公开(公告)号：US20150372776A1

公开(公告)日：2015-12-24

申请号：US14646146

申请日：2013-11-15

Applicant: ZTE CORPORATION

Inventor： Li He ,  Hongbin Shi

IPC: H04J3/06 ,  H04L7/00 ,  H04B10/079

CPC classification number: H04L7/0075 ,  H04B10/073 ,  H04B10/0795 ,  H04B10/27 ,  H04J3/0667 ,  H04J3/0682 ,  H04L5/1469

Abstract: A synchronization system for detecting asymmetry of optical fibres is provided, which includes a time synchronization correction device, a time delay compensation unit and an optical module device, wherein the optical module device is configured to detect a pulse transmission time delay difference and an asymmetry distance of bidirectional optical fibres between network elements on two sides and to obtain an asymmetry time delay of the bidirectional optical fibres according to the asymmetry distance of the bidirectional optical fibres and the pulse transmission time delay difference. A synchronization method for detecting asymmetry of optical fibres is also provided, which includes obtaining an asymmetry time delay of bidirectional optical fibres according to an asymmetry distance of the bidirectional optical fibres and a pulse transmission time delay difference. A master optical module device and a slave optical module device for detecting asymmetry of optical fibres are also provided.

Abstract translation: 提供了一种用于检测光纤不对称的同步系统，其包括时间同步校正装置，时间延迟补偿单元和光学模块装置，其中光学模块装置被配置为检测脉冲传输时间延迟差异和不对称距离 在双向光纤之间的双向光纤之间，并且根据双向光纤的不对称距离和脉冲传输时间延迟差异获得双向光纤的不对称时间延迟。 还提供了一种用于检测光纤不对称的同步方法，其包括根据双向光纤的不对称距离获得双向光纤的不对称时间延迟和脉冲传输时间延迟差异。 还提供了用于检测光纤不对称的主光模块装置和从光模块装置。

公开(公告)号：US12028156B2

公开(公告)日：2024-07-02

申请号：US17633329

申请日：2020-07-28

Applicant: ZTE Corporation

Inventor： Linlin Wang ,  Li He

IPC: H04J3/06 ,  H04L7/00 ,  H04L7/04

CPC classification number: H04J3/0641 ,  H04J3/0658 ,  H04L7/0004 ,  H04L7/04

Abstract: A time synchronization method, a time synchronization sender, a time synchronization receiver and a time synchronization system are provided. The method includes: determining whether at least one parameter causing recalculation of a best master clock (BMC) algorithm changes; in a case where it is determined that the parameter changes, sending a 1588 standard-based Announce message; and in a case where it is determined that the parameter does not change, sending a keep-alive message of the Announce message. In the present disclosure, by distinguishing keep-alive messages from protocol messages, the problem that a CPU system is busy due to the processing of Announce messages is solved, thereby realizing the optimization of the 1588 protocol, and reducing the impact on the CPU.

公开(公告)号：US09762318B2

公开(公告)日：2017-09-12

申请号：US14426070

申请日：2013-07-10

Applicant: ZTE Corporation

Inventor： Jianxin Xu ,  Li He ,  Liang Xia

IPC: H04B10/071 ,  H04B10/25 ,  H04L7/00

CPC classification number: H04B10/071 ,  H04B10/25 ,  H04L7/0075

Abstract: A time synchronization apparatus and method for automatically detecting the asymmetry of an optical fiber. The apparatus comprises an OTDR asymmetry detecting module (12), a time delay compensating module (14) and a time synchronization correcting module (16), the OTDR asymmetry detecting module (12) comprises an emitting unit (122) used for emitting a detection signal to the optical fiber, a receiving unit (124) used for receiving the detection signal returned by the optical fiber, a transmission time delay determining unit (126) used for determining the transmission time delay of the detection signal in the optical fiber according to the time difference between the emitting detection signal and the returned detection signal, and the determining transmission time delay of a service signal in the optical fiber according to the transmission time delay of the detection signal; The time delay compensating module (14) is used for calculating asymmetric time delay value between the first optical fiber and the second optical fiber according to the transmission time delay of the first optical fiber and the transmission time delay of the second optical fiber; The time synchronization correcting module (16) is used for synchronization correcting time according to the asymmetry time delay. The apparatus and method can improve the time synchronism precision.

公开(公告)号：US09590798B2

公开(公告)日：2017-03-07

申请号：US14646146

申请日：2013-11-15

Applicant: ZTE Corporation

Inventor： Li He ,  Hongbin Shi

IPC: H04L7/00 ,  H04B10/073 ,  H04B10/27 ,  H04B10/079 ,  H04J3/06 ,  H04L5/14

CPC classification number: H04L7/0075 ,  H04B10/073 ,  H04B10/0795 ,  H04B10/27 ,  H04J3/0667 ,  H04J3/0682 ,  H04L5/1469

Abstract: A synchronization system for detecting asymmetry of optical fibers is provided, which includes a time synchronization correction device, a time delay compensation unit and an optical module device, wherein the optical module device is configured to detect a pulse transmission time delay difference and an asymmetry distance of bidirectional optical fibers between network elements on two sides and to obtain an asymmetry time delay of the bidirectional optical fibers according to the asymmetry distance of the bidirectional optical fibers and the pulse transmission time delay difference. A synchronization method for detecting asymmetry of optical fibers is also provided, which includes obtaining an asymmetry time delay of bidirectional optical fibers according to an asymmetry distance of the bidirectional optical fibers and a pulse transmission time delay difference. A master optical module device and a slave optical module device for detecting asymmetry of optical fibers are also provided.

Abstract translation: 提供了一种用于检测光纤不对称的同步系统，其包括时间同步校正装置，时间延迟补偿单元和光学模块装置，其中光学模块装置被配置为检测脉冲传输时间延迟差异和不对称距离 在双向光纤之间的双向光纤之间，并且根据双向光纤的不对称距离和脉冲传输时间延迟差异获得双向光纤的不对称时间延迟。 还提供了一种用于检测光纤不对称的同步方法，其包括根据双向光纤的不对称距离获得双向光纤的不对称时间延迟和脉冲传输时间延迟差异。 还提供了用于检测光纤不对称的主光模块装置和从光模块装置。

公开(公告)号：US09577774B2

公开(公告)日：2017-02-21

申请号：US14758619

申请日：2013-12-12

Applicant: ZTE Corporation

Inventor： Junhui Zhang ,  Dongjia Liu ,  Li He ,  Liang Xia ,  Bin Wang ,  Hongguang Zhao

IPC: H04J3/06

CPC classification number: H04J3/0667 ,  H04J3/0641

Abstract: Disclosed are a time synchronization method and system. The method comprises: an NE1 and the upstream nodes of the NE1 are classified into the first level, and the downstream nodes of the NE1 are classified into the second level, where the first level priority of the first level is higher than the second level priority of the second level; an NE3 connected to the NE1 through a PTP synchronization link in the downstream node receives a first device priority of the NE1 and the first level priority from the NE1; and after the NE3 receives the second device priority of an NE2 and the second level priority sent by the NE2 in the downstream nodes which is connected to the NE1 through the 1PPS+TOD synchronization link, determines that a clock parameter of the NE1 is optimal, and synchronizes the local clock to the NE1.

Abstract translation: 公开了一种时间同步方法和系统。 该方法包括：NE1和NE1的上游节点分为第一级，NE1的下游节点分为第一级，其中第一级的第一级优先级高于第二级优先级 的二级; 通过下游节点的PTP同步链路连接到NE1的NE3从NE1接收到NE1的第一设备优先级和第一级优先级; 在NE3接收到NE2的第二设备优先级和NE2在通过1PPS + TOD同步链路连接到NE1的下游节点发送的第二级优先级后，确定NE1的时钟参数为最佳， 并将本地时钟同步到NE1。

公开(公告)号：US11476962B2

公开(公告)日：2022-10-18

申请号：US16976753

申请日：2019-02-27

Applicant: ZTE CORPORATION

Inventor： Li He ,  Xia Li

IPC: H04J3/06 ,  H04L7/00

Abstract: The present application discloses a method for determining time information, including: detecting a signal of a periodic block, and recording a timestamp of the periodic block; and determining a time at which a time information message to be sent according to the timestamp of the periodic block matched with the time information message, and generating a timestamp of the time information message. The present application further discloses an apparatus and device for determining time information, and a storage medium.

公开(公告)号：US10181919B2

公开(公告)日：2019-01-15

申请号：US15311192

申请日：2014-09-12

Applicant: ZTE CORPORATION

Inventor： Junhui Zhang ,  Li He ,  Bin Wang ,  Lin Wen ,  Hongguang Zhao

IPC: H04J3/06 ,  H04J3/12 ,  H04J3/14 ,  H04L12/24

Abstract: The present document discloses a synchronization method, herein the method includes a controller determining synchronization link topology information according to physical link topology information of the synchronous network and synchronization information of a synchronous node in the synchronous network; the controller generating a synchronization rule of the synchronous node according to the synchronization link topology information; and the controller transmitting the synchronization rule and/or a request message to the synchronous node in the synchronous network according to the synchronization link topology information. The present document further discloses a controller, a synchronous node, a synchronous network, and a storage medium.

公开(公告)号：US20150229388A1

公开(公告)日：2015-08-13

申请号：US14426070

申请日：2013-07-10

Applicant: ZTE Corporation

Inventor： Jianxin Xu ,  Li He ,  Liang Xia

IPC: H04B10/071 ,  H04B10/25 ,  H04L7/00

CPC classification number: H04B10/071 ,  H04B10/25 ,  H04L7/0075

Abstract: A time synchronization apparatus and method for automatically detecting the asymmetry of an optical fiber. The apparatus comprises an OTDR asymmetry detecting module (12), a time delay compensating module (14) and a time synchronization correcting module (16), the OTDR asymmetry detecting module (12) comprises an emitting unit (122) used for emitting a detection signal to the optical fiber, a receiving unit (124) used for receiving the detection signal returned by the optical fiber, a transmission time delay determining unit (126) used for determining the transmission time delay of the detection signal in the optical fiber according to the time difference between the emitting detection signal and the returned detection signal, and the determining transmission time delay of a service signal in the optical fiber according to the transmission time delay of the detection signal; The time delay compensating module (14) is used for calculating asymmetric time delay value between the first optical fiber and the second optical fiber according to the transmission time delay of the first optical fiber and the transmission time delay of the second optical fiber; The time synchronization correcting module (16) is used for synchronization correcting time according to the asymmetry time delay. The apparatus and method can improve the time synchronism precision.

Abstract translation: 一种用于自动检测光纤的不对称性的时间同步装置和方法。 该装置包括OTDR不对称检测模块（12），时间延迟补偿模块（14）和时间同步校正模块（16），所述OTDR不对称检测模块（12）包括用于发射检测的发射单元（122） 信号到光纤，用于接收由光纤返回的检测信号的接收单元（124），用于确定根据光纤的光纤中的检测信号的传输时间延迟的传输时间延迟确定单元（126） 发射检测信号和返回的检测信号之间的时间差，以及根据检测信号的传输时间延迟确定光纤中的服务信号的传输时间延迟; 延时补偿模块（14）用于根据第一光纤的传输时间延迟和第二光纤的传输时间延迟来计算第一光纤与第二光纤之间的非对称时间延迟值; 根据不对称时间延迟，时间同步校正模块（16）用于同步校正时间。 该装置和方法可以提高时间同步精度。

公开(公告)号：US20150215108A1

公开(公告)日：2015-07-30

申请号：US14356205

申请日：2012-04-18

Applicant: Jianxin XU ,  Li HE ,  ZTE CORPORATION

Inventor： Jianxin Xu ,  Li He

IPC: H04L7/00

CPC classification number: H04L7/0016 ,  H04J3/0667 ,  H04J3/14 ,  H04L41/064 ,  H04L43/106

Abstract: A method and a device for detecting a 1588 time error between network elements are disclosed. The method includes: a 1588 time network is established for an entire network; when it is required to detect a 1588 time error between a network element and its opposite network element, the network elements transmit, probe packets, each including a local timestamp to each other; and the network element receiving a probe packet calculates, according to a preset time difference algorithm, a time difference between the local timestamp and the timestamp in the probe packet, determines, according to the time difference, whether there is a failure in a detection path, and reports an alarm when there is a failure in the detection path. The disclosure prevents erroneous time transmission due to the time error, thus ensuring the network stability.

Abstract translation: 公开了一种用于检测网络元件之间的1588时间误差的方法和装置。 该方法包括：为整个网络建立1588时间网络; 当需要检测网元与其相对网元之间的1588时间误差时，网元将每个包含本地时间戳的探测包发送给彼此; 并且接收探测分组的网络单元根据预设的时差算法，计算探测分组中的本地时间戳与时间戳之间的时间差，根据时差确定检测路径中是否存在故障 ，并在检测路径出现故障时报告。 本公开防止由于时间错误而导致错误的时间传输，从而确保网络的稳定性。