CN101047434B - Time tag synchronous method, system and device - Google Patents
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Abstract
A method for synchronizing time countermark includes solving out relative time countermark of radio network controller from radio station relative time countermark labeled on basic data and difference of relative time countermark between radio base station and its radio network controller then solving out corresponding absolute time countermark according to relation of radio network controller relative time to absolute time. The system used for realizing said method is also disclosed.
Description
Technical field
The present invention relates to wireless communication technology, relate to a kind of time tag synchronous method, system, device particularly.
Background technology
In the process of construction of wireless network, need plan that propagation model is an important content in the network planning to network.Propagation model all can provide calibration function generally speaking, to guarantee that model can more meet current communication environments.For carrying out model tuning, at first must obtain basic propagation data.According to these basic propagation datas, proofread and correct propagation model by increasing means such as website, adjustment network parameter, cover thereby reach good wireless.
The continuous wave detection method is to obtain the universal means of basic propagation data.In order to raise the efficiency, adopt vehicle-mounted instrument constantly to launch continuous wave signal usually, gather continuous wave signal through the data behind the radio transmission model by the base station.Run through the overlay area of expectation when automobile after, just obtained the radio transmission model basic data.Then, carry out the associating data analysis, the propagation model that obtains proofreading and correct according to these basic datas and in conjunction with the data that transmit of vehicle-mounted instrument.
Obtain in the basic data process whole, if the time tag between each base station and the vehicle-mounted instrument is asynchronous, the basic data of obtaining will lose the meaning of Conjoint Analysis.Therefore each base station and vehicle-mounted instrument between time tag most important synchronously, it directly has influence on the accuracy of mode.The synchronization accuracy of time tag is high more, and error is low more, and propagation model is just accurate more.Usually, guarantee that the synchronous method of time tag has two kinds:
1, on each base station and vehicle-mounted instrument, all disposes global positioning system (Global Positioning System, GPS) receiver.Because base station number numerous (medium-sized city has individual even thousands of the base stations of hundreds of), this scheme cost is too high.
2, adopt network time server (Simple Network Time Protocol Server) to obtain synchronously.But this scheme synchronization accuracy is lower, and error can be up to level second, and because the restriction of server handling ability, along with the increase of NE quantity, error may further increase.
Summary of the invention
Embodiment of the invention technical problem to be solved is, a kind of time tag synchronous method is provided, and when reducing cost, also will keep the higher synchronous precision.
In order to solve the problems of the technologies described above, the embodiment of the invention has proposed a kind of time tag synchronous method, is used for carrying out comprising synchronously at the time tag of the process of setting up the wireless network propagation model to emission data and basic data:
A, after the Absolute Time Synchronization of vehicle-mounted instrument and radio network controller, begin to gather basic data;
B, receive the described basic data that the wireless base station reports, and obtain the relative time label of the wireless base station that marks on this basic data;
C, obtain the poor of the relative time label between the radio network controller under described wireless base station and its, and go out the relative time label of described radio network controller in conjunction with the relative time tag computation of described wireless base station;
D, obtain the relative time of described radio network controller and the corresponding informance of absolute time, and go out the absolute time label of corresponding described basic data according to the relative time tag computation of described radio network controller.
Correspondingly, the embodiment of the invention provides a kind of time tag synchronizer, is used for carrying out comprising synchronously at the time tag of the process of setting up the wireless network propagation model to emission data and basic data:
Information acquisition unit, be used for obtaining the relative time label of the wireless base station of the basic data that the wireless base station reports, and obtain this wireless base station and difference and the relative time of described radio network controller and the corresponding informance of absolute time of the relative time label of radio network controller under it;
First computing unit is used for the poor of the relative time label of the described wireless base station that obtains according to described information acquisition unit and described relative time label, calculates the relative time label corresponding to the radio network controller of described basic data;
Second computing unit is used for calculating the absolute time label of the described basic data of correspondence according to the relative time label of the described radio network controller of described first computing unit output and the relation of described relative time and absolute time.
The embodiment of the invention also provides a kind of time tag synchro system, is used for carrying out including synchronously at the time tag of the process of setting up the wireless network propagation model to emission data and basic data:
The Absolute Time Synchronization device lays respectively on vehicle-mounted instrument and the radio network controller, is used for the absolute time of synchronous vehicle-mounted instrument and radio network controller;
The relative time time set, lay respectively at described radio network controller and have jurisdiction on each wireless base station, be used for the relative time of described radio network controller and described wireless base station is carried out timing, provide the relative time label of wireless base station with the basic data that reports to the wireless base station, and be used to provide the corresponding informance of described relative time and absolute time;
Relative time difference calculation element, be used for obtaining the relative time information of described radio network controller and each wireless base station of having jurisdiction over thereof, calculate and store described radio network controller and its and have jurisdiction over the poor of relative time label between each wireless base station from the relative time time set;
The time tag synchronizer, be used for the relative time label according to described wireless base station, described wireless base station with its under the difference of relative time label of radio network controller calculate the relative time label of corresponding described radio network controller, the absolute time label that obtains described basic data in conjunction with the relative time and the corresponding informance between the absolute time of described radio network controller again.
Compare with prior art, embodiment provided by the invention has following beneficial effect:
A kind of time tag synchronous method, system and device that the embodiment of the invention provides, by the relative time label of the wireless base station that marks on the basic data and wireless base station and under it difference of the relative time label between the radio network controller obtain the relative time label of radio network controller, and then obtain corresponding absolute time label with the relation of absolute time according to the relative time of radio network controller.These method, system and device only need guarantee the absolute time precision of radio network controller, promptly only need on vehicle-mounted instrument and radio network controller, to install the Absolute Time Synchronization device, and need on each base station, not install respectively, under the less situation of the mistake difference of the relative time label of wireless base station and radio network controller, can realize that the time tag between vehicle-mounted instrument and each wireless base station is synchronous.Therefore, a kind of time tag synchronous method, system and device by the embodiment of the invention provides greatly reduce network cost, have higher time tag synchronization accuracy simultaneously again, and, also reduced the cost of network operation owing to used less Absolute Time Synchronization equipment.
Description of drawings
Fig. 1 is the composition schematic diagram of an embodiment of time tag synchro system of the present invention;
Fig. 2 is that the construction module of an embodiment of time tag synchronizer of the present invention is formed schematic diagram;
Fig. 3 is that the functional module of an embodiment of second computing unit among the present invention is formed schematic diagram;
Fig. 4 is the schematic flow sheet of an embodiment of time tag synchronous method of the present invention;
Fig. 5 is the schematic flow sheet of the embodiment of step S404 among Fig. 4;
Fig. 6 is the schematic flow sheet of the embodiment of step S503 among Fig. 5.
Embodiment
Below in conjunction with accompanying drawing the present invention is done further in detail clearly explanation.
Fig. 1 shows the composition schematic diagram of an embodiment of time tag synchro system of the present invention, include be installed in vehicle-mounted instrument and radio network controller (Radio Network Controller, RNC) the Absolute Time Synchronization device 1 on, be installed in RNC and have jurisdiction over relative time time set 2 on each wireless base station, relative time difference calculation element 3, the information of obtaining from RNC and each wireless base station is gone forward side by side the synchronous time tag synchronizer 4 of line time label.
Described Absolute Time Synchronization device 1 is used for before gathering basic data the absolute time of vehicle-mounted instrument and RNC being carried out synchronously, thereby the absolute time label that guarantees RNC is accurate with respect to vehicle-mounted instrument, and it is synchronous promptly launching the absolute time label of data and the absolute time label of RNC.
Described relative time time set 2, be used for respectively the relative time of RNC and each wireless base station of having jurisdiction over thereof is carried out timing, relation between this relative time and the absolute time is by relative time set and to its decision that is provided with, in case selected certain relative time time set and it is provided with, the corresponding informance of relative time and absolute time has also just been determined.Described corresponding informance is the conversion relation between relative time and absolute time.Corresponding informance according to this relative time and absolute time can be obtained corresponding absolute time label by the relative time label, or obtains corresponding relative time label by the absolute time label.As a kind of execution mode, the corresponding informance of relative time and absolute time can be the one-to-one relationship table of relative time and absolute time, can obtain corresponding absolute time label by the relative time label by inquiring about this table, or obtain corresponding relative time label by the absolute time label.As another kind of execution mode, described corresponding informance also can be count cycle, gate time cycle of the pairing absolute time value of initial value of relative time set and relative time set etc., after having known a certain clocking value of relative time set, according to information calculations such as described count cycle, gate time cycle go out between it and initial value absolute time at interval, and then add the pairing absolute time value of initial value, can obtain the pairing absolute time value of this clocking value.
Described relative time difference calculation element 3 is used to obtain the relative time information of RNC and each wireless base station of having jurisdiction over thereof, and has jurisdiction over the poor of relative time label between each wireless base station thereby calculate RNC and its, and stores.
When reporting the basic data that collects, the wireless base station with the relative time label for labelling of relative time time set 2 record in this basic data.When receiving this basic data and it analyzed, come out by the relative time label peeling of time tag synchronizer 4 described wireless base station, and obtain the wireless base station that reports this basic data and the relative time label between RNC poor under it, thereby obtain the relative time label of corresponding RNC from relative time difference calculation element 3; Then, time tag synchronizer 4 obtains and the corresponding absolute time label of the relative time label of RNC again according to the corresponding informance of relative time and absolute time,, has obtained the absolute time label of this basic data that is.All take identical mode to obtain corresponding absolute time label to each basic data that each wireless base station reports.Because the absolute time label of RNC and the absolute time label of vehicle-mounted instrument are synchronous, so the absolute time label of the emission data of the absolute time label of the basic data that is obtained by the embodiment of above-mentioned time tag synchro system and vehicle-mounted instrument also is synchronous.As long as the relative time label difference that relative time difference calculation element 3 calculates keeps less error, the synchronous of absolute time label just can keep higher precision, and, keep the less error of relative time label difference to realize than being easier to for prior art.
To sum up, the embodiment of time tag synchro system of the present invention only installs the Absolute Time Synchronization device on vehicle-mounted instrument and RNC just can realize that time tag is synchronous, has both reduced network cost, has kept the higher synchronous precision again.
As a kind of execution mode, the Absolute Time Synchronization device in the time tag synchro system of the present invention can be GPS receiver or network time server; The relative time time set can be global, and then the difference of relative time label is the frame timing difference, can be obtained by RNC synchronously by node.
Fig. 2 is that the construction module of an embodiment of time tag synchronizer 4 is formed schematic diagram, includes information acquisition unit 41, first computing unit 42 and second computing unit 43.
Described information acquisition unit 41 is obtained the relative time label of this wireless base station from the basic data that the wireless base station reports, obtain described wireless base station and relative time label poor of radio network controller under it from described relative time difference calculation element 3, obtain the corresponding informance of its relative time and absolute time from the relative time time set 2 of described radio network controller.
The relative time label of the described wireless base station that described first computing unit 42 obtains according to described information acquisition unit 41 and described relative time label poor, calculate relative time label, and this result of calculation is transferred to second computing unit 43 corresponding to the radio network controller of described basic data.
Described second computing unit 43 calculates the absolute time label of corresponding described basic data according to the relative time label of described radio network controller and the corresponding informance of described relative time and absolute time.
As a kind of execution mode, when the relative time time set was global, described relative time label was a global gate time label, that is, and and corresponding to the count value of the global of described basic data; The difference of described relative time label refers to that the frame timing between described wireless base station and its affiliated radio network controller is poor; Corresponding informance between described relative time and the absolute time can comprise: the count cycle of the global of described radio network controller, gate time cycle, gate time interval, initial value and the pairing absolute time value of initial value thereof.The relative time label of supposing described wireless base station is t
BS, the relative time label of described radio network controller is t
RNCThe count range of supposing global is 0～N-1, and gate time is spaced apart Δ T, and initial value is t
0, then its count cycle is N, its gate time cycle is T
N=Δ T * (N-1).So, after node was synchronous, information acquisition unit 41 can directly get access to the poor of described relative time label from radio network controller, i.e. frame timing difference t
RNC-BS, it and t
BSAnd t
RNCThe pass be: t
RNC-BS=t
RNC-t
BSGenerally, the clock stability of RNC and wireless base station is very high, and RNC and wireless base station can regularly carry out node (synchronization accuracy can reach 0.125 millisecond) synchronously, therefore frame timing difference is relatively fixing, and precision is higher, error lower (a few tens of milliseconds level, depend on transmission quality).In addition, information acquisition unit 41 is also obtained the relative time label t of the wireless base station in the basic data that reports
BS, reach count cycle N, the gate time period T of obtaining its global the radio network controller under this wireless base station
N, gate time interval delta T, initial value t
0And the pairing absolute time value of initial value.First computing unit 42 adds the relative time label of wireless base station with this frame timing difference, just obtains the relative time label of radio network controller, i.e. t
RNC=t
RNC-BS+ t
BSAt this moment, for calculating accurate absolute time label, the wireless base station is when reporting basic data, not only mark the relative time label, also mark himself absolute time label without overcorrect, the absolute time label of this absolute time label and vehicle-mounted instrument is not synchronous, needs to proofread and correct.Correspondingly, information acquisition unit 41 in the present embodiment also includes the absolute time acquiring unit, is used for obtaining absolute time label without the wireless base station of overcorrect from basic data.
Fig. 3 shows the functional module of second computing unit 43 when the relative time time set is global and forms schematic diagram, includes error calculation unit 432 and absolute time computing unit 433 in cycle level error calculation unit 431, cycle.
Relative time that obtains by information acquisition unit 41 and the corresponding informance between the absolute time, can know the pairing absolute time value of initial value of the global of radio network controller, and we have also been obtained the gate time label t of this global now by first computing unit 41
RNC, promptly, so,, add the absolute time value of initial value correspondence as long as obtain between this count value and the initial value to have passed through how many absolute times corresponding to the count value of basic data, just can obtain the absolute time value of basic data correspondence.Because global is a cycle count, so the time error between described count value and the initial value be divided into the cycle level again with the cycle in, error calculation unit 432 is respectively applied for and calculates these two time errors in cycle level error calculation unit 431 and cycle.
The absolute time label of the pairing absolute time value of gate time cycle, its initial value of the global of the described radio network controller that cycle level error calculation unit 431 is obtained according to described information acquisition unit 41, described not calibrated wireless base station, calculate described absolute time value and proofread and correct after the absolute time label between the time error of count cycle level.The pairing absolute time value of the initial value of the global of assumed wireless network controller is T
GPS-RNC, the absolute time label of not calibrated wireless base station is T
BS, the time error of then described cycle level
The absolute time label of promptly not calibrated wireless base station is T
BSDeduct described absolute time value T
GPS-RNCAfter again divided by described gate time period T
N, round then, and then multiply by the gate time period T
N
As a kind of execution mode, for calculating T
2 Error calculation unit 432 also includes judging unit 4321 in cycle, be used to judge that whether the global gate time label value of described radio network controller is less than its initial value, if judged result is for being then error calculation unit in the described cycle is issued first computations, otherwise, it is issued second computations.After error calculation unit 432 receives described first computations in cycle, multiply by its gate time spacing value again after the global gate time label value of described radio network controller added its count cycle and deduct its initial value, obtain the time error in the described count cycle; After receiving described second computations, multiply by its gate time spacing value after the global gate time label value of described radio network controller deducted its initial value, obtain the time error in the described count cycle.That is:
Work as t
RNC〉=t
0The time, T
2=(t
RNC-t
0) * Δ T; Work as t
RNC＜t
0The time, T
2=(t
RNC+ N-t
0) * Δ T.
Absolute time computing unit 433 is according to the time error T of described count cycle level
1, the time error T in a described count cycle
2And the pairing absolute time value of the global initial value T of described radio network controller
GPS-RNC, calculate the absolute time label T of described basic data
GPS, i.e. T
GPS=T
GPS-RNC+ T
1+ T
2
Here need to prove, in embodiments of the present invention, need be with the absolute time ERROR CONTROL of wireless base station and radio network controller at a gate time in the cycle.Usually, the gate time cycle of global is about 40s, as long as the absolute time precision of wireless base station is in this scope, can obtain the high-precise synchronization of the time tag of vehicle-mounted instrument and each wireless base station by the embodiment of the invention, synchronization accuracy can reach ± 10ms (depending primarily on the node synchronous error between RNC and the wireless base station).
Correspondingly, the invention provides a kind of time tag synchronous method, be used for carrying out synchronously at the time tag of the process of setting up the wireless network propagation model to emission data and basic data, the schematic flow sheet of an one embodiment may further comprise the steps as shown in Figure 4:
Step S401: after the Absolute Time Synchronization of vehicle-mounted instrument and radio network controller, begin to gather basic data.
Before gathering basic data, must earlier the absolute time of vehicle-mounted instrument and RNC be carried out synchronously, be synchronous with the absolute time label that guarantees emission data and RNC.After the Absolute Time Synchronization, vehicle-mounted instrument emission continuous wave signal, the wireless base station receives this signal and reports basic data.
Step S402: receive the described basic data that the wireless base station reports, and obtain the relative time label of the wireless base station that marks on this basic data.
Step S403: obtain the poor of the relative time label between the radio network controller under described wireless base station and its, and go out the relative time label of described radio network controller in conjunction with the relative time tag computation of described wireless base station.
The relative time of wireless base station and radio network controller is provided by the relative time time set, in case selected certain relative time time set and it is provided with, the corresponding informance of relative time and absolute time has also just been determined.Corresponding informance according to this relative time and absolute time can be obtained corresponding absolute time label by the relative time label, or obtains corresponding relative time label by the absolute time label.
Step S404: obtain the relative time of described radio network controller and the corresponding informance of absolute time, and go out the absolute time label of corresponding described basic data according to the relative time tag computation of described radio network controller.Because RNC is synchronous with the absolute time label of emission data, then the absolute time label of the basic data that obtains by said method is synchronous with the absolute time label of emission data.
Other all basic data repeating step S402 that each wireless base station is reported are to the action of step S404, and the absolute time label that can realize launching data and basic data is synchronous, and the absolute time label between each basic data is synchronous.
In embodiments of the present invention, as long as keep the absolute time label of vehicle-mounted instrument and RNC synchronous, can try to achieve corresponding absolute time label step by step by the relative time label of wireless base station.When the precision of the relative time difference between wireless base station and radio network controller was higher, the absolute time label that can obtain degree of precision was synchronous.The relative time difference that obtains degree of precision more easily realizes in the prior art.
Therefore,, both networking and maintenance cost can be reduced, the higher synchronous precision can be kept again by the embodiment of time tag synchronous method of the present invention.
As a kind of execution mode, can select global as the relative time time set, then:
Described relative time label refers to global gate time label, promptly corresponding to the count value of the global of described basic data;
The difference of described relative time label refers to that the frame timing between described wireless base station and its affiliated radio network controller is poor, and it can obtain synchronously by the node between radio network controller and wireless base station;
Corresponding informance between described relative time and the absolute time comprises: the count cycle of the global of described radio network controller, gate time cycle, gate time interval, initial value and the pairing absolute time value of initial value thereof.
The relative time label of supposing described wireless base station is t
BS, the relative time label of described radio network controller is t
RNCThe count range of supposing global is 0～N-1, and gate time is spaced apart Δ T, and initial value is t
0, then its count cycle is N, its gate time cycle is T
N=Δ T * (N-1).
In above-mentioned two embodiment, step S403 specifically comprises:
Step S4031: the radio network controller under the described wireless base station obtains described relative time label poor of the two.In one embodiment of back, the difference of described relative time label is frame timing difference t
RNC-BS, it and t
BSAnd t
RNCThe pass be: t
RNC-BS=t
RNC-t
BSGenerally, the clock stability of RNC and wireless base station is very high, and RNC and wireless base station can regularly carry out node (synchronization accuracy can reach 0.125 millisecond) synchronously, therefore frame timing difference is relatively fixing, and precision is higher, error lower (a few tens of milliseconds level, depend on transmission quality).
Step S4032: the difference of described time tag is added the relative time label of the above wireless base station, obtain the relative time label of corresponding described radio network controller.In one embodiment of back, the relative time label t of described radio network controller
RNC=t
RNC-BS+ t
BS
Because what provide in the corresponding informance between described relative time and the absolute time is the pairing absolute time value of global initial value, for calculating the absolute time label of basic data, also need to know the absolute time label of the wireless base station before proofreading and correct, therefore, the wireless base station is when reporting basic data, not only mark described relative time label, also to mark himself absolute time label without overcorrect, correspondingly, described step S402 also comprises: the absolute time label that obtains this not calibrated wireless base station from described basic data.
Fig. 5 shows the schematic flow sheet of the embodiment of step S404 in the present embodiment, comprising:
Step S501: count cycle, gate time cycle, gate time interval, initial value and the pairing absolute time value of initial value thereof of inquiring about and obtain the global of described radio network controller.
By the corresponding informance between relative time that obtains and the absolute time, can know the pairing absolute time value of initial value of the global of radio network controller, and we have also been obtained the gate time label t of this global now by step S4032
RNC, promptly, so,, add the absolute time value of initial value correspondence as long as obtain between this count value and the initial value to have passed through how many absolute times corresponding to the count value of basic data, just can obtain the absolute time value of basic data correspondence.Because global is a cycle count, so the time error between described count value and the initial value is divided into the time error T of cycle level again
1With the time error T in the cycle
2, step S502 and step S503 are respectively applied for and calculate these two time errors.
Step S502: according to the absolute time label of described gate time cycle, described absolute time value and described not calibrated wireless base station, calculate described absolute time value and proofread and correct after the absolute time label between the time error of count cycle level.
The pairing absolute time value of the initial value of the global of assumed wireless network controller is T
GPS-RNC, the absolute time label of not calibrated wireless base station is T
BS, the time error of then described cycle level
The absolute time label of promptly not calibrated wireless base station is T
BSDeduct described absolute time value T
GPS-RNCAfter again divided by described gate time period T
N, round then, and then multiply by the gate time period T
N
Step S503: according to count cycle N, gate time interval delta T, the initial value t of the global of described radio network controller
0And gate time label t
RNC, the time error T of absolute time label in a count cycle after calculating described absolute time value and proofreading and correct
2
Step S504:, calculate the absolute time label T after the correction corresponding to described basic data according to the time error and the time error in the described count cycle of described absolute time value, described cycle level
GPS, i.e. T
GPS=T
GPS-RNC+ T
1+ T
2
Fig. 6 shows the schematic flow sheet of the embodiment of step S503, comprising:
Step S601: the global gate time label value t that judges described radio network controller
RNCWhether less than its initial value t
0If judged result is for being then execution in step S602, otherwise, execution in step S603;
Step S602: with the global gate time label value t of described radio network controller
RNCAdd its count cycle N and deduct its initial value t
0After multiply by its gate time spacing value Δ T, obtain the time error T in a described count cycle
2
Step S603: multiply by its gate time spacing value after the global gate time label value of described radio network controller deducted its initial value, obtain the time error T in the described count cycle
2
That is:
Work as t
RNC〉=t
0The time, T
2=(t
RNC-t
0) * Δ T; Work as t
RNC＜t
0The time, T
2=(t
RNC+ N-t
0) * Δ T.
Here need to prove, in embodiments of the present invention, need be with the absolute time ERROR CONTROL of wireless base station and radio network controller at a gate time in the cycle.Usually, the gate time cycle of global is about 40s, as long as the absolute time precision of wireless base station is in this scope, can obtain the high-precise synchronization of the time tag of vehicle-mounted instrument and each wireless base station by the embodiment of the invention, synchronization accuracy can reach ± 10ms (depending primarily on the node synchronous error between RNC and the wireless base station).
Therefore, by the embodiment of time tag synchronous method of the present invention, not only improved greatly the network time label precision, greatly reduce the synchronous error of network time label, the construction of network and maintenance cost are reduced greatly.Absolute Time Synchronization between the network element is required also to reduce greatly.
Above disclosed only is preferred embodiment of the present invention, can not limit the present invention's interest field certainly with this, and therefore the equivalent variations of doing according to claim of the present invention still belongs to the scope that the present invention is contained.
Claims (8)
1. a time tag synchronous method is used for carrying out it is characterized in that synchronously at the time tag of the process of setting up the wireless network propagation model to emission data and basic data, comprising:
A, after the Absolute Time Synchronization of vehicle-mounted instrument and radio network controller, begin to gather basic data;
B, receive the described basic data that the wireless base station reports, and obtain the global gate time label of the wireless base station that marks on this basic data and from described basic data, obtain the absolute time label of this not calibrated wireless base station;
C, to obtain under described wireless base station and its frame timing between radio network controller poor, and go out the global gate time label of described radio network controller in conjunction with the global gate time tag computation of described wireless base station;
D1, the count cycle of inquiring about and obtaining the global of described radio network controller, gate time cycle, gate time interval, initial value and the pairing absolute time value of initial value thereof;
D2, according to the absolute time label of described gate time cycle, described absolute time value and described not calibrated wireless base station, calculate described absolute time value and proofread and correct after the absolute time label between the time error of count cycle level;
D3, according to count cycle of the global of described radio network controller, gate time at interval, initial value and gate time label thereof, the time error of absolute time label in a count cycle after calculating described absolute time value and proofreading and correct;
D4, according to the time error and the time error in the described count cycle of described absolute time value, described cycle level, calculate the absolute time label after the correction corresponding to described basic data.
2. time tag synchronous method as claimed in claim 1 is characterized in that, described step C specifically comprises:
C1, the radio network controller under the described wireless base station obtain relative time label poor of the two;
C2, the difference of described relative time label is added the relative time label of the above wireless base station, obtain the relative time label of corresponding described radio network controller;
Described relative time label refers to global gate time label;
The difference of described relative time label refers to that the frame timing between described wireless base station and its affiliated radio network controller is poor.
3. time tag synchronous method as claimed in claim 1, it is characterized in that, described step D2 is specially: the absolute time label with described not calibrated wireless base station deducts described absolute time value, gate time week after date divided by described global rounds again, the periodicity that the absolute time label after obtaining described absolute time value and proofreading and correct differs; And then multiply by the described gate time cycle, obtain the time error of described count cycle level.
4. time tag synchronous method as claimed in claim 1 is characterized in that, described step D3 comprises:
D31, judge described radio network controller global gate time label value whether less than its initial value, if judged result for being then execution in step D32, otherwise, execution in step D33;
D32, multiply by its gate time spacing value after the global gate time label value of described radio network controller added its count cycle and deduct its initial value, obtain the time error in the described count cycle;
D33, multiply by its gate time spacing value after the global gate time label value of described radio network controller deducted its initial value, obtain the time error in the described count cycle.
5. as each described time tag synchronous method of claim 1 to 4, it is characterized in that, described step D4 is specially: the time error that adds the above cycle level with described absolute time value, add the time error in the described count cycle, the absolute time label after obtaining proofreading and correct corresponding to described basic data.
6. a time tag synchronizer is used for carrying out it is characterized in that synchronously at the time tag of the process of setting up the wireless network propagation model to emission data and basic data, comprising:
Information acquisition unit, be used for obtaining the absolute time label of not calibrated wireless base station of the basic data that the wireless base station reports and the global gate time label of wireless base station, and obtaining frame timing difference and the relative time of described radio network controller and the corresponding informance of absolute time of radio network controller under this wireless base station and its, the corresponding informance between described relative time and the absolute time comprises: the count cycle of the global of described radio network controller, the gate time cycle, gate time at interval, the pairing absolute time value of initial value and initial value thereof;
First computing unit, be used for the poor of the global gate time label of the described wireless base station that obtains according to described information acquisition unit and described global gate time label, calculate global gate time label corresponding to the radio network controller of described basic data;
Second computing unit is used for calculating the absolute time label of the described basic data of correspondence according to the relative time label of the described radio network controller of described first computing unit output and the relation of described relative time and absolute time;
Wherein, described second computing unit specifically comprises:
Cycle level error calculation unit, be used for the pairing absolute time value of gate time cycle, its initial value of the global of the described radio network controller that obtains according to described information acquisition unit, the absolute time label of described not calibrated wireless base station, calculate described absolute time value and proofread and correct after described absolute time label between the time error of count cycle level;
Error calculation unit in cycle, the count cycle, gate time that is used for the global gate time label according to the described radio network controller of described first computing unit output, described global that described information acquisition unit is obtained at interval and initial value, interior time error of count cycle between the described absolute time label after calculating described absolute time value and proofreading and correct;
The absolute time computing unit, the pairing absolute time value of global initial value that is used for time error, the time error in the described count cycle and described radio network controller according to described count cycle level calculates the absolute time label of described basic data.
7. time tag synchronizer as claimed in claim 6 is characterized in that, error calculation unit includes in the described cycle:
Judging unit, be used to judge that whether the global gate time label value of described radio network controller is less than its initial value, if judged result is for being then error calculation unit in the described cycle is issued first computations, otherwise, it is issued second computations.
8. time tag synchronizer as claimed in claim 7, it is characterized in that, after error calculation unit receives described first computations in the described cycle, multiply by its gate time spacing value again after the global gate time label value of described radio network controller added its count cycle and deduct its initial value, obtain the time error in the described count cycle;
After difference computational unit receives described second computations, multiply by its gate time spacing value after the global gate time label value of described radio network controller deducted its initial value, obtain the time error in the described count cycle.
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| CN101753585B (en) * | 2010-01-08 | 2012-05-23 | 清华大学 | Communication method for service data borne with time stamp |
| US8984168B2 (en) | 2011-03-31 | 2015-03-17 | Microsoft Technology Licensing, Llc | Relative timestamp when real time clock is unavailable |
| KR101751798B1 (en) * | 2011-10-04 | 2017-07-11 | 현대모비스 주식회사 | Method correcting time error when Cluster for Hybrid vehicle and AVN System Display Data |
| CN102809961B (en) * | 2012-08-27 | 2014-09-17 | 中国科学院国家天文台南京天文光学技术研究所 | Solution for time varying and time slag problems of telescope control system |
| CN103065491B (en) * | 2012-12-03 | 2016-04-20 | 董笑宇 | Waiting system is exempted from a kind of bus location, small and medium-sized cities based on GPS |
| CN106251396B (en) * | 2016-07-29 | 2021-08-13 | 迈吉客科技（北京）有限公司 | Real-time control method and system for three-dimensional model |
| CN106658712B (en) * | 2017-01-17 | 2020-11-10 | 深圳市亿兆互联技术有限公司 | Communication terminal positioning method and system |
| CN108445279B (en) * | 2018-02-12 | 2020-01-17 | 北京和信瑞通电力技术股份有限公司 | Synchronous sampling method based on short-frequency wireless in transient recording type fault indicator |
| CN110224779B (en) * | 2019-06-21 | 2021-03-09 | 北京东土军悦科技有限公司 | Method, device, equipment and medium for calculating absolute time of equipment for receiving and sending message |
| CN110380825B (en) * | 2019-07-29 | 2022-05-10 | 网宿科技股份有限公司 | Transmission rate control method and device |
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