公开(公告)号：US08718213B2

公开(公告)日：2014-05-06

申请号：US13625833

申请日：2012-09-24

Applicant: Huawei Technologies Co., Ltd.

Inventor： Guijin Xu ,  Guozhu Long ,  Ruzhou Feng

IPC: H04L7/00

CPC classification number: H04L7/0012 ,  H04J3/0638 ,  H04J3/065

Abstract: A clock synchronization method, apparatus, and system are provided according to the embodiments of the present invention. The method includes: receiving time information TM1 from a central office side, in which the time information TM1 is obtained by the central office side by reading a local clock of the central office side when transmission data at a first designated location starts to be transferred, and the local clock of the central office side is synchronous with a Global Positioning System (GPS) clock or a Building Integrated Timing Supply (BITS) clock; determining whether transmission data at a second designated location starts to be received, if so, reading a local clock of the Customer Premises Equipment side to obtain time information TS1; and synchronizing a clock frequency of the Customer Premises Equipment side to the central office side according to the time information TM1 and the time information TS1.

Abstract translation: 根据本发明的实施例提供时钟同步方法，装置和系统。 该方法包括：当从第一指定位置的传输数据开始传输时，从中心局接收时间信息TM1，其中时间信息TM1由中心局通过读取中心局侧的本地时钟获得， 并且中心局的本地时钟与全球定位系统（GPS）时钟或建筑集成定时供应（BITS）时钟同步; 确定是否开始接收第二指定位置的传输数据，如果是，则读取客户驻地设备侧的本地时钟以获得时间信息TS1; 以及根据时间信息TM1和时间信息TS1将客户驻地设备侧的时钟频率与中心局侧进行同步。

公开(公告)号：US20130223577A1

公开(公告)日：2013-08-29

申请号：US13856866

申请日：2013-04-04

Applicant: Huawei Technologies Co., Ltd.

Inventor： Guijin Xu ,  Guozhu Long ,  Ruzhou Feng

IPC: H04L7/04

CPC classification number: H04L7/04 ,  H04J3/06 ,  H04J3/0685 ,  H04L27/2663 ,  H04L27/2672 ,  H04L27/2676 ,  H04L27/2682 ,  H04L27/2688 ,  H04L27/2691

Abstract: A method, apparatus, and system for time synchronization are disclosed. The method comprising: obtaining a master sending time stamp, a slave receiving time stamp, a slave sending time stamp, and a master receiving time stamp; and adjusting the time of the slave clock according to the offset calculated from the time stamps to synchronize with the clock time of the master clock. With the present invention, in passband transmission systems that transmit signals continuously in units of symbols, the time synchronization is implemented between the master clock and the slave clock.

Abstract translation: 公开了一种用于时间同步的方法，装置和系统。 该方法包括：获得主发送时间戳，从接收时间戳，从发送时间戳和主接收时间戳; 并根据从时间戳计算的偏移量调整从时钟的时间，以与主时钟的时钟时间同步。 利用本发明，在以符号为单位连续发送信号的通带传输系统中，在主时钟和从时钟之间实现时间同步。

公开(公告)号：US09007989B2

公开(公告)日：2015-04-14

申请号：US13856866

申请日：2013-04-04

Applicant: Huawei Technologies Co., Ltd.

Inventor： Guijin Xu ,  Guozhu Long ,  Ruzhou Feng

IPC: H04B7/212 ,  H04J3/06 ,  H04L12/28 ,  H04L7/00 ,  H04L7/04 ,  H04L27/26

CPC classification number: H04L7/04 ,  H04J3/06 ,  H04J3/0685 ,  H04L27/2663 ,  H04L27/2672 ,  H04L27/2676 ,  H04L27/2682 ,  H04L27/2688 ,  H04L27/2691

Abstract: A method, apparatus, and system for time synchronization are disclosed. The method comprising: obtaining a master sending time stamp, a slave receiving time stamp, a slave sending time stamp, and a master receiving time stamp; and adjusting the time of the slave clock according to the offset calculated from the time stamps to synchronize with the clock time of the master clock. With the present invention, in passband transmission systems that transmit signals continuously in units of symbols, the time synchronization is implemented between the master clock and the slave clock.

Abstract translation: 公开了一种用于时间同步的方法，装置和系统。 该方法包括：获得主发送时间戳，从接收时间戳，从发送时间戳和主接收时间戳; 并根据从时间戳计算的偏移量调整从时钟的时间，以与主时钟的时钟时间同步。 利用本发明，在以符号为单位连续发送信号的通带传输系统中，在主时钟和从时钟之间实现时间同步。