公开(公告)号：US12184405B2

公开(公告)日：2024-12-31

申请号：US17360817

申请日：2021-06-28

Applicant: Huawei Technologies Co., Ltd.

Inventor： Jingfei Lv ,  Song Liu ,  Chuan Xu

IPC: H04J3/06 ,  H04W56/00

Abstract: This application discloses a clock synchronization method and apparatus, and a storage medium, which pertains to the field of communication technologies. The method includes: first receiving, by a network device, an announce packet from a first master clock node and an announce packet from a second master clock node, when an identifier of a first clock source node carried in the announce packet from the first master clock node is the same as an identifier of a second clock source node carried in the announce packet from the second master clock node, selecting a master clock node with a relatively small clock deviation, and then calibrating a clock of the network device based on time information of the master clock node. In this application, precision of clock synchronization performed by the network device is higher, and further, precision of a clock calibrated by the network device is higher.

公开(公告)号：US20230217382A1

公开(公告)日：2023-07-06

申请号：US18062933

申请日：2022-12-07

Applicant: Huawei Technologies Co., Ltd.

Inventor： Jingfei Lv ,  Yawei Zhang

IPC: H04J3/06 ,  H04B7/185 ,  H04W56/00

CPC classification number: H04J3/0635 ,  H04B7/18513 ,  H04W56/0015 ,  H04B17/309

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：US20220311532A1

公开(公告)日：2022-09-29

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：US12245180B2

公开(公告)日：2025-03-04

申请号：US17827189

申请日：2022-05-27

Applicant: Huawei Technologies Co., Ltd.

Inventor： Yawei Zhang ,  Jingfei Lv ,  Yong Cheng

IPC: H04W56/00 ,  H04J3/06 ,  H04L41/0677

Abstract: A method for locating a clock fault includes that a network device locates a clock fault source based on whether first frequency offsets between a plurality of input clocks and a local clock exceed a frequency offset threshold, or based on whether second frequency offsets between the input clocks exceed a relative frequency offset threshold.

公开(公告)号：US20220337384A1

公开(公告)日：2022-10-20

申请号：US17857412

申请日：2022-07-05

Applicant: Huawei Technologies Co., Ltd.

Inventor： Jingfei Lv ,  Yawei Zhang ,  Jinhui Wang ,  Hao Li

IPC: H04L7/00 ,  H04J3/06

Abstract: A clock port attribute recovery method includes a network device setting a value of a port attribute of a clock port of the network device to a first value based on the clock port not receiving any one of three types of clock messages: N synchronization messages, follow-up messages, and delay response messages within a timeout interval, where the first value indicates that a message is lost on the clock port. Based on a case that a recovery condition is met, the network device sets the value of the port attribute of the clock port to a second value, where the second value indicates that a status of the clock port is that the message is not lost.

公开(公告)号：US11038608B2

公开(公告)日：2021-06-15

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：US12149603B2

公开(公告)日：2024-11-19

申请号：US17857412

申请日：2022-07-05

Applicant: Huawei Technologies Co., Ltd.

Inventor： Jingfei Lv ,  Yawei Zhang ,  Jinhui Wang ,  Hao Li

IPC: H04L7/00 ,  H04J3/06

Abstract: A clock port attribute recovery method includes a network device setting a value of a port attribute of a clock port of the network device to a first value based on the clock port not receiving any one of three types of clock messages: N synchronization messages, follow-up messages, and delay response messages within a timeout interval, where the first value indicates that a message is lost on the clock port. Based on a case that a recovery condition is met, the network device sets the value of the port attribute of the clock port to a second value, where the second value indicates that a status of the clock port is that the message is not lost.

公开(公告)号：US11963120B2

公开(公告)日：2024-04-16

申请号：US18062933

申请日：2022-12-07

Applicant: Huawei Technologies Co., Ltd.

Inventor： Jingfei Lv ,  Yawei Zhang

IPC: H04W56/00 ,  H04B7/185 ,  H04B17/309 ,  H04J3/06

CPC classification number: H04W56/001 ,  H04B7/18513 ,  H04J3/0635 ,  H04W56/0015 ,  H04B17/309

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：US11750310B2

公开(公告)日：2023-09-05

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: H04L7/04 ,  H04J3/06 ,  H04L7/00

CPC classification number: H04J3/0667 ,  H04L7/0012 ,  H04L7/0025 ,  H04L7/0029

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：US20210212003A1

公开(公告)日：2021-07-08

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.