公开(公告)号：US12132567B2

公开(公告)日：2024-10-29

申请号：US17687056

申请日：2022-03-04

Applicant: Huawei Technologies Co., Ltd.

Inventor： Jingfei Lv ,  Dejian Xu ,  Xiaoxia Li

IPC: H04J3/06

CPC classification number: H04J3/0658

Abstract: A method includes receiving, by a first node on a first port of the first node, a first packet from a second node; and when the first packet carries a first flag, avoid selecting, by the first node and when selecting a clock source, a clock source corresponding to the first port, where the first flag indicates that time synchronization of the second node is uncertain.

公开(公告)号：US11811501B2

公开(公告)日：2023-11-07

申请号：US17360059

申请日：2021-06-28

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Jingfei Lv ,  Song Liu ,  Chuan Xu

IPC: H04J3/06

CPC classification number: H04J3/0644 ,  H04J3/0641 ,  H04J3/0658 ,  H04J3/0679

Abstract: This application discloses a clock synchronization method and apparatus, and related storage medium, and pertains to the field of communications technologies. A network device receives an announce message from a first master clock node and an announce message from a second master clock node; and when an identifier of a first clock source node carried in the announce message of the first master clock node is the same as an identifier of a second clock source node carried in the announce message of the second master clock node, selects a master clock node with a smaller clock deviation from the first master clock node and the second master clock node, and then calibrates a clock of the network device based on time information of the master clock node. The precision of clock synchronization by the network device is improved.

公开(公告)号：US20230034757A1

公开(公告)日：2023-02-02

申请号：US17965117

申请日：2022-10-13

Applicant: Huawei Technologies Co., Ltd.

Inventor： Tongfu Wu ,  Tao He ,  Jingfei Lv ,  Hao Li ,  Jinhui Wang

IPC: H04L7/00 ,  H04J3/06

Abstract: A method, a device, and a system, the method including determining, by a management device, a first transmission path that is in a network system and that is used to transmit a clock packet of a target clock source, sending, by the management device, configuration information for the first transmission path to a plurality of network devices on the first transmission path, receiving, by the management device, information that is sent by an endpoint network device on the first transmission path and that is used to determine a time difference, and sending, by the management device, a corresponding clock compensation value to at least one network device on the first transmission path based on the information that is used to determine the time difference.

公开(公告)号：US11540238B2

公开(公告)日：2022-12-27

申请号：US17201407

申请日：2021-03-15

Applicant: Huawei Technologies Co., Ltd.

Inventor： Jingfei Lv ,  Yawei Zhang

IPC: H04W56/00

Abstract: A method for synchronizing a network device includes: receiving, by the network device, a first SSM and a second SSM, where the first SSM carries a first SSM code for indicating a quality level of a first clock source and a first eSSM code for indicating the quality level of the first clock source, and the second SSM carries a second SSM code for indicating a quality level of a second clock source and a second eSSM code for indicating the quality level of the second clock source. When a value of the first SSM code is less than a value of the second SSM code, the network device calibrates a frequency of the network device based on a timing signal of the first clock source.

公开(公告)号：US20210409140A1

公开(公告)日：2021-12-30

申请号：US17471676

申请日：2021-09-10

Applicant: Huawei Technologies Co., Ltd.

Inventor： Jingfei Lv ,  Boling Fan ,  Jinhui Wang ,  Liqing Chen

IPC: H04J3/06 ,  H04L7/00

Abstract: A clock synchronization packet exchanging method includes sending, by a first device in a Flexible Ethernet (FlexE) group, a first FlexE instance at a first physical layer (PHY), where the first FlexE instance includes a clock synchronization packet, and a second FlexE instance sent by the first device in the FlexE group at a second PHY also includes a clock synchronization packet. The clock synchronization packets are carried in a plurality of FlexE instances transmitted between a transmit end and a receive end in the FlexE group.

公开(公告)号：US20200287969A1

公开(公告)日：2020-09-10

申请号：US16882438

申请日：2020-05-22

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Jingfei Lv ,  Yawei Zhang

IPC: H04L29/08 ,  H04J3/06

Abstract: A network device synchronization method is provided. In various embodiments, a first SSM and a second SSM are received. The first SSM carries a first SSM code indicating a quality level of a first clock source and a first eSSM code indicating the quality level of the first clock source, the second SSM carries a second SSM code indicating a quality level of a second clock source. The second SSM lacks an eSSM code indicating the quality level of the second clock source, and a value of the first SSM code is equal to a value of the second SSM code. When a value of the first eSSM code is less than 0xFF, calibrating a frequency of the network device based on a timing signal of the first clock source.

公开(公告)号：US20190260490A1

公开(公告)日：2019-08-22

申请号：US16401996

申请日：2019-05-02

Applicant: Huawei Technologies Co., Ltd.

Inventor： Jingfei Lv ,  Jinhui Wang ,  Chuan Xu

IPC: H04J3/06

Abstract: A frequency synchronization method includes: receiving, by a slave clock, a first pulse signal and a second pulse signal; determining, by the slave clock based on a first phase difference, a second phase difference, a first delay, and a second delay, that a frequency offset of the slave clock relative to the master clock is equal to a first frequency offset, where the first phase difference is a difference between a phase of a third pulse signal generated by the slave clock and a phase of the first pulse signal received by the slave clock, and the second phase difference is a difference between a phase of a fourth pulse signal generated by the slave clock and a phase of the second pulse signal received by the slave clock; and calibrating, by the slave clock, frequency of the slave clock based on the first frequency offset.

公开(公告)号：US12160308B2

公开(公告)日：2024-12-03

申请号：US17840965

申请日：2022-06-15

Applicant: Huawei Technologies Co., Ltd.

Inventor： Jinhui Wang ,  Cong Chen ,  Jingfei Lv

IPC: H04J3/06 ,  H04B10/079

Abstract: A fiber link detection method is implemented by a first network device of an optical communications network. The fiber link detection method includes obtaining a forward delay value indicating a forward delay of transmitting a first Precision Time Protocol (PTP) packet by a second interface of a second network device to a first interface of the first network device over a fiber link. A reverse delay value indicating a reverse delay of transmitting a second PTP packet by the first interface to the second interface over the fiber link is obtained, and a determination is made, based on the forward delay value, the reverse delay value, and a first threshold, that the fiber link comprises a third network device, where the first network device and the second network device support a PTP, and where the third network device does not support the PTP.

公开(公告)号：US11750698B2

公开(公告)日：2023-09-05

申请号：US17671758

申请日：2022-02-15

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Jingfei Lv ,  Yawei Zhang

IPC: G06F15/16 ,  H04L67/1095 ,  H04J3/06

CPC classification number: H04L67/1095 ,  H04J3/0638

Abstract: A network device synchronization method is provided. In various embodiments, a first SSM and a second SSM are received. The first SSM carries a first SSM code indicating a quality level of a first clock source and a first eSSM code indicating the quality level of the first clock source, the second SSM carries a second SSM code indicating a quality level of a second clock source. The second SSM lacks an eSSM code indicating the quality level of the second clock source, and a value of the first SSM code is equal to a value of the second SSM code. When a value of the first eSSM code is less than 0xFF, calibrating a frequency of the network device based on a timing signal of the first clock source.

公开(公告)号：US11412468B2

公开(公告)日：2022-08-09

申请号：US16904051

申请日：2020-06-17

Applicant: Huawei Technologies Co., Ltd.

Inventor： Jingfei Lv ,  Yawei Zhang

IPC: H04W56/00

Abstract: A method for synchronizing a network device includes: receiving, by the network device, a first SSM and a second SSM, where the first SSM carries a first SSM code for indicating a quality level of a first clock source and a first eSSM code for indicating the quality level of the first clock source, and the second SSM carries a second SSM code for indicating a quality level of a second clock source and a second eSSM code for indicating the quality level of the second clock source. When a value of the first SSM code is less than a value of the second SSM code, the network device calibrates a frequency of the network device based on a timing signal of the first clock source.