公开(公告)号：WO2021091048A1

公开(公告)日：2021-05-14

申请号：PCT/KR2020/009929

申请日：2020-07-28

Applicant: 한국과학기술원

Inventor： 강준혁 ,  공진우 ,  김완직

IPC: H04L7/027 ,  H04L7/00 ,  H04L7/08

Abstract: 일 실시예에 따른 동기화 수행 방법 및 장치는 네트워크 상에서 분산된 단말들의 동기 환경에 대한 정보를 획득하고, 동기 환경에 대한 정보를 기초로, 단말들 각각으로부터 수신한 동기 신호에 따라 대상 단말의 클럭 위상을 수정하는 위상 응답 함수의 변수 값들을 조절하며, 위상 응답 함수의 변수 값들에 기초하여 대상 단말의 클럭 위상을 제어함으로써 동기화를 수행한다.

公开(公告)号：WO2019136474A1

公开(公告)日：2019-07-11

申请号：PCT/US2019/012766

申请日：2019-01-08

Applicant: UBICQUIA LLC

Inventor： HUTSON, Bradford, Brian ,  AARON, Ian, B.

IPC: H04L7/00 ,  H04L7/027 ,  H04L29/08 ,  H05B37/02

Abstract: A system to coordinate event data from a plurality of smart sensor devices that are coupled to streetlight fixtures to generate a last known state across the plurality of smart sensor devises. The plurality of smart sensor devices receive a distributed clock that is common among the smart sensor devices. A local clock of each smart sensor device is synchronized to the distributed clock. Each smart sensor device monitors and stores event data in an incident buffer. The stored event data is correlated to the distributed clock. The stored correlated event data is transmitted to a remote server. The remote server aggregates the correlated event data from the plurality of smart sensor devices based on the distributed clock to generate a last known state across the plurality of smart sensor devices.

公开(公告)号：WO2019083948A3

公开(公告)日：2019-05-02

申请号：PCT/US2018/057022

申请日：2018-10-23

Applicant: SKYWAVE NETWORKS LLC

Inventor： BABICH, Kevin

IPC: H04L7/027 ,  H04L7/00 ,  H04L27/12 ,  H04B7/22 ,  H03M1/12 ,  G01S19/24

Abstract: A communication system allows for clock synchronization between a transmitter and a receiver when switching from transmission of an analog signal to transmission of a digital signal. The system uses clock synchronization during transmission of the digital signal, but the clock synchronization may be lost when switching to transmission of an analog signal. A digital clock synchronization is embedded in the analog signal so that the clock synchronization between the transmitter and the receiver may be reestablished upon switching to a digital signal without any delay in transmission of the digital signal.

公开(公告)号：WO2019018081A1

公开(公告)日：2019-01-24

申请号：PCT/US2018/037385

申请日：2018-06-13

Applicant: INTEL CORPORATION

Inventor： SRIVASTAVA, Amit Kumar

IPC: H04L7/027 ,  H04L7/00

Abstract: An apparatus is provided which comprises: a first circuitry to track a spread spectrum of a differential signal according to sampled data; and a second circuitry to adjust phase of a clock according to the spread spectrum, wherein the clock is used for sampling the differential signal.

公开(公告)号：WO2018006800A1

公开(公告)日：2018-01-11

申请号：PCT/CN2017/091711

申请日：2017-07-04

Applicant: 中兴通讯股份有限公司

Inventor： 袁磊 ,  蔡轶 ,  周伟勤

IPC: H04L7/027

CPC classification number: H04L7/027

Abstract: 本发明提供了一种用于QPSK系统的时钟均衡方法、装置及系统，该方法包括：获取QPSK系统的QPSK信号或9QAM信号；根据QPSK系统的频谱效率的不同调整QPSK系统的时钟恢复算法和/或均衡算法。通过本发明，解决了相关技术中不同频谱效率下的最优接收性能的问题，进而提高了在不同频谱效率下的接收性能。

公开(公告)号：WO2017152437A1

公开(公告)日：2017-09-14

申请号：PCT/CN2016/077403

申请日：2016-03-25

Applicant: HONG KONG APPLIED SCIENCE & TECHNOLOGY RESEARCH INSTITUTE COMPANY LIMITED

Inventor： ZHAO, Shaohua ,  NI, Wuxue ,  LUO, Biqiang ,  LI, Li

IPC: H04L7/027

CPC classification number: H04L27/2663 ,  H04L7/04 ,  H04L27/06 ,  H04L27/14 ,  H04L27/2331 ,  H04L27/2671 ,  H04L27/2675

Abstract: Systems and methods which provide training sequence or preamble-based synchronization with respect to non-coherent modulated signals and/or differentially coherent modulated signals are described. Embodiments provide for time synchronization using a technique for mitigating the effect of carrier frequency offset (CFO) with respect to the received signal. Embodiments of the present invention provide for frequency synchronization using a technique for estimating CFO using a constant bias induced with respect to the received signal by CFO. Additionally or alternatively, embodiments of the present invention provide for frequency synchronization using a technique for estimating CFO using phase rotation caused by CFO. The time synchronization and frequency synchronization of embodiments may be performed independently, without requiring the results of one synchronization operation for performing the other synchronization operation.

Abstract translation: 描述了针对非相干调制信号和/或差分相干调制信号提供训练序列或基于前导码的同步的系统和方法。 实施例使用用于减轻载波频率偏移（CFO）相对于接收信号的影响的技术来提供时间同步。 本发明的实施例使用用于使用由CFO引起的关于接收信号的恒定偏差来估计CFO的技术来提供频率同步。 另外地或可选地，本发明的实施例使用用于使用由CFO引起的相位旋转来估计CFO的技术来提供频率同步。 实施例的时间同步和频率同步可以独立执行，而不需要用于执行其他同步操作的一个同步操作的结果。

公开(公告)号：WO2016039592A1

公开(公告)日：2016-03-17

申请号：PCT/KR2015/009603

申请日：2015-09-14

Applicant: 삼성전자 주식회사

Inventor： 박준영 ,  손주호 ,  이대영 ,  이정호

IPC: H04L7/027 ,  H04L25/02

CPC classification number: H04L7/042 ,  H04B1/3888 ,  H04B1/50 ,  H04B7/0413 ,  H04J3/0685 ,  H04L7/06 ,  H04L25/02 ,  H04W56/001 ,  H04W56/0015 ,  H04W56/005

Abstract: 본 발명은 롱 텀 에볼루션(long term evolution: LTE)과 같은 4세대(4th-generation: 4G) 통신 시스템 이후 보다 높은 데이터 전송률을 지원하기 제공될 5세대(5th-generation: 5G) 또는 프리-5G(pre-5G) 통신 시스템에 관련된 것이다. 본 발명은 무선 주파수(radio frequency: RF) 처리 장치에 있어서, 적어도 하나의 안테나와, 상기 적어도 하나의 안테나를 사용하여 기지국과 통신을 수행하는 RF부와, 하나의 인터페이스를 통해 연결되는, 다른 RF 처리 장치로부터 신호가 수신되면, 상기 수신된 신호로부터 상기 기지국과 통신을 위한 무선 신호 및 제어 신호를 구분하여 출력하는 신호 필터부와, 상기 신호 필터부에서 상기 제어 신호가 출력된 경우, 상기 제어 신호로부터 클럭(clock) 신호를 검출하는 클럭 신호 검출부와, 상기 클럭 신호를 기반으로 하는 타이밍에 따라 상기 제어 신호에 따른 동작을 수행하는 제어부를 포함한다.

Abstract translation: 本发明涉及一种第五代（5G）或5G前通信系统，用于支持比诸如长期演进（LTE）的第四代（4G）通信系统的数据传输速率更高的数据传输速率，以及随后的 通讯系统 本发明的射频（RF）处理装置包括：至少一个天线; RF单元，用于通过使用所述至少一个天线来执行与基站的通信; 信号滤波器单元，用于当从通过一个接口连接的另一个RF处理设备接收到信号时，从接收到的信号中分离和输出用于与基站进行通信的无线电信号和控制信号; 时钟信号检测单元，用于当从信号滤波器单元输出控制信号时，从控制信号中检测时钟信号; 以及控制单元，用于根据基于时钟信号的定时执行根据控制信号的操作。

公开(公告)号：WO2016023204A1

公开(公告)日：2016-02-18

申请号：PCT/CN2014/084374

申请日：2014-08-14

Applicant: 华为技术有限公司

Inventor： 张利

IPC: H04B3/54 ,  H04L7/027

CPC classification number: H04B3/54 ,  H04L7/027

Abstract: 本发明实施例提供一种时间同步的方法、装置和系统。该方法包括：CMTS设备从SNI获取数据流，并从包含时间报文和数据报文的数据流中提取出时间报文，再将时间报文通过信令通道、将数据报文通过数据通道发送给CM；其中，信令通道与数据通道的工作频点不同；由于传输时间报文的信令通道具有固定的处理时延，不存在时延抖动，保证了传输的时间报文中时间信息的精度，因此可以在DOCSIS网络中实现精确的时间同步。

公开(公告)号：WO2015196637A1

公开(公告)日：2015-12-30

申请号：PCT/CN2014/088576

申请日：2014-10-14

Applicant: 中兴通讯股份有限公司

Inventor： 肖哲靖

IPC: H04L7/027

CPC classification number: H04L7/027

Abstract: 本发明公开了一种业务时钟透传的方法，所述业务时钟透传的方法包括以下步骤：当存在业务数据需要传送时，对所述业务数据进行过采样，并获取所述业务数据的有效采样点的数量；根据预设算法和获取的有效采样点的数量，计算得到所述业务数据的时钟信息对应的表征数据；将所述表征数据传送至目的设备，以供所述目的设备根据所述表征数据得到所述业务数据的时钟信息。本发明还公开了一种业务时钟透传的装置。本发明实现将透传后时钟跟随被透传时钟的精度精确到Bit，降低了时钟透传之后的抖动，提高了透传后时钟的质量，透传之后的时钟能直接满足实际应用要求，进而降低了时钟同步的成本。

公开(公告)号：WO2013098369A1

公开(公告)日：2013-07-04

申请号：PCT/EP2012/077019

申请日：2012-12-28

Applicant: NOKIA SIEMENS NETWORKS OY

Inventor： CALABRO, Stefano ,  HEBEBRAND, Christina ,  ROSENKRANZ, Werner ,  SPINNLER, Bernhard

IPC: H04L7/027

CPC classification number: H04J14/06 ,  H04B10/61 ,  H04B10/614 ,  H04B10/6165 ,  H04B10/6166 ,  H04L7/027 ,  H04L25/03044 ,  H04L25/03891 ,  H04L27/2662 ,  H04L27/2672 ,  H04L27/2697

Abstract: A received POLMUX signal is rotated by fixed rotation parameters (Rot0, Rot1, Rot2) and the rotated POLMUX signal with optimal signal performance is selected and phase information is derived from both polarities. A pre-filter improves the timing accuracy.

Abstract translation: 接收的POLMUX信号通过固定旋转参数（Rot0，Rot1，Rot2）旋转，选择具有最佳信号性能的旋转POLMUX信号，并从两极性导出相位信息。 预滤波器提高了时序精度。