公开(公告)号：US11575493B2

公开(公告)日：2023-02-07

申请号：US17245704

申请日：2021-04-30

Applicant: Huawei Technologies Co., Ltd.

Inventor： Yueping Leng ,  Kuichao Song

IPC: H04L7/00 ,  H04B3/54

Abstract: A time synchronization method, applied to a power-line communication (PLC) network that includes a head end node and at least one tail end node coupled to the head end node. The method includes the head end node generates data about voltage zero-crossing points based on reference time, where the data about the voltage zero-crossing points includes zero-crossing time points of the voltage zero-crossing points. When a first timing point arrives, the head end node sends first information to the tail end node, where the first information includes a timestamp of a first zero-crossing point, the first zero-crossing point is a voltage zero-crossing point closest to the first timing point, and the timestamp of the first zero-crossing point is used by the tail end node to determine a zero-crossing time point of a second zero-crossing point.

公开(公告)号：US20210344475A1

公开(公告)日：2021-11-04

申请号：US17245704

申请日：2021-04-30

Applicant: Huawei Technologies Co., Ltd.

Inventor： Yueping Leng ,  Kuichao Song

IPC: H04L7/00 ,  H04B3/54

Abstract: A time synchronization method, applied to a power-line communication (PLC) network that includes a head end node and at least one tail end node coupled to the head end node. The method includes the head end node generates data about voltage zero-crossing points based on reference time, where the data about the voltage zero-crossing points includes zero-crossing time points of the voltage zero-crossing points. When a first timing point arrives, the head end node sends first information to the tail end node, where the first information includes a timestamp of a first zero-crossing point, the first zero-crossing point is a voltage zero-crossing point closest to the first timing point, and the timestamp of the first zero-crossing point is used by the tail end node to determine a zero-crossing time point of a second zero-crossing point.