公开(公告)号：US08432851B2

公开(公告)日：2013-04-30

申请号：US12895326

申请日：2010-09-30

Applicant: Guijin Xu ,  Guozhu Long ,  Ruzhou Feng

Inventor： Guijin Xu ,  Guozhu Long ,  Ruzhou Feng

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

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.

公开(公告)号：US20130308712A1

公开(公告)日：2013-11-21

申请号：US13625833

申请日：2012-09-24

Applicant: Guijin XU ,  Guozhu LONG ,  Ruzhou FENG

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：US08442175B2

公开(公告)日：2013-05-14

申请号：US13184276

申请日：2011-07-15

Applicant: Guijin Xu ,  Guozhu Long ,  Ruijie Xiao ,  Zhilei Zhao ,  Xuyong Wu ,  Yuchen Jia

Inventor： Guijin Xu ,  Guozhu Long ,  Ruijie Xiao ,  Zhilei Zhao ,  Xuyong Wu ,  Yuchen Jia

IPC: H04L7/00 ,  H04B1/38

CPC classification number: H04L7/0041 ,  H04J3/0638 ,  H04M11/062

Abstract: The present invention provides a method, an apparatus, and a system for time synchronization of an xDigital Subscriber Line (xDSL). The method includes: transmitting, by a customer premises equipment (CPE), a first symbol to a central office (CO) equipment, and obtaining time Ts2 indicating the moment that the first symbol is transmitted; receiving, by the CPE, a second symbol transmitted by the CO, and obtaining time Ts1 indicating the moment that the second symbol is received; obtaining, by the CPE obtains time Tm2 indicating the moment that the first symbol is received by the CO and time Tm1 indicating the moment that the second symbol is transmitted by the CO; the CPE calculates an offset between a clock of the CPE and a clock of the CO according to Ts1, Ts2, Tm1, Tm2 and a delay of the CPE; and the CPE adjusts the clock of the CPE according to the offset to achieve synchronization. According to the present invention, by adjusting the time of the clock of the CPE and the time of the clock of the CO, the offset between the clock of the CPE and the clock of the CO can be obtained accurately to effectively achieve time synchronization between the CPE and the CO.

Abstract translation: 本发明提供了一种用于x数字用户线（xDSL）的时间同步的方法，装置和系统。 该方法包括：由客户驻地设备（CPE）向中心局（CO）设备发送第一符号，并获取指示发送第一符号的时刻的时间Ts2; 由所述CPE接收由所述CO发送的第二符号，并获得指示接收到所述第二符号的时刻的时间Ts1; 通过CPE获得表示由CO接收到第一符号的时刻的时间Tm2和表示CO发送第二符号的时刻的时间Tm1; CPE根据Ts1，Ts2，Tm1，Tm2和CPE的延迟来计算CPE的时钟与CO的时钟之间的偏移; 并且CPE根据偏移量调整CPE的时钟以实现同步。 根据本发明，通过调整CPE的时钟时间和CO的时钟时间，可以精确地获得CPE的时钟与CO的时钟之间的偏移量，以有效地实现CPE的时钟之间的时间同步 CPE和CO。

公开(公告)号：US08886986B2

公开(公告)日：2014-11-11

申请号：US13587646

申请日：2012-08-16

Applicant: Guijin Xu ,  Ruzhou Feng ,  Guozhu Long ,  Jianhua Liu

Inventor： Guijin Xu ,  Ruzhou Feng ,  Guozhu Long ,  Jianhua Liu

IPC: G06F1/12 ,  H04L5/14 ,  H04J1/00 ,  H04J3/08 ,  H04J3/06 ,  H04M11/06

CPC classification number: H04J3/0638 ,  H04M11/062

Abstract: A clock synchronization method, customer premises equipment and a clock synchronization system are provided. The customer premises equipment reads a first time stamp when receiving a first specific position of a first DMT signal sent by central office equipment; reads a second time stamp when sending a second specific position of a second DMT signal; receives a third time stamp and a fourth time stamp that are sent by the central office equipment through a data information channel. The third time stamp is read when the central office equipment sends the first specific position of the first DMT signal, and the fourth time stamp is read when the central office equipment receives the second specific position of the second DMT signal. The customer premises equipment adjusts a clock of the customer premises equipment according to the first, second, third and fourth time stamps.

Abstract translation: 提供了时钟同步方法，客户端设备和时钟同步系统。 当接收到由中心局设备发送的第一DMT信号的第一特定位置时，客户驻地设备读取第一时间戳; 当发送第二DMT信号的第二特定位置时读取第二时间戳; 接收由中心局设备通过数据信息通道发送的第三时间戳和第四时间戳。 当中央办公室设备发送第一DMT信号的第一特定位置时，读取第三时间戳，并且当中心局设备接收到第二DMT信号的第二特定位置时，读取第四时间戳。 客户端设备根据第一，第二，第三和第四时间戳来调整客户驻地设备的时钟。

公开(公告)号：US20110274149A1

公开(公告)日：2011-11-10

申请号：US13184276

申请日：2011-07-15

Applicant: Guijin Xu ,  Guozhu Long ,  Ruijie Xiao ,  Zhilei Zhao ,  Xuyong Wu ,  Yuchen Jia

Inventor： Guijin Xu ,  Guozhu Long ,  Ruijie Xiao ,  Zhilei Zhao ,  Xuyong Wu ,  Yuchen Jia

IPC: H04L7/04

CPC classification number: H04L7/0041 ,  H04J3/0638 ,  H04M11/062

Abstract: The present invention provides a method, an apparatus, and a system for time synchronization of an xDigital Subscriber Line (xDSL). The method includes: transmitting, by a customer premises equipment (CPE), a first symbol to a central office (CO) equipment, and obtaining time Ts2 indicating the moment that the first symbol is transmitted; receiving, by the CPE, a second symbol transmitted by the CO, and obtaining time Ts1 indicating the moment that the second symbol is received; obtaining, by the CPE obtains time Tm2 indicating the moment that the first symbol is received by the CO and time Tm1 indicating the moment that the second symbol is transmitted by the CO; the CPE calculates an offset between a clock of the CPE and a clock of the CO according to Ts1, Ts2, Tm1, Tm2 and a delay of the CPE; and the CPE adjusts the clock of the CPE according to the offset to achieve synchronization. According to the present invention, by adjusting the time of the clock of the CPE and the time of the clock of the CO, the offset between the clock of the CPE and the clock of the CO can be obtained accurately to effectively achieve time synchronization between the CPE and the CO.

Abstract translation: 本发明提供了一种用于x数字用户线（xDSL）的时间同步的方法，装置和系统。 该方法包括：由客户驻地设备（CPE）向中心局（CO）设备发送第一符号，并获取指示发送第一符号的时刻的时间Ts2; 由所述CPE接收由所述CO发送的第二符号，并获得指示接收到所述第二符号的时刻的时间Ts1; 通过CPE获得表示由CO接收到第一符号的时刻的时间Tm2和表示CO发送第二符号的时刻的时间Tm1; CPE根据Ts1，Ts2，Tm1，Tm2和CPE的延迟来计算CPE的时钟与CO的时钟之间的偏移; 并且CPE根据偏移量调整CPE的时钟以实现同步。 根据本发明，通过调整CPE的时钟时间和CO的时钟时间，可以精确地获得CPE的时钟与CO的时钟之间的偏移量，以有效地实现CPE的时钟之间的时间同步 CPE和CO。

公开(公告)号：US20120311653A1

公开(公告)日：2012-12-06

申请号：US13587646

申请日：2012-08-16

Applicant: Guijin Xu ,  Ruzhou Feng ,  Guozhu Long ,  Jianhua Liu

Inventor： Guijin Xu ,  Ruzhou Feng ,  Guozhu Long ,  Jianhua Liu

IPC: H04N7/173

CPC classification number: H04J3/0638 ,  H04M11/062

Abstract: A clock synchronization method, customer premises equipment and a clock synchronization system are provided. The customer premises equipment reads a first time stamp when receiving a first specific position of a first DMT signal sent by central office equipment; reads a second time stamp when sending a second specific position of a second DMT signal; receives a third time stamp and a fourth time stamp that are sent by the central office equipment through a data information channel. The third time stamp is read when the central office equipment sends the first specific position of the first DMT signal, and the fourth time stamp is read when the central office equipment receives the second specific position of the second DMT signal. The customer premises equipment adjusts a clock of the customer premises equipment according to the first, second, third and fourth time stamps.

Abstract translation: 提供了时钟同步方法，客户端设备和时钟同步系统。 当接收到由中心局设备发送的第一DMT信号的第一特定位置时，客户驻地设备读取第一时间戳; 当发送第二DMT信号的第二特定位置时读取第二时间戳; 接收由中心局设备通过数据信息通道发送的第三时间戳和第四时间戳。 当中央办公设备发送第一DMT信号的第一特定位置时，读取第三时间戳，并且当中心局设备接收到第二DMT信号的第二特定位置时，读取第四时间戳。 客户端设备根据第一，第二，第三和第四时间戳来调整客户驻地设备的时钟。

公开(公告)号：US20110075685A1

公开(公告)日：2011-03-31

申请号：US12895326

申请日：2010-09-30

Applicant: Guijin Xu ,  Guozhu Long ,  Ruzhou Feng

Inventor： Guijin Xu ,  Guozhu Long ,  Ruzhou Feng

IPC: H04J3/06

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：US08670439B2

公开(公告)日：2014-03-11

申请号：US13175697

申请日：2011-07-01

Applicant: Dong Wei ,  Guozhu Long ,  Jianhua Liu ,  Guijin Xu ,  Anni Wu

Inventor： Dong Wei ,  Guozhu Long ,  Jianhua Liu ,  Guijin Xu ,  Anni Wu

IPC: H04W56/00

CPC classification number: H04L7/041 ,  H04J3/0638 ,  H04J3/065 ,  H04J3/0667 ,  H04L27/2656 ,  H04L27/2657 ,  H04L27/2675

Abstract: An apparatus comprising a customer node configured to couple to an access node and to receive via a channel from the access node a time of day (TOD) value and a corresponding sample index (SNUM) value, wherein the TOD value and the SNUM value are used to estimate a second time of day (TOD′) value based on a propagation delay of the channel (L-Delay), and wherein the TOD value and the TOD′ value are used to estimate a second SNUM value (SNUM′) based on L-Delay and a plurality of parameters.

Abstract translation: 一种装置，包括被配置为耦合到接入节点并且经由来自接入节点的信道的时间（TOD）值和对应的采样索引（SNUM）值接收的客户节点，其中，所述TOD值和所述SNUM值是 用于基于通道的传播延迟（L-Delay）来估计第二时间（TOD'）值，并且其中TOD值和TOD'值用于基于第二SNUM值（SNUM'）估计 L-Delay和多个参数。

公开(公告)号：US20120020417A1

公开(公告)日：2012-01-26

申请号：US13175697

申请日：2011-07-01

Applicant: Dong Wei ,  Guozhu Long ,  Jianhua Liu ,  Guijin Xu ,  Anni Wu

Inventor： Dong Wei ,  Guozhu Long ,  Jianhua Liu ,  Guijin Xu ,  Anni Wu

IPC: H04L7/00 ,  H04L27/00

CPC classification number: H04L7/041 ,  H04J3/0638 ,  H04J3/065 ,  H04J3/0667 ,  H04L27/2656 ,  H04L27/2657 ,  H04L27/2675

Abstract: An apparatus comprising a customer node configured to couple to an access node and to receive via a channel from the access node a time of day (TOD) value and a corresponding sample index (SNUM) value, wherein the TOD value and the SNUM value are used to estimate a second time of day (TOD′) value based on a propagation delay of the channel (L-Delay), and wherein the TOD value and the TOD′ value are used to estimate a second SNUM value (SNUM′) based on L-Delay and a plurality of parameters.

Abstract translation: 一种装置，包括被配置为耦合到接入节点并且经由来自接入节点的信道的时间（TOD）值和对应的采样索引（SNUM）值接收的客户节点，其中，所述TOD值和所述SNUM值是 用于基于通道的传播延迟（L-Delay）来估计第二时间（TOD'）值，并且其中TOD值和TOD'值用于基于第二SNUM值（SNUM'）估计 L-Delay和多个参数。

公开(公告)号：US07804940B2

公开(公告)日：2010-09-28

申请号：US11327659

申请日：2006-01-06

Applicant: Ming Huang ,  Guijin Xu

Inventor： Ming Huang ,  Guijin Xu

IPC: H04M1/24 ,  H04M3/08 ,  H04M3/22

CPC classification number: H04M3/306 ,  H04L12/2896 ,  H04L43/50 ,  H04M3/007 ,  H04M3/2209 ,  H04M3/304

Abstract: The present invention provides two subscriber line testing systems, three broadband/narrowband telecommunication systems and a broadband line card. In the subscriber line testing systems of the present invention, a test module is configured in the CO broadband device, reducing the complexity and the cost of the subscriber line testing systems. In the broadband line card provided by the present invention, line capturing relays are configured in the broadband line card so that the LPF card can be designed as a passive device to reduce corresponding costs, thus using this broadband line card helps reduce the complexity of the CO broadband device and the subscriber cost thereof. In the three broadband/narrowband telecommunication systems provided by the present invention, by using the subscriber line testing systems and the broadband line card, the complexity of broadband/narrowband telecommunication systems and subscriber cost thereof are also reduced. In the third broadband/narrowband telecommunication system provided by the present invention, both the broadband line card without line capturing relay and the broadband line card with line capturing relay can be incorporated so that a better compatibility is provided.

Abstract translation: 本发明提供两个用户线路测试系统，三个宽带/窄带电信系统和宽带线路卡。 在本发明的用户线测试系统中，在CO宽带设备中配置测试模块，降低了用户线测试系统的复杂性和成本。 在本发明提供的宽带线路卡中，在宽带线路卡中配置线路捕获中继，使得LPF卡可以被设计为无源设备以降低相应的成本，因此使用该宽带线卡有助于降低 CO宽带设备及其用户成本。 在本发明提供的三个宽带/窄带电信系统中，通过使用用户线路测试系统和宽带线路卡，宽带/窄带电信系统的复杂度和用户成本也降低。 在本发明提供的第三宽带/窄带电信系统中，可以并入具有线路捕获中继的宽带线路卡和具有线路捕获中继的宽带线路卡，从而提供更好的兼容性。