CN103582108B - Method, device and system for synchronizing time - Google Patents
Method, device and system for synchronizing time Download PDFInfo
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- CN103582108B CN103582108B CN201210255587.1A CN201210255587A CN103582108B CN 103582108 B CN103582108 B CN 103582108B CN 201210255587 A CN201210255587 A CN 201210255587A CN 103582108 B CN103582108 B CN 103582108B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/0005—Synchronisation arrangements synchronizing of arrival of multiple uplinks
Abstract
The invention discloses a method, device and system for synchronizing time. The method comprises the steps that within the set duration, the time delay carrier parameter values corresponding to representation signal changes of received reference signals sent by a terminal are determined; the reliability values for measuring accuracy of the time delay carrier parameter values are determined according to the determined time delay carrier parameter values; the time delay adjusting values are determined according to the time delay carrier parameter values and the reliability values, and are sent to the terminal. By means of the technical scheme, the accuracy of time synchronization between a base station and the terminal can be well improved, and communication quality can be improved.
Description
Technical field
The present invention relates to digital signal processing technique field, more particularly, to a kind of method for synchronizing time, apparatus and system.
Background technology
At present, in the duplex communication mode of mobile communication, mainly including FDD (FDD, Frequency
Division Duplexing) pattern and time division duplex (TDD, Time Division Duplexing) pattern.Wherein, in TDD
In the mobile communication system of pattern, base station can carry out the reception and transmission of data by a frequency channels.In practical application,
Tdd mode mainly sends the time of data and the time of receiving data in same frequency channel by control, makes the base station can
Data are sent to terminal with the appointed time interior, specify the data that receiving terminal sends in the time, i.e. tdd mode to adopt second
The mode of time-division control realizes the control in same frequency channel to data transfer, reaches the purpose of duplex communication.
Due to the above-mentioned duplex communication mode supported by tdd mode, terminal needs the data transfer according to itself with base station
Distance, the at the appointed time interior transmission that data are carried out to base station otherwise, will miss base station by frequency channels receiving data
Time, cause the communication failure of terminal and base station.At present, base station can be carried out by base station itself to the time that terminal sends data
Control, but for the terminal to base station transmission data, then after needing the communication path at itself and base station between to change, and
When according to base station send configured information adjust to base station send data time, to ensure the success communication of terminal and base station.
In practical application, based on the mobility of terminal, base station is enable to specify using modes such as initial synchronisations with each terminal in base station
After time receives the data that each terminal sends, if the position of terminal changes simultaneously, terminal need to calibrate in time itself to
Base station sends the time of data, it is ensured that send data success to base station, i.e., keep uplink synchronous with base station.
At present, terminal controls the time for itself data being sent to base station mainly by the way of the intervalometer of regulating allocation.
In practical application, the form of the data for interacting can be arranged in terminal and base station, for example, data be carried out in the way of specified sequence
Characterize, the specified sequence is generally the good sequence of strong autocorrelation, such as ZC sequences.Former specified sequence of the base station according to agreement
Specified sequence to receiving carries out relative operation, to determine that the time of base station reception specified sequence refers to should actually receive
The time of sequencing row whether there is difference, i.e., determine time delay adjusted value by base station, the time delay adjusted value is sent to terminal, with
Instruction terminal carries out time synchronized adjustment, i.e. instruction terminal and adjusts to base station the time for sending data.
But method for synchronizing time in prior art, when base station determines time delay adjusted value according to the specified sequence for receiving,
There may be the relatively low problem of accuracy.For example, the specified sequence interference strength that interference signal is sent to terminal is larger, causes base
The result that the specified sequence to receiving of standing is carried out after relative operation is inaccurate, and then determines the Delay for making mistake；Also may be used
Can be as, when terminal is moved, surrounding buildingses cause to reach the sequence and normal arrival base of base station after reflection than comparatively dense
The sequence stood generates superposition, and then base station is carried out relative operation and is determined channel estimation in the specified sequence to receiving
After sequence, when the position of peak value is determined according to channel estimation sequence, there are multiple peak values in discovery, so as to interference base station judges to connect
The accuracy of specified sequence time delay is received, base station is even resulted in and is determined the time delay adjusted value for making mistake, and then adjust in instruction terminal
After sending the time of data, base station is made to fail with terminal communication.
In sum, method for synchronizing time in prior art, accuracy are relatively low so that communication quality is poor.
The content of the invention
A kind of method for synchronizing time, apparatus and system are embodiments provided, preferably can be improved base station and end
The accuracy of time synchronized between end, lifts communication quality.
A kind of method for synchronizing time, including：In setting duration, it is determined that each the reference letter sent by terminal for receiving
Number corresponding sign signal intensity time delay bearer parameter values；According to the time delay bearer parameter values determined, it is determined that for weighing
Measure the confidence value of each time delay bearer parameter values accuracy；According to the time delay bearer parameter values and the confidence value, really
Fixed response time adjusted value is simultaneously sent to terminal, wherein, terminal carries out time synchronized adjustment according to the time delay adjusted value.
A kind of time synchronism apparatus, including：Time delay bearer parameter values determining unit, in setting duration, it is determined that connecing
The time delay bearer parameter values of the corresponding sign signal intensity of each reference signal sent by terminal for receiving；Confidence value is true
Order unit, for the time delay bearer parameter values determined according to time delay bearer parameter values determining unit, it is determined that for weighing each
The confidence value of time delay bearer parameter values accuracy；Transmitting element, for true according to the time delay bearer parameter values determining unit
The confidence value that the time delay bearer parameter values and the confidence value determining unit made are determined, determines that time delay adjusted value is concurrent
Terminal is given, wherein, terminal carries out time synchronized adjustment according to the time delay adjusted value.
A kind of clock synchronization system, including：Base station, the base station include above-mentioned time synchronism apparatus；Terminal, for according to
Preset rules determine whether to receive the time delay adjusted value；If receiving the time delay adjusted value, adjusted according to the time delay
The time of value adjustment sending signal；If not receiving the time delay adjusted value, it is determined whether beyond default reception duration, if
It is to send desynchronizing state signal, conversely, continuing to time delay adjusted value.
By above-mentioned technical proposal, the corresponding time delay carrier of each reference signal that terminal is sent in setting duration is determined
Parameter value, according to the time delay bearer parameter values, it is determined that the confidence value of each time delay bearer parameter values accuracy is weighed, then
According to the time delay bearer parameter values and the confidence value, determine time delay adjusted value and be sent to terminal.It is credible by introducing
Angle value can be further processed to the coherent signal for being related to time synchronized, obtain more stable constraining and optimize coherent signal
With accurate time delay adjusted value and terminal is sent to, to improve the accuracy of time synchronized between base station and terminal, lifts communication
Quality.
Description of the drawings
During Fig. 1 is the embodiment of the present invention one, the method for synchronizing time flow chart of proposition；
During Fig. 2 is the embodiment of the present invention two, the time synchronism apparatus structural representation of proposition.
Specific embodiment
For present in prior art, between base station and terminal, the accuracy of time synchronized is relatively low, communication quality is poor
Problem, embodiment of the present invention technique proposed herein scheme, by introducing confidence value, constrain and optimize coherent signal, energy
Enough coherent signals to being related to time synchronized are further processed, and obtain stable and accurate time delay adjusted value and are sent to end
End, to improve the accuracy of time synchronized between base station and terminal, lifts communication quality.
Below in conjunction with each accompanying drawing to embodiment of the present invention technical scheme it is main realize principle, specific embodiment and
Which is set forth in the beneficial effect that should be able to be reached.
Embodiment one
The embodiment of the present invention one proposes a kind of method for synchronizing time here, as shown in figure 1, concrete handling process is as follows：
Step 11, in setting duration, the reference signal that receiving terminal is sent.
Wherein, the reference signal that terminal is sent to base station, can be pilot signal, or its comprising reference signal
His signal of communication, if other signals of communication comprising reference signal, need reference signal is extracted from signal of communication
Come.
Specifically, the reference signal that terminal is sent is the sequence with strong autocorrelation, and the embodiment of the present invention one is here eventually
The reference signal that end sends is being described in detail as a example by ZC sequences.
Step 12, determines the time delay Bearer parameters of the corresponding sign signal intensity of each reference signal that terminal is sent
Value.
Wherein, time delay bearer parameter values can be, but not limited to include channel estimation sequence corresponding with reference signal is received
Row, performance number corresponding with the reference signal for receiving and call number for being obtained by the reference signal for receiving etc..Above-mentioned
In three time delay bearer parameter values, both channel estimation sequence and performance number are taken the form of and are embodied in the way of sequence, but
Call number is the numerical value specifically determined.
Specifically, can be, but not limited to using following several ways determine that terminal is setting each ginseng sent in duration
Examine the time delay bearer parameter values of the corresponding sign signal intensity of signal：
First kind of way：Each reference signal for carrying out self terminal for receiving is carried out into related fortune to default reference signal
Calculate, obtain channel estimation sequence, using the channel estimation sequence as time delay corresponding with each reference signal that terminal is sent
Bearer parameter values.For example, if the reference signal for carrying out self terminal is A '=a 'p=a0′,a1′,a2′…a′P-1, wherein 0≤p≤Q-
The call number of 1, the p position for the element in sequence in the sequence, Q is the length of the reference signal for carrying out self terminal；Default ginseng
Signal is examined for A=ap=a0,a1,a2…aP-1, wherein the index of the position of 0≤p≤Q-1, p for the element in sequence in the sequence
Number, Q is the length of default reference signal, then carry out related operation to sequence A and A' using formula 1：
WhereinFor the channel estimation sequence that related operation is obtained, 0≤r≤R-1, r are each
The call number of element position in the sequence, the length of the channel estimation sequence that R is obtained for related operation, mod represent two number phases
Except remainder, m is to set the number of times index for sending reference signal in duration.
The second way：Each reference signal for carrying out self terminal for receiving is carried out into related fortune to default reference signal
Calculate, in the channel estimation sequence that related operation is obtained, determine the performance number of each element in the channel estimation sequence, by institute
Performance number is stated as time delay bearer parameter values corresponding with each reference signal that terminal is sent.
Wherein it is determined that the specific implementation of channel estimation sequence refers to elaborating for above-mentioned first kind of way, this
In repeat no more.In the channel estimation sequence that related operation is obtainedIn, determined using formula 2
The performance number of each element in the sequence.
Wherein, 0≤r≤R-1, r are the call number of element corresponding with performance number position in the sequence, and R is related fortune
The length of the channel estimation sequence for obtaining, P is performance number, CmIt is channel estimation sequence, m is to set to send reference in duration
The number of times index of signal.
The third mode：Each reference signal for carrying out self terminal for receiving is carried out into related fortune to default reference signal
Calculate.In the channel estimation sequence that related operation is obtained, the performance number of each element in the channel estimation sequence is determined, it is determined that
The call number of element corresponding with maximum power value position in the sequence, using the call number determined as every with what terminal was sent
The corresponding time delay bearer parameter values of individual reference signal.
Wherein it is determined that channel estimation sequence and according to determine channel estimation sequence obtain each element in the sequence
The specific embodiment of performance number, refers to elaborating for above-mentioned first kind of way and the second way, repeats no more here.
In channel estimation sequence is determined after the corresponding performance number of each element, i.e., in calculated performance number, it is determined that with
Call number r of the corresponding element of maximum power value position in the sequence.
It should be noted that call number r determined, also corresponds to time delay adjusted value, proposes in the prior art
In technical scheme, the call number determined is sent to into terminal, instruction terminal root directly as final time delay adjusted value typically
Carry out time synchronized adjustment according to the time delay adjusted value for receiving, this simple mode for determining time delay adjusted value, accuracy compared with
It is low.
Step 13, according to the time delay bearer parameter values determined, it is determined that accurate for weighing each time delay bearer parameter values
The confidence value of property.
Wherein, weigh each delay parameter value accuracy confidence value can be, but not limited to include absolute confidence angle value and
Relative reliability value.
Specifically, the determination of absolute confidence angle value is can be, but not limited to using one or several in following several ways
To determine：
First kind of way：Absolute confidence angle value is determined according to the channel estimation sequence.
Wherein it is possible to but be not limited to, using following methods, determine absolute confidence angle value according to the channel estimation sequence：
A：Absolute confidence angle value is determined according to following formula 3：
Wherein, SNRTHFor default signal-to-noise ratio, SIR in communication systemmIt is that the corresponding signal of channel estimation sequence is done
Disturb ratio.
It is preferred that the embodiment of the present invention is here by SNRTHIt is redefined for the minimum signal interference allowed by communication system
Than SIRmCan be determined by following formula 4：
Wherein,For channel estimation sequence, 0≤r≤R-1, r are the call number of each element position in the sequence, and R is phase
Close the length of the channel estimation sequence that computing is obtained.
B:Absolute confidence angle value is determined according to following formula 5：
Wherein αmIt is absolute confidence angle value, CmIt is channel estimation sequence, max | Cm| it is to channel estimation sequence Cm
Modulus of access simultaneously takes maximum therein, XTHIt is default credible threshold value corresponding with the channel estimation sequence, when m is setting
The number of times index for sending reference signal in length.
The second way：Absolute confidence angle value is determined according to the performance number.
Wherein, after the corresponding channel estimation sequence of each reference signal determined with terminal is sent, by channel
Estimated sequence, can obtain the corresponding performance number of each element in channel estimation sequence, and whole performance numbers constitute power delay spectrum,
That is, the sequence that power delay spectrum is made up of performance number.Specifically, performance number is by by channel estimation sequence
In each element modulus after take what its square was worth to, specifically can be found in above-mentioned formula 2.
Specifically, can be by following formula 6, realization determines absolute confidence angle value according to the performance number：
Wherein, αmIt is absolute confidence angle value, YTHIt is default threshold value, | Cm|2It is performance number.
The third mode：Absolute confidence angle value is determined according to the call number.
Wherein, call number is, after performance number is obtained, to further determine that out.Terminal issues the reference letter of base station
Number, such as ZC sequences obtain channel estimation sequence after doing correlation computations, obtain channel according further to channel estimation sequence
The performance number of each element in estimated sequence, the performance number for selecting the numerical value that obtains maximum corresponding call number in the sequence.Tool
Body ground, can determine absolute confidence angle value by following formula 7：
Wherein, αmIt is absolute confidence angle value, tTHIt is default threshold value, N is the corresponding call number of maximum power value.
Specifically, the determination of relative reliability value is can be, but not limited to using one or several in following manner come really
It is fixed：
First kind of way：Relative reliability value is determined according to the channel estimation sequence.
Specifically, can be, but not limited to, using following methods, determine relative reliability value according to the channel estimation sequence：
A：Relative reliability value can be determined according to formula 8：
βm=SIRmFormula 8
Wherein, βmIt is relative reliability value, SIRmIt is the corresponding signal-to-noise ratio of channel estimation sequence.
B：Relative reliability value can be determined according to formula 9：
βm=max | Cm| formula 9
Wherein, βmIt is relative reliability value, CmIt is channel estimation sequence, max | Cm| it is to channel estimation sequence Cm
Modulus of access simultaneously takes maximum therein.
The second way：Relative reliability value is determined according to the performance number.
Specifically, relative reliability value can be determined according to the performance number by following formula 10：
βm=max | Cm|2Formula 10
Wherein, βmIt is relative reliability value, CmIt is channel estimation sequence, max | Cm|2It is to channel estimation sequence Cm
Modulus of access square performance number for obtaining, and take the maximum in the performance number.
A kind of preferably implementation, after absolute confidence angle value and relative reliability value is determined, will can determine
The storage corresponding with relative reliability value of the absolute confidence angle value that goes out, specifically, as shown in table 1, be the embodiment of the present invention one here
A kind of mode of the absolute confidence angle value storage corresponding with corresponding time delay bearer parameter values for proposing：
Table 1
As shown in table 2, it is a kind of relative reliability value and corresponding time delay carrier that the embodiment of the present invention one is proposed here
The mode of parameter value correspondence storage：
Table 2
As shown in table 3, be a kind of absolute confidence angle value that the embodiment of the present invention one is proposed here and relative reliability value with
The mode of corresponding time delay bearer parameter values correspondence storage：
Step 14, according to the time delay bearer parameter values and the confidence value, determines time delay adjusted value and is sent to end
End.
Wherein it is possible to but be not limited to determine time delay adjusted value using following two ways：
First kind of way：Sue for peace after each confidence value determined is multiplied with time delay bearer parameter values, take which and put down
Average, the result for obtaining is used as time delay adjusted value.
Wherein, as confidence value includes absolute confidence angle value and relative reliability value, the two can be used in combination, also may be used
To be used alone, specially：
Time delay adjusted value is determined by absolute confidence angle value：
Wherein TA is time delay adjusted value, αmIt is absolute confidence angle value, tmIt is performance number.
Time delay adjusted value is determined by relative reliability value：
Wherein TA is time delay adjusted value, βmIt is relative reliability value, tmIt is performance number.
In the prior art, it is general to determine that time delay is adjusted by the way of all performance numbers merging for obtaining are averaged
Value, i.e., by formulaThe time delay adjusted value for being sent to terminal is determined, the contrast embodiment of the present invention one is carried here
The technical scheme for going out, such as formula 10 and formula 11, the embodiment of the present invention one is here it is determined that during time delay adjusted value, further draw
Enter confidence value, that is to say, that in using one technique proposed herein scheme of the embodiment of the present invention, it is determined that time delay adjusted value
When, by confidence value, the relatively low numerical value of some accuracys is eliminated, is then merged again and is taken average, preferably improve really
The accuracy of fixed response time adjusted value.
The second way：Sue for peace after each confidence value determined is multiplied with time delay bearer parameter values, it is determined that
To maximum and value corresponding call number in the sequence for obtaining, using the call number as time delay adjusted value.
Wherein, as confidence value includes absolute confidence angle value and relative reliability value, the two can be used in combination, also may be used
To be used alone, specially：
Time delay adjusted value is determined by absolute confidence angle value：
Wherein TA is time delay adjusted value, αmIt is absolute confidence angle value, P is performance number.
Time delay adjusted value is determined by relative reliability value：
Wherein TA is time delay adjusted value, βmIt is relative reliability value, P is performance number.
Time delay adjusted value is determined together with reference to absolute confidence angle value and relative reliability value：
Wherein TA is time delay adjusted value, αmIt is absolute confidence angle value, βmIt is relative reliability value, P is performance number.
In the prior art, it is general to try to achieve maximum using by all performance numbers merging for obtaining, it is then determined that try to achieve
Maximum call number in the sequence, is sent to terminal using the call number for obtaining as time delay adjusted value, i.e., by formulaThe time delay adjusted value for being sent to terminal is determined, the skill that the embodiment of the present invention one is proposed here is contrasted
Art scheme, such as formula 12～14, the embodiment of the present invention one is here it is determined that during time delay adjusted value, further introduce credibility
Value, that is to say, that in using one technique proposed herein scheme of the embodiment of the present invention, it is determined that during time delay adjusted value, by can
Certainty value, eliminates the relatively low numerical value of some accuracys, then merges again and take average, preferably improves determination time delay adjustment
The accuracy of value.
Step 15, after the time delay determined adjusted value is sent to terminal, terminal is determined whether according to preset rules
The time delay adjusted value is received, if it is judged that be yes, execution step 16, otherwise execution step 17.
It is preferred that end side can arrange an intervalometer, the intervalometer can be arranged on terminal inner, it is also possible to arrange
On the outside of terminal, that is to say, that the setting to intervalometer does not carry out concrete restriction.
Step 16, if terminal receives the time delay adjusted value, according to the time delay adjusted value adjust sending signal when
Between, that is, carry out time synchronized adjustment.
It is preferred that when terminal carries out time synchronized adjustment according to the time delay adjusted value for receiving, replacement is arranged on end side
Intervalometer, will its reset and reclocking.
Step 17, if not receiving the time delay adjusted value, it is determined whether beyond default reception duration, if it is judged that
It is yes, execution step 171, on the contrary execution step 172.
Step 171, to determine and receive duration beyond default, terminal sends desynchronizing state signal, wherein desynchronizing state signal
For reporting desynchronizing state.
Specifically, however, it is determined that go out beyond preset duration, also do not receive time delay adjusted value, that is to say, that be arranged on end side
Timer expiry, now, stop intervalometer timework, and stop receive time delay adjusted value, send desynchronizing state signal,
Desynchronizing state is reported to base station or other desynchronizing state adjusting devices.
Step 172, determines that, without departing from default reception duration, terminal continues to time delay adjusted value.
Specifically, the intervalometer of end side is arranged on not departing from default reception duration, then terminal continuation is according to default
Reception duration, receive time delay adjusted value.
Embodiment two
Correspondingly, the embodiment of the present invention two proposes a kind of time synchronism apparatus here, it should be noted that the present invention is implemented
The time synchronism apparatus that example two is proposed here, can be arranged on base station side as an independent equipment, it is also possible to as one
Integrated module is arranged in a base station, two technique proposed herein scheme of the embodiment of the present invention, using the time synchronism apparatus as
One integrated module is arranged in a base station, concrete structure as shown in Fig. 2 including：
Time delay bearer parameter values determining unit 201, for setting duration in, it is determined that receive by terminal send it is every
The time delay bearer parameter values of the corresponding sign signal intensity of individual reference signal.
Specifically, above-mentioned time delay bearer parameter values determining unit 201, specifically for by receive come self terminal each ginseng
Examining signal and default reference signal carries out related operation, obtains channel estimation sequence, using the channel estimation sequence as with
The corresponding time delay bearer parameter values of each reference signal that terminal is sent；Or by receive each reference signal for carrying out self terminal with
Default reference signal carries out related operation, in the channel estimation sequence that related operation is obtained, determines the channel estimation sequence
The performance number of each element in row, joins the performance number as time delay carrier corresponding with each reference signal that terminal is sent
Numerical value；Or each reference signal for carrying out self terminal for receiving is carried out into related operation with default reference signal.In related operation
In the sequence for obtaining, the performance number of each element in the sequence is determined, it is determined that element corresponding with maximum power value is in sequence
The call number of middle position, using the call number determined as time delay Bearer parameters corresponding with each reference signal that terminal is sent
Value.
Confidence value determining unit 202, for the time delay carrier determined according to time delay bearer parameter values determining unit 201
Parameter value, it is determined that the confidence value for weighing each time delay bearer parameter values accuracy.
Wherein, the confidence value includes absolute confidence angle value；Above-mentioned confidence value determining unit 202, specifically for logical
One or more crossed in following manner determine absolute confidence angle value according to the channel estimation sequence；It is true according to the performance number
Determine absolute confidence angle value；Absolute confidence angle value is determined according to the call number.
Wherein, the confidence value includes relative reliability value；Confidence value determining unit 202, specifically for according to institute
State channel estimation sequence and determine relative reliability value；And/or relative reliability value is determined according to the performance number.
Specifically, above-mentioned confidence value determining unit 202, specifically using following methods, according to the channel estimation sequence
Determine absolute confidence angle value：
According to formulaDetermine absolute confidence angle value, wherein, SNRTHFor communication system
In default signal-to-noise ratio, SIRmIt is the corresponding signal-to-noise ratio of channel estimation sequence；Or
According to formulaDetermine absolute confidence angle value, wherein αmIt is absolute confidence degree
Value, CmIt is channel estimation sequence, max | Cm| it is to channel estimation sequence CmModulus of access simultaneously takes maximum therein, XTHIt is
Default credible threshold value corresponding with the channel estimation sequence, m are to set the number of times rope for sending reference signal in duration
Draw.
Specifically, above-mentioned confidence value determining unit 202, specifically using following methods, determines according to the performance number exhausted
To confidence value：
Wherein, αmIt is absolute confidence angle value, tTHIt is default threshold value, tmIt is performance number.
Specifically, above-mentioned confidence value determining unit 202, specifically using following formula, determines according to call number and definitely may be used
Certainty value：
Wherein, αmIt is absolute confidence angle value, tTHIt is default threshold value, N is the corresponding call number of maximum power value.
Specifically, above-mentioned confidence value determining unit 202, specifically using following methods, according to the channel estimation sequence
Determine relative reliability value：
According to formula βm=SIRmDetermine relative reliability value, wherein, βmIt is relative reliability value, SIRmIt is channel estimation
The corresponding signal-to-noise ratio of sequence；Or
According to formula βm=max | Cm| determine relative reliability value, wherein βmIt is relative reliability value, CmIt is that channel is estimated
Meter sequence, max | Cm| it is to channel estimation sequence CmModulus of access simultaneously takes maximum therein.Specifically, above-mentioned credibility
Value determining unit 202, specifically using following formula, determines relative reliability value according to the performance number：βm=max | Cm|2,
Wherein, βmIt is relative reliability value, CmIt is channel estimation sequence, max | Cm|2It is to channel estimation sequence CmModulus of access is simultaneously
Square performance number for obtaining, and take the maximum in the performance number.
Transmitting element 203, for the time delay Bearer parameters determined according to the time delay bearer parameter values determining unit 201
The confidence value that value and the confidence value determining unit 202 are determined, determines time delay adjusted value and is sent to terminal, wherein,
Terminal carries out time synchronized adjustment according to the time delay adjusted value.
Specifically, above-mentioned transmitting element 203, specifically for by each confidence value determined and time delay bearer parameter values
Sue for peace after multiplication, take its meansigma methods, the result for obtaining is used as prolonging adjusted value in real time；Or by each confidence value determined with
Time delay bearer parameter values are sued for peace after being multiplied, it is determined that the maximum for obtaining and value corresponding call number in the sequence for obtaining, by institute
Call number is stated as time delay adjusted value.
Correspondingly, the embodiment of the present invention also proposes a kind of clock synchronization system, including base station and terminal here：
Wherein, base station includes above-mentioned time synchronism apparatus, is mainly used in signal that receiving terminal sends and sends to terminal
Time delay adjusted value.
Terminal, for determining whether to receive the time delay adjusted value according to preset rules；If receiving the time delay to adjust
Whole value, adjusts the time of sending signal according to the time delay adjusted value；If not receiving the time delay adjusted value, it is determined whether super
Go out to preset reception duration, if it is, desynchronizing state signal is sent, conversely, continuing to time delay adjusted value.
It should be appreciated that the unit that includes of apparatus above only according to the logical partitioning that carries out of the function realized of the device, it is real
In the application of border, the superposition or fractionation of said units can be carried out.And the function realized by the device that the embodiment is provided with it is upper
A kind of method for synchronizing time flow process for stating embodiment offer is corresponded, for the more detailed processing stream realized by the device
Journey, is described in detail in said method embodiment, is not described in detail herein.
Using embodiment of the present invention technique proposed herein scheme, credibility is introduced in the synchronizing process of base station and terminal
Value constraining and optimize coherent signal, to improve the stability and accuracy of time synchronized.Confidence value is included to certain window
The analysis of any variation characteristic of measured some channel qualities and time delay bearer parameter values in time is preferably carried with regard to Ei mistakes
The accuracy of the high time delay adjusted value determined, so as to realize the accuracy of time synchronized between base station and terminal, preferably
Communication quality is lifted, relatively stable and accurate system synchronization performance is obtained.
Obviously, those skilled in the art can carry out the essence of various changes and modification without deviating from the present invention to the present invention
God and scope.So, if these modifications of the present invention and modification belong to the scope of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to comprising these changes and modification.
Claims (34)
1. a kind of method for synchronizing time, it is characterised in that include：
Setting duration in, it is determined that the corresponding sign signal intensity of each reference signal sent by terminal for receiving when
Prolong bearer parameter values；
According to the time delay bearer parameter values determined, it is determined that the credibility for weighing each time delay bearer parameter values accuracy
Value；
According to the time delay bearer parameter values and the confidence value, determine time delay adjusted value and be sent to terminal, wherein, terminal
Time synchronized adjustment is carried out according to the time delay adjusted value；
Wherein, in setting duration, it is determined that the corresponding sign signal of each reference signal sent by terminal for receiving becomes
The time delay bearer parameter values of change, including：Each reference signal for carrying out self terminal for receiving is carried out into phase with default reference signal
Computing is closed, channel estimation sequence is obtained, using the channel estimation sequence as corresponding with each reference signal that terminal is sent
Time delay bearer parameter values；The confidence value includes absolute confidence angle value, using following methods, according to the channel estimation sequence
Determine absolute confidence angle value：
According to formulaDetermine absolute confidence angle value, wherein, SNRTHFor pre- in communication system
If signal-to-noise ratio, SIRmIt is the corresponding signal-to-noise ratio of channel estimation sequence；Or
According to formulaDetermine absolute confidence angle value, wherein αmIt is absolute confidence angle value, Cm
It is channel estimation sequence, max | Cm| it is to channel estimation sequence CmModulus of access simultaneously takes maximum therein, XTHIt is default
Credible threshold value corresponding with the channel estimation sequence, m be set duration in send reference signal number of times index.
2. the method for claim 1, it is characterised in that the confidence value includes relative reliability value；
The time delay bearer parameter values that the basis is determined, it is determined that for weighing the credible of each time delay bearer parameter values accuracy
Angle value, including：
Relative reliability value is determined according to the channel estimation sequence；And/or
Relative reliability value is determined according to performance number.
3. method as claimed in claim 2, it is characterised in that using following methods, determined according to the channel estimation sequence
Relative reliability value：
According to formula βm=SIRmDetermine relative reliability value, wherein, βmIt is relative reliability value, SIRmIt is channel estimation sequence pair
The signal-to-noise ratio answered；Or
According to formula βm=max | Cm| determine relative reliability value, wherein βmIt is relative reliability value, CmIt is channel estimation sequence
Row, max | Cm| it is to channel estimation sequence CmModulus of access simultaneously takes maximum therein.
4. method as claimed in claim 2, it is characterised in that using following formula, according to the performance number determine it is relative can
Certainty value：
βm=max | Cm|2}
Wherein, βmIt is relative reliability value, CmIt is channel estimation sequence, max | Cm|2It is to channel estimation sequence CmDelivery
Value square performance number for obtaining, and take the maximum in the performance number.
5. the method for claim 1, it is characterised in that according to the time delay bearer parameter values and the confidence value,
Determine time delay adjusted value, including：
Sue for peace after each confidence value determined is multiplied with time delay bearer parameter values, take its meansigma methods, the result for obtaining
As time delay adjusted value；Or
Sue for peace after each confidence value determined is multiplied with time delay bearer parameter values, it is determined that the maximum for obtaining and value are being obtained
To sequence in corresponding call number, using the call number as time delay adjusted value.
6. the method for claim 1, it is characterised in that after the time delay determined adjusted value is sent to terminal,
Also include：
Terminal determines whether to receive the time delay adjusted value according to preset rules；
If receiving the time delay adjusted value, the time of sending signal is adjusted according to the time delay adjusted value；
If not receiving the time delay adjusted value, it is determined whether beyond default reception duration, if it is, sending desynchronizing state letter
Number, conversely, continuing to time delay adjusted value.
7. a kind of method for synchronizing time, it is characterised in that include：
Setting duration in, it is determined that the corresponding sign signal intensity of each reference signal sent by terminal for receiving when
Prolong bearer parameter values；
According to the time delay bearer parameter values determined, it is determined that the credibility for weighing each time delay bearer parameter values accuracy
Value；
According to the time delay bearer parameter values and the confidence value, determine time delay adjusted value and be sent to terminal, wherein, terminal
Time synchronized adjustment is carried out according to the time delay adjusted value；
Wherein, in setting duration, it is determined that the corresponding sign signal of each reference signal sent by terminal for receiving becomes
The time delay bearer parameter values of change, including：
Each reference signal for carrying out self terminal for receiving is carried out into related operation with default reference signal, is obtained in related operation
Channel estimation sequence in, determine the performance number of each element in the channel estimation sequence, using the performance number as with end
The corresponding time delay bearer parameter values of each reference signal that end is sent；
Using following methods, absolute confidence angle value is determined according to the performance number：
Wherein, αmIt is absolute confidence angle value, YTHIt is default threshold value, | Cm|2It is performance number.
8. method as claimed in claim 7, it is characterised in that the confidence value includes relative reliability value；
The time delay bearer parameter values that the basis is determined, it is determined that for weighing the credible of each time delay bearer parameter values accuracy
Angle value, including：
Relative reliability value is determined according to the channel estimation sequence；And/or
Relative reliability value is determined according to the performance number.
9. method as claimed in claim 7, it is characterised in that using following methods, determined according to the channel estimation sequence
Relative reliability value：
According to formula βm=SIRmDetermine relative reliability value, wherein, βmIt is relative reliability value, SIRmIt is channel estimation sequence pair
The signal-to-noise ratio answered；Or
According to formula βm=max | Cm| determine relative reliability value, wherein βmIt is relative reliability value, CmIt is channel estimation sequence
Row, max | Cm| it is to channel estimation sequence CmModulus of access simultaneously takes maximum therein.
10. method as claimed in claim 8, it is characterised in that using following formula, according to the performance number determine it is relative can
Certainty value：
βm=max | Cm|2}
Wherein, βmIt is relative reliability value, CmIt is channel estimation sequence, max | Cm|2It is to channel estimation sequence CmDelivery
Value square performance number for obtaining, and take the maximum in the performance number.
11. methods as claimed in claim 7, it is characterised in that according to the time delay bearer parameter values and the confidence value,
Determine time delay adjusted value, including：
Sue for peace after each confidence value determined is multiplied with time delay bearer parameter values, take its meansigma methods, the result for obtaining
As time delay adjusted value；Or
Sue for peace after each confidence value determined is multiplied with time delay bearer parameter values, it is determined that the maximum for obtaining and value are being obtained
To sequence in corresponding call number, using the call number as time delay adjusted value.
12. methods as claimed in claim 7, it is characterised in that after the time delay determined adjusted value is sent to terminal,
Also include：
Terminal determines whether to receive the time delay adjusted value according to preset rules；
If receiving the time delay adjusted value, the time of sending signal is adjusted according to the time delay adjusted value；
If not receiving the time delay adjusted value, it is determined whether beyond default reception duration, if it is, sending desynchronizing state letter
Number, conversely, continuing to time delay adjusted value.
13. a kind of method for synchronizing time, it is characterised in that include：
Setting duration in, it is determined that the corresponding sign signal intensity of each reference signal sent by terminal for receiving when
Prolong bearer parameter values；
According to the time delay bearer parameter values determined, it is determined that the credibility for weighing each time delay bearer parameter values accuracy
Value；
According to the time delay bearer parameter values and the confidence value, determine time delay adjusted value and be sent to terminal, wherein, terminal
Time synchronized adjustment is carried out according to the time delay adjusted value；
Wherein, in setting duration, it is determined that the corresponding sign signal of each reference signal sent by terminal for receiving becomes
The time delay bearer parameter values of change, including：Each reference signal for carrying out self terminal for receiving is carried out into phase with default reference signal
Computing is closed, the performance number of each element in the sequence in the sequence that related operation is obtained, is determined, it is determined that and maximum power value
The call number of corresponding element position in the sequence, using the call number determined as each reference signal pair sent with terminal
The time delay bearer parameter values answered；
Using following formula, absolute confidence angle value is determined according to call number：
Wherein, αmIt is absolute confidence angle value, tTHIt is default threshold value, N is the corresponding call number of maximum power value.
14. methods as claimed in claim 13, it is characterised in that the confidence value includes relative reliability value；
The time delay bearer parameter values that the basis is determined, it is determined that for weighing the credible of each time delay bearer parameter values accuracy
Angle value, including：Relative reliability value is determined according to channel estimation sequence；And/or relative reliability is determined according to the performance number
Value.
15. methods as claimed in claim 14, it is characterised in that using following methods, true according to the channel estimation sequence
Determine relative reliability value：
According to formula βm=SIRmDetermine relative reliability value, wherein, βmIt is relative reliability value, SIRmIt is channel estimation sequence pair
The signal-to-noise ratio answered；Or
According to formula βm=max | Cm| determine relative reliability value, wherein βmIt is relative reliability value, CmIt is channel estimation sequence
Row, max | Cm| it is to channel estimation sequence CmModulus of access simultaneously takes maximum therein.
16. methods as claimed in claim 14, it is characterised in that using following formula, determined according to the performance number relative
Confidence value：
βm=max | Cm|2}
Wherein, βmIt is relative reliability value, CmIt is channel estimation sequence, max | Cm|2It is to channel estimation sequence CmDelivery
Value square performance number for obtaining, and take the maximum in the performance number.
17. methods as claimed in claim 13, it is characterised in that according to the time delay bearer parameter values and the credibility
Value, determines time delay adjusted value, including：
Sue for peace after each confidence value determined is multiplied with time delay bearer parameter values, take its meansigma methods, the result for obtaining
As time delay adjusted value；Or
Sue for peace after each confidence value determined is multiplied with time delay bearer parameter values, it is determined that the maximum for obtaining and value are being obtained
To sequence in corresponding call number, using the call number as time delay adjusted value.
18. methods as claimed in claim 13, it is characterised in that by the time delay determined adjusted value be sent to terminal it
Afterwards, also include：
Terminal determines whether to receive the time delay adjusted value according to preset rules；
If receiving the time delay adjusted value, the time of sending signal is adjusted according to the time delay adjusted value；
If not receiving the time delay adjusted value, it is determined whether beyond default reception duration, if it is, sending desynchronizing state letter
Number, conversely, continuing to time delay adjusted value.
19. a kind of time synchronism apparatus, it is characterised in that include：
Time delay bearer parameter values determining unit, in setting duration, it is determined that what is received is sent out in setting duration by terminal
The time delay bearer parameter values of the corresponding sign signal intensity of each reference signal come；
Confidence value determining unit, for the time delay bearer parameter values determined according to time delay bearer parameter values determining unit, really
The fixed confidence value for being used to weigh each time delay bearer parameter values accuracy；
Transmitting element, for the time delay bearer parameter values determined according to the time delay bearer parameter values determining unit and it is described can
The confidence value that certainty value determining unit is determined, determines time delay adjusted value and is sent to terminal, wherein, terminal according to it is described when
Prolonging adjusted value carries out time synchronized adjustment；
Wherein, the time delay bearer parameter values determining unit, specifically for will receive each reference signal for carrying out self terminal with
Default reference signal carries out related operation, obtains channel estimation sequence, using the channel estimation sequence as sending with terminal
The corresponding time delay bearer parameter values of each reference signal；Or by receive each reference signal for carrying out self terminal and default ginseng
Examining signal carries out related operation, in the channel estimation sequence that related operation is obtained, determines each in the channel estimation sequence
The performance number of element, using the performance number as time delay bearer parameter values corresponding with each reference signal that terminal is sent；Or
Each reference signal for carrying out self terminal for receiving is carried out into related operation with default reference signal, in the sequence that related operation is obtained
In row, the performance number of each element in the sequence is determined, it is determined that corresponding with maximum power value element position in the sequence
Call number, using the call number determined as time delay bearer parameter values corresponding with each reference signal that terminal is sent；
The confidence value includes absolute confidence angle value；
The confidence value determining unit, specifically for using following methods, being determined according to the channel estimation sequence and definitely may be used
Certainty value：
According to formulaDetermine absolute confidence angle value, wherein, SNRTHFor pre- in communication system
If signal-to-noise ratio, SIRmIt is the corresponding signal-to-noise ratio of channel estimation sequence；Or
According to formulaDetermine absolute confidence angle value, wherein αmIt is absolute confidence angle value, Cm
It is channel estimation sequence, max | Cm| it is to channel estimation sequence CmModulus of access simultaneously takes maximum therein, XTHIt is default
Credible threshold value corresponding with the channel estimation sequence, m be set duration in send reference signal number of times index.
20. devices as claimed in claim 19, it is characterised in that the confidence value includes relative reliability value；Credibility
Value determining unit, specifically for determining relative reliability value according to the channel estimation sequence；And/or it is true according to the performance number
Determine relative reliability value.
21. devices as claimed in claim 20, it is characterised in that the confidence value determining unit, specifically using following sides
Method, determines relative reliability value according to the channel estimation sequence：
According to formula βm=SIRmDetermine relative reliability value, wherein, βmIt is relative reliability value, SIRmIt is channel estimation sequence pair
The signal-to-noise ratio answered；Or
According to formula βm=max | Cm| determine relative reliability value, wherein βmIt is relative reliability value, CmIt is channel estimation sequence
Row, max | Cm| it is to channel estimation sequence CmModulus of access simultaneously takes maximum therein.
22. devices as claimed in claim 20, it is characterised in that the confidence value determining unit, specifically using following public affairs
Formula, determines relative reliability value according to the performance number：
βm=max | Cm|2}
Wherein, βmIt is relative reliability value, CmIt is channel estimation sequence, max | Cm|2It is to channel estimation sequence CmDelivery
Value square performance number for obtaining, and take the maximum in the performance number.
23. devices as claimed in claim 19, it is characterised in that the transmitting element, specifically for by determine each
Confidence value is sued for peace after being multiplied with time delay bearer parameter values, takes its meansigma methods, and the result for obtaining is used as time delay adjusted value；Or will
Each confidence value determined is sued for peace after being multiplied with time delay bearer parameter values, it is determined that the maximum for obtaining and value are in the sequence for obtaining
Corresponding call number in row, using the call number as time delay adjusted value.
24. a kind of time synchronism apparatus, it is characterised in that include：
Time delay bearer parameter values determining unit, in setting duration, it is determined that what is received is sent out in setting duration by terminal
The time delay bearer parameter values of the corresponding sign signal intensity of each reference signal come；
Confidence value determining unit, for the time delay bearer parameter values determined according to time delay bearer parameter values determining unit, really
The fixed confidence value for being used to weigh each time delay bearer parameter values accuracy；
Transmitting element, for the time delay bearer parameter values determined according to the time delay bearer parameter values determining unit and it is described can
The confidence value that certainty value determining unit is determined, determines time delay adjusted value and is sent to terminal, wherein, terminal according to it is described when
Prolonging adjusted value carries out time synchronized adjustment；
The confidence value determining unit, specifically for specifically adopting following methods, determines absolute confidence angle value according to performance number：
Wherein, αmIt is absolute confidence angle value, tTHIt is default threshold value, tmIt is performance number.
25. devices as claimed in claim 24, it is characterised in that the confidence value includes relative reliability value；Credibility
Value determining unit, specifically for determining relative reliability value according to channel estimation sequence；And/or phase is determined according to the performance number
To confidence value.
26. devices as claimed in claim 24, it is characterised in that the confidence value determining unit, specifically using following sides
Method, determines relative reliability value according to channel estimation sequence：
According to formula βm=SIRmDetermine relative reliability value, wherein, βmIt is relative reliability value, SIRmIt is channel estimation sequence pair
The signal-to-noise ratio answered；Or
According to formula βm=max | Cm| determine relative reliability value, wherein βmIt is relative reliability value, CmIt is channel estimation sequence
Row, max | Cm| it is to channel estimation sequence CmModulus of access simultaneously takes maximum therein.
27. devices as claimed in claim 24, it is characterised in that the confidence value determining unit, specifically using following public affairs
Formula, determines relative reliability value according to the performance number：
βm=max | Cm|2}
Wherein, βmIt is relative reliability value, CmIt is channel estimation sequence, max | Cm|2It is to channel estimation sequence CmDelivery
Value square performance number for obtaining, and take the maximum in the performance number.
28. devices as claimed in claim 23, it is characterised in that the transmitting element, specifically for by determine each
Confidence value is sued for peace after being multiplied with time delay bearer parameter values, takes its meansigma methods, and the result for obtaining is used as time delay adjusted value；Or will
Each confidence value determined is sued for peace after being multiplied with time delay bearer parameter values, it is determined that the maximum for obtaining and value are in the sequence for obtaining
Corresponding call number in row, using the call number as time delay adjusted value.
29. a kind of time synchronism apparatus, it is characterised in that include：
Time delay bearer parameter values determining unit, in setting duration, it is determined that what is received is sent out in setting duration by terminal
The time delay bearer parameter values of the corresponding sign signal intensity of each reference signal come；
Confidence value determining unit, for the time delay bearer parameter values determined according to time delay bearer parameter values determining unit, really
The fixed confidence value for being used to weigh each time delay bearer parameter values accuracy；
Transmitting element, for the time delay bearer parameter values determined according to the time delay bearer parameter values determining unit and it is described can
The confidence value that certainty value determining unit is determined, determines time delay adjusted value and is sent to terminal, wherein, terminal according to it is described when
Prolonging adjusted value carries out time synchronized adjustment；
The confidence value determining unit, specifically for specifically specifically adopting following formula using following methods, according to call number
Determine absolute confidence angle value：
Wherein, αmIt is absolute confidence angle value, tTHIt is default threshold value, N is the corresponding call number of maximum power value.
30. devices as claimed in claim 29, it is characterised in that the confidence value includes relative reliability value；Credibility
Value determining unit, specifically for determining relative reliability value according to channel estimation sequence；And/or phase is determined according to the performance number
To confidence value.
31. devices as claimed in claim 30, it is characterised in that the confidence value determining unit, specifically using following sides
Method, determines relative reliability value according to the channel estimation sequence：
According to formula βm=SIRmDetermine relative reliability value, wherein, βmIt is relative reliability value, SIRmIt is channel estimation sequence pair
The signal-to-noise ratio answered；Or
According to formula βm=max | Cm| determine relative reliability value, wherein βmIt is relative reliability value, CmIt is channel estimation sequence
Row, max | Cm| it is to channel estimation sequence CmModulus of access simultaneously takes maximum therein.
32. devices as claimed in claim 30, it is characterised in that the confidence value determining unit, specifically using following public affairs
Formula, determines relative reliability value according to the performance number：
βm=max | Cm|2}
Wherein, βmIt is relative reliability value, CmIt is channel estimation sequence, max | Cm|2It is to channel estimation sequence CmDelivery
Value square performance number for obtaining, and take the maximum in the performance number.
33. devices as claimed in claim 29, it is characterised in that the transmitting element, specifically for by determine each
Confidence value is sued for peace after being multiplied with time delay bearer parameter values, takes its meansigma methods, and the result for obtaining is used as time delay adjusted value；Or will
Each confidence value determined is sued for peace after being multiplied with time delay bearer parameter values, it is determined that the maximum for obtaining and value are in the sequence for obtaining
Corresponding call number in row, using the call number as time delay adjusted value.
34. a kind of clock synchronization systems, it is characterised in that include：
Base station, the base station include the arbitrary described time synchronism apparatus of claim 19～23；
Terminal, for determining whether to receive the time delay adjusted value according to preset rules；If receiving the time delay adjusted value,
The time of sending signal is adjusted according to the time delay adjusted value；If not receiving the time delay adjusted value, it is determined whether beyond pre-
If receiving duration, if it is, desynchronizing state signal is sent, conversely, continuing to time delay adjusted value.
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| CN201210255587.1A CN103582108B (en) | 2012-07-23 | 2012-07-23 | Method, device and system for synchronizing time |
| PCT/CN2013/000833 WO2014015649A1 (en) | 2012-07-23 | 2013-07-11 | Method, apparatus and system for time-synchronization |
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| CN201210255587.1A CN103582108B (en) | 2012-07-23 | 2012-07-23 | Method, device and system for synchronizing time |
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| CN113395779A (en) * | 2017-03-24 | 2021-09-14 | 中兴通讯股份有限公司 | Processing method and device for beam recovery |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1933361A (en) * | 2006-10-18 | 2007-03-21 | 普天信息技术研究院 | Up inserting detection method |
| CN102386957A (en) * | 2010-08-27 | 2012-03-21 | 中兴通讯股份有限公司 | Multiple-antenna combining method for uplink time advance and base station |
| CN102497347A (en) * | 2011-12-16 | 2012-06-13 | 北京北方烽火科技有限公司 | Time delay adjusting method and system for wireless communication system |
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| US8693447B2 (en) * | 2010-03-07 | 2014-04-08 | Telefonaktiebolaget L M Ericsson (Publ) | Processing resource optimization in communication systems |
| CN101925172B (en) * | 2010-07-20 | 2016-05-18 | 北京新岸线移动通信技术有限公司 | A kind of method for synchronizing time and device |
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| CN1933361A (en) * | 2006-10-18 | 2007-03-21 | 普天信息技术研究院 | Up inserting detection method |
| CN102386957A (en) * | 2010-08-27 | 2012-03-21 | 中兴通讯股份有限公司 | Multiple-antenna combining method for uplink time advance and base station |
| CN102497347A (en) * | 2011-12-16 | 2012-06-13 | 北京北方烽火科技有限公司 | Time delay adjusting method and system for wireless communication system |
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