WO2016095526A1 - Procédé, appareil et système de service temporel et support de stockage - Google Patents

Procédé, appareil et système de service temporel et support de stockage Download PDF

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Publication number
WO2016095526A1
WO2016095526A1 PCT/CN2015/085080 CN2015085080W WO2016095526A1 WO 2016095526 A1 WO2016095526 A1 WO 2016095526A1 CN 2015085080 W CN2015085080 W CN 2015085080W WO 2016095526 A1 WO2016095526 A1 WO 2016095526A1
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WIPO (PCT)
Prior art keywords
signal
time information
timing
transmitting
1pps
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Application number
PCT/CN2015/085080
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English (en)
Chinese (zh)
Inventor
唐雄
吴安平
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中兴通讯股份有限公司
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Publication of WO2016095526A1 publication Critical patent/WO2016095526A1/fr

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    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C9/00—Electrically-actuated devices for setting the time-indicating means

Definitions

  • the present invention relates to the field of clock synchronization, and in particular, to a timing method, device and system, and storage medium.
  • Wireless base stations are increasingly miniaturized, and many miniaturized wireless base stations do not have the clock synchronization condition for acquiring satellites as reference sources.
  • the prior art provides a network clock synchronization technology and an air interface synchronization technology to solve this problem, but such technologies have high requirements on the network environment, such as air interface synchronization technology, when the network environment is bad. Interlocking between wireless base stations is prone to occur, resulting in problems such as increased clock error.
  • the present invention provides a timing method, device and system, and storage medium.
  • the present invention provides a timing method, in one embodiment, comprising: receiving a clock signal transmitted by a standard clock source; parsing the clock signal to acquire time information; and transmitting time information by the low frequency wireless signal.
  • the step of acquiring the time information by the parsing clock signal in the foregoing embodiment includes: acquiring, tracking, demodulating, synchronizing, and calculating the clock signal to obtain time information.
  • the foregoing embodiment before sending the time information, further includes: The timing range calculates the transmit power and transmits the power transmission time information.
  • the time information in the foregoing embodiment includes a 1PPS signal and a TOD signal
  • the step of transmitting time information by using the low frequency wireless signal includes: grouping the 1PPS signal and the TOD signal into a packet by using a low frequency wireless signal. data pack.
  • the step of transmitting a data packet by using a low frequency wireless signal in the foregoing embodiment includes: using a 1PPS signal as a basic frame, performing frame header alignment and sampling, and transmitting a basic frame according to a frequency of the 1PPS signal; and encapsulating the TOD signal as A data frame that transmits a data frame in the middle of a transmission period of a basic frame.
  • the present invention provides a timing device.
  • the method includes: a receiving module configured to receive a clock signal sent by a standard clock source; a parsing module configured to parse the clock signal to obtain time information; and a sending module configured to pass Low frequency wireless signal transmission time information.
  • the parsing module in the foregoing embodiment is further configured to obtain time information after performing signal capture, tracking, demodulation, synchronization, and calculation on the clock signal.
  • the foregoing embodiment further includes a calculation module configured to calculate transmit power according to a time range, and the sending module is further configured to send time information by using transmit power.
  • the time information in the foregoing embodiment includes a 1PPS signal and a TOD signal
  • the sending module is further configured to form the data packet by using the 1PPS signal and the TOD signal in a message manner, and send the data packet by using the low frequency wireless signal.
  • the sending module in the foregoing embodiment is further configured to use the 1PPS signal as a basic frame, perform frame header alignment and sampling, and send a basic frame according to a frequency of the 1PPS signal; and encapsulate the TOD signal into a data frame in the basic frame.
  • the data frame is sent in the middle of the transmission cycle.
  • the present invention provides a communication system including the timing device provided by the present invention.
  • the present invention provides a storage medium having stored therein a computer program configured to perform the timing method.
  • the solution provided by the invention obtains time information by parsing a clock signal sent by a standard clock source, such as a GPS positioning satellite, and then transmits the time information by using a low-frequency wireless signal, thereby realizing the timing of the miniaturized base station and at the same time due to the low frequency.
  • the wireless signal can penetrate the shielding and attenuation characteristics of the indoor wall, and can realize a wide range of timing for the miniaturized base station including the indoor base station.
  • FIG. 1 is a flowchart of a timing method according to a first embodiment of the present invention
  • FIG. 2 is a schematic diagram of a timing device according to a second embodiment of the present invention.
  • FIG. 3 is a flowchart of a timing method according to a third embodiment of the present invention.
  • FIG. 1 is a flowchart of a timing method according to a first embodiment of the present invention. As shown in FIG. 1, in the embodiment, the timing method provided by the present invention includes the following steps:
  • S101 Receive a clock signal sent by a standard clock source.
  • the standard clock source can be a commonly used GPS timing system, or a timing system such as Beidou or Galileo.
  • the clock signal format of different timing systems may be different, but the clock signal can be completed by using a corresponding receiving antenna (such as a GPS antenna).
  • the time information mainly refers to the current time, frame number and other information
  • S103 Send time information by using a low frequency wireless signal.
  • the step of acquiring the time information by the parsing clock signal in the embodiment shown in FIG. 1 includes: after the clock signal is captured, tracked, demodulated, synchronized, and calculated, Time information.
  • the embodiment shown in FIG. 1 before the sending the time information, further includes: calculating the transmit power according to the time limit range, and transmitting the power transmission time information.
  • the time information in the embodiment shown in FIG. 1 includes a 1PPS signal and a TOD signal
  • the step of transmitting the time information by using the low frequency wireless signal includes: grouping the 1PPS signal and the TOD signal into a packet by using a low frequency. Wireless signal transmission packet.
  • the step of transmitting a data packet by the low frequency wireless signal in the embodiment shown in FIG. 1 includes: using a 1PPS signal as a basic frame, performing frame header alignment and sampling, and transmitting a basic frame according to a frequency of the 1PPS signal; The signal is encapsulated into a data frame, and the data frame is transmitted in the middle of the transmission period of the basic frame.
  • the timing device 2 is a schematic diagram of a timing device according to a second embodiment of the present invention. As shown in FIG. 2, in the embodiment, the timing device 2 includes a receiving module 21, a parsing module 22, and a sending module 23, where
  • the receiving module 21 may be a commonly used GPS antenna or the like, and configured to receive a clock signal sent by a standard clock source;
  • the parsing module 22 is configured to parse the clock signal acquisition time information
  • the sending module 23 is configured to send time information by using a low frequency wireless signal.
  • the parsing module 22 in the embodiment shown in FIG. 2 is further configured to perform time information on signal capture, tracking, demodulation, synchronization, and calculation of the clock signal; and may use a commonly used uBlox GPS receiver, etc. .
  • the timing device 2 provided by the present invention further includes a calculation module 24 configured to calculate the transmission work according to the timing range, and the transmitting module 23 is further configured to transmit the time information at the transmission power.
  • the time information in the above embodiment includes a 1PPS signal and a TOD letter.
  • the transmitting module 23 in the embodiment shown in FIG. 2 is further configured to form a data packet by using a 1PPS signal and a TOD signal in a message manner, and send the data packet through the low frequency wireless signal.
  • the sending module 23 in the foregoing embodiment is further configured to use the 1PPS signal as a basic frame, perform frame header alignment and sampling, and send a basic frame according to the frequency of the 1PPS signal; and encapsulate the TOD signal into a data frame, in the basic The data frame is sent in the middle of the transmission period of the frame.
  • the present invention provides a communication system including the timing device provided by the present invention.
  • a standard clock source is used as a GPS system as an example for description.
  • the timing method provided by the present invention includes the following steps:
  • This embodiment takes the GPS timing commonly used in the industry as an example.
  • the functions of Beidou/Glonass/Galileo are similar, and will not be described again. According to the demand, different satellite receiving and even multiple satellite receiving can be selected to meet the future wireless base station satellite timing. development of;
  • S302 Receive an original clock signal by using a GPS antenna.
  • the original clock signal refers to the signal directly received by the GPS antenna, and there may be interference.
  • the following main indicators can be met: frequency: 1575.42 ⁇ 5MHz, gain: 38 ⁇ 2dB, dielectric antenna gain: 4dBi, noise figure : ⁇ 2.7dB, output standing wave ratio: 2.5max;
  • S303 Perform filtering and noise reduction processing on the original clock signal to obtain a clock signal, and send the signal to the GPS receiver through the GPS RF feed line;
  • the GPS antenna receives the GPS signal and performs processing filtering and noise reduction.
  • the existing processing method is not described in this application;
  • the carrier signal received by the GPS antenna is 1575.42 MHz (L1 band) and 1227.6 MHz (L2 band) through the RF feeder. Transfer to the GPS receiver;
  • the GPS RF feeder refers to the coaxial RF cable used for the transmission of the RF signal from the GPS antenna to the GPS receiver.
  • the length is longer.
  • the 1/4" and 1/2" main feeders are used, the two ends of the main feeder are not required. Jumper connection is used; but when using the 7/8" main feeder, it is necessary to connect the GPS antenna and the lightning arrester on the equipment side with the 1/2" cable as the jumper at both ends of the main feeder. Between the GPS receivers, connect with a semi-soft fine jumper;
  • S304 The GPS receiver extracts the 1PPS signal and the TOD signal
  • the GPS receiver can use the uBlox GPS receiver, which uses ANTARIS SuperSense weak signal tracking technology.
  • the tracking sensitivity exceeds -158dBm with enhanced capture sensitivity, providing high positioning accuracy and dynamic navigation performance at low signal levels.
  • 1PPS is used as a basic frame
  • the frame header is aligned with the 1PPS signal
  • the 1PPS is sampled
  • the basic frame is transmitted according to the frequency of the PP1S
  • the TOD signal is encapsulated into a data frame, in the middle of the basic frame period.
  • the ARM A9 processor can be used to complete the digital processing of this part, mainly performing computational control, completing the framing and de-frameping of the message, message response and exception handling;
  • S306 Calculate the transmit power, and send the packet Packet through the digital intermediate frequency part through the low frequency wireless signal;
  • the Packet is placed in the digital intermediate frequency portion of the wireless signal, modulated, and controls the uplink signal in the digital domain, and can independently control and correct the uplink noise of each stage;
  • the transmitting part amplifies and filters the intermediate frequency signal, and Controlling the transmit power, the power of the power amplifier of the device is related to the coverage, and the bandwidth requirement is not high;
  • the low frequency involved in this application refers to the low frequency band in the radio spectrum.
  • the frequency of 700Mhz and below is likely to be used for wireless communication, and the low spectrum occupies the coverage advantage.
  • the time information is obtained, and the time information is transmitted by using the low-frequency wireless signal, thereby realizing the miniaturization basis.
  • the timing of the station, as well as the low-frequency wireless signal can penetrate the shielding and attenuation characteristics of the indoor wall, can realize a wide range of timing for small-scale base stations including indoor base stations.
  • the embodiment of the invention further describes a storage medium in which a computer program is stored, the computer program being configured to perform the timing method of the foregoing embodiments. .

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
  • Electric Clocks (AREA)
  • Position Fixing By Use Of Radio Waves (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé, un appareil et un système de service temporel. Le procédé comprend les étapes suivantes : recevoir un signal d'horloge envoyé par une source d'horloge standard (S101) ; analyser le signal d'horloge pour acquérir des informations temporelles (S102) ; et envoyer les informations temporelles par l'intermédiaire d'un signal sans fil basse fréquence (S103). Grâce à la mise en œuvre de la présente invention, un signal d'horloge envoyé par une source d'horloge standard telle qu'un satellite GPS est analysé pour obtenir des informations temporelles, puis les informations temporelles sont envoyées grâce à un signal sans fil basse fréquence, de manière à réaliser un service temporel pour une station de base de petite taille. De plus, en raison de la caractéristique selon laquelle le signal sans fil basse fréquence peut pénétrer au travers d'un blindage de mur d'intérieur et s'atténuer, on peut obtenir un service temporel à grande échelle pour la station de base de petite taille, y compris une station de base à l'intérieur.
PCT/CN2015/085080 2014-12-16 2015-07-24 Procédé, appareil et système de service temporel et support de stockage WO2016095526A1 (fr)

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CN201410784508.5 2014-12-16
CN201410784508.5A CN105764132A (zh) 2014-12-16 2014-12-16 授时方法、装置及系统

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CN114706100A (zh) * 2022-06-07 2022-07-05 长沙金维信息技术有限公司 基于北斗rdss的差分数据播发方法
CN114859691A (zh) * 2022-03-25 2022-08-05 北京轩宇信息技术有限公司 一种安全隔离的无线单向授时系统及方法

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CN107425935B (zh) * 2017-05-23 2019-01-11 深圳国人通信股份有限公司 一种实现lte专网基站时间同步的方法
CN114520702A (zh) * 2020-11-18 2022-05-20 中国移动通信有限公司研究院 一种时间同步方法及相关设备

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CN114859691B (zh) * 2022-03-25 2023-12-12 北京轩宇信息技术有限公司 一种安全隔离的无线单向授时系统及方法
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