括在有源光线路终端(OLT)和备用OLT之间形成保护维护链路; 在主动OLT和备用OLT之间形成同步链路; 计算基差分距离值; 使用保护维护链路连续测量主动OLT的往返时间(RTT)值; 周期性地通过同步链路将由主动OLT计算出的至少RTT值发送到备用OLT; 以及当所述备用OLT在触发切换动作时,至少基于由所述有源OLT测量的RTT值和备用差分距离值来计算新的RTT值,从而允许所述备用OLT服务于光网络单元 (ONU),而不执行测距过程。
    • 20. 发明申请
    • METHOD FOR MULTICASTING OF PACKETS IN PON RESIDENTIAL GATEWAYS
    • 在PON住宅网关中分组的方法
    • US20100098076A1
    • 2010-04-22
    • US12277133
    • 2008-11-24
    • Gil LevyAsaf KorenMichael BalterIfat Naaman
    • Gil LevyAsaf KorenMichael BalterIfat Naaman
    • H04L12/56
    • H04L12/2885H04L12/1836H04L12/2861H04Q11/0067H04Q2011/0073
    • A method for multicasting packets in a passive optical network (PON) residential gateway. The method comprises storing a payload portion of an input packet in a memory; duplicating a header of the input packet to create duplicate headers as the number of destination end-point devices; modifying each of the duplicated header to uniquely designate an output interface of an Ethernet medium access (MAC) adapter coupled to at least one of the destination endpoint devices; passing to the Ethernet MAC adapter its respective modified header together with a pointer to a location of the payload portion in the memory; generating a multicast packet by retrieving the payload portion from the memory and attaching the modified header to the payload portion; and transmitting the multicast packet to the destination endpoint device coupled to the Ethernet MAC adapter.
    • 一种在无源光网络(PON)住宅网关中组播数据包的方法。 该方法包括将输入分组的有效载荷部分存储在存储器中; 复制输入分组的报头以创建重复报头作为目的终点设备的数量; 修改每个复制的报头以唯一地指定耦合到目的地端点设备中的至少一个的以太网介质访问(MAC)适配器的输出接口; 将以太网MAC适配器的相应修改的报头与指向存储器中的有效载荷部分的位置的指针一起传递到以太网MAC适配器; 通过从所述存储器检索所述有效负载部分并将所述修改的报头附加到所述有效载荷部分来生成多播分组; 以及将所述多播分组发送到耦合到以太网MAC适配器的目的地端点设备。