CN110061794A - A kind of time dissemination system and method - Google Patents
A kind of time dissemination system and method Download PDFInfo
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- CN110061794A CN110061794A CN201810053273.0A CN201810053273A CN110061794A CN 110061794 A CN110061794 A CN 110061794A CN 201810053273 A CN201810053273 A CN 201810053273A CN 110061794 A CN110061794 A CN 110061794A
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- G—PHYSICS
- G04—HOROLOGY
- G04G—ELECTRONIC TIME-PIECES
- G04G5/00—Setting, i.e. correcting or changing, the time-indication
-
- G—PHYSICS
- G04—HOROLOGY
- G04G—ELECTRONIC TIME-PIECES
- G04G7/00—Synchronisation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/06—Synchronising arrangements
- H04J3/0635—Clock or time synchronisation in a network
- H04J3/0638—Clock or time synchronisation among nodes; Internode synchronisation
- H04J3/0644—External master-clock
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/06—Synchronising arrangements
- H04J3/0635—Clock or time synchronisation in a network
- H04J3/0638—Clock or time synchronisation among nodes; Internode synchronisation
- H04J3/0652—Synchronisation among time division multiple access [TDMA] nodes, e.g. time triggered protocol [TTP]
- H04J3/0655—Synchronisation among time division multiple access [TDMA] nodes, e.g. time triggered protocol [TTP] using timestamps
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L7/00—Arrangements for synchronising receiver with transmitter
- H04L7/02—Speed or phase control by the received code signals, the signals containing no special synchronisation information
- H04L7/033—Speed or phase control by the received code signals, the signals containing no special synchronisation information using the transitions of the received signal to control the phase of the synchronising-signal-generating means, e.g. using a phase-locked loop
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L7/00—Arrangements for synchronising receiver with transmitter
- H04L7/02—Speed or phase control by the received code signals, the signals containing no special synchronisation information
- H04L7/033—Speed or phase control by the received code signals, the signals containing no special synchronisation information using the transitions of the received signal to control the phase of the synchronising-signal-generating means, e.g. using a phase-locked loop
- H04L7/0337—Selecting between two or more discretely delayed clocks or selecting between two or more discretely delayed received code signals
- H04L7/0338—Selecting between two or more discretely delayed clocks or selecting between two or more discretely delayed received code signals the correction of the phase error being performed by a feed forward loop
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Electric Clocks (AREA)
- Synchronisation In Digital Transmission Systems (AREA)
Abstract
Embodiment of the present invention is related to art communication systems field, more particularly to a kind of time dissemination system and method.The time dissemination system includes: antenna；The receiver that adjacent antennas is arranged and connects, receiver obtains standard time service information by antenna, and standard time service information is converted to digital dock and is transmitted with reference to source information；Local time service device connected to the receiver, local time service device provide the clock information of standard with reference to source information for receiving digital dock with reference to source information, and according to digital dock for extraneous communication system.Since antenna and receiver are disposed adjacent, and standard time service information is converted to after digital dock refers to source information and is transmitted again by receiver, so the transmission path between antenna and receiver is very short, avoid longer coaxial cable bring time service deviation, and standard time service information is converted into digital dock and is transmitted with reference to source information, greatly improve time service precision.
Description
Technical field
Embodiment of the present invention is related to art communication systems field, more particularly to a kind of time dissemination system and method.
Background technique
With the fast development of science and technology and national economy, various electronic equipments are widely used.Clock is packet
The heart for including all electronic equipments including communication apparatus, due to the transmitting of information in communication field be by frequency division multiplexing and when
Multiplexing technology is divided to realize, therefore either for efficiency of transmission or transmission quality, the accuracy indices of timing
It is all vital, once clock index is undesirable, communication apparatus is gently then abnormal, heavy then paralyse.
Referring to Fig. 1, Fig. 1 is the timing scheme in the prior art based on GNSS satellite positioning system, which is adopted
Timing reference input is obtained with GNSS antenna and GNSS receiver, is connected between GNSS antenna and GNSS receiver by coaxial cable
It connects, wherein timing reference input includes that (Time of Day, standard are current by 1PPS (Pulse Per Second, pulse per second (PPS)) and TOD
Moment), the timing reference input that GNSS receiver is got can not directly meet the application of communication system, therefore can pass through first
Phase-locked loop circuit carries out taming, and the clock after taming is supplied to the modules of communication system by clock distribution module.
Referring to Fig. 2, Fig. 2 is the application scenarios of the time dissemination system based on GNSS in the prior art, it is generally the case that protect
It demonstrate,proves the normal work of GNSS satellite positioning system and guarantees the more preferable performance of timing reference input, the position that GNSS antenna is placed needs
Guarantee that 2/3rds sky is visible, in the close quarters of urban architecture, the roof of high building just becomes more satisfactory
GNSS antenna installation site.And in order to guarantee the reliable working environment of time service equipment or communication equipment, these equipment are logical
It often places indoors.Under this application scenarios, it is necessary to coaxial cable realizes the connection of GNSS antenna and local time dissemination system,
The length of coaxial cable can achieve tens meters.
In the implementation of the present invention, following problems exist in the prior art: existing in the present inventor
In technology, 4G and the pervious wireless communication system of 4G require all to be us grades for the synchronous of clock phase, as long as when this landlord
Clock time service less than 100ns or 50ns can meet demand, but the time service demand for being conceived to 5G communication system is up to ns
Grade, and at present due to all being connected by longer coaxial cable between antenna and receiver, the delay in coaxial cable is to local
The precision of clock time service affects greatly, and therefore, therefore is capable of providing a kind of time dissemination system to meet higher time service precision
It is particularly necessary.
Summary of the invention
Embodiment of the present invention is mainly solving the technical problems that provide a kind of time dissemination system and method, day in the system
It is disposed adjacent between line and receiver, avoids and connected between antenna and receiver by longer coaxial cable in the prior art
And generate biggish time service deviation.
In a first aspect, in order to solve the above technical problems, the technical solution that embodiment of the present invention uses is: providing one
Kind time dissemination system, comprising:
Antenna；
Receiver is arranged adjacent to the antenna, and connect with the antenna, and the receiver is obtained by the antenna
Standard time service information, and the standard time service information is converted into digital dock and is transmitted with reference to source information；
Local time service device is connect with the receiver, and the local time service device is for receiving the digital dock
The clock information of standard is provided for extraneous communication system with reference to source information with reference to source information, and according to the digital dock.
Optionally, the digital dock includes pulse per second (PPS) and standard current time with reference to source packet.
Optionally, the local time service device includes measurement compensating module and phase-locked loop circuit, the measurement compensating module
Connect with the receiver, the measurement compensating module for receiving the digital dock with reference to source information, and, according to from institute
The time difference needed for receiver is transmitted to the local time service device is stated to pulse per second (PPS) progress time bias；
The phase-locked loop circuit is connect with the measurement compensating module, and the phase-locked loop circuit is mended for receiving by the time
The pulse per second (PPS) after repaying, and by the pulse per second (PPS) after time bias carry out it is taming and after being tamed first when
Clock.
Optionally, it is described from the receiver be transmitted to the local time service device needed for the time difference are as follows: the measurement
Compensating module records the first reception for receiving first pulse when receiving the first pulse that the receiver is sent out
Moment, and according to first pulse, the first sending instant that the receiver sends out first pulse is obtained, by institute
Stating for first time of reception subtracts what first sending instant obtained.
Optionally, from the receiver be transmitted to the local time service device needed for the time difference are as follows: the measurement compensates
Module is obtained from the receiver, wherein and the receiver is used for the second pulse sent to measurement compensating module, and
Record sends the second sending instant of second pulse, and the measurement compensating module is in receive that the receiver sends the
When two pulses, reflection or loopback directly are received to the receiver of the second pulse described in the receiver reflectance perhaps loopback
Second pulse, and recorded for second time of reception, and second time of reception subtracted into second sending instant
Difference again divided by two, obtain the time difference.
Optionally, the local time service device further includes clock distribution module, respectively with the measurement compensating module and
The phase-locked loop circuit connection, the clock distribution module are used to receive the standard sent out from the measurement compensating module
Current time, and first clock after taming sent out from the phase-locked loop circuit is received, and, according to reception
To the standard current time and through taming after first clock be the external world communication system the clock of standard is provided
Information.
Optionally, the antenna includes GNSS antenna.
Optionally, the receiver includes GNSS receiver.
Optionally, the connection relationship between the receiver and the local time service device includes optical fiber connection.
Second aspect, in order to solve the above technical problems, another technical solution that embodiment of the present invention uses is: providing
A kind of time service method is applied to system as described above, which comprises
Acquisition standard time service information, and the standard time service information is converted into digital dock and is passed with reference to source information
Defeated, the digital dock includes pulse per second (PPS) and standard current time with reference to source packet；
Measurement digital signal from the receiver be transmitted to the local time service device needed for the time difference；
Time bias is carried out to the pulse per second (PPS) according to the time difference；
First clock taming and after being tamed is carried out to the pulse per second (PPS) after time bias；
The standard current time and first clock after taming are exported, thus for extraneous communication
The clock information of system offer standard.
The beneficial effect of embodiment of the present invention is: being in contrast to the prior art, in embodiments of the present invention, awards
When system include: antenna；Receiver is arranged adjacent to the antenna, and connect with the antenna, and the receiver passes through described
Antenna obtains standard time service information, and the standard time service information is converted to digital dock and is transmitted with reference to source information；This
Ground time service device is connect with the receiver, and the local time service device refers to source information for receiving the digital dock,
And the clock information of standard is provided for extraneous communication system with reference to source information according to the digital dock.The present invention is real as a result,
The antenna and receiver applied in the time dissemination system of mode are disposed adjacent, and the receiver is converted to the standard time service information
Digital dock is transmitted again after referring to source information, so, the transmission path between antenna and receiver is very short, so as to avoid
The biggish time service deviation of longer coaxial cable bring in the prior art, and when the standard time service information is converted to number
It is transmitted again after clock reference source information, greatly improves time service precision.
Detailed description of the invention
One or more embodiments are illustrated by the picture in corresponding attached drawing, these are exemplary
Illustrate not constitute the restriction to embodiment, the element in attached drawing with same reference numbers label is expressed as similar member
Part, unless there are special statement, composition does not limit the figure in attached drawing.
Fig. 1 is the timing scheme in the prior art based on GNSS satellite positioning system；
Fig. 2 is the application scenarios of the time dissemination system based on GNSS in the prior art；
Fig. 3 is the structural block diagram of time dissemination system embodiment of the present invention；
Fig. 4 is the schematic diagram for measuring acquisition time difference in time dissemination system embodiment of the present invention by one-way delay；
Fig. 5 is in time dissemination system embodiment of the present invention by the schematic diagram of two-way Time delay measurement acquisition time difference；
Fig. 6 is the test result about the time service precision of general timing scheme in the prior art；
Fig. 7 is the test result about the time service precision of time dissemination system in time dissemination system embodiment of the present invention；
Fig. 8 is the flow chart of time service method embodiment of the present invention.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with drawings and the embodiments,
The present invention will be described in further detail.It should be appreciated that the specific embodiments described herein are only to explain the present invention,
It is not intended to limit the present invention.
Referring to Fig. 3, the time dissemination system 100 of embodiment of the present invention includes: antenna 10, receiver 20 and local time service dress
Set 30；
Wherein, 20 adjacent antennas 10 of receiver is arranged, and connect with antenna 10, i.e., receiver 20 is arranged in 10 side of antenna,
Thus the signal transmission between receiver 20 and antenna 10 is similar to zero-lag, zero attenuation, so as to avoid path delay and signal
The deterioration for the bring time service performance that decays, ideally reaches the optimality of 20 time service of receiver in 10 mounting condition of antenna
Can, for example time service precision is up to 15ns, so the precision of time service is optimized, in addition, because between antenna 10 and receiver 20
Transmission path is very short, to also guarantee that antenna 10 can be mounted on spacious position.Specifically, receiver 20 is obtained by antenna 10
Standard time service information is taken, and standard time service information is converted into digital dock and is transmitted with reference to source information.
Optionally, digital dock includes 1PPS (1Pulse Per Second, pulse per second (PPS)) and TOD (Time with reference to source packet
Of Day, standard current time).Optionally, antenna 10 includes GNSS antenna, and receiver 20 includes GNSS receiver, the present invention
Time dissemination system may be based on the time dissemination system of GNSS satellite positioning system, wherein receiver 20 passes through the mark that antenna 10 obtains
Quasi- time service information derives from GNSS satellite positioning system, and receiver 20 obtains the satellite of GNSS satellite positioning system by antenna 10
Information, then standard time service information is obtained from satellite information.
Local time service device 30 is connect with receiver 20, and local time service device 30 is for receiving digital dock reference source letter
Breath, and the clock information of standard is provided for extraneous communication system with reference to source information according to digital dock.Optionally, receiver 20
Connection relationship between local time service device 30 includes that optical fiber is connect, and substantially increases the distance of time signal transmission, optical fiber
Transmission can reach tens kilometers of transmission range, so that it is guaranteed that the installation of antenna 10 and receiver 20 is more ideal, more free,
User can arbitrarily choose the ideal position of day empty condition according to demand and install, especially in the compact district of urban architecture,
Installation will be more flexible.Optionally, the connection relationship between receiver 20 and local time service device 30 includes cable connection.
Further, due to digital dock, with reference to transmission of the source information in optical fiber or other transmission mediums, there is also roads
Diameter delay, in order to compensate for the path delay between receiver 20 and local time service device 30, so that time dissemination system 100 realizes
The time service of higher precision, therefore, the local time service device 30 of time dissemination system 100 includes measurement compensation mould in embodiment of the present invention
Block 31, measurement compensating module 31 are connect with receiver 20, and measurement compensating module 31 refers to source information for receiving digital dock, with
And the time difference according to needed for being transmitted to local time service device 30 from receiver 20 carries out time bias to pulse per second (PPS).
Optionally, in some embodiments, receiver 20 is obtained by using the mode for beating timestamp is transmitted to this
Time difference needed for ground time service device 30, wherein time difference, that is, path delay time span, local time service device 30 is by prolonging
When measurement acquisition time it is poor.Further referring to Fig. 4, specifically, being transmitted to needed for local time service device 30 from receiver 20
Time difference are as follows: measurement compensating module 31 is recorded when receiving the first pulse that receiver 20 is sent out receives the first pulse
First time of reception, and according to the first pulse, the first sending instant that receiver 20 sends out the first pulse is obtained, by first
The time of reception subtracts what the first sending instant obtained.This process is one-way delay measurement, and the following are the public affairs of one-way delay measurement
Formula:
Td=t2-t1；
Wherein, TdTime difference needed for being transmitted to local time service device 30 for receiver 20, t2For first time of reception, t1
For the first sending instant.
Optionally, in some embodiments, the transmission of receiver 20 is obtained by using loopback or the mode of reflection
To the time difference needed for local time service device 30, local time service device 30 is poor by Time delay measurement acquisition time.Please further join
Read Fig. 5, specifically, from receiver 20 be transmitted to local time service device 30 needed for the time difference are as follows: measurement compensating module 31 is from connecing
What receipts machine 20 obtained, wherein receiver 20 is used for the second pulse sent to measurement compensating module 31, and records transmission the
Second sending instant of two pulses, measurement compensating module 31 is when receiving the second pulse of the transmission of receiver 20, directly to connecing
Perhaps the reception of the second pulse of loopback receiver 20 reflects or the second pulse of loopback the reflection of receipts machine 20, and records second
The time of reception, and the difference that second time of reception was subtracted the second sending instant obtain the time difference again divided by two.This process is
Two-way Time delay measurement, the following are the formula of the two-way Time delay measurement:
Td=(t4-t3)/2；
Wherein, TdTime difference needed for being transmitted to local time service device 30 for receiver 20, t4For second time of reception, t3
For the second sending instant.
It should be understood that the measuring technique of digital data transmission can achieve the measurement of tens ps precision at present, thus
The accurate compensation of delayed digital signal is realized, so that the time service precision of local time service device 30 greatly improves；Further, since double
Into Time delay measurement mode, second time of reception and the second sending instant are obtained by the clock reference system of the same side, and in list
Into Time delay measurement mode, first time of reception and the first sending instant are obtained by two not ipsilateral clock reference systems respectively,
So the time difference that two-way Time delay measurement mode obtains will be more accurate compared to above-mentioned one-way delay measurement method.
Further, since the digital dock that receiver 20 is got can not directly meet extraneous lead to reference to source information
Believe systematic difference, therefore, it is necessary to first digital dock to carry out taming, the pulse per second (PPS) ability after taming with reference to the pulse per second (PPS) in source information
The modules of extraneous communication system can be supplied to.So the local time service of time dissemination system 100 fills in embodiment of the present invention
Setting 30 further includes phase-locked loop circuit 32, and phase-locked loop circuit 32 is connect with measurement compensating module 31, and phase-locked loop circuit 32 is for receiving
Pulse per second (PPS) after time bias, and by the pulse per second (PPS) after time bias carry out it is taming and after being tamed first when
Clock, the first clock are obtained by taming pulse per second (PPS)；Certainly, in some other embodiment, when measurement compensating module 31
When calculating the time difference, phase-locked loop circuit 32 can also be transferred to carry out time bias and obtain the pulse per second (PPS) after time bias, locked
Pulse per second (PPS) after time bias is carried out the first clock taming and after being tamed again by phase loop circuit 32.
Further, local time service device 30 further includes clock distribution module 33, clock distribution module 33 respectively with measurement
Compensating module 31 and phase-locked loop circuit 32 connect, and clock distribution module 33 is used to receive the mark sent out from measurement compensating module 31
Quasi- current time, and the first clock after taming sent out from phase-locked loop circuit 32 is received, and, according to what is received
Standard current time and the first clock after taming provide the clock information of standard for extraneous communication system.
It is worth noting that: please refer to the following table 1 and Fig. 6 and Fig. 7, wherein table 1 is present various wireless communication systems
The synchronisation requirement of clock；Fig. 6 is the test result about the time service precision of general timing scheme in the prior art；Fig. 7 be about
The test result of the time service precision of time dissemination system 100 in embodiment of the present invention.Synchronous from 1 wireless communication system clock of table needs
It can be seen that, 4G (LTE FDD) and the pervious wireless communication system of 4G require all to be us grades for the synchronous of clock phase in asking,
In this applications, local master clock time service less than 100ns or 50ns can meet demand, but be conceived to 5G communication system
The time service demand of ns grades of system, industry have been increased to 30ns even 20ns for the phase time service demand of local master clock.It please tie
Fig. 6 and Fig. 7 is closed, the time service precision of general time dissemination system is +/- 80ns in the prior art, and time service in embodiment of the present invention
The time service precision of system 100 can achieve about +/- 20ns, so time dissemination system 100 greatly promotes in embodiment of the present invention
Time service precision.
Table 1
In embodiments of the present invention, time dissemination system 100 includes: antenna 10；Receiver 20, adjacent antennas 10 are arranged,
And connect with antenna 10, receiver 20 obtains simulation clock reference source information by antenna 10, and will simulation timing reference input letter
Breath is converted to digital dock and is transmitted with reference to source information；Local time service device 30, connect with receiver 20, local time service dress
30 are set for receiving digital dock with reference to source information, and provides mark with reference to source information according to digital dock for extraneous communication system
Quasi- clock information.The antenna 10 in the time dissemination system of embodiment of the present invention and receiver 20 are disposed adjacent as a result, and are received
Machine 20 will simulate clock reference source information and be converted to digital dock with reference to being transmitted after source information again, so, it antenna 10 and connects
Transmission path between receipts machine 20 is very short, so as to avoid the biggish time service deviation of longer coaxial cable bring, and by mould
Quasi- clock reference source information is converted to digital dock with reference to being transmitted again after source information, improves time service precision.In addition, time service
System 100 further includes measurement compensating module 31, and measurement compensating module 31 refers to source information for receiving digital dock, and, root
Time bias is carried out to pulse per second (PPS) according to the time difference needed for being transmitted to local time service device 30 from receiver 20, greatly improves this
The time service precision of ground time service device 30.
Referring to Fig. 8, another embodiment provided by the invention is: a kind of time service method, applied to awarding as described above
When system 100, this method comprises:
Step 101: obtaining simulation clock reference source information, and simulation clock reference source information is converted into digital dock ginseng
It examines source information to be transmitted, digital dock includes pulse per second (PPS) and standard current time with reference to source packet；
Wherein, in conjunction with time dissemination system 100 as above, by receiver 20 and antenna 10 from global position system in this step
Clock reference source information is simulated in middle acquisition, then clock reference source information is transmitted by way of digital signal, optionally,
Antenna 10 includes GNSS antenna, and receiver 20 includes GNSS receiver, and it is fixed that time dissemination system of the invention may be based on GNSS satellite
The time dissemination system of position system, wherein receiver 20 is defended by the simulation clock reference source information that antenna 10 obtains from GNSS
Star positioning system.
Step 102: measurement digital signal from receiver 20 be transmitted to local time service device 30 needed for the time difference；
Wherein, digital signal can be above-mentioned digital dock with reference to source information, be also possible to preset test pulse.
Specifically, the mode of time of measuring difference can be any one in following two mode in this step:
First way: receiver 20 is obtained by using the mode for beating timestamp and is transmitted to local 30 institute of time service device
The time difference needed, time difference, that is, path delay time span.It is specific optional, local time service device is transmitted to from receiver 20
Time difference needed for 30 are as follows: measurement compensating module 31 is recorded when receiving the first pulse that receiver 20 is sent out receives the
First time of reception of one pulse, and according to the first pulse, when acquisition receiver 20 sends out the first transmission of the first pulse
It carves, first time of reception was subtracted what the first sending instant obtained.This process is one-way delay measurement, and the following are the one-way delay
The formula of measurement:
Td=t2-t1；
Wherein, TdTime difference needed for being transmitted to local time service device 30 for receiver 20, t2For first time of reception, t1
For the first sending instant.
The second way: receiver 20 is obtained by using loopback or the mode of reflection and is transmitted to local time service device
Time difference needed for 30.It is specific optional, from receiver 20 be transmitted to local time service device 30 needed for the time difference are as follows: measurement is mended
Repay what module 31 was obtained from receiver 20, wherein receiver 20 is used for the second pulse sent to measurement compensating module 31, and
And record sends the second sending instant of the second pulse, measurement compensating module 31 is in the second pulse for receiving the transmission of receiver 20
When, directly to the reflection of receiver 20, perhaps the reception of the second pulse of loopback receiver 20 is reflected or the second pulse of loopback,
And recorded for second time of reception, and the difference that second time of reception was subtracted the second sending instant obtains the time again divided by two
Difference.This process is two-way Time delay measurement, and the following are the formula of the two-way Time delay measurement:
Td=(t4-t3)/2；
Wherein, TdTime difference needed for being transmitted to local time service device 30 for receiver 20, t4For second time of reception, t3
For the second sending instant.
Step 103: time bias is carried out to pulse per second (PPS) according to the time difference；
The time difference measured according to previous step 102 carries out time bias to the pulse per second (PPS) in clock reference source information.
Step 104: the first clock taming and after being tamed is carried out to the pulse per second (PPS) after time bias；
Wherein, the first clock is obtained by taming pulse per second (PPS).
Step 105: standard current time and the first clock after taming being exported, thus for extraneous communication
The clock information of system offer standard.
It should be understood that the embodiment of this method and the embodiment of above system are based on identical invention structure
Think, therefore, the particular content of the embodiment of this method can also be referring to the particular content of the embodiment of above system, herein
It does not repeat one by one.
In embodiments of the present invention, time service method includes: to obtain simulation clock reference source information, and simulation clock is joined
It examines source information and is converted to digital dock and transmitted with reference to source information, digital dock includes pulse per second (PPS) with reference to source packet and standard is worked as
The preceding moment；Measurement digital signal from receiver 20 be transmitted to local time service device 30 needed for the time difference；According to the time difference to the second
Pulse carries out time bias；First clock taming and after being tamed is carried out to the pulse per second (PPS) after time bias；It will mark
Quasi- current time and the first clock after taming are exported, to provide the clock letter of standard for extraneous communication system
Breath.The antenna 10 in the time dissemination system of embodiment of the present invention and receiver 20 are disposed adjacent as a result, and receiver 20 will simulate
Clock reference source information is converted to after digital dock refers to source information and is transmitted again, so, between antenna 10 and receiver 20
Transmission path it is very short, so as to avoid the biggish time service deviation of longer coaxial cable bring, and, will simulation clock ginseng
It examines source information and is converted to digital dock with reference to being transmitted again after source information, improve time service precision.In addition, time dissemination system 100
Further include measurement compensating module 31, measurement compensating module 31 for receiving digital dock with reference to source information, and, according to from reception
Time difference needed for machine 20 is transmitted to local time service device 30 carries out time bias to pulse per second (PPS), greatly improves local time service dress
Set 30 time service precision.
Mode the above is only the implementation of the present invention is not intended to limit the scope of the invention, all to utilize this
Equivalent structure or equivalent flow shift made by description of the invention and accompanying drawing content, it is relevant to be applied directly or indirectly in other
Technical field is included within the scope of the present invention.
Claims (10)
1. a kind of time dissemination system characterized by comprising
Antenna；
Receiver is arranged adjacent to the antenna, and connect with the antenna, and the receiver obtains standard by the antenna
Time service information, and the standard time service information is converted into digital dock and is transmitted with reference to source information；
Local time service device is connect with the receiver, and the local time service device is for receiving the digital dock reference
Source information, and the clock information of standard is provided for extraneous communication system with reference to source information according to the digital dock.
2. time dissemination system according to claim 1, which is characterized in that
The digital dock includes pulse per second (PPS) and standard current time with reference to source packet.
3. time dissemination system according to claim 2, which is characterized in that
The local time service device includes measuring compensating module and phase-locked loop circuit, the measurement compensating module and the receiver
Connection, the measurement compensating module refer to source information for receiving the digital dock, and, it is transmitted according to from the receiver
Time bias is carried out to the pulse per second (PPS) to the time difference needed for the local time service device；
The phase-locked loop circuit is connect with the measurement compensating module, and the phase-locked loop circuit is for receiving after time bias
The pulse per second (PPS), and the pulse per second (PPS) after time bias is subjected to the first clock taming and after being tamed.
4. time dissemination system according to claim 3, which is characterized in that
It is described from the receiver be transmitted to the local time service device needed for the time difference are as follows: the measurement compensating module is connecing
Record receives first time of reception of first pulse when receiving the first pulse that the receiver is sent out, and according to
First pulse obtains the first sending instant that the receiver sends out first pulse, when described first is received
Quarter subtracts what first sending instant obtained.
5. time dissemination system according to claim 3, which is characterized in that
From the receiver be transmitted to the local time service device needed for the time difference are as follows: the measurement compensating module connects from described
Receipts machine obtains, wherein the receiver is used to send the second pulse to the measurement compensating module, and records and send institute
The second sending instant of the second pulse is stated, the measurement compensating module is in second pulse for receiving the receiver transmission
When, directly the described of reflection or loopback is received to the receiver of the second pulse described in the receiver reflectance perhaps loopback
Second pulse, and recorded for second time of reception, and second time of reception is subtracted to the difference of second sending instant
Again divided by two, the time difference is obtained.
6. time dissemination system according to claim 3, which is characterized in that
The local time service device further includes clock distribution module, electric with the measurement compensating module and the phaselocked loop respectively
Road connection, the clock distribution module are used to receive the standard current time sent out from the measurement compensating module, and
First clock after taming sent out from the phase-locked loop circuit is received, and, according to the mark received
Quasi- current time and first clock after taming provide the clock information of standard for extraneous communication system.
7. time dissemination system according to claim 1, which is characterized in that
The antenna includes GNSS antenna.
8. time dissemination system according to claim 7, which is characterized in that
The receiver includes GNSS receiver.
9. time dissemination system according to claim 1, which is characterized in that
Connection relationship between the receiver and the local time service device includes optical fiber connection.
10. a kind of time service method is applied to such as power 1 to 9 described in any item systems of power characterized by comprising
Acquisition standard time service information, and the standard time service information is converted into digital dock and is transmitted with reference to source information, institute
It states digital dock and includes pulse per second (PPS) and standard current time with reference to source packet；
Measurement digital signal from the receiver be transmitted to the local time service device needed for the time difference；
Time bias is carried out to the pulse per second (PPS) according to the time difference；
First clock taming and after being tamed is carried out to the pulse per second (PPS) after time bias；
The standard current time and first clock after taming are exported, thus for extraneous communication system
The clock information of offer standard.
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