公开(公告)号：US09065748B2

公开(公告)日：2015-06-23

申请号：US13890304

申请日：2013-05-09

申请人： Alcatel-Lucent Canada Inc.

发明人： Kin Yee Wong ,  Peter Roberts

IPC分类号： H04J3/06 ,  G01R31/08 ,  H04L12/66 ,  H04L12/801 ,  H04L12/841

CPC分类号： H04L47/12 ,  H04L47/283

摘要： A method and system are provided for allowing time-alignment of teleprotection measurements of power signals. Teleprotection observations are communicated between teleprotection ends through a packet switched network. At each end of a teleprotection segment, a teleprotection device communicates with the network through a router providing CES and located at the edge of the network. Clocks within the two routers are synchronized using IEEE 1588v2 signals. Using this synchronization, accurate one-way latency of data through the network between the two routers in each direction can be determined. The router at the incoming end of the faster path delays playout of packets by the difference between the two one-way latencies, thereby ensuring time-alignment of observations as they are sent from the routers to the teleprotection devices.

摘要翻译： 提供了一种方法和系统，用于允许功率信号的远程保护测量的时间对准。 远程保护观测通过分组交换网络在远程保护端之间进行通信。 在远程保护段的每一端，远程保护设备通过提供CES并位于网络边缘的路由器与网络进行通信。 两台路由器之间的时钟使用IEEE 1588v2信号进行同步。 使用该同步，可以确定在每个方向上两个路由器之间通过网络的数据的精确单向延迟。 路由器在较快路径的入站端延迟了两个单向延迟之间差异的数据包播放，从而确保观测从路由器发送到远程保护设备时的时间对齐。

公开(公告)号：US20140348278A1

公开(公告)日：2014-11-27

申请号：US13899720

申请日：2013-05-22

申请人： Alcatel-Lucent Canada Inc.

发明人： Kin Yee Wong ,  Peter Roberts

IPC分类号： H04L7/00

CPC分类号： H04J3/0638 ,  H04J3/0658 ,  H04J3/0688 ,  H04J3/12 ,  H04J3/14

摘要： A method and system are provided for improving maintenance of timing information when a node enters holdover due to a lost connection between a sub-network and a reference clock. Each node within the sub-network sends information concerning the drift of its local oscillator to a single node, and the single node uses this information to determine timing information for the entire sub-network. The single node may also use knowledge of the characteristics of the local oscillators. In this way, drift from the reference clock can be minimized without incurring significant added hardware costs.

摘要翻译： 提供了一种方法和系统，用于在节点由于子网与参考时钟之间的丢失连接而进入保持状态时改善维护定时信息。 子网内的每个节点向本地振荡器发送有关本地振荡器漂移的信息，单个节点使用该信息来确定整个子网的定时信息。 单个节点还可以使用本地振荡器的特性的知识。 以这种方式，可以使参考时钟的漂移最小化，而不会导致显着增加的硬件成本。

公开(公告)号：US20160294545A1

公开(公告)日：2016-10-06

申请号：US14674012

申请日：2015-03-31

申请人： ALCATEL-LUCENT CANADA INC.

发明人： Kin-Yee Wong ,  Ian Leighton ,  Peter Roberts

IPC分类号： H04L7/10

CPC分类号： H04J3/0641 ,  H04J3/0667 ,  H04J3/0685 ,  H04L7/10

摘要： A method and system are provided for synchronizing local clocks more quickly in a telecommunication network using IEEE 1588. A network element that receives timing signals from one or more possible parent clocks considers a measure of the reliability of the timing signals contained in Announce messages from the parent clock or clocks. The clock uses this reliability information in selecting one of the possible parent clock or clocks to use as the actual parent clock. Once the selection is made, the clock adjusts the filtering characteristics applied to timing signals received from the selected parent clock. The adjustments reflect how confident the parent clock is as to how stable the timing information, it provides has become. If the indication of reliability contained in Announce messages received from the parent clock indicates that the timing information is not very reliable, then a high filter bandwidth is used in filtering the timing signals. If the indication of reliability contained in Announce messages indicates that the timing information is reliable, such as by crossing a threshold, then the clock shifts to a normal low bandwidth filtering. By using reliability information in the Announce messages, clocks can better make selections as to which parent clock to use, and can use the reliability information to more quickly synchronize themselves with a grandmaster clock.

摘要翻译： 提供了一种用于使用IEEE 1588在电信网络中更快地同步本地时钟的方法和系统。从一个或多个可能的母时钟接收定时信号的网络元件考虑了包含在来自 父时钟或时钟。 时钟使用这种可靠性信息来选择一个可能的父时钟或时钟作为实际的父时钟。 一旦进行选择，时钟调整应用于从所选择的母时钟接收的定时信号的滤波特性。 调整反映了时钟信息的稳定性，它提供的时钟信息的信心如何。 如果从母时钟接收到的通知消息中包含的可靠性指示表明定时信息不太可靠，则在滤波定时信号时使用高滤波器带宽。 如果Announce消息中包含的可靠性指示表示定时信息是可靠的，例如通过跨越阈值，则时钟转移到正常的低带宽滤波。 通过在Announce消息中使用可靠性信息，时钟可以更好地选择要使用的父时钟，并且可以使用可靠性信息更快地与自己的主机时钟同步。

公开(公告)号：US09531530B2

公开(公告)日：2016-12-27

申请号：US14674012

申请日：2015-03-31

申请人： ALCATEL-LUCENT CANADA INC.

发明人： Kin-Yee Wong ,  Ian Leighton ,  Peter Roberts

IPC分类号： H04L7/10 ,  H04J3/06

CPC分类号： H04J3/0641 ,  H04J3/0667 ,  H04J3/0685 ,  H04L7/10

摘要： A method and system are provided for synchronizing local clocks more quickly in a telecommunication network using IEEE 1588. A network element that receives timing signals from one or more possible parent clocks considers a measure of the reliability of the timing signals contained in Announce messages from the parent clock or clocks. The clock uses this reliability information in selecting one of the possible parent clock or clocks to use as the actual parent clock. Once the selection is made, the clock adjusts the filtering characteristics applied to timing signals received from the selected parent clock. The adjustments reflect how confident the parent clock is as to how stable the timing information, it provides has become. If the indication of reliability contained in Announce messages received from the parent clock indicates that the timing information is not very reliable, then a high filter bandwidth is used in filtering the timing signals. If the indication of reliability contained in Announce messages indicates that the timing information is reliable, such as by crossing a threshold, then the clock shifts to a normal low bandwidth filtering. By using reliability information in the Announce messages, clocks can better make selections as to which parent clock to use, and can use the reliability information to more quickly synchronize themselves with a grandmaster clock.

摘要翻译： 提供了一种用于使用IEEE 1588在电信网络中更快地同步本地时钟的方法和系统。从一个或多个可能的母时钟接收定时信号的网络元件考虑了包含在来自 父时钟或时钟。 时钟使用这种可靠性信息来选择一个可能的父时钟或时钟作为实际的父时钟。 一旦进行选择，时钟调整应用于从所选择的母时钟接收的定时信号的滤波特性。 调整反映了时钟信息的稳定性，它提供的时钟信息的信心如何。 如果从母时钟接收到的通知消息中包含的可靠性指示表明定时信息不太可靠，则在滤波定时信号时使用高滤波器带宽。 如果Announce消息中包含的可靠性指示表示定时信息是可靠的，例如通过跨越阈值，则时钟转移到正常的低带宽滤波。 通过在Announce消息中使用可靠性信息，时钟可以更好地选择要使用的父时钟，并且可以使用可靠性信息更快地与自己的主机时钟同步。

公开(公告)号：US20140334311A1

公开(公告)日：2014-11-13

申请号：US13890304

申请日：2013-05-09

申请人： ALCATEL-LUCENT CANADA INC.

发明人： Kin Yee Wong ,  Peter Roberts

IPC分类号： H04L12/801

CPC分类号： H04L47/12 ,  H04L47/283

摘要： A method and system are provided for allowing time-alignment of teleprotection measurements of power signals. Teleprotection observations are communicated between teleprotection ends through a packet switched network. At each end of a teleprotection segment, a teleprotection device communicates with the network through a router providing CES and located at the edge of the network. Clocks within the two routers are synchronized using IEEE 1588v2 signals. Using this synchronization, accurate one-way latency of data through the network between the two routers in each direction can be determined. The router at the incoming end of the faster path delays playout of packets by the difference between the two one-way latencies, thereby ensuring time-alignment of observations as they are sent from the routers to the teleprotection devices.

摘要翻译： 提供了一种方法和系统，用于允许功率信号的远程保护测量的时间对准。 远程保护观测通过分组交换网络在远程保护端之间进行通信。 在远程保护段的每一端，远程保护设备通过提供CES并位于网络边缘的路由器与网络进行通信。 两台路由器之间的时钟使用IEEE 1588v2信号进行同步。 使用该同步，可以确定在每个方向上两个路由器之间通过网络的数据的精确单向延迟。 路由器在较快路径的入站端延迟了两个单向延迟之间差异的数据包播放，从而确保观测从路由器发送到远程保护设备时的时间对齐。

公开(公告)号：US09722772B2

公开(公告)日：2017-08-01

申请号：US14499686

申请日：2014-09-29

申请人： ALCATEL-LUCENT CANADA INC.

发明人： Peter Roberts ,  Ian Leighton ,  Kin-Yee Wong

IPC分类号： H04L7/00 ,  H04L7/04 ,  H04J3/06

CPC分类号： H04L7/04 ,  H04J3/0641 ,  H04J3/0667 ,  H04L7/0008

摘要： An intermediate clock, either a boundary or a transparent clock, may have to adjust its local clock to match that of a grandmaster clock. If such adjustment is frequent or large, then the intermediate clock may not have much confidence in the reliability of the timing information it passes to a downstream clock in an IEEE 1588 Announce message even if the quality of its local clock is high. The intermediate clock determines a measure of the reliability of its timing information. The intermediate clock inserts an indication of the reliability of the timing information in a transmitted IEEE 1588 Announce message. The intermediate clock may consider an indication of reliability found in an Announce message it receives when inserting an indication of the reliability of timing information into an Announce message which it transmits.

公开(公告)号：US09331804B2

公开(公告)日：2016-05-03

申请号：US13899720

申请日：2013-05-22

申请人： Alcatel-Lucent Canada Inc.

发明人： Kin Yee Wong ,  Peter Roberts

IPC分类号： H04L7/00 ,  H04J3/06 ,  H04J3/12 ,  H04J3/14

CPC分类号： H04J3/0638 ,  H04J3/0658 ,  H04J3/0688 ,  H04J3/12 ,  H04J3/14

摘要： A method and system are provided for improving maintenance of timing information when a node enters holdover due to a lost connection between a sub-network and a reference clock. Each node within the sub-network sends information concerning the drift of its local oscillator to a single node, and the single node uses this information to determine timing information for the entire sub-network. The single node may also use knowledge of the characteristics of the local oscillators. In this way, drift from the reference clock can be minimized without incurring significant added hardware costs.

摘要翻译： 提供了一种方法和系统，用于在节点由于子网与参考时钟之间的丢失连接而进入保持状态时改善维护定时信息。 子网内的每个节点向本地振荡器发送有关本地振荡器漂移的信息，单个节点使用该信息来确定整个子网的定时信息。 单个节点还可以使用本地振荡器的特性的知识。 以这种方式，可以使参考时钟的漂移最小化，而不会导致显着增加的硬件成本。

公开(公告)号：US20160094335A1

公开(公告)日：2016-03-31

申请号：US14499686

申请日：2014-09-29

申请人： ALCATEL-LUCENT CANADA INC.

发明人： Peter Roberts ,  Ian Leighton ,  Kin-Yee Wong

IPC分类号： H04L7/04 ,  H04L7/00

CPC分类号： H04L7/04 ,  H04J3/0641 ,  H04J3/0667 ,  H04L7/0008

摘要： An intermediate clock, either a boundary clock or a transparent clock, may have to adjust its local clock to match that of a grandmaster clock. If such adjustment is frequent or large, then the intermediate clock may not have much confidence in the reliability of the timing information it passes to a downstream clock in an IEEE 1588 Announce message even if the quality of its local clock is high. The intermediate clock determines a measure of the reliability of its timing information. The intermediate clock inserts an indication of the reliability of the timing information in a transmitted IEEE 1588 Announce message. The intermediate clock may consider an indication of reliability found in an Announce message it receives when inserting an indication of the reliability of timing information into an Announce message which it transmits.

摘要翻译： 中间时钟（边界时钟或透明时钟）可能必须调整其本地时钟以与主机时钟相匹配。 如果这种调整频繁或较大，则即使其本地时钟的质量较高，中间时钟也可能对IEEE 1588 Announce消息中的下行时钟的定时信息的可靠性没有太大的信心。 中间时钟确定其定时信息的可靠性的度量。 中间时钟在发送的IEEE 1588 Announce消息中插入定时信息的可靠性的指示。 当将定时信息的可靠性的指示插入到其发送的公告消息中时，中间时钟可以考虑在其接收的公告消息中找到的可靠性的指示。