公开(公告)号：US09002197B2

公开(公告)日：2015-04-07

申请号：US13677263

申请日：2012-11-14

申请人： Stefan Dahlfort ,  Peter Öhlén ,  Kim Laraqui ,  David Hood

发明人： Stefan Dahlfort ,  Peter Öhlén ,  Kim Laraqui ,  David Hood

IPC分类号： H04B10/079 ,  H04L12/26 ,  H04L12/24 ,  H04B10/077

CPC分类号： H04L12/2639 ,  H04B10/0771 ,  H04L41/0677 ,  H04L41/0686 ,  H04L43/0811 ,  H04L43/0864 ,  H04L43/106

摘要： Methods and apparatus for a network element or server end station to determine an estimated physical location of a fault in a communications link utilized by two network elements. In an embodiment, the first and second network elements generate link failure indications including time values representing when the respective network element detected the fault. In other embodiments, the link failure indications include time values transmitted over the communications link between the first and second network elements. A time distance between these time values is calculated, which is used to calculate the estimated physical location of the fault. In some embodiments, the link failure indications include sequence numbers transmitted or about to be transmitted over the communications link between the network elements. Sequence distances are calculated between the sequence numbers, and are used to calculate the estimated physical location of the fault.

摘要翻译： 网络元件或服务器终端站的方法和装置，用于确定由两个网络元件使用的通信链路中的故障的估计物理位置。 在一个实施例中，第一和第二网络元件产生链路故障指示，包括表示相应网络元件何时检测到故障的时间值。 在其他实施例中，链路故障指示包括通过第一和第二网络元件之间的通信链路发送的时间值。 计算这些时间值之间的时间距离，用于计算故障的估计物理位置。 在一些实施例中，链路故障指示包括通过网络元件之间的通信链路发送或将要发送的序列号。 在序列号之间计算序列距离，并用于计算故障的估计物理位置。

公开(公告)号：US20140193161A1

公开(公告)日：2014-07-10

申请号：US14117473

申请日：2011-05-17

申请人： Einar In De Betou ,  Stefan Dahlfort ,  David Hood ,  Peter Öhlén

发明人： Einar In De Betou ,  Stefan Dahlfort ,  David Hood ,  Peter Öhlén

IPC分类号： H04L7/02 ,  H04B10/27

CPC分类号： H04L7/02 ,  H04B10/27 ,  H04J14/0256 ,  H04L5/1446 ,  H04Q11/00 ,  H04Q11/0062 ,  H04Q11/0067 ,  H04Q2011/0064 ,  H04Q2011/0081 ,  H04Q2011/0086 ,  H04Q2213/1301 ,  H04Q2213/13332 ,  Y02D50/10

摘要： A first end terminal and a second end terminal, as well as a respective method therein, are provided for enabling communication between the first end terminal and the second end terminal in a fibre optic access network. When the first and the second end terminal wish to communicate with each other, they first initiate a synchronisation procedure with the other end terminal for synchronising the two terminals with each other and enabling them to start a negotiation procedure. Then they perform the negotiation procedure, which pertains to a transmission rate for communication on the fibre link between the two end terminals, and they execute communication to the other end terminal employing the negotiated transmission rate.

摘要翻译： 提供第一端子端子和第二端子端子以及其中的相应方法，用于实现光纤接入网络中的第一端子端子和第二端子端子之间的通信。 当第一和第二终端希望彼此通信时，它们首先与另一端终端发起同步过程，以使两个终端彼此同步，并使它们能够开始协商过程。 然后它们执行与两端终端之间的光纤链路上的通信的传输速率相关的协商过程，并且它们使用协商的传输速率执行到另一端终端的通信。

公开(公告)号：US08744263B2

公开(公告)日：2014-06-03

申请号：US13132536

申请日：2009-12-01

申请人： Peter Öhlén ,  Stefan Dahlfort

发明人： Peter Öhlén ,  Stefan Dahlfort

IPC分类号： H04J14/00

CPC分类号： H04B10/272 ,  H04J14/0221 ,  H04J14/0282

摘要： A wavelength-multiplexed passive optical network (WDM-PON) and a method are described herein for setting-up (e.g., wavelength tuning, power tuning) an ONT laser by establishing a communications channel on an optical layer between an optical line terminal (OLT) and an optical network termination (ONT). The communications channel is established by utilizing the OLT's laser shutdown function and the ONT's signal detection function.

摘要翻译： 本文描述了波分复用无源光网络（WDM-PON）和方法，用于通过在光线路终端（OLT）之间的光学层上建立通信信道来建立（例如波长调谐，功率调谐）ONT激光器 ）和光网络终端（ONT）。 通过利用OLT的激光关机功能和ONT的信号检测功能建立通信信道。

公开(公告)号：US20130089322A1

公开(公告)日：2013-04-11

申请号：US13805019

申请日：2010-06-18

申请人： Peter Öhlén

发明人： Peter Öhlén

IPC分类号： H04B10/27

CPC分类号： H04B10/07957 ,  H04B10/572

摘要： A method at a transmitter of a tunable laser of controlling a mode change of the laser during a transmission of data to a receiver of a terminating node is based on the determination of a time instance for initiation of the mode change on the basis of the state of the tunable laser. In addition, buffer occupancy and/or the state of the data transmission may be considered when determining such a time instance for instance. In addition, data of the data transmission is buffered during the mode change, such that data loss is avoided during the change of mode. A transmitter is also provided which can execute the suggested mode changing method.

摘要翻译： 在将数据发送到终止节点的接收机期间控制激光器的模式变化的可调谐激光器的发射机的方法是基于基于状态来启动模式改变的时间实例的确定 的可调激光器。 此外，当确定这样的时间实例时，可以考虑缓冲器占用和/或数据传输的状态。 此外，数据传输的数据在模式改变期间被缓冲，使得在模式改变期间避免数据丢失。 还提供了可以执行建议的模式改变方法的发射机。

公开(公告)号：US07320095B2

公开(公告)日：2008-01-15

申请号：US10488448

申请日：2002-09-03

申请人： Peter Öhlén

发明人： Peter Öhlén

IPC分类号： G06F11/00

CPC分类号： H04L25/063 ,  H04L1/20

摘要： A threshold value is set in a decision circuit receiving a transmitted stream of binary symbols from a network link. The decision circuit uses the threshold value for detecting whether a 1 or a 0 is received to produce an output stream having a low bit error rate. Bit errors in the output stream of the detector are detected. The number of errors is counted when a transmitted 0 is detected as a 1 in the output stream. The number of errors is also counted when a transmitted 1 is detected as a 0 in the output stream. The counted numbers of errors are compared to each other. The threshold value is modified, if necessary, based on the result of the comparing, to e.g. make the probabilities of the two kinds of errors equal to each other. Extra predetermined bits can be inserted and used in determining bit errors.

摘要翻译： 在从网络链路接收二进制符号的发送流的判定电路中设定阈值。 判定电路使用阈值来检测是否接收到1或0以产生具有低位错误率的输出流。 检测器的输出流中的位错误被检测到。 当在输出流中检测到发送的0作为1时，计数错误的数量。 当输出流中发送1被检测为0时，也会计数错误数。 将计数的错误数相互比较。 如果需要，根据比较的结果修改阈值，例如， 使两种错误的概率相互相等。 可以插入额外的预定位并用于确定位错误。

公开(公告)号：US09356694B2

公开(公告)日：2016-05-31

申请号：US13805019

申请日：2010-06-18

申请人： Peter Öhlén

发明人： Peter Öhlén

IPC分类号： H04B10/079 ,  H04B10/572

CPC分类号： H04B10/07957 ,  H04B10/572

摘要： A method at a transmitter of a tunable laser of controlling a mode change of the laser during a transmission of data to a receiver of a terminating node is based on the determination of a time instance for initiation of the mode change on the basis of the state of the tunable laser. In addition, buffer occupancy and/or the state of the data transmission may be considered when determining such a time instance. In addition, data of the data transmission is buffered during the mode change, such that data loss is avoided during the change of mode. A transmitter is also provided which can execute the suggested mode changing method.

摘要翻译： 在将数据发送到终止节点的接收机期间控制激光器的模式变化的可调谐激光器的发射机的方法是基于基于状态来启动模式改变的时间实例的确定 的可调激光器。 此外，当确定这样的时间实例时，可以考虑缓冲器占用和/或数据传输的状态。 此外，数据传输的数据在模式改变期间被缓冲，使得在模式改变期间避免数据丢失。 还提供了可以执行建议的模式改变方法的发射机。

公开(公告)号：US09112635B2

公开(公告)日：2015-08-18

申请号：US13495637

申请日：2012-06-13

申请人： Peter Öhlén

发明人： Peter Öhlén

IPC分类号： H04J14/02

CPC分类号： H04J14/021 ,  H04J14/0213

摘要： An access subnetwork node herein comprises one or more add-drop modules, each module including one or more passive optical filters. The one or more add-drop modules are configured to selectively drop a fixed band of wavelength channels from an access subnetwork, via a passive directional coupler, to each of multiple client nodes that actively select to receive client-specific channels within the fixed band. The one or more add-drop modules are also configured to selectively add the fixed band of wavelength channels to the access subnetwork, as received via a passive directional coupler from the multiple client nodes that actively select to transmit client-specific channels within the fixed band. With an access subnetwork node and a client node configured in this way, embodiments herein reduce the complexity and accompanying cost of nodes in an optical network, while also maintaining flexibility for assigning wavelength channels in the network.

摘要翻译： 这里的接入子网节点包括一个或多个插入模块，每个模块包括一个或多个无源光学滤波器。 一个或多个插入模块被配置为选择性地将来自接入子网络的固定频带的波长信道经由无源定向耦合器分离到主动选择接收固定频带内的客户端特定信道的多个客户端节点中的每一个。 一个或多个分插模块还被配置为选择性地将固定频带的波长信道添加到接入子网络，如通过主动选择在固定频带内传送客户端特定信道的多个客户端节点的无源定向耦合器 。 利用以这种方式配置的接入子网节点和客户端节点，这里的实施例降低了光网络中节点的复杂性和伴随成本，同时还保持了用于分配网络中的波长信道的灵活性。

公开(公告)号：US08649681B2

公开(公告)日：2014-02-11

申请号：US13129741

申请日：2009-11-30

申请人： Peter Öhlén

发明人： Peter Öhlén

IPC分类号： H04J14/00 ,  H04B10/00

CPC分类号： H04J14/0282 ,  H04B10/07955 ,  H04J14/0235

摘要： An optical network unit for a passive optical network (10), configured to: initiate an upstream wavelength (wus) for an upstream signal (US) from the optical network unit to an optical line terminal (10); iteratively, until an iteration criterion is met, i) transmit the upstream signal (US) to the optical line terminal (10), ii) receive from the optical line terminal (10) power level data (p) for the upstream signal (US) as measured by the optical line terminal (10), and iii) set the upstream wavelength (wus) for the upstream signal (US) to a new wavelength-value; and adjust the upstream wavelength (wus) to a wavelength-value previously set for the upstream signal (US) and associated with power level data corresponding to a certain power level. A passive optical network system, the optical line terminal and related methods are also disclosed.

摘要翻译： 一种用于无源光网络（10）的光网络单元，用于：从所述光网络单元向光线路终端（10）发起用于上行信号（US）的上行波长（wus）; 迭代地，直到满足迭代标准，i）将上行信号（US）发送到光线路终端（10），ii）从光线路终端（10）接收上行信号（US）的功率电平数据（p） ），并且iii）将上行信号（US）的上行波长（wus）设置为新的波长值; 并且将上游波长（wus）调整到先前为上行信号（US）设置的波长值，并且与对应于一定功率电平的功率电平数据相关联。 还公开了一种无源光网络系统，光线路终端及相关方法。

公开(公告)号：US08995562B2

公开(公告)日：2015-03-31

申请号：US13578672

申请日：2011-02-14

申请人： Einar In De Betou ,  Peter Öhlén

发明人： Einar In De Betou ,  Peter Öhlén

IPC分类号： H04L27/00 ,  H04L25/49 ,  H04L25/03

CPC分类号： H04L25/4908 ,  H04L25/03866

摘要： A method and apparatus for controlling DC balance in a digital communication system in which data frames are transmitted, wherein the data frames include a header portion that is transmitted unscrambled and a payload portion that is scrambled before transmission. The header portion includes a frame counter field. A value for the frame counter field is randomly generated and an effect on the DC balance is estimated. It is then determined whether the estimated effect on the DC balance meets defined requirements for DC balance. When the estimated effect does not meet the defined requirements for DC balance, a new random value for the frame counter field is generated and checked. When the estimated effect meets the requirements, the randomly generated value is utilized in the frame counter field in transmitted data frames.

摘要翻译： 一种在发送数据帧的数字通信系统中控制DC平衡的方法和装置，其中数据帧包括未加扰的头部部分和在发送之前加扰的有效载荷部分。 标题部分包括帧计数器字段。 随机生成帧计数器字段的值，并估计对直流平衡的影响。 然后确定对直流平衡的估计影响是否满足直流平衡的定义要求。 当估计效果不符合直流平衡的定义要求时，会生成并检查帧计数器字段的新随机值。 当估计效果满足要求时，在发送的数据帧中的帧计数器字段中利用随机生成的值。

公开(公告)号：US20140199062A1

公开(公告)日：2014-07-17

申请号：US14117406

申请日：2011-05-17

申请人： Einar In De Betou ,  Stefan Dahlfort ,  David Hood ,  Peter Öhlén

发明人： Einar In De Betou ,  Stefan Dahlfort ,  David Hood ,  Peter Öhlén

IPC分类号： H04B10/032

CPC分类号： H04B10/032 ,  H04B10/25753 ,  H04J14/0287 ,  H04W24/04 ,  H04W88/085

摘要： An Optical Network Unit, ONU, and an Optical Line Terminal, OLT, as well as a respective method therein, are provided for enabling the ONU to communicate with the OLT. The ONU and at least one OLT are comprised in a passive fibre optic access network. The passive fibre optic access network comprises two fibre paths through the network, a main fibre path and a back-up fibre path, connecting the ONU with the OLT. When a fault is detected in the main fibre path is detected, transmission rate negotiation is performed between the ONU and the OLT over the back-up path. When a transmission rate is agreed upon between the ONU and the OLT during said transmission rate negotiation with regard to communication over the back-up path, the communication between the ONU and the OLT is executed using the agreed transmission rate over the back-up path.

摘要翻译： 光网络单元，ONU和光线路终端，OLT以及其中的相应方法被提供用于使得ONU能够与OLT通信。 ONU和至少一个OLT包括在无源光纤接入网络中。 无源光纤接入网络包括通过网络的两条光纤路径，主光纤路径和备用光纤路径，将ONU与OLT连接起来。 当在主光纤路径中检测到故障时，通过备用路径在ONU与OLT之间进行传输速率协商。 当在通过备用路径的通信的所述传输速率协商期间在ONU与OLT之间达成传输速率时，ONU和OLT之间的通信是通过备用路径的约定的传输速率来执行的 。