CN106559157A - A kind of clock synchronizing method, device and communication equipment - Google Patents
A kind of clock synchronizing method, device and communication equipment Download PDFInfo
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- CN106559157A CN106559157A CN201510633536.1A CN201510633536A CN106559157A CN 106559157 A CN106559157 A CN 106559157A CN 201510633536 A CN201510633536 A CN 201510633536A CN 106559157 A CN106559157 A CN 106559157A
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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
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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
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Abstract
The present invention discloses a kind of clock synchronizing method, device and communication equipment, is related to the communications field, to solve the problems, such as in prior art data transmit-receive opposite end clock be synchronously difficult to promote the use of, it is difficult in maintenance.Methods described includes：The software clock initial time of the node for needing to carry out data transmit-receive is determined according to reference clock source；According to the software clock initial time and the rhythm and pace of moving things of data transmit-receive, the software clock current time after data transmit-receive is determined；According to the software clock current time and the time difference of the current time of the reference clock source, the rhythm and pace of moving things of the data transmit-receive is adjusted, so that the absolute value of the time difference is less than predetermined threshold value.
Description
Technical field
The present invention relates to communication technique field, more particularly to a kind of clock synchronizing method, device and communication set
It is standby.
Background technology
It is mobile in GSM/WCDMA/CDMA/TD-SCDMA/WiMax/FDD-LTE/TDD-LTE etc.
In communication network, either base station, base station controller, BBU (Building Baseband Unit, it is indoor
Baseband processing unit) and RRU (Remote Radio Unit, Remote Radio Unit), although have certain
Reception and send caching capabilities, but in order to meet the use feeling of mobile communication network user, or will
Ask Frame there be reasonable promptness.It is therefore desirable to the tick interrupt for being used for transceiving data can moved
Keep synchronously with opposite equip. in dynamic communication network, it is impossible to have big error and cumulative error.
In order to realize clock synchronization, it is common practice to a clock module is realized in each equipment, this when
Clock module and upper level clock enter row clock synchronization, while the clock signal that the clock module is produced is incorporated into
Need and opposite equip. synchronizes the node for sending and receiving Frame, these nodes are in order to processing this
A little clock signals, it is necessary to special hardware designs, and can not using general server, PC or
Virtual machine is realizing.
This design result in the needs such as current base station controller, BBU, RRU and to enter row clock same for opposite end
Each node in the equipment of step is all the specially designed hardware of equipment supplier so that base station controller, BBU
Manufacture, operation and maintenance with the communication apparatus such as RRU is all more difficult.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of clock synchronizing method, device and communication equipment, uses
With solve the problems, such as in prior art data transmit-receive opposite end clock be synchronously difficult to promote the use of, it is difficult in maintenance.
On the one hand, the present invention provides a kind of clock synchronizing method, including：Needs are determined according to reference clock source
Carry out the software clock initial time of the node of data transmit-receive；According to the software clock initial time and number
According to the rhythm and pace of moving things of transmitting-receiving, the software clock current time after data transmit-receive is determined；It is current according to the software clock
Time and the time difference of the current time of the reference clock source, adjust the rhythm and pace of moving things of the data transmit-receive, so that
The absolute value of the time difference is less than predetermined threshold value.
Optionally, it is described according to the software clock initial time and the rhythm and pace of moving things of data transmit-receive, determine data
Software clock current time after transmitting-receiving includes：On the node, the tick interrupt produced by intervalometer
Data transmit-receive is carried out, and is had no progeny in every time, when the timing cycle of the intervalometer is accumulated in the software
On clock initial time, the accumulation result of gained is defined as the software clock after each data transmit-receive it is current when
Between.
Optionally, it is described according to the software clock current time and the current time of the reference clock source
Time difference, adjusts the rhythm and pace of moving things of the data transmit-receive, so that the absolute value of the time difference is less than predetermined threshold value bag
Include：If the software clock current time is less than with the time difference of the current time of the reference clock source
Zero, determine that the software clock is partially slow, increase the number of times of the data transmit-receive；If the software clock is worked as
The front time is more than zero with the time difference of the current time of the reference clock source, determines that the software clock is inclined
Hurry up, reduce the number of times of the data transmit-receive.
Optionally, the data transmit-receive number of times for increasing or decreasing be equal to the time difference absolute value with it is adjacent twice
The ratio of the time interval of data transmit-receive.
Optionally, when determining that the software clock of the node for needing to carry out data transmit-receive is initial according to reference clock source
Between include：If the reference clock source is located at the node for needing to carry out data transmit-receive, determine described soft
Part clock initial time is equal to the time of the reference clock source；If the reference clock source is not in the need
The local clock of the node for needing and carrying out data transmit-receive is synchronized to institute by the node carried out by data transmit-receive
Reference clock source is stated, determines the software clock initial time equal to the local clock after synchronization.
Optionally, the reference clock source includes following at least one：1588 agreements Zhong Yuan；NTP(network
Time protocol, NTP) clock；GPS (Global Positioning System, the whole world
Alignment system) clock source；Higher level's line clock.
On the other hand, the present invention also provides a kind of clock synchronization apparatus, including：Initial time determining unit,
For the software clock initial time for needing the node for carrying out data transmit-receive is determined according to reference clock source；Currently
Time determining unit, for the rhythm and pace of moving things according to the software clock initial time and data transmit-receive, determines number
According to the software clock current time after transmitting-receiving；Adjustment unit, for according to the software clock current time with
The time difference of the current time of the reference clock source, adjusts the rhythm and pace of moving things of the data transmit-receive, so that when described
Between difference absolute value be less than predetermined threshold value.
Optionally, the current time determining unit, specifically for：On the node, by intervalometer
The tick interrupt of generation carries out data transmit-receive, and has no progeny in every time, and the timing cycle of the intervalometer is tired out
It is added on the software clock initial time, the accumulation result of gained is defined as after each data transmit-receive
Software clock current time.
Optionally, the adjustment unit, specifically for：If the software clock current time and the ginseng
The time difference of current time of clock source is examined less than zero, is determined that the software clock is partially slow, is increased the data
The number of times of transmitting-receiving；If the time of the software clock current time and the current time of the reference clock source
More than zero, difference determines that the software clock is fast, reduce the number of times of the data transmit-receive.
Optionally, the data transmit-receive number of times for increasing or decreasing be equal to the time difference absolute value with it is adjacent twice
The ratio of the time interval of data transmit-receive.
Optionally, the initial time determining unit, specifically for：If the reference clock source is located at institute
The node for needing to carry out data transmit-receive is stated, determines that the software clock initial time is equal to the reference clock source
Time；If the reference clock source is not in the node for needing to carry out data transmit-receive, by the needs
The local clock for carrying out the node of data transmit-receive is synchronized to the reference clock source, determines at the beginning of the software clock
Time beginning is equal to the local clock after synchronization.
On the other hand, the present invention also provides a kind of communication equipment, including any one clock that the present invention is provided is same
Step device.
Clock synchronizing method provided in an embodiment of the present invention, device and communication equipment, can be according to reference clock
Source determines the software clock initial time of the node for needing to carry out data transmit-receive, and according at the beginning of the software clock
Time beginning and the rhythm and pace of moving things of data transmit-receive, determine the software clock current time after data transmit-receive；Then basis
The software clock current time and the time difference of the current time of the reference clock source, adjust the data
The rhythm and pace of moving things of transmitting-receiving, so that the absolute value of the time difference is less than predetermined threshold value.So, carrying out data transmit-receive
When, can be according to the rhythm and pace of moving things Dose times of data transmit-receive, as the data transmit-receive rhythm and pace of moving things is by local clock control
, through the accumulation of multiple data transmit-receive, between local clock and reference clock, small error is also gradually accumulated
Tired, the error of accumulation is the time between software clock current time and the current time of reference clock source
Difference.Due to the time measurement of software clock it is relevant with the data transmit-receive rhythm and pace of moving things, by the tune to the data transmit-receive rhythm and pace of moving things
It is whole that software clock current time can be made also accordingly to adjust, so as to above-mentioned time difference is limited in very little all the time
In the range of, make this node and peer node reach the clock synchronization of data transmit-receive.
Description of the drawings
Fig. 1 is a kind of flow chart of clock synchronizing method provided in an embodiment of the present invention；
Fig. 2 is the embodiment of the present invention showing in generic server, PC or virtual on-board maintenance precise time
It is intended to；
Fig. 3 is the schematic diagram that the embodiment of the present invention safeguards precise time on clock module with GPS；
Fig. 4 is embodiment of the present invention schematic diagram with line clock maintenance time on clock module；
Fig. 5 be embodiment of the present invention TimeA and TimeB on same node when TimeB maintenance show
It is intended to；
Fig. 6 be embodiment of the present invention TimeA and TimeB not on same node when TimeB maintenance
Schematic diagram；
Fig. 7 is embodiment of the present invention TimeB and TimeA time synchronized schematic flow sheets；
Fig. 8 is that the embodiment of the present invention adopts 1588 (or NTP), and TimeA and TimeB is not same
Clock synchronization implementation figure when on node；
Fig. 9 is that the embodiment of the present invention adopts 1588 (or NTP), and TimeA and TimeB is same
Clock synchronization implementation figure when on node；
Figure 10 is that the embodiment of the present invention is modified flow chart to the expired times that high-resolution timer is produced；
Figure 11 is when the embodiment of the present invention adopts GPS, TimeA and TimeB not on same node
Clock synchronization implementation figure；
Figure 12 is that the embodiment of the present invention adopts line clock, TimeA and TimeB not on same node
When clock synchronization implementation figure；
Figure 13 is a kind of structural representation of clock synchronization apparatus provided in an embodiment of the present invention.
Specific embodiment
Below in conjunction with accompanying drawing, the present invention is described in detail.It should be appreciated that described herein be embodied as
Example limits the present invention only to explain the present invention, not.
As shown in figure 1, the embodiment of the present invention provides a kind of clock synchronizing method, including：
S11, determines the software clock initial time of the node for needing to carry out data transmit-receive according to reference clock source；
S12, according to the software clock initial time and the rhythm and pace of moving things of data transmit-receive, after determining data transmit-receive
Software clock current time；
S13, according to the time difference of the software clock current time and the current time of the reference clock source,
The rhythm and pace of moving things of the data transmit-receive is adjusted, so that the absolute value of the time difference is less than predetermined threshold value.
Clock synchronizing method provided in an embodiment of the present invention, can be determined according to reference clock source needs into line number
According to the software clock initial time of the node of transmitting-receiving, and received according to the software clock initial time and data
The rhythm and pace of moving things sent out, determines the software clock current time after data transmit-receive；Then it is current according to the software clock
Time and the time difference of the current time of the reference clock source, adjust the rhythm and pace of moving things of the data transmit-receive, so that
The absolute value of the time difference is less than predetermined threshold value.So, when data transmit-receive is carried out, can be according to data
The rhythm and pace of moving things Dose times of transmitting-receiving, as the data transmit-receive rhythm and pace of moving things is controlled by local clock, through many secondary datas
The accumulation of transmitting-receiving, between local clock and reference clock, small error is also gradually accumulated, and the error of accumulation is
For the time difference between software clock current time and the current time of reference clock source.Due to software clock
Time measurement is relevant with the data transmit-receive rhythm and pace of moving things, works as can software clock by the adjustment to the data transmit-receive rhythm and pace of moving things
The front time also accordingly adjusts, so as to above-mentioned time difference is limited in the range of very little all the time, make this node and
Peer node has reached the clock synchronization of data transmit-receive.
In the present embodiment, reference clock source refers to the ratio safeguarded on certain or some node of communication apparatus
More accurate clock, the time of reference clock source is TimeA.For example, as shown in Fig. 2 the present invention's
In one embodiment, can use on generic server, PC or virtual machine 1588slave (or
NTP Client) to outside 1588master (or ntp server) carry out time synchronized mode come
Safeguard precise time TimeA.
As shown in figure 3, in another embodiment of the present invention, in the case where currently clock module is had,
In order to play maximum value by which using used equipment, GPS module can be used on original clock module
Receive the mode of gps time to safeguard precise time TimeA, or by it is as shown in Figure 4 when
Using the synchronous mode of line clock superior clock module safeguarding precise time TimeA in clock module.
Specifically, as an equipment has one or more node, reference clock source may be located at wherein
On one or several nodes, in step s 11, the position of reference clock source is different, during the software of node
Between determination method it is also different.Optionally, in one embodiment of the invention, according to reference clock
Source determines needs the software clock initial time of the node for carrying out data transmit-receive to include：
If the reference clock source is located at the node for needing to carry out data transmit-receive, when determining the software
Clock initial time is equal to the time of the reference clock source；
If the reference clock source in the node for needing to carry out data transmit-receive, the needs is not carried out
The local clock of the node of data transmit-receive is synchronized to the reference clock source, when determining that the software clock is initial
Between be equal to synchronization after the local clock.
As shown in figure 5, the time of reference clock source is designated as TimeA, the time of software clock is TimeB.
When TimeB and TimeA not on same node when, the synchronous method of TimeB and TimeA is as follows：
1. time synchronized client sends time synchronized request to time synchronized service end, contains in request
Current time T1 of TimeB；
2. time synchronized service end receives time synchronized request, records the time T2 of current TimeA；
3. time synchronized service end reads the time T3 of TimeA, and to time synchronized client response, should
T1, T2, T3 are contained in answering；
4. time synchronized client receives the response of time synchronized service end, records the time of current TimeB
T4, and T1, T2, T3 are taken out from response message；
5. the time of chain-circuit time delay delay and TimeB and TimeA is calculated according to T1, T2, T3, T4
Deviation offset, and TimeB is corrected according to result of calculation, the time synchronized with TimeA is reached with this.Meter
Calculation method follows the algorithm in 1588V2 specifications:
A=T2-T1；
B=T4-T3；
After determining software clock initial time, in step s 12, need initial according to the software clock
Time and the rhythm and pace of moving things of data transmit-receive, determine the software clock current time after data transmit-receive.The present invention's
In one embodiment, the determination method of software clock current time may include：
On the node, the tick interrupt produced by intervalometer carries out data transmit-receive, and is interrupting every time
Afterwards, the timing cycle of the intervalometer is accumulated on the software clock initial time, by the tired of gained
Plus result is defined as the software clock current time after each data transmit-receive.
For example, in one embodiment of the invention, synchronize in needs and opposite equip. and send and receive
On the node of Frame, a software clock TimeB is safeguarded by cycle high-resolution timer.According to difference
Standard and needs, the cycle t1 of the high-resolution timer of setting is also different.It is super in high-resolution timer
TimeB is accumulated once t1 by Shi Hou, so as to have updated history maximum of T imeBmax of TimeB.
Software clock is carried out after timing by the rhythm and pace of moving things of the transceiving data in step S12, it is possible to periodically
Time of the ground by the time of software clock with reference clock source is compared, and draws the time difference of the two, and
The data transmit-receive rhythm and pace of moving things is adjusted according to the time difference in step S13, to improve the time difference.
Specifically, in step s 13, according to the software clock current time and the reference clock source
The time difference of current time, adjusts the rhythm and pace of moving things of the data transmit-receive, so that the absolute value of the time difference is less than
Predetermined threshold value may include：
If the software clock current time is less than with the time difference of the current time of the reference clock source
Zero, determine that the software clock is partially slow, increase the number of times of the data transmit-receive；
If the software clock current time is more than with the time difference of the current time of the reference clock source
Zero, determine that the software clock is fast, reduce the number of times of the data transmit-receive.
Optionally, the data transmit-receive number of times for increasing or decreasing be equal to the time difference absolute value with it is adjacent twice
The ratio of the time interval of data transmit-receive.
Illustrate, in one embodiment of the invention, if arrange what is safeguarded on the node of transceiving data
Cycle T=0.1 millisecond of intervalometer, then produce a tick interrupt per 0.1 millisecond, and the node utilizes this
Tick interrupt is synchronized with opposite end, so as to carry out data transmit-receive.But, as the crystal oscillator on the node is deposited
In slight error, after a period of time, slight error gradually can be accumulated, so as to cause the cycle T of intervalometer
Not actually exactly equal to 0.1 millisecond.For example, if the crystal oscillator on node is fast, T possible 0.09
Millisecond, if the crystal oscillator on node is partially slow, T is possible 0.11 millisecond.But during software for calculation clock current time,
It is every time cumulative still according to T=0.1 milliseconds, so caused by as a result, the node fast for crystal oscillator, counts
The software clock current time for calculating will be bigger than normal than reference time, that is, software clock current time and institute
The time difference for stating the current time of reference clock source is more than zero；The node partially slow for crystal oscillator, what is calculated is soft
Part clock current time will be less than normal than reference time, that is, software clock current time with during the reference
The time difference of the current time of Zhong Yuan is less than zero.The node fast for crystal oscillator, in the same time, data
Transmitting-receiving number of times can be on the high side, accordingly, it would be desirable to data transmit-receive number of times is reduced, conversely, the node partially slow for crystal oscillator,
In the same time, data transmit-receive number of times can be on the low side, accordingly, it would be desirable to reduce data transmit-receive number of times.By right
The adjustment of data transmit-receive number of times, the current time of software clock are also just adjusted therewith, so that software clock is worked as
The front time is less than predetermined threshold value with the time difference of the current time of reference clock source.Optionally, the predetermined threshold value
Size can be according to arrange to the different of clock synchronization accuracy demand, predetermined threshold value is less, and synchronization is more smart
Really, but need adjustment number of times it is also more, embodiments of the invention are not limited to this.For example, in the present invention
One embodiment in, in 1 second in the adjustment number of times of data transmit-receive number of times be about 2 to 8 times.
Optionally, according to residing for software clock node difference, software clock TimeB has two kinds of different dimensions
Shield mode, concrete difference is as shown in Figure 6 and Figure 7.
As shown in fig. 6, when TimeA and TimeB is on same node, the maintenance of TimeB can be wrapped
Include following steps：
1. TimeA is read in this node, as the initial value of TimeB；
2. high-resolution timer is set, and timer period is t1, intervalometer then, by TimeB cumulative t1.
As shown in fig. 7, when TimeA and TimeB not on same node when, the maintenance of TimeB can
Comprise the steps：
1., by network communication, the time synchronized client on the node of TimeB places is located to TimeA and saves
Time synchronized service end on point sends the request of acquisition time；
2., after time synchronized service end receives request, the time of TimeA is read；
3. the time for reading is sent to time synchronized client by time synchronized service end；
4. time synchronized client using the time as TimeB initial time；
5. high-resolution timer is set, and timer period is t1, intervalometer then, by TimeB cumulative t1.
That is, reference clock source Time A are relatively accurate, the software clock TimeB of node can
Can be it is relatively inaccurate, accordingly, it would be desirable to periodically (such as 2 seconds once) with TimeA correct TimeB,
Value after correction is designated as TimeB1, will TimeB be set to TimeB1.If TimeB and TimeA
On same node, then directly TimeB is corrected using TimeA；If TimeB and TimeA do not exist
On same node, then TimeA is synchronized on the node at TimeB places, using it is synchronous obtain when
Between correcting TimeB, synchronous flow process is as shown in Figure 5.
According to different conditions and networking, there are following several typical embodiments.
Exemplary embodiment 1：
All nodes of whole communication apparatus all by the realization of generic server, PC or virtual machine, often
Individual needs and opposite equip. are synchronized
(or NTP Client).If Fig. 8 is enforcement figure under this kind of situation, its implementation is as follows：
1.1588slave (or NTP Client) is by 1588 agreements (or Network Time Protocol) to setting
Standby outside 1588master (or ntp server) carries out time synchronized；
2. the TimeA and local crystal oscillator on generic server/PC/virtual machine is corrected according to synchronized result；
3. local crystal oscillator safeguards TimeA by the vibration of itself；
4. TimeB is corrected using TimeA directly periodically；
5. TimeB is safeguarded using high-resolution timer；
6. the expired times that high-resolution timer is produced are modified using method as shown in Figure 10.
Specifically, as shown in Figure 10, the expired times that high-resolution timer is produced are modified may include
Following steps：
1. high-resolution timer is waited then；
2. high-resolution timer is then；
3. the cycle of the high-resolution timer is accumulated once on the basis of TimeB currencys, becomes newest
TimeB, and TimeB is synchronous with TimeA；
4. newest TimeB is compared with TimeBmax；Wherein, TimeBmax is equal to upper a cycle
TimeB,
5., if TimeB is more than TimeBmax, illustrate that TimeB is slower or equal than TimeA
(when (TimeB-TimeBmax) is equal to 1 high-resolution timer cycle, representing equal), then trigger
((TimeB-TimeBmax)/high-resolution timer cycle) secondary send and receive packets flow process, and TimeBmax is arranged
For the value of TimeB, 1 is jumped to；
6. if TimeB is less than TimeBmax, illustrate that TimeB is faster than TimeA, then this does not trigger
Send and receive packets flow process, TimeBmax keep constant, jump to 1.
Exemplary embodiment 2：
All nodes of whole communication apparatus all by the realization of generic server, PC or virtual machine, together
When only one of which node start 1588slave (or NTP Client).If Fig. 9 is under this kind of situation
Enforcement figure, its implementation is as follows：
1.1588slave (or NTP Client) is by 1588 agreements (or Network Time Protocol) to setting
Standby outside 1588master (or ntp server) carries out time synchronized；
2. the TimeA and local crystal oscillator on generic server/PC/virtual machine is corrected according to synchronized result；
3. local crystal oscillator safeguards TimeA by the vibration of itself；
4. using the synchronous method in TimeB the and TimeA time synchronized schematic diagrams shown in Fig. 5, will
TimeB and TimeA carries out time synchronized；
5. TimeB is corrected using the result after synchronization；
6. TimeB is safeguarded using high-resolution timer；
7. the expired times that high-resolution timer is produced are modified using method as shown in Figure 10.
Exemplary embodiment 3：
Clock module is provided in communication apparatus, clock synchronization is realized by line clock or GPS, but
Other nodes be generic server, PC or virtual machine, need and opposite equip. synchronize transmission and
The node of receiving data frames is also generic server, PC or virtual machine.Under this scene typically it is
Existing clock module this equipment in using current device, the maximum value for playing existing device.Only
There is line clock, during no GPS, be only suitable only for those and only requiring enter row clock synchronization with opposite equip.,
It is not required that the communication apparatus of time synchronized is carried out with opposite equip..If Figure 11 and Figure 12 is this kind of situation
Under enforcement figure, its implementation is as follows：
1.GPS modules (or line clock synchronization module) are received from GPS (or upper level clock module)
Time (or clock) it is synchronous；
2. correcting clock crystal oscillator and TimeA according to synchronized result (needs to correct TimeA when having GPS, only
TimeA need not be corrected when having line clock)；
3. clock crystal oscillator safeguards TimeA by the vibration of itself；
4. using the synchronous method in TimeB the and TimeA time synchronized schematic diagrams shown in Fig. 5, will
TimeB and TimeA carries out time synchronized；
5. TimeB is corrected using the result after synchronization；
6. TimeB is safeguarded using high-resolution timer；
7. the expired times that high-resolution timer is produced are modified using method as shown in Figure 10.
Accordingly, as shown in figure 13, the present invention also provides a kind of clock synchronization apparatus, including：
Initial time determining unit 901, needs to carry out the section of data transmit-receive for being determined according to reference clock source
The software clock initial time of point；
Current time determining unit 902, for according to the software clock initial time and data transmit-receive
The rhythm and pace of moving things, determines the software clock current time after data transmit-receive；
Adjustment unit 903, for current with the reference clock source according to the software clock current time
The time difference of time, adjusts the rhythm and pace of moving things of the data transmit-receive, so that the absolute value of the time difference is less than default
Threshold value.
Clock synchronizing method provided in an embodiment of the present invention, initial time determining unit 901 can be according to references
Clock source determines the software clock initial time of the node for needing to carry out data transmit-receive, current time determining unit
902 can be according to the software clock initial time and the rhythm and pace of moving things of data transmit-receive, after determining data transmit-receive
Software clock current time；Adjustment unit 903 can be according to the software clock current time and the reference
The time difference of the current time of clock source, adjusts the rhythm and pace of moving things of the data transmit-receive, so that the time difference is exhausted
To value less than predetermined threshold value.So, when data transmit-receive is carried out, can measure according to the rhythm and pace of moving things of data transmit-receive
Time, as the data transmit-receive rhythm and pace of moving things is controlled by local clock, through the accumulation of multiple data transmit-receive, this
Between ground clock and reference clock, small error is also gradually accumulated, and the error as software clock of accumulation is current
Time difference between time and the current time of reference clock source.Due to the time measurement and data of software clock
The transmitting-receiving rhythm and pace of moving things is relevant, software clock current time can be made also accordingly to adjust by the adjustment to the data transmit-receive rhythm and pace of moving things
It is whole, so as to above-mentioned time difference is limited in the range of very little all the time, reach this node and peer node
The clock synchronization of data transmit-receive.
Optionally, current time determining unit 902, specifically for：
On the node, the tick interrupt produced by intervalometer carries out data transmit-receive, and is interrupting every time
Afterwards, the timing cycle of the intervalometer is accumulated on the software clock initial time, by the tired of gained
Plus result is defined as the software clock current time after each data transmit-receive.
Optionally, adjustment unit 903, specifically for：
If the software clock current time is less than with the time difference of the current time of the reference clock source
Zero, determine that the software clock is partially slow, increase the number of times of the data transmit-receive；
If the software clock current time is more than with the time difference of the current time of the reference clock source
Zero, determine that the software clock is fast, reduce the number of times of the data transmit-receive.
Optionally, the data transmit-receive number of times for increasing or decreasing be equal to the time difference absolute value with it is adjacent twice
The ratio of the time interval of data transmit-receive.
Optionally, initial time determining unit 901, can be specifically for：
If the reference clock source is located at the node for needing to carry out data transmit-receive, when determining the software
Clock initial time is equal to the time of the reference clock source；
If the reference clock source in the node for needing to carry out data transmit-receive, the needs is not carried out
The local clock of the node of data transmit-receive is synchronized to the reference clock source, when determining that the software clock is initial
Between be equal to synchronization after the local clock.
Accordingly, the present invention also provides a kind of communication equipment, including any one clock that previous embodiment is provided
Synchronizer, therefore corresponding beneficial effect can be also realized, have been carried out above describing in detail, herein not
Repeat again.
Although being example purpose, the preferred embodiments of the present invention are had been disclosed for, those skilled in the art will
Recognize various improvement, increase and replacement be also it is possible, therefore, the scope of the present invention should be not limited to
State embodiment.
Claims (12)
1. a kind of clock synchronizing method, it is characterised in that include：
The software clock initial time of the node for needing to carry out data transmit-receive is determined according to reference clock source；
According to the software clock initial time and the rhythm and pace of moving things of data transmit-receive, the software after data transmit-receive is determined
Clock current time；
According to the software clock current time and the time difference of the current time of the reference clock source, adjust
The rhythm and pace of moving things of the data transmit-receive, so that the absolute value of the time difference is less than predetermined threshold value.
2. method according to claim 1, it is characterised in that described according at the beginning of the software clock
Time beginning and the rhythm and pace of moving things of data transmit-receive, determine that the software clock current time after data transmit-receive includes：
On the node, the tick interrupt produced by intervalometer carries out data transmit-receive, and is interrupting every time
Afterwards, the timing cycle of the intervalometer is accumulated on the software clock initial time, by the tired of gained
Plus result is defined as the software clock current time after each data transmit-receive.
3. method according to claim 1 and 2, it is characterised in that it is described according to the software when
Clock current time and the time difference of the current time of the reference clock source, adjust the section of the data transmit-receive
Rule, so that the absolute value of the time difference includes less than predetermined threshold value：
If the software clock current time is less than with the time difference of the current time of the reference clock source
Zero, determine that the software clock is partially slow, increase the number of times of the data transmit-receive；
If the software clock current time is more than with the time difference of the current time of the reference clock source
Zero, determine that the software clock is fast, reduce the number of times of the data transmit-receive.
4. method according to claim 3, it is characterised in that the data transmit-receive for increasing or decreasing
Number is equal to the absolute value of the time difference and the ratio of the time interval of adjacent data transmit-receive twice.
5. method according to claim 1, it is characterised in that needs are determined according to reference clock source
The software clock initial time for carrying out the node of data transmit-receive includes：
If the reference clock source is located at the node for needing to carry out data transmit-receive, when determining the software
Clock initial time is equal to the time of the reference clock source；
If the reference clock source in the node for needing to carry out data transmit-receive, the needs is not carried out
The local clock of the node of data transmit-receive is synchronized to the reference clock source, when determining that the software clock is initial
Between be equal to synchronization after the local clock.
6. method according to claim 1, it is characterised in that the reference clock source includes following
It is at least one：
1588 agreements Zhong Yuan；
NTP NTP clocks；
Global position system GPS clock source；
Higher level's line clock.
7. a kind of clock synchronization apparatus, it is characterised in that include：
Initial time determining unit, needs the node for carrying out data transmit-receive for determining according to reference clock source
Software clock initial time；
Current time determining unit, for the section according to the software clock initial time and data transmit-receive
Rule, determines the software clock current time after data transmit-receive；
Adjustment unit, for the current time according to the software clock current time and the reference clock source
Time difference, adjust the rhythm and pace of moving things of the data transmit-receive, so that the absolute value of the time difference is less than predetermined threshold value.
8. device according to claim 7, it is characterised in that the current time determining unit,
Specifically for：
On the node, the tick interrupt produced by intervalometer carries out data transmit-receive, and is interrupting every time
Afterwards, the timing cycle of the intervalometer is accumulated on the software clock initial time, by the tired of gained
Plus result is defined as the software clock current time after each data transmit-receive.
9. the device according to claim 7 or 8, it is characterised in that the adjustment unit, specifically
For：
If the software clock current time is less than with the time difference of the current time of the reference clock source
Zero, determine that the software clock is partially slow, increase the number of times of the data transmit-receive；
If the software clock current time is more than with the time difference of the current time of the reference clock source
Zero, determine that the software clock is fast, reduce the number of times of the data transmit-receive.
10. device according to claim 9, it is characterised in that the data transmit-receive for increasing or decreasing
Number is equal to the absolute value of the time difference and the ratio of the time interval of adjacent data transmit-receive twice.
11. devices according to claim 7, it is characterised in that the initial time determining unit,
Specifically for：
If the reference clock source is located at the node for needing to carry out data transmit-receive, when determining the software
Clock initial time is equal to the time of the reference clock source；
If the reference clock source in the node for needing to carry out data transmit-receive, the needs is not carried out
The local clock of the node of data transmit-receive is synchronized to the reference clock source, when determining that the software clock is initial
Between be equal to synchronization after the local clock.
12. a kind of communication equipments, it is characterised in that be provided with claim 7 to 11 on the communication equipment
Any one of clock synchronization apparatus.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510633536.1A CN106559157A (en) | 2015-09-29 | 2015-09-29 | A kind of clock synchronizing method, device and communication equipment |
| PCT/CN2016/090181 WO2017054554A1 (en) | 2015-09-29 | 2016-07-15 | Clock synchronization method, device, and communication apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510633536.1A CN106559157A (en) | 2015-09-29 | 2015-09-29 | A kind of clock synchronizing method, device and communication equipment |
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| CN106559157A true CN106559157A (en) | 2017-04-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510633536.1A Pending CN106559157A (en) | 2015-09-29 | 2015-09-29 | A kind of clock synchronizing method, device and communication equipment |
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| Country | Link |
|---|---|
| CN (1) | CN106559157A (en) |
| WO (1) | WO2017054554A1 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107040327A (en) * | 2017-06-14 | 2017-08-11 | 深圳市华信天线技术有限公司 | Slave TDMA slot synchronous calibration method and device |
| CN110098884A (en) * | 2018-01-31 | 2019-08-06 | 慧与发展有限责任合伙企业 | Determine exception clock |
| CN110502310A (en) * | 2018-05-18 | 2019-11-26 | 北京东土科技股份有限公司 | A kind of method for synchronizing time and device of virtual machine |
| WO2020063420A1 (en) * | 2018-09-26 | 2020-04-02 | 华为技术有限公司 | Synchronization cycle determination method, device, and system |
| CN113009899A (en) * | 2019-12-20 | 2021-06-22 | 金卡智能集团股份有限公司 | RTC (real time clock) calibration method for high-precision timing of metering instrument |
| CN113687686A (en) * | 2021-08-10 | 2021-11-23 | 北京小米移动软件有限公司 | Clock synchronization method and device, electronic equipment and storage medium |
| CN113687916A (en) * | 2021-08-17 | 2021-11-23 | 锐捷网络股份有限公司 | Data processing method and device, time updating method and device and electronic equipment |
| CN113687686B (en) * | 2021-08-10 | 2024-05-14 | 北京小米移动软件有限公司 | Clock synchronization method, clock synchronization device, electronic equipment and storage medium |
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| CN111208866B (en) * | 2019-12-27 | 2022-10-28 | 视联动力信息技术股份有限公司 | System time adjusting method and device |
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| CN1780488B (en) * | 2004-11-23 | 2010-05-05 | 中兴通讯股份有限公司 | Clock calibrater for program control switchboard system |
| CN1933414A (en) * | 2005-09-13 | 2007-03-21 | 上海欣泰通信技术有限公司 | Time regulation algorithm for network time synchronizing in telecommunication field |
| CN100371851C (en) * | 2006-11-27 | 2008-02-27 | 杭州华三通信技术有限公司 | Time synchronizing method and device |
| JP2012128552A (en) * | 2010-12-14 | 2012-07-05 | Hitachi Ltd | Information processing apparatus and time synchronizing method of information processing apparatus |
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2015
- 2015-09-29 CN CN201510633536.1A patent/CN106559157A/en active Pending
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- 2016-07-15 WO PCT/CN2016/090181 patent/WO2017054554A1/en active Application Filing
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| CN107040327A (en) * | 2017-06-14 | 2017-08-11 | 深圳市华信天线技术有限公司 | Slave TDMA slot synchronous calibration method and device |
| CN107040327B (en) * | 2017-06-14 | 2019-04-02 | 深圳市华信天线技术有限公司 | Slave TDMA slot synchronous calibration method and device |
| CN110098884A (en) * | 2018-01-31 | 2019-08-06 | 慧与发展有限责任合伙企业 | Determine exception clock |
| US11582706B2 (en) | 2018-01-31 | 2023-02-14 | Hewlett Packard Enterprise Development Lp | Determine abnormal clock |
| CN110502310A (en) * | 2018-05-18 | 2019-11-26 | 北京东土科技股份有限公司 | A kind of method for synchronizing time and device of virtual machine |
| CN110502310B (en) * | 2018-05-18 | 2021-12-14 | 北京东土科技股份有限公司 | Time synchronization method and device of virtual machine |
| WO2020063420A1 (en) * | 2018-09-26 | 2020-04-02 | 华为技术有限公司 | Synchronization cycle determination method, device, and system |
| CN113009899A (en) * | 2019-12-20 | 2021-06-22 | 金卡智能集团股份有限公司 | RTC (real time clock) calibration method for high-precision timing of metering instrument |
| CN113687686A (en) * | 2021-08-10 | 2021-11-23 | 北京小米移动软件有限公司 | Clock synchronization method and device, electronic equipment and storage medium |
| CN113687686B (en) * | 2021-08-10 | 2024-05-14 | 北京小米移动软件有限公司 | Clock synchronization method, clock synchronization device, electronic equipment and storage medium |
| CN113687916A (en) * | 2021-08-17 | 2021-11-23 | 锐捷网络股份有限公司 | Data processing method and device, time updating method and device and electronic equipment |
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| WO2017054554A1 (en) | 2017-04-06 |
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