CN110069011B - BD and GPS-based optical fiber remote centralized time service system and time service method - Google Patents
BD and GPS-based optical fiber remote centralized time service system and time service method Download PDFInfo
- Publication number
- CN110069011B CN110069011B CN201910342329.9A CN201910342329A CN110069011B CN 110069011 B CN110069011 B CN 110069011B CN 201910342329 A CN201910342329 A CN 201910342329A CN 110069011 B CN110069011 B CN 110069011B
- Authority
- CN
- China
- Prior art keywords
- time service
- signal
- gps
- module
- signals
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G04—HOROLOGY
- G04R—RADIO-CONTROLLED TIME-PIECES
- G04R20/00—Setting the time according to the time information carried or implied by the radio signal
- G04R20/02—Setting the time according to the time information carried or implied by the radio signal the radio signal being sent by a satellite, e.g. GPS
Abstract
The invention discloses a BD and GPS-based optical fiber remote centralized time service system and a method, wherein the system comprises at least one satellite antenna, an active time service host and at least one active time service distribution unit, wherein the satellite antenna is connected with the active time service host; the optical fiber remote centralized time service system based on the BD and the GPS is composed of a BD/GPS antenna, a 1+1 main unit and a 1+1 standby unit and a distribution unit, so that the accuracy and the safety of time service of a base station are improved; the photoelectric hybrid cable is adopted for transmission, and at least one kilometer can be transmitted; if the mode of nearby electricity taking is adopted, the optical fiber can be pulled far to 20 kilometers, and the problem that the site selection of a base station is influenced due to the limited transmission distance is fundamentally solved.
Description
Technical Field
The invention belongs to the technical field of mobile communication industry, and particularly relates to a BD and GPS-based optical fiber remote centralized time service system and a time service method.
Background
Time service means that devices in a communication network achieve synchronization between network devices by acquiring a uniform clock source signal, and a satellite-borne clock of a satellite is generally adopted as a clock source in the current mobile communication network. The Global Positioning System (GPS) in the united states and the BeiDou Navigation Satellite System (BDS) in our country have the capability of providing time for a mobile communication network.
At present, most of base stations operated in the network in China use a single GPS satellite-borne clock as a clock source, and a traditional GPS time service antenna is adopted to obtain a clock signal and transmit the clock signal to a base band processing unit (BBU for short) of the base station through a feeder line. The antenna is connected with a receiver on the BBU side of the base station through a radio frequency feeder line, the radio frequency feeder line is thick, poor in flexibility and not prone to bending, signal attenuation is fast, and a line compensation amplifier needs to be added in long-distance transmission. The characteristics of the radio frequency feeder line reduce the flexibility of BBU machine room site selection, and increase the construction difficulty and maintenance cost, as shown in FIG. 1. In addition, the GPS is an important infrastructure for the united states forces to achieve their strategic and tactical intentions, and in a very serious case, once the system is shut down or interfered, the communication system will be paralyzed, and a huge potential safety hazard exists.
Therefore, there is a need to develop a BD/GPS based fiber remote centralized time service system that is both secure and reliable and has reduced cost.
Disclosure of Invention
The invention aims to provide a BD/GPS-based optical fiber remote centralized time service system which is safe and reliable and reduces cost.
In order to solve the technical problems, the invention adopts the technical scheme that: the optical fiber remote centralized time service system based on the BD and the GPS comprises at least one satellite antenna, an active time service host and at least one active time service distribution unit, wherein the satellite antenna is connected with the active time service host, and the active time service host is connected with the active time service distribution unit or/and a baseband processing unit (BBU).
By adopting the technical scheme, the problems of difficult engineering construction and limited transmission distance are effectively solved by adopting an optical fiber remote method, and information output by system equipment is transmitted to a base band processing unit (BBU) in a machine room in an optical fiber remote mode; the optical fiber remote centralized time service system based on the BD and the GPS adopts the photoelectric hybrid cable for transmission, and can transmit one kilometer at least; if the mode of nearby electricity taking is adopted, the optical fiber can be pulled far to 20 kilometers, and the problem that the site selection of a base station is influenced due to the limited transmission distance is fundamentally solved; the optical fiber remote centralized time service system based on the BD and the GPS can be used for simultaneously providing time for sixty-four BBUs at most through equipment cascade, multiple BBU multiplexing antenna feeds are realized, the number of co-located antennas is greatly reduced, and the construction cost and the construction difficulty are reduced; the optical fiber remote centralized time service system based on the BD and the GPS completes the time service work of the BBU of the mobile communication base station by utilizing the second synchronous signal and the time information sent by the Beidou satellite navigation system and the GPS satellite; the system and the method support a plurality of systems/frequency bands simultaneously, improve the time service safety, and also support BBU to select the time service system/frequency band randomly or based on a certain strategy; the intelligent monitoring system can also monitor a plurality of two-in-one antennas, GPS and Beidou signals and dual power supplies, when one antenna or power supply fails, the other antenna or power supply can be intelligently switched, and local alarm is given through an LED indicator lamp and a screen; the system can send an alarm to a network management monitoring system through the dry contact; the system can monitor the GPS and Beidou signal states at the same time, and display related information on a screen of the equipment, so that operation and maintenance personnel can know the signal conditions conveniently; the optical fiber remote centralized time service system based on the BD and the GPS realizes the sharing time service of a plurality of BBUs by adopting two paths of main and standby time service antennas; the system is composed of a BD/GPS time service antenna, a 1+1 main/standby unit and a distribution unit, or adopts networking configuration such as Ethernet and an optical network, and improves the accuracy and the safety of the time service of the base station.
As a preferred technical scheme of the invention, the active time service host comprises a CPU control module I, a shunt input module, an adaptive control amplification filtering and attenuation module, a clock source module, a BD/GPS information source signal decoding module, a shunt output module and a power management module I; the CPU control module I is used for sending control information for controlling hardware setting and information processing to other modules; the shunt input module is used for receiving satellite signals from the satellite antenna; the adaptive control amplification filtering and attenuation module is used for amplifying, filtering or attenuating an input signal so as to accord with the amplitude range of the BD/GPS information source signal decoding module; the clock source module is used for providing a time synchronization signal when the BD/GPS signals can not meet the requirement of a time service information source; the BD/GPS information source signal decoding module is used for demodulating a standard second signal and performing phase locking, and then outputting a signal at least containing a standard clock signal to the shunt output module; the shunt output module is used for copying and coding a multiplexing signal and outputting the signal to the baseband processing unit BBU or the active time service distribution unit; the first power management module is used for converting alternating current into direct current to supply power to equipment. Each active time service host is provided with two BD/GPS dual-mode receiving modules, one BD/GPS dual-mode receiving module stabilizes a clock source module, a closed-loop control time-keeping technology is adopted to tame a constant-temperature crystal oscillator so as to realize a high-precision time-keeping internal time-keeping clock source, and a power supply mode of a dual power supply is adopted, so that the reliability is improved.
As a preferred technical solution of the present invention, the active time service distribution unit includes a CPU control module ii, an input module, a control shunt module, a multi-output module, and a power management module ii, where the CPU control module ii is configured to send control information for controlling hardware setting and information processing to other modules; the input module is used for receiving output signals of a host or a superior distribution unit and comprises two BD/GPS signal input interfaces; the control shunting module is used for amplifying and distributing BD/GPS signals; the multi-path output module comprises eight paths of synchronous signal output interfaces and is used for outputting time service signals to the baseband processing unit BBU or the subordinate distribution unit; and the power management module II is used for converting the alternating current into the direct current to supply power to the equipment.
As a preferred embodiment of the present invention, the first power management module and the second power management module each include two AC/DC conversion devices.
As the preferred technical scheme of the invention, the satellite antenna is a BD/GPS antenna integrating a Beidou satellite navigation system and a global positioning system; the BD/GPS antenna receives time service signals of a Beidou satellite BD and a global positioning satellite GPS; the BD/GPS antenna is connected to the active time service host through a feeder line; the shunt input module comprises two paths of BD/GPS input antenna interfaces and is used for accessing two paths of BD/GPS dual-mode receiving antennas and determining to use a BD or GPS signal as a time service information source according to the quality of the signal. The BD/GPS antenna integrating the Beidou satellite navigation system and the global positioning system is an antenna which receives two signals of the Beidou satellite and the global positioning satellite simultaneously.
As the preferred technical scheme of the invention, the clock source module operates on the order of 10-10 of the high-precision temperature compensation crystal oscillator frequency, so that the output time synchronization signal can still ensure certain accuracy; when the external time reference signal is received and recovered, the clock source with the highest priority is automatically switched to enter a normal state to work, and the switching time is less than 10 mS. The clock source module enables the system to be internally provided with a time keeping unit, and when receiving a BDS or GPS time reference signal, the host is synchronized by an external reference signal; when the external time reference signal cannot be received, the internal clock is timed, and the internal high-precision temperature compensation crystal oscillator operates at the frequency of 10-10 orders of magnitude, so that the output time synchronization signal can still ensure certain accuracy; when the external time reference signal is received and recovered, the clock source with the highest priority is automatically switched to enter a normal state to work, and the switching time is less than 10mS (the switching time refers to the whole process time from the time when the normal external time reference signal is received to the time when the switching is completed and the normal operation is recovered).
As a preferred technical solution of the present invention, the input module is configured to receive an output signal of a host or a superior distribution unit, where the type of the signal includes an SMA radio frequency signal, an RJ45 electrical signal, and an HDMI digital signal; each signal type has two interfaces, a main interface and a standby interface.
As a preferred technical solution of the present invention, the control shunt module includes a power divider and a power amplifier; the power divider is used for dividing input signal energy into eight paths, and the power amplifier is used for compensating attenuation caused by signal splitting; the multi-output module adopts a multi-channel passive low-phase difference uniform shunting technology and can output eight paths of synchronous signals at most.
The invention also aims to solve the technical problem of providing a time service method of the BD/GPS-based optical fiber remote centralized time service system, which is safe, reliable and low in cost.
In order to solve the technical problems, the invention adopts the technical scheme that: the time service method of the BD and GPS based optical fiber remote centralized time service system specifically comprises the following steps:
(1) the BD/GPS antenna sends the received satellite signal to the active time service host;
(2) the active time service host amplifies, filters or attenuates the signal according to the signal quality;
(3) the processed signals are decoded by a decoder to analyze time signals in the processed signals; or keeping the parameter format of the received signal, and directly outputting the signal to the power divider;
(4) the power divider divides the time signal into eight paths of signals at most, and the divided signals pass through the power amplifier to improve the signal intensity;
(5) and the enhanced signal is transmitted to a base band processing unit (BBU) or an active time service distribution unit through an output port of the active time service host via an optical fiber.
As a preferred embodiment of the present invention, the time service method of the remote optical fiber centralized time service system based on BD and GPS further comprises the following steps:
(6) when the active time service distribution unit is arranged in the BD and GPS based fiber remote centralized time service system, the active time service distribution unit distributes the time signals to eight paths of signals at most through the power distributor after receiving the signals transmitted by the active time service host, and the distributed signals pass through the power amplifier to improve the signal intensity;
(7) and the signal of the active time service distribution unit is transmitted to the baseband processing unit BBU through an output port and an optical fiber.
Compared with the prior art, the technical scheme has the beneficial effects that: the optical fiber remote centralized time service system based on the BD and the GPS can be used for simultaneously providing time for sixty-four BBUs at most through equipment cascade, multiple BBU multiplexing antenna feeds are realized, the number of co-located antennas is greatly reduced, and the construction cost and the construction difficulty are reduced; the system and the method support a plurality of systems/frequency bands simultaneously, improve the time service safety, and also support BBU to select the time service system/frequency band randomly or based on a certain strategy; the accuracy and the safety of the time service of the base station are improved.
Drawings
The following further detailed description of embodiments of the invention is made with reference to the accompanying drawings:
FIG. 1 is a schematic diagram of a current GPS satellite time service system;
FIG. 2 is a block diagram of a BD and GPS based remote optical fiber centralized time service system;
FIG. 3 is a schematic diagram of an internal structure and a signal flow direction of an active time service host in a time service method of a remote optical fiber centralized time service system based on BD and GPS;
fig. 4 is a schematic diagram showing an internal structure and a signal flow direction of an active time distribution unit in a time service method of a remote optical fiber centralized time service system based on BD and GPS.
Detailed Description
Example (b): as shown in fig. 2, the BD and GPS based fiber remote centralized time service system includes two BD/GPS antennas, an active time service host and at least one active time service distribution unit, where the BD antenna and the GPS antenna of the beidou satellite navigation system are both connected to the active time service host, and the active time service host is connected to the active time service distribution unit or/and the baseband processing unit BBU; the active time service host comprises a CPU control module I, a shunt input module, an adaptive control amplification filtering and attenuation module, a clock source module, a BD/GPS information source signal decoding module, a shunt output module and a power management module I; the CPU control module I is used for sending control information for controlling hardware setting and information processing to other modules; the shunt input module is used for receiving satellite signals from a satellite antenna; the adaptive control amplification filtering and attenuation module is used for amplifying, filtering or attenuating an input signal so as to accord with the amplitude range of the BD/GPS information source signal decoding module; the clock source module is used for providing a time synchronization signal when the BD/GPS signals can not meet the requirement of a time service information source; the BD/GPS information source signal decoding module is used for demodulating a standard second signal and performing phase locking, and then outputting a signal at least containing a standard clock signal to the shunt output module; the shunt output module is used for copying and coding a multiplexing signal and outputting the signal to the baseband processing unit BBU or the active time service distribution unit; the first power management module is used for converting alternating current into direct current to supply power to equipment. Each active time service host is provided with two BD/GPS dual-mode receiving modules, one BD/GPS dual-mode receiving module stabilizes a clock source module, adopts a closed-loop control time-keeping technology to tame a constant-temperature crystal oscillator so as to realize an internal time-keeping clock source with high precision, and adopts a power supply mode of a dual power supply to improve the reliability; the active time service distribution unit comprises a CPU control module II, an input module, a control shunt module, a multi-path output module and a power management module II, wherein the CPU control module II is used for sending control information for controlling hardware setting and information processing to other modules; the input module is used for receiving output signals of a host or a superior distribution unit and comprises two BD/GPS signal input interfaces; the control shunting module is used for amplifying and distributing BD/GPS signals; the multi-path output module comprises eight paths of synchronous signal output interfaces and is used for outputting time service signals to the baseband processing unit BBU or the subordinate distribution unit; the power management module II is used for converting alternating current into direct current to supply power to equipment; the first power management module and the second power management module both comprise two AC/DC conversion devices; the BD/GPS antenna receives time service signals of a Beidou satellite BD and a global positioning satellite GPS; the BD/GPS antenna is connected to the active time service host through a feeder line; the shunt input module comprises two paths of BD/GPS input antenna interfaces and is used for accessing two paths of BD/GPS dual-mode receiving antennas and determining to use a BD or GPS signal as a time service information source according to the quality of the signal; the clock source module operates on the order of 10-10 of the high-precision temperature compensation crystal oscillator frequency, so that the output time synchronization signal can still ensure certain accuracy; when the external time reference signal is received and recovered, the clock source with the highest priority is automatically switched to enter a normal state to work, and the switching time is less than 10 mS. The clock source module enables the system to be internally provided with a time keeping unit, and when receiving a BDS or GPS time reference signal, the host is synchronized by an external reference signal; when the external time reference signal cannot be received, the internal clock is timed, and the internal high-precision temperature compensation crystal oscillator operates at the frequency of 10-10 orders of magnitude, so that the output time synchronization signal can still ensure certain accuracy; when the external time reference signal is received and recovered, automatically switching to a clock source with the highest priority to enter a normal state to work, wherein the switching time is less than 10mS (the switching time refers to the whole process time from the receiving of the normal external time reference signal to the completion of switching and the recovery of normal operation); the input module is used for receiving output signals of a host or a superior distribution unit, and the types of the signals comprise SMA radio frequency signals, RJ45 electric signals and HDMI digital signals; each signal type has a main interface and a standby interface; the control shunt module comprises a power divider and a power amplifier; the power divider is used for dividing input signal energy into eight paths, and the power amplifier is used for compensating attenuation caused by signal splitting; the multi-output module adopts a multi-channel passive low-phase difference uniform shunting technology and can output eight paths of synchronous signals at most.
By adopting the technical scheme, the problems of difficult engineering construction and limited transmission distance are effectively solved by adopting an optical fiber remote method, and information output by system equipment is transmitted to a base band processing unit (BBU) in a machine room in an optical fiber remote mode; the optical fiber remote centralized time service system based on the BD and the GPS adopts the photoelectric hybrid cable for transmission, and can transmit one kilometer at least; if the mode of nearby electricity taking is adopted, the optical fiber can be pulled far to 20 kilometers, and the problem that the site selection of a base station is influenced due to the limited transmission distance is fundamentally solved; the optical fiber remote centralized time service system based on the BD and the GPS can be used for simultaneously providing time for sixty-four BBUs at most through equipment cascade, multiple BBU multiplexing antenna feeds are realized, the number of co-located antennas is greatly reduced, and the construction cost and the construction difficulty are reduced; the optical fiber remote centralized time service system based on the BD and the GPS completes the time service work of the BBU of the mobile communication base station by utilizing the second synchronous signal and the time information sent by the Beidou satellite navigation system and the GPS satellite; the system and the method support a plurality of systems/frequency bands simultaneously, improve the time service safety, and also support BBU to select the time service system/frequency band randomly or based on a certain strategy; the intelligent monitoring system can also monitor two-in-one BD/GPS antennas, a GPS and Beidou signal and a dual power supply, when one antenna or power supply fails, the other antenna or power supply can be intelligently switched, and local alarm is given through an LED indicator lamp and a screen; the system can send out an alarm to the network management monitoring system through the dry contact; the system can monitor the states of the GPS and the Beidou signals at the same time, and relevant information is displayed on a screen of the equipment, so that operation and maintenance personnel can know the signal conditions conveniently; the optical fiber remote centralized time service system based on the BD and the GPS realizes the sharing time service of a plurality of BBUs by adopting two paths of main and standby BD/GPS time service antennas; the system is composed of a BD/GPS time service antenna, a 1+1 main/standby unit and a distribution unit, or adopts networking configuration such as Ethernet and an optical network, and improves the accuracy and the safety of the time service of the base station.
As shown in fig. 3 to 4, the time service method of the BD and GPS based remote optical fiber centralized time service system specifically includes the following steps:
(1) the BD/GPS antenna sends the received satellite signal to the active time service host;
(2) the active time service host amplifies, filters or attenuates the signal according to the signal quality;
(3) the processed signals are decoded by a decoder to analyze time signals in the processed signals; or keeping the parameter format of the received signal, and directly outputting the signal to the power divider;
(4) the power divider divides the time signal into eight paths of signals at most, and the divided signals pass through the power amplifier to improve the signal intensity;
(5) and the enhanced signal is transmitted to a base band processing unit (BBU) or an active time service distribution unit through an output port of the active time service host via an optical fiber.
(6) When the active time service distribution unit is arranged in the BD and GPS based fiber remote centralized time service system, the active time service distribution unit distributes the time signals to eight paths of signals at most through the power distributor after receiving the signals transmitted by the active time service host, and the distributed signals pass through the power amplifier to improve the signal intensity;
(7) and the signal of the active time service distribution unit is transmitted to the baseband processing unit BBU through an output port and an optical fiber.
While the embodiments of the present invention have been described in detail with reference to the drawings, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Claims (9)
1. An optical fiber remote centralized time service system based on BD and GPS is characterized by comprising at least one satellite antenna, an active time service host and at least one active time service distribution unit, wherein the satellite antenna is connected with the active time service host, and the active time service host is connected with the active time service distribution unit or/and a baseband processing unit BBU; the active time service host comprises a CPU control module I, a shunt input module, an adaptive control amplification filtering and attenuation module, a clock source module, a BD/GPS information source signal decoding module, a shunt output module and a power management module I; the CPU control module I is used for sending control information for controlling hardware setting and information processing to other modules; the shunt input module is used for receiving satellite signals from the satellite antenna; the adaptive control amplification filtering and attenuation module is used for amplifying, filtering or attenuating an input signal so as to accord with the amplitude range of the BD/GPS information source signal decoding module; the clock source module is used for providing a time synchronization signal when the BD/GPS signals can not meet the requirement of a time service information source; the BD/GPS information source signal decoding module is used for demodulating a standard second signal and performing phase locking, and then outputting a signal at least containing a standard clock signal to the shunt output module; the shunt output module is used for copying and coding a multiplexing signal and outputting the signal to the baseband processing unit BBU or the active time service distribution unit; the first power management module is used for converting alternating current into direct current to supply power to equipment.
2. The BD and GPS based optical fiber remote centralized time service system according to claim 1, wherein the active time service distribution unit includes a second CPU control module, an input module, a control shunt module, a multi-output module and a second power management module, the second CPU control module is configured to send control information for controlling hardware setting and information processing to other modules; the input module is used for receiving output signals of a host or a superior distribution unit and comprises two BD/GPS signal input interfaces; the control shunting module is used for amplifying and distributing BD/GPS signals; the multi-path output module comprises eight paths of synchronous signal output interfaces and is used for outputting time service signals to the baseband processing unit BBU or the subordinate distribution unit; and the power management module II is used for converting the alternating current into the direct current to supply power to the equipment.
3. The BD-GPS based fiber remote centralized time service system according to claim 2, wherein the first power management module and the second power management module each include two AC/DC conversion devices.
4. The BD and GPS based fiber remote centralized time service system of claim 2, wherein the satellite antenna is a two-in-one BD/GPS antenna of a Beidou satellite navigation system and a global positioning system; the BD/GPS antenna receives time service signals of a Beidou satellite BD and a global positioning satellite GPS; the BD/GPS antenna is connected to the active time service host through a feeder line; the shunt input module comprises two paths of BD/GPS input antenna interfaces and is used for accessing two paths of BD/GPS dual-mode receiving antennas and determining to use a BD or GPS signal as a time service information source according to the quality of the signal.
5. The BD and GPS based optical fiber remote centralized time service system according to claim 4, wherein the clock source module operates at a high precision temperature compensation crystal oscillator frequency of 10-10 orders of magnitude, so that the output time synchronization signal can still ensure a certain accuracy; when the external time reference signal is received and recovered, the clock source with the highest priority is automatically switched to enter a normal state to work, and the switching time is less than 10 mS.
6. The BD and GPS based optical fiber remote centralized time service system according to claim 4, wherein the input module is used to receive the output signal of the host or the superior distribution unit, and the type of the signal includes SMA radio frequency signal, RJ45 electrical signal, HDMI digital signal; each signal type has two interfaces, a main interface and a standby interface.
7. The BD and GPS based fiber optic remote centralized time service system according to claim 4, wherein the control shunting module comprises a power divider and a power amplifier; the power divider is used for dividing input signal energy into eight paths, and the power amplifier is used for compensating attenuation caused by signal splitting; the multi-output module adopts a multi-channel passive low-phase difference uniform shunting technology and can output eight paths of synchronous signals at most.
8. A time service method of a BD and GPS based fiber remote centralized time service system according to any one of claims 1 to 7, comprising the following steps:
(1) the BD/GPS antenna sends the received satellite signal to the active time service host;
(2) the active time service host amplifies, filters or attenuates the signal according to the signal quality;
(3) the processed signals are decoded by a decoder to analyze time signals in the processed signals; or keeping the parameter format of the received signal, and directly outputting the signal to the power divider;
(4) the power divider divides the time signal into eight paths of signals at most, and the divided signals pass through the power amplifier to improve the signal intensity;
(5) and the enhanced signal is transmitted to a base band processing unit (BBU) or an active time service distribution unit through an output port of the active time service host via an optical fiber.
9. The time service method of the BD-GPS based remote optical fiber centralized time service system according to claim 8, wherein the time service method of the BD-GPS based remote optical fiber centralized time service system further comprises:
(6) when the active time service distribution unit is arranged in the BD and GPS based fiber remote centralized time service system, the active time service distribution unit distributes the time signals to eight paths of signals at most through the power distributor after receiving the signals transmitted by the active time service host, and the distributed signals pass through the power amplifier to improve the signal intensity;
(7) and the signal of the active time service distribution unit is transmitted to the baseband processing unit BBU through an output port and an optical fiber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910342329.9A CN110069011B (en) | 2019-04-26 | 2019-04-26 | BD and GPS-based optical fiber remote centralized time service system and time service method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910342329.9A CN110069011B (en) | 2019-04-26 | 2019-04-26 | BD and GPS-based optical fiber remote centralized time service system and time service method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110069011A CN110069011A (en) | 2019-07-30 |
| CN110069011B true CN110069011B (en) | 2021-03-05 |
Family
ID=67369053
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910342329.9A Active CN110069011B (en) | 2019-04-26 | 2019-04-26 | BD and GPS-based optical fiber remote centralized time service system and time service method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110069011B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4050965A4 (en) * | 2019-11-19 | 2022-10-26 | Huawei Technologies Co., Ltd. | Gnss signal distribution system and gnss base station |
| CN111123297B (en) * | 2019-12-13 | 2022-03-15 | 中航光电科技股份有限公司 | Remote system suitable for Beidou satellite navigation signals |
| CN111123296B (en) * | 2019-12-13 | 2022-03-15 | 中航光电科技股份有限公司 | Remote system suitable for GLONASS satellite navigation signals |
| CN111399003B (en) * | 2020-03-24 | 2022-03-11 | 中航光电科技股份有限公司 | Remote system of full-band satellite navigation signal |
| CN111736182B (en) * | 2020-07-28 | 2020-11-24 | 南京华苏科技有限公司 | Multi-path adjustable BDS/GPS time service device and time service method |
| CN113156464A (en) * | 2021-05-10 | 2021-07-23 | 深圳国人无线通信有限公司 | Synchronous time service conversion device and method |
| CN113885305B (en) * | 2021-09-10 | 2023-04-25 | 中国电波传播研究所（中国电子科技集团公司第二十二研究所） | Completely autonomous controllable rapid time-frequency synchronization device and method |
| CN114900861B (en) * | 2022-06-17 | 2024-04-09 | 中国联合网络通信集团有限公司 | Base station control method, base station and storage medium |
| CN115309031B (en) * | 2022-07-22 | 2023-12-29 | 杭州亿邦博通科技股份有限公司 | Beidou/GPS dual-mode digital high-precision synchronous time service equipment and system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102201851A (en) * | 2010-03-26 | 2011-09-28 | 大唐移动通信设备有限公司 | Remote clock system, equipment and information transmission method |
| CN103516423A (en) * | 2012-06-20 | 2014-01-15 | 中兴通讯股份有限公司 | Method and apparatus used for optical fiber clock remote transmission |
| CN106130681A (en) * | 2016-07-25 | 2016-11-16 | 广州市国飞信息科技有限公司 | High-accuracy clock synchronization method, module, equipment and system for time dissemination system |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201700011U (en) * | 2010-06-24 | 2011-01-05 | 鼎桥通信技术有限公司 | Mobile telecommunication network system |
| US9535155B2 (en) * | 2015-02-04 | 2017-01-03 | Cognitive Systems Corp. | Locating the source of a wireless signal |
| CN204515362U (en) * | 2015-03-16 | 2015-07-29 | 江苏北斗卫星应用产业研究院有限公司 | Beidou II/GPS dual-mode tight coupling time service module |
| CN105307199B (en) * | 2015-09-11 | 2020-02-07 | 北京国泰信通科技有限公司 | GPS/Beidou dual-mode intelligent amplification multi-path distribution system with monitoring function |
-
2019
- 2019-04-26 CN CN201910342329.9A patent/CN110069011B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102201851A (en) * | 2010-03-26 | 2011-09-28 | 大唐移动通信设备有限公司 | Remote clock system, equipment and information transmission method |
| CN103516423A (en) * | 2012-06-20 | 2014-01-15 | 中兴通讯股份有限公司 | Method and apparatus used for optical fiber clock remote transmission |
| CN106130681A (en) * | 2016-07-25 | 2016-11-16 | 广州市国飞信息科技有限公司 | High-accuracy clock synchronization method, module, equipment and system for time dissemination system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110069011A (en) | 2019-07-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110069011B (en) | BD and GPS-based optical fiber remote centralized time service system and time service method | |
| US9717062B2 (en) | Method and apparatus of implementing time synchronization | |
| EP2863557A1 (en) | Data transmitting method, device, and system | |
| CN104137454B (en) | Wireless communication system and radio-frequency device | |
| CN203101856U (en) | Time synchronization system used for electric power communication | |
| CN102682586A (en) | Transmission line state monitoring communication system | |
| CN108791373B (en) | Railway plane shunting system | |
| CN103812593B (en) | High precision distribution type fiber-optic clock synchronization system | |
| CN110808803A (en) | High-reliability and high-performance reference clock system | |
| CN113347699A (en) | Base station optical fiber time service system based on BD/GPS double antennas | |
| CN111061147A (en) | Wireless network-based regional intelligent substation time service system and method | |
| CN111010680B (en) | Indoor distribution system | |
| CN104144432A (en) | GSM-R micro-power optical fiber distributed device | |
| CN102064901B (en) | Method for compensating asymmetric line delay caused by OLP (Optical Line Protection) switching | |
| CN101621842A (en) | MIMO base station system, method and device for correcting time-delay deviation among channels | |
| CN111954298B (en) | Clock synchronization device and system suitable for millimeter wave radio frequency remote module | |
| CN215268739U (en) | Base station optical fiber time service system based on BD/GPS double antennas | |
| CN211528697U (en) | GPS signal passive distribution equipment with monitoring and backup functions | |
| FI77553C (en) | Radio telephone system. | |
| CN113093235A (en) | High-precision time synchronization system and method for devices in tunnel | |
| CN204948081U (en) | A kind of autosynchronous optical fiber radio frequency transmission equipment | |
| CN111106891A (en) | Relative time synchronization method, device and system | |
| CN115309031B (en) | Beidou/GPS dual-mode digital high-precision synchronous time service equipment and system | |
| CN207354626U (en) | A kind of expansion equipment and system at distribution skin station | |
| CN101287079B (en) | Transmission method, system and device for broadcast television signal |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230515 Address after: 210000 No.10, building 39, Suning Yaju, no.258, Baota Road, Chunxi street, Gaochun District, Nanjing City, Jiangsu Province Patentee after: NANJING HOWSO TECHNOLOGY Co.,Ltd. Patentee after: Huasu Shulian Technology Co.,Ltd. Address before: 210000 No.10, building 39, Suning Yaju, no.258, Baota Road, Chunxi street, Gaochun District, Nanjing City, Jiangsu Province Patentee before: NANJING HOWSO TECHNOLOGY Co.,Ltd. |