公开(公告)号：US20150098492A1

公开(公告)日：2015-04-09

申请号：US14391161

申请日：2013-04-09

申请人： FTS Computertechnik GmbH

发明人： Stefan Poledna

IPC分类号： H04B1/7087 ,  G06F1/14 ,  H04L1/22

CPC分类号： H04B1/7087 ,  G06F1/14 ,  H04J3/0641 ,  H04J3/0661 ,  H04J3/0688 ,  H04L1/22 ,  H04L41/0654 ,  H04L43/106

摘要： The invention relates to a method for generating fail-silent synchronisation messages in a distributed real-time system, wherein the method uses the following functional units: a satellite receiver (110) for receiving a time signal (S-signal) from a navigation satellite system, a precision reference clock (130), which generates an actual time signal (R-signal), a central computer (140), a monitor (120) and a data block (210) for storing configuration parameters, wherein the satellite receiver (110) periodically generates an S-signal, and wherein the reference clock (130) periodically produces an R-signal, wherein the nominal frequency and phase of the R-signal is identical to the frequency and phase of the S-signal, and wherein the difference between the nominal and actual R-signal is used in order to minimise this difference in the future, and wherein, in the normal case of the satellite receiver (110), the periodic synchronisation message (220), which is to be generated in accordance with the configuration parameters (210) by the central computer (140), is generated on the basis of the S-signal and the difference between the nominal and actual R-signal is used in order to adapt (preferably in the short term) the state and (preferably in the long term) the timing rate of the reference clock (130) to the S-signal, and wherein, in the case of an anomaly of the satellite receiver (110), the timing rate adaptation of the reference clock (120) is suspended, and wherein, in the case of a fault of the satellite receiver (110), the periodic synchronisation message (220), which is to be generated in accordance with the configuration parameters (210) by the central computer (140), is generated on the basis of the R-signal, and wherein the monitor (120) checks whether the transmission time contained in the synchronisation message matches the actual transmission time and the distance between two successive synchronisation messages (220) lies within an a priori fixed tolerance interval, and, if this is not the case, modifies the synchronisation message (220) in such a way that each receiver identifies the synchronisation message (220) as erroneous.

公开(公告)号：US08983015B2

公开(公告)日：2015-03-17

申请号：US14060503

申请日：2013-10-22

申请人： Aviat U.S., Inc.

发明人： Philip Secker ,  Peter Croy

IPC分类号： H04L7/00 ,  H04J3/06 ,  H03L7/18

CPC分类号： H04W56/0015 ,  H03L7/08 ,  H03L7/18 ,  H03L2207/50 ,  H04J3/0602 ,  H04J3/0617 ,  H04J3/0638 ,  H04J3/0641 ,  H04J3/0647 ,  H04J3/065 ,  H04J3/0658 ,  H04J3/0679 ,  H04J3/0688

摘要： In some embodiments, a system comprises a clock, a root node, a radio channel network, and first and second child nodes. The clock may be configured to generate a clock signal. The root node may be configured to generate a first frame including a first payload and a first overhead and generate a second frame including a second payload and a second overhead. The first and second overheads may comprise a synchronization value based on the clock signal. The radio channel network may be in communication with the root node for transmitting the first and second frames. Each first and second child nodes may be configured to perform clock recovery including frequency synchronization using the synchronization value and a respective phase-lock loop.

摘要翻译： 在一些实施例中，系统包括时钟，根节点，无线电信道网络以及第一和第二子节点。 时钟可以被配置为产生时钟信号。 根节点可以被配置为生成包括第一有效载荷和第一开销的第一帧，并且生成包括第二有效载荷和第二开销的第二帧。 第一和第二开销可以包括基于时钟信号的同步值。 无线电信道网络可以与根节点进行通信，用于发送第一和第二帧。 每个第一和第二子节点可以被配置为执行包括使用同步值的频率同步的时钟恢复和相应的锁相环。

公开(公告)号：US20150066469A1

公开(公告)日：2015-03-05

申请号：US14533982

申请日：2014-11-05

申请人： Rockwell Automation Technologies, Inc.

发明人： Francisco P. Maturana ,  Kenwood H. Hall

IPC分类号： G06F17/50

CPC分类号： G06F17/5022 ,  G06F1/10 ,  G06F1/12 ,  G06F2217/62 ,  H04J3/0638 ,  H04J3/0641 ,  H04J3/0688 ,  H04N21/242

摘要： Systems and methods that efficiently simulate controlled systems are presented. A simulation management component (SMC) controls simulation of a controlled system by controlling a desired number of nodes, each comprising a controller (e.g., soft controller) and a simulated component or process, which are part of the controlled system. The simulation can be performed in a step-wise manner, wherein the simulation can comprise a desired number of steps of respectively desired lengths of time. For each step, the SMC dynamically selects a desired clock (e.g., currently identified slowest clock) as a master clock for the next step. The SMC predicts a length of time of the next step to facilitate setting a desired length of time for the next step based in part on the predicted length of time. As part of each step, components can synchronously exchange data via intra-node or inter-node connections to facilitate simulation.

摘要翻译： 介绍了有效模拟受控系统的系统和方法。 模拟管理组件（SMC）通过控制所需数量的节点来控制受控系统的模拟，每个节点包括作为受控系统的一部分的控制器（例如，软控制器）和模拟组件或过程。 模拟可以以逐步的方式执行，其中模拟可以包括分别期望的时间长度的期望数量的步骤。 对于每个步骤，SMC动态地选择期望的时钟（例如，当前确定的最慢时钟）作为下一步骤的主时钟。 SMC预测下一步的时间长度，以便于部分地基于预计的时间长度，以便于为下一步骤设置期望的时间长度。 作为每个步骤的一部分，组件可以通过节点内或节点间连接同步交换数据，以便于模拟。

公开(公告)号：US20150022323A1

公开(公告)日：2015-01-22

申请号：US14225359

申请日：2014-03-25

申请人： Neology, Inc.

发明人： James Robert Kruest ,  Gary Bann

IPC分类号： G06K7/10

CPC分类号： G06K7/10475 ,  G06K7/0008 ,  G06K7/10029 ,  G06K7/10039 ,  G06K19/0723 ,  G06K19/07796 ,  G06K19/07798 ,  G06Q10/08 ,  H04J3/0641 ,  H05K1/02 ,  H05K1/0266 ,  H05K1/0268 ,  H05K1/142 ,  H05K3/30 ,  H05K2201/0909 ,  H05K2201/09127

摘要： RFID tags are used for many purpose including tracking. RFID interrogators are used to retrieve information from tags. In many applications, a plurality of RFID interrogators are required. Synchronization between interrogators in the same theatre of operation is critical to ensure that their broadcasts do not interfere with each other. In fixed RFID interrogator applications, RFID interrogators can be wired together allowing a channel to synchronize the transmissions of the RFID interrogators. Methods described herein can ensure that synchronization is maintained in the event of the failure of a synchronizing master. Furthermore, additional methods for synchronizing RFID interrogators in wireless applications are described allowing synchronization in the absence of wired connections between interrogators.

摘要翻译： RFID标签用于许多目的，包括跟踪。 RFID询问器用于从标签中检索信息。 在许多应用中，需要多个RFID询问器。 同一操作剧场中的询问器之间的同步至关重要，以确保他们的广播不会相互干扰。 在固定的RFID询问器应用中，RFID询问器可以连接在一起，允许信道同步RFID询问器的传输。 本文描述的方法可以确保在同步主机故障的情况下维持同步。 此外，描述了用于在无线应用中同步RFID询问器的附加方法，允许在询问器之间没有有线连接的情况下进行同步。

公开(公告)号：US08934891B2

公开(公告)日：2015-01-13

申请号：US13492134

申请日：2012-06-08

申请人： Rafael Carmon

发明人： Rafael Carmon

IPC分类号： H04W56/00

CPC分类号： H04L27/0014 ,  H04J3/0641 ,  H04J3/0658 ,  H04W56/0015 ,  H04W56/0035

摘要： A system, method, and apparatus to facilitate the synchronization of oscillators between members of a Heterogeneous Network (HetNet) to form a self-synchronizing network (SSN). The network members are configured to broadcast information indicative of the reliability of their oscillator. Network members attempt to look for reliable sources such as those originating from a macrocell base station or GPS. If such a source is found, the member cell updates it clock accuracy confidence level number (CACL) to indicate this. Network members also share information regarding the frequency offsets between one another. Every cell member then applies a weighted average function to determine how to update its own oscillator and CACL value accordingly. Cell members can also update their functionality, such as RF power level, in response to varying degrees of CACL values. This operation results in a convergence of all cell members to the most accurate oscillator offset value.

摘要翻译： 一种促进异构网络（HetNet）的成员之间的振荡器同步以形成自同步网络（SSN）的系统，方法和装置。 网络成员被配置为广播指示其振荡器的可靠性的信息。 网络成员尝试寻找可靠的来源，例如来自宏蜂窝基站或GPS的源。 如果找到这样的源，则成员单元更新其时钟精度置信水平号（CACL）以指示这一点。 网络成员还共享关于彼此之间的频率偏移的信息。 然后，每个单元成员应用加权平均函数来确定如何相应地更新其自己的振荡器和CACL值。 响应于不同程度的CACL值，单元成员还可以更新其功能，例如RF功率电平。 该操作导致所有单元构件收敛到最准确的振荡器偏移值。

公开(公告)号：US20140376533A1

公开(公告)日：2014-12-25

申请号：US14309656

申请日：2014-06-19

申请人： KABUSHIKI KAISHA TOSHIBA

发明人： Yuji TOHZAKA ,  Hiroki KUDO ,  Takafumi SAKAMOTO

IPC分类号： H04J3/06

CPC分类号： H04J3/0664 ,  H04J3/0641

摘要： According to an embodiment, a wireless communication unit includes a media access control (MAC) unit. The MAC unit includes a clock unit, an acquisition unit and a calculation unit. The clock unit includes a register which stores periodically counted-up first time information. The acquisition unit acquires a statistic for reception quality information on the received packet. The calculation unit normalizes the second time information, weights the normalized second time information using a time weight based on the statistic, and calculates a time correction value for correcting the first time information, using the weighted and normalized second time information. The time weight increases with increasing link stability indicated by the statistic.

摘要翻译： 根据实施例，无线通信单元包括媒体访问控制（MAC）单元。 MAC单元包括时钟单元，采集单元和计算单元。 时钟单元包括一个寄存器，该寄存器周期性地存储第一次累计的信息。 获取单元获取关于接收到的分组的接收质量信息的统计量。 计算单元对第二时间信息进行归一化，使用基于统计量的时间权重对归一化的第二时间信息进行加权，并且使用加权且归一化的第二时间信息来计算用于校正第一时间信息的时间校正值。 时间权重随着统计数据指示的链路稳定性的增加而增加。

公开(公告)号：US20140169157A1

公开(公告)日：2014-06-19

申请号：US13714952

申请日：2012-12-14

申请人： GENERAL ELECTRIC COMPANY

发明人： Yan Pan ,  William James Premerlani

IPC分类号： H04L12/24

CPC分类号： H04L41/0668 ,  H02H1/0061 ,  H02H3/305 ,  H02J13/00 ,  H02J13/0079 ,  H04J3/0638 ,  H04J3/0641 ,  H04L12/40 ,  H04L12/4035 ,  H04L41/0686 ,  H04L41/12

摘要： A differential protection system is provided. The differential protection system includes a local terminal configured to be communicatively coupled directly or indirectly with at least two remote terminals via at least three communication links to form a ring topology or a mesh topology. The differential protection system further includes a controller comprising a communication link decision unit and a clock unit associated with the local terminal. The communication link decision unit is configured to determine some of the at least three communication links as virtually disconnected such that the ring topology or the mesh topology is configured to be converted to a daisy chain topology. The clock unit is configured to time synchronize the local terminal with at least one of the at least two remote terminals when the local terminal and the at least two remote terminals are configured in the daisy chain topology.

摘要翻译： 提供差动保护系统。 差分保护系统包括被配置为经由至少三个通信链路直接或间接地与至少两个远程终端通信地耦合以形成环形拓扑或网格拓扑的本地终端。 差分保护系统还包括控制器，其包括通信链路决定单元和与本地终端相关联的时钟单元。 通信链路决定单元被配置为将所述至少三个通信链路中的一些确定为虚拟断开，使得环形拓扑或网状拓扑被配置为被转换为菊花链拓扑。 时钟单元被配置为当本地终端和至少两个远程终端被配置在菊花链拓扑中时，使本地终端与至少两个远程终端中的至少一个进行时间同步。

公开(公告)号：US20140153412A1

公开(公告)日：2014-06-05

申请号：US13690164

申请日：2012-11-30

申请人： ELECTRO-MOTIVE DIESEL INC. ,  SECURE COMMUNICATION SYSTEMS INC.

发明人： James Robert LUECKE ,  Wayne Rudolph

IPC分类号： H04L12/24

CPC分类号： H04B3/487 ,  H04J3/0641 ,  H04L1/00 ,  H04L1/06 ,  H04L1/20 ,  H04L1/22 ,  H04L7/0008 ,  H04L12/28 ,  H04L2001/0096 ,  H04L2012/40293

摘要： A method for controlling data communication within a locomotive consist is disclosed. The method may include receiving, at a first access point, a first set of data packets that represent a communication sent from a second access point via a first set of wires. The method may also include receiving, at the first access point, a second set of data packets that represent the same communication sent from the second access point via a second set of wires. Further, the method may include processing the first set of data packets and the second set of data packets to create a resultant set of data packets and generating, at the first access point, a communication related to operating the locomotive based on the resultant data packets.

摘要翻译： 公开了一种用于控制机车组件内的数据通信的方法。 该方法可以包括在第一接入点处接收表示从第二接入点经由第一组线路发送的通信的第一组数据分组。 该方法还可以包括在第一接入点处接收代表从第二接入点经由第二组线路发送的相同通信的第二组数据分组。 此外，该方法可以包括处理第一组数据分组和第二组数据分组以创建一组合成数据分组，并且在第一接入点处产生与基于所得到的数据分组相关的操作机车的通信 。

公开(公告)号：US08731003B2

公开(公告)日：2014-05-20

申请号：US12688022

申请日：2010-01-15

申请人： Heikki Laamanen ,  Markus Hurme ,  Kenneth Hann ,  Jonas Lundqvist

发明人： Heikki Laamanen ,  Markus Hurme ,  Kenneth Hann ,  Jonas Lundqvist

IPC分类号： H04J3/06

CPC分类号： H04J3/0641 ,  H04J3/0667 ,  H04J3/0676 ,  H04J3/14

摘要： An arrangement for adjusting a clock signal in a network element of a communications network includes a processor device arranged to produce a control variable containing information about synchronization messages received from at least two other network elements. A situation in which the reception from a sending network element of synchronization messages of a good enough quality ceases will not significantly disturb the clock signal to be adjusted because only part of the control variable used for the adjustment depends on synchronization messages sent by an individual network element. In a preferred arrangement, the reference value of the control variable is changed in response to a situation where the reception from a sending network element of synchronization messages of a good enough quality ceases. Thus it is possible to reduce the change of the difference between the control variable and its reference value which further reduces disturbances caused in the clock signal to be adjusted.

摘要翻译： 用于调整通信网络的网络元件中的时钟信号的装置包括被配置为产生包含关于从至少两个其它网络元件接收的同步消息的信息的控制变量的处理器设备。 由于仅用于调整的控制变量的一部分取决于由各个网络发送的同步消息，否则来自具有足够好的质量的同步消息的发送网络元件的接收停止将不会显着地干扰要调整的时钟信号 元件。 在优选的布置中，控制变量的参考值响应于来自具有足够好质量的同步消息的发送网络元素的接收停止的情况而改变。 因此，可以减小控制变量与其参考值之间的差异的变化，这进一步减少了要调整的时钟信号引起的干扰。

公开(公告)号：US20140086375A1

公开(公告)日：2014-03-27

申请号：US14060503

申请日：2013-10-22

申请人： Aviat U.S., Inc.

发明人： Philip Secker ,  Peter Croy

IPC分类号： H04J3/06

CPC分类号： H04W56/0015 ,  H03L7/08 ,  H03L7/18 ,  H03L2207/50 ,  H04J3/0602 ,  H04J3/0617 ,  H04J3/0638 ,  H04J3/0641 ,  H04J3/0647 ,  H04J3/065 ,  H04J3/0658 ,  H04J3/0679 ,  H04J3/0688

摘要： In some embodiments, a system comprises a clock, a root node, a radio channel network, and first and second child nodes. The clock may be configured to generate a clock signal. The root node may be configured to generate a first frame including a first payload and a first overhead and generate a second frame including a second payload and a second overhead. The first and second overheads may comprise a synchronization value based on the clock signal. The radio channel network may be in communication with the root node for transmitting the first and second frames. Each first and second child nodes may be configured to perform clock recovery including frequency synchronization using the synchronization value and a respective phase-lock loop.

摘要翻译： 在一些实施例中，系统包括时钟，根节点，无线电信道网络以及第一和第二子节点。 时钟可以被配置为产生时钟信号。 根节点可以被配置为生成包括第一有效载荷和第一开销的第一帧，并且生成包括第二有效载荷和第二开销的第二帧。 第一和第二开销可以包括基于时钟信号的同步值。 无线电信道网络可以与根节点进行通信，用于发送第一和第二帧。 每个第一和第二子节点可以被配置为执行包括使用同步值的频率同步的时钟恢复和相应的锁相环。