CN102149186A - Null interface synchronization method and equipment of time division system - Google Patents
Null interface synchronization method and equipment of time division system Download PDFInfo
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- CN102149186A CN102149186A CN201010111228XA CN201010111228A CN102149186A CN 102149186 A CN102149186 A CN 102149186A CN 201010111228X A CN201010111228X A CN 201010111228XA CN 201010111228 A CN201010111228 A CN 201010111228A CN 102149186 A CN102149186 A CN 102149186A
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Abstract
The invention relates to the technical field of communication and discloses a null interface synchronization method and null interface synchronization equipment of a time division system. The method comprises the following steps of: judging whether a base station fails out of step according to observation time difference between single frequency networks (SFN) of two cells in measurement reports transmitted by terminals in the two neighbor cells; and synchronizing the out-of-step base station if the base station fails out of step. By the method, the out-of-step base station caused by slow drift of a clock reference source can be detected, so that the null interface synchronization of a system is realized.
Description
Technical field
The present invention relates to the communication technology, be specifically related to a kind of time-division system air interface synchronization method and equipment.
Background technology
TD-SCDMA (Time Division-Synchronous Code Division Multiple Access, the code division multiple access that the time-division is synchronous) system is a synchro system, and all base stations must adopt identical clock source to carry out synchronously.If the clock source of a certain base station drifts about, can cause this base station step-out, thereby can bring the frequency step-out of eating dishes without rice or wine and the time step-out of base station and terminal equipment.Asynchronism(-nization) is during the step between the base station, and the interference that brings mainly contains two aspects:
1. base station side: the interference between the uplink and downlink time slot between the adjacent base station (DWpts, UPpts, up working time slot, downlink working time slot);
2. end side: the interference between the uplink and downlink time slot between the terminal under the adjacent base station (DWpts, UPpts, up working time slot, downlink working time slot).
Given this, how base station step-out is detected, take which kind of measure to carry out the difficult problem that clock alignment is the TD-SCDMA systems face after detecting step-out.
At present, the TD-SCDMA system base-station is to produce the needed high-performance clock demand of base station system by following the tracks of timing reference input, the system-timing reference source of being adopted is GPS (Global PositioningSystem, global positioning system) Timing Receiver, the means of detection of loss of mains mainly contain the alarm of clock source device itself and the detection alarm of base station equipment synchronization module, if promptly the satellite Timing Receiver is unavailable, alarm will appear, alarm mainly contains two kinds: the alarm of a kind of GPS of being Timing Receiver self output, as antenna open circuit, short circuit etc.; A kind of is that the base station clock synchronization module detects the 1pps clock performance that is input to the base station and can't use and alarm.Technology such as the method for clock alignment adopts that mainly the backup clock source is switched.
Lose for reference source, shake problems such as excessive or big frequency deviation, the base station can be carried out the availability judgement by the clock of this locality, but the base station step-out that slow drift causes for timing reference input, clock source and base station equipment can't detect, thereby also just can not carry out clock alignment to the base station.
Summary of the invention
The embodiment of the invention provides a kind of time-division system air interface synchronization method and equipment.
On the one hand, a kind of time-division system air interface synchronization method of the embodiment of the invention comprises:
Two minizone SFN observed time differences according in the measurement report of the terminal to report in the neighbor cell have determined whether that step-out appears in the base station;
If there is the base station step-out to occur, then the base station of step-out is carried out synchronously.
On the other hand, the embodiment of the invention provides a kind of radio network controller, comprising:
The measurement report receiving element is used for the measurement report of the terminal to report in the reception of neighboring cell;
Detecting unit is used for two minizone SFN observed time differences according to the measurement report of the terminal to report in the neighbor cell, has determined whether that step-out appears in the base station;
Lock unit is used for after described detecting unit has detected the base station and step-out occurs the base station of described step-out being carried out synchronously.
Time-division system air interface synchronization method and equipment that the embodiment of the invention provides, according to (the System Frame Number of SFN between the different districts in the measurement report of a plurality of terminal to report in the neighbor cell, System Frame Number) observed time difference carries out cascading judgement, determine the base station of step-out and the base station of step-out not, thereby can to base station step-out for example the clock source slowly the base station step-out that causes of drift detect effectively, and then the base station of step-out carried out synchronously, realize the time-division system air interface synchronization, ensured the operate as normal of base station.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the flow chart of embodiment of the invention time-division system air interface synchronization method;
Fig. 2 is a neighbor cell schematic diagram in the embodiment of the invention;
Fig. 3 is a kind of structural representation of embodiment of the invention radio network controller;
Fig. 4 is the another kind of structural representation of embodiment of the invention radio network controller.
Embodiment
In order to make those skilled in the art person understand the scheme of the embodiment of the invention better, the embodiment of the invention is described in further detail below in conjunction with drawings and embodiments.
In time-division system, terminal is being carried out the sub-district when switching or according to the notice of network side, measures and to the network side reporting measurement reports, wherein comprises the deviate between the SFN that different districts arrives this terminal.Such as, terminal is in the sub-district 1, and the neighbor cell of sub-district 1 comprises: sub-district 2, sub-district 3 then comprise the deviate of the SFN between sub-district 1 and the sub-district 2 in the measurement report of this terminal to report, be designated as the deviate of the SFN between SFN1-SFN2 and sub-district 1 and the sub-district 3, be designated as SFN1-SFN3.For this reason, time-division system air interface synchronization method and equipment that the embodiment of the invention provides, carry out cascading judgement according to two minizone SFN observed time differences (SFN-SFN OTD) in the measurement report of a plurality of terminal to report in the neighbor cell, determine the base station of step-out and the base station of step-out not; Carry out synchronously base station to step-out.
As shown in Figure 1, be the flow chart of embodiment of the invention time-division system air interface synchronization method, may further comprise the steps:
Particularly, can may further comprise the steps:
(1) notifies the first terminal to report measurement report in described a plurality of terminal, particularly, can regularly notify the described first terminal to report measurement report.
(2) if first sub-district and the second minizone SFN observed time difference surpass the first predetermined threshold value in the measurement report of described first terminal to report, then the other-end that is in connection status in sub-district, the described first terminal place and with sub-district, described first terminal place neighbor cell in the formed combination of the terminal that is in connection status in a plurality of terminals initiate to measure control messages.
(3) measurement report of a plurality of terminal to report in the described combination of reception.
(4), determine that then step-out appears in base station in first sub-district or the base station in second sub-district if the ratio that first sub-district and the second minizone SFN observed time difference surpass described first thresholding in the measurement report that receives surpasses predetermined proportion threshold value.
For the said process detailed description of will giving an example in the back.
Particularly, the base station of step-out is being carried out when synchronous, can whether have the backup reference source to decide the method for synchronization according to the base station of described step-out.Such as, there is the backup reference source base station of described step-out, and the base station of the described step-out of then preferential indication switches to described backup reference source with local clock; Otherwise, can with the base station of step-out and not the SFN-SFN OTD between the base station of step-out send to the base station of described step-out so that clock alignment is carried out according to the SFN-SFN OTD that receives in the base station of described step-out.Such as, if the base station step-out in first sub-district, and do not back up reference source, then calculate the average of first sub-district and the second minizone SFN observed time difference in the measurement report of the terminal to report in other sub-districts adjacent with first sub-district, and this average sent to base station in first sub-district, so that clock alignment is carried out according to the average that receives in the base station in first sub-district; If the perhaps base station step-out in second sub-district, and do not back up reference source, then calculate the average of first sub-district and the second minizone SFN observed time difference in the measurement report of the terminal to report in other sub-districts adjacent with second sub-district, and this average sent to base station in second sub-district, so that clock alignment is carried out according to the average that receives in the base station in second sub-district.
The base station is carried out in the concrete calibration process of clock alignment and the prior art similar, is not described in detail at this.
Certainly, in the method for the embodiment of the invention synchronous process is carried out in the base station of step-out and be not limited in above-mentioned this mode, such as, can preferably make the base station of described step-out carry out clock alignment according to the SFN-SFN OTD that receives.
In embodiments of the present invention, the base station of step-out is carried out when synchronous, which base station at first will determine specifically has be in desynchronizing state, that is to say, determines the base station of step-out and the base station of step-out not, then clock alignment is carried out in the base station of step-out.Particularly, can be by the average of first sub-district and the second minizone SFN observed time difference in the measurement report that calculates a plurality of terminal to report in the described combination, and the average of SFN observed time difference between average, second sub-district and other neighbor cells except that first sub-district of SFN observed time difference between first sub-district and other neighbor cells except that second sub-district; If the average of first sub-district and the second minizone SFN observed time difference surpasses second threshold value, and the average of first sub-district and other minizones SFN observed time difference except that second sub-district surpasses described second threshold value, then determine the base station step-out in second sub-district, the base station in first sub-district is step-out not; If perhaps the average of first sub-district and the second minizone SFN observed time difference surpasses second threshold value, and the average of second sub-district and other minizones SFN observed time difference except that first sub-district surpasses described second threshold value, then determine the base station step-out of first sub-district, the base station in second sub-district is step-out not.Detailed process will illustrate in the back.
Further describe embodiment of the invention time-division system air interface synchronization method below for example.
As shown in Figure 2, have three sub-district: Cell1, Cell2, Cell3, the UE that wherein is in connection status among the Cell1 has UE11, UE12, UE13; The UE that is in connection status among the Cell2 has UE21, UE22, UE23.Three sub-districts are neighboring BS relationship each other.
RNC (Radio Network Controller, radio network controller) notice UE11 reporting measurement reports.Particularly, RNC can regularly notify UE11 reporting measurement reports.
After RNC receives the measurement report of UE11, two minizone SFN observed time differences between CELL1 in the measurement report and each adjacent area are adjudicated.If wherein there are two minizone SFN observed time differences to surpass the first predetermined threshold value, such as being made as 3us to TD-SCDMA, then there is the situation that the clock phase deviation between two base stations exceeds standard in explanation.
At this moment, for step-out has appearred in the clock of further determining which base station, then RNC initiates to measure control messages to UE12, UE13, UE21, UE22, UE23.
Court verdict above supposing is that two minizone SFN observed time differences between CELL1 and the CELL2 have surpassed first threshold value, the measurement report that this moment, RNC can report according to UE12, UE13, UE21, UE22, UE23 then, obtain CELL1 in each measurement report and two minizone SFN observed time differences between the CELL2 respectively, then these two minizones SFN observed time differences are averaged, obtain the average V of two minizone SFN observed time differences between CELL1 and the CELL2
1-2If this average V
1-2(second threshold value can be identical with first threshold value greater than the predetermined second threshold value, also can be different), then RNC also needs further to obtain CELL2 in each measurement report and two minizone SFN observed time differences between the CELL3, these two minizones SFN observed time differences are averaged, obtain the average V of two minizone SFN observed time differences between CELL2 and the CELL3
2-3If this average V
2-3Smaller or equal to described second threshold value, the base station that the CELL1 place then is described is step-out, and the base station at CELL2 and CELL3 place is step-out not.
Certainly, RNC also can obtain CELL1 in each measurement report and two minizone SFN observed time differences between the CELL3 earlier, these two minizones SFN observed time differences are averaged, obtain the average V of two minizone SFN observed time differences between CELL1 and the CELL3
1-3If this average V
1-3Smaller or equal to described second threshold value, the base station that the CELL2 place then is described is step-out, and the base station at CELL1 and CELL3 place is step-out not.
Need to prove that above-mentioned first threshold value can be set according to the different of application need and system with second threshold value.And when RNC other except that UE11 in CELL1 and CELL2 were in the terminal initiation measurement control messages of connection status, all or part of terminal that can choose wherein initiated to measure control messages.
After adopting above-mentioned detection method to detect the base station step-out at Cell1 place, the Cell2 of UE21, UE22, UE23 measurement and the two minizone SFN observed time differences of Cell1 are averaged as value time calibration to Cell1, promptly the clock phase compensation are carried out in the base station that has the clock phase deviation.
Particularly, it is synchronous to notify the base station at Cell1 place to stop GPS by RNC, and value time calibration that will calculate above sends to the base station at Cell1 place.
The clock module of the base station at Cell1 place according to described time calibration value clock alignment is carried out in this base station.Similar in concrete calibration process and the prior art, be not described in detail at this.
This shows, embodiment of the invention time-division system air interface synchronization method, carry out cascading judgement according to the SFN-SFN OTD in the measurement report of a plurality of terminal to report in the neighbor cell, determine the base station of step-out and the base station of step-out not, thereby can the base station step-out that the slow drift in clock source causes be detected effectively, and then the base station of step-out carried out synchronously, thereby realized the time-division system air interface synchronization, ensured the operate as normal of base station.
In actual applications, because two different districts that two minizone SFN observed time differences are just measured arrive the time difference of same terminal, the transmission range of eating dishes without rice or wine inconsistent do not cooked correction, therefore in fact in above-mentioned steps 101, two minizone SFN observed time differences of terminal to report can not accurately reflect two clock phase deviations between the base station.Comprised the error that terminal to two a sub-district distance is different and introduce in the two minizone SFN observed time differences, this error amount varies in size and different with terminal and base station distance are inconsistent.For the city, therefore less in the two minizone SFN observed time differences because the base station spacing is less because of the error of the inconsistent generation of distance, and for suburb or rural area, increase greatly owing to the base station spacing, this influence will increase.
For this reason, in order to reduce above-mentioned error, in the invention described above embodiment time-division system air interface synchronization method, can distinguish the base station in the RNC side and be in city or suburb, at the residing zones of different in base station, set different judgement thresholdings, promptly above-mentioned first threshold value and second threshold value are so that the system air interface synchronization of making reaches better effect.
Such as, the protection of reserving from the TD-SCDMA structure of time slot is (GP) length at interval, if two minizone SFN observed time differences between two base stations surpass 16 chip (chip); The minizone of two base stations will produce interference; Therefore, can set described first threshold value＞16Chip.When two minizone SFN observed time differences of the terminal to report that surpasses certain proportion (0%-100%) surpass described first threshold value, just can judge possible step-out between the base station.
The TD-SCDMA system is a system that synchronization accuracy is had relatively high expectations, if the sub-district clock is asynchronous between the base station, can cause interference each other on the one hand, network ISCP (Interference Signal CodePower, Interference Signal Code Power) can raise, because the minizone is asynchronous, can cause the minizone success rate for switching to descend greatly on the other hand, these two characteristics are the obvious performances behind the time-division system base station step-out.
Therefore, in order further to reduce the measure error that terminal to base station may be introduced apart from difference, can also be by the above-mentioned two kinds of performances behind the base station step-out as subsidiary conditions, so that judge whether really step-out of base station more accurately.
The base station of step-out and the base station of step-out have not been supposed to determine, then before clock alignment is carried out in the base station of step-out, can also from described step-out base station, filter out the base station that really is in desynchronizing state further combined with sub-district handover success rate and/or Interference Signal Code Power, judge to do more accurately, make when clock alignment is carried out in the base station of step-out, only clock alignment is carried out in the base station that really is in desynchronizing state.Particularly, following three kinds of schemes can be arranged.
Scheme one: by sub-district handover success rate auxiliary judgment base station step-out
In this scheme, threshold parameter can be set: " the incision success rate worsens relative threshold " and/or " cut out success rate and worsen relative threshold ", and need do following processing:
(1) at any one sub-district in the described step-out base station, by cutting and/or cut out success rate between the base station of this step-out base station of counters count and neighbor cell;
(2) switch incision and/or cut out average success rate between all base stations in the RNC under the described step-out of the statistics base station;
(3) if between the base station of described step-out base station and neighbor cell in incision success rate and the described RNC the average success rate relative ratio of incision between the base station less than default " incision success rate deterioration relative threshold ", and/or cut out between the base station of described step-out base station and neighbor cell in success rate and the described RNC and to cut out average success rate relative ratio less than default " cut out success rate and worsen relative threshold " between the base station, judge that then this base station really is in desynchronizing state.
Scheme two: by ISCP auxiliary judgment base station step-out
In this scheme, threshold parameter can be set: " ISCP worsens relative threshold ", and need do following processing:
(1), adds up each time slot ISCP mean value of this sub-district at any one sub-district in the described step-out base station;
(2) each time slot ISCP mean value in the RNC under the described step-out of the statistics base station;
(3) if each time slot ISCP mean value relative ratio of interior each time slot ISCP mean value of described RNC and described sub-district less than default " ISCP worsens relative threshold ", judges that then described step-out base station really is in desynchronizing state.
Scheme three: by sub-district handover success rate and the comprehensive auxiliary judgment base station step-out of ISCP
In this scheme, need be provided with that a threshold parameter " comprehensively worsens relative threshold " and a scale factor parameter " the ISCP judgment mechanism accounting factor ", and need do following processing:
(1) at any one sub-district statistics time slot ISCP in the step-out base station;
(2) at any one sub-district in the step-out base station by incision between the counters count base station, cut out success rate;
(3) time slot ISCP mean value in the RNC under the described step-out of the statistics base station;
(4) switch incision between the base station in the RNC under the described step-out of the statistics base station, cut out average success rate;
(5) if [cutting the average success rate relative ratio of incision * (1-" the ISCP judgment mechanism accounting factor ") of success rate and described RNC in the described RNC between the base station of each time slot ISCP mean value relative ratio * " the ISCP judgment mechanism accounting the factor "+problem cells of time slot ISCP mean value and problem cells] less than default " comprehensively worsening relative threshold ", judges that then described step-out base station really is in desynchronizing state.
Certainly, do not limit concrete mode in the embodiment of the invention by sub-district handover success rate and/or ISCP auxiliary judgment base station step-out.
One of ordinary skill in the art will appreciate that all or part of step that realizes in the foregoing description method is to instruct relevant hardware to finish by program, described program can be stored in the computer read/write memory medium, described storage medium, as: ROM/RAM, magnetic disc, CD etc.
Correspondingly, the embodiment of the invention also provides a kind of RNC, as shown in Figure 3, is a kind of structural representation of this RNC.
In this embodiment, described RNC comprises:
Measurement report receiving element 301 is used for the measurement report of the terminal to report in the reception of neighboring cell;
Detecting unit 302 is used for the SFN-SFNOTD according to the measurement report of the terminal to report in the neighbor cell, has determined whether that step-out appears in the base station;
In embodiments of the present invention, a kind of preferred structure of described detecting unit 302 comprises:
The first notice subelement is used for notifying a plurality of terminals first terminal to report measurement report in the described neighbor cell, specifically can regularly notify the first terminal to report measurement report in described a plurality of terminal.
Whether first detection sub-unit, the measurement report that is used for detecting described first terminal to report first sub-district and the second minizone SFN observed time difference surpass the first predetermined threshold value.
The second notice subelement, be used for after described first detection sub-unit detects first sub-district and the second minizone SFN observed time difference and surpasses the first predetermined threshold value, the other-end that is in connection status in sub-district, the described first terminal place and with sub-district, described first terminal place neighbor cell in the formed combination of the terminal that is in connection status in a plurality of terminals initiate to measure control messages.
Second detection sub-unit, be used for detecting the ratio that first sub-district and the second minizone SFN observed time difference in the measurement report of a plurality of terminal to report of described combination surpass described first thresholding and surpass predetermined proportion threshold value, determine that step-out appears in base station in first sub-district or the base station in second sub-district.
As shown in Figure 3, in embodiments of the present invention, a kind of preferred structure of described lock unit 303 comprises:
Wherein, described step-out base station determines that a kind of preferred structure of subelement 331 comprises:
Relatively subelement 342 is used for respectively relatively each average and predetermined second threshold value, and determines the base station of step-out and the base station of step-out not according to comparative result; If the average of first sub-district and the second minizone SFN observed time difference surpasses second threshold value, and the average of first sub-district and other minizones SFN observed time difference except that second sub-district surpasses described second threshold value, then determine the base station step-out in second sub-district, the base station in first sub-district is step-out not; If perhaps the average of first sub-district and the second minizone SFN observed time difference surpasses second threshold value, and the average of second sub-district and other minizones SFN observed time difference except that first sub-district surpasses described second threshold value, then determine the base station step-out of first sub-district, the base station in second sub-district is step-out not.
The RNC of the embodiment of the invention, carry out cascading judgement according to the SFN-SFN OTD in the measurement report of a plurality of terminal to report in the neighbor cell, determine the base station of step-out and the base station of step-out not, thereby can the base station step-out that the slow drift in clock source causes be detected effectively, and then the base station of step-out carried out synchronously, thereby realized the time-division system air interface synchronization, ensured the operate as normal of base station.
As shown in Figure 4, be the another kind of structural representation of embodiment of the invention RNC.
With embodiment illustrated in fig. 3 different be that in this embodiment, described lock unit 303 further comprises:
Correspondingly, described clock alignment subelement 332 specifically is used for the base station that really is in desynchronizing state that described screening subelement 333 filters out is carried out synchronously.
Whether really the RNC of the embodiment of the invention can further reduce the measure error that terminal to base station may be introduced apart from difference, can also be by the above-mentioned two kinds of performances behind the base station step-out as subsidiary conditions, so that judge base station step-out more accurately.
In actual applications, the situation that is provided with according to RNC clock source, described clock alignment subelement 332 can be when carrying out clock alignment to the base station of step-out, if when there is the backup reference source base station of described step-out, indicates the base station of described step-out that local clock is switched to described backup reference source; Perhaps when if reference source is not backed up in the base station of described step-out, with the base station of step-out and not the SFN-SFN OTD between the base station of step-out send to the base station of described step-out so that clock alignment is carried out according to the SFN-SFN OTD that receives in the base station of described step-out.Particularly, base station step-out in first sub-district, and when not backing up reference source, calculate the average of first sub-district and the second minizone SFN observed time difference in the measurement report of the terminal to report in other sub-districts adjacent with first sub-district, and this average sent to base station in first sub-district, so that clock alignment is carried out according to the average that receives in the base station in first sub-district; The perhaps base station step-out in second sub-district, and when not backing up reference source, calculate the average of first sub-district and the second minizone SFN observed time difference in the measurement report of the terminal to report in other sub-districts adjacent with second sub-district, and this average sent to base station in second sub-district, so that clock alignment is carried out according to the average that receives in the base station in second sub-district.
Need to prove, the time-division system air interface synchronization method and the equipment of the embodiment of the invention, not only go for TD-SCDMA, also can be adapted to the system of other strict synchronism of need eating dishes without rice or wine, as LTE-TDD (Long Term Evolution-Time Division Duplexing, long-term advancing time division duplex) system, WIMAX-TDD (Worldwide Interoperability for Microwave Access-Time DivisionDuplexing, micro-wave access global inter communication time division duplex) system etc.; And be not limited to adopt the application scenario of GPS as base station system clock reference benchmark, also be suitable for adopting IEEE (Institute of Electricaland Electronics Engineers, institute of electrical and electronic engineers) 1588V2 standard or other technologies to realize base station system clock synchronization scene.
More than the embodiment of the invention is described in detail, used embodiment herein the present invention set forth, the explanation of above embodiment just is used for help understanding method and apparatus of the present invention; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (14)
1. a time-division system air interface synchronization method is characterized in that, comprising:
Two minizone SFN observed time differences according in the measurement report of at least one terminal to report in the neighbor cell have determined whether that step-out appears in the base station;
If there is the base station step-out to occur, then the base station of step-out is carried out synchronously.
2. method according to claim 1 is characterized in that, if described have the base station step-out to occur, then the base station to step-out comprises synchronously:
Determine the base station of step-out and the base station of step-out not;
Clock alignment is carried out in base station to step-out.
3. method according to claim 2 is characterized in that, and is described according to two minizone SFN observed time differences in the measurement report of at least one terminal to report in the neighbor cell, determined whether that the base station step-out occurs and comprises:
Notify the first terminal to report measurement report in a plurality of terminals in the described neighbor cell;
If first sub-district and the second minizone SFN observed time difference surpass the first predetermined threshold value in the measurement report of described first terminal to report, then the other-end that is in connection status in sub-district, the described first terminal place and with sub-district, described first terminal place neighbor cell in the formed combination of the terminal that is in connection status in a plurality of terminals initiate to measure control messages;
Receive the measurement report of a plurality of terminal to report in the described combination;
If the ratio that first sub-district and the second minizone SFN observed time difference surpass described first thresholding in the measurement report that receives is above predetermined proportion threshold value, step-out appears in base station in then definite first sub-district or the base station in second sub-district.
4. method according to claim 2 is characterized in that, the base station of described definite step-out and not the base station of step-out comprise:
Calculate the average of first sub-district and the second minizone SFN observed time difference in the measurement report of one or more terminal to report in the described combination, and the average of SFN observed time difference between average, second sub-district and other neighbor cells except that first sub-district of SFN observed time difference between first sub-district and other neighbor cells except that second sub-district;
If the average of first sub-district and the second minizone SFN observed time difference surpasses second threshold value, and the average of first sub-district and other minizones SFN observed time difference except that second sub-district surpasses described second threshold value, then determine the base station step-out in second sub-district, the base station in first sub-district is step-out not; Perhaps
If the average of first sub-district and the second minizone SFN observed time difference surpasses second threshold value, and the average of second sub-district and other minizones SFN observed time difference except that first sub-district surpasses described second threshold value, then determine the base station step-out of first sub-district, the base station in second sub-district is step-out not.
5. method according to claim 4 is characterized in that, described base station to step-out comprises synchronously:
If there is the backup reference source base station of described step-out, then indicate the base station of described step-out that local clock is switched to described backup reference source.
6. method according to claim 4 is characterized in that, described base station to step-out comprises synchronously:
If the base station step-out in first sub-district, and do not back up reference source, then calculate the average of first sub-district and the second minizone SFN observed time difference in the measurement report of the terminal to report in other sub-districts adjacent with first sub-district, and this average sent to base station in first sub-district, so that clock alignment is carried out according to the average that receives in the base station in first sub-district; Perhaps
If the base station step-out in second sub-district, and do not back up reference source, then calculate the average of first sub-district and the second minizone SFN observed time difference in the measurement report of the terminal to report in other sub-districts adjacent with second sub-district, and this average sent to base station in second sub-district, so that clock alignment is carried out according to the average that receives in the base station in second sub-district.
7. according to each described method of claim 2 to 6, it is characterized in that described method also comprises:
Before clock alignment is carried out in the step-out base station, utilize sub-district handover success rate and/or Interference Signal Code Power from described step-out base station, to filter out the base station that really is in desynchronizing state;
Describedly clock alignment is carried out in the step-out base station comprise: clock alignment is carried out in the base station that really is in desynchronizing state that filters out.
8. a radio network controller is characterized in that, comprising:
The measurement report receiving element is used for the measurement report of at least one terminal to report in the reception of neighboring cell;
Detecting unit is used for two minizone SFN observed time differences according to the measurement report of the terminal to report in the neighbor cell, has determined whether that step-out appears in the base station;
Lock unit is used for after described detecting unit has detected the base station and step-out occurs the base station of described step-out being carried out synchronously.
9. radio network controller according to claim 8 is characterized in that, described lock unit comprises:
Subelement is determined in the step-out base station, is used for after described detecting unit has detected the base station and step-out occurs, determines the base station of step-out and the base station of step-out not;
The clock alignment subelement is used for clock alignment is carried out in the base station of step-out.
10. radio network controller according to claim 9 is characterized in that, described detecting unit comprises:
The first notice subelement is used for notifying a plurality of terminals first terminal to report measurement report in the described neighbor cell;
Whether first detection sub-unit, the measurement report that is used for detecting described first terminal to report first sub-district and the second minizone SFN observed time difference surpass the first predetermined threshold value;
The second notice subelement, be used for after described first detection sub-unit detects first sub-district and the second minizone SFN observed time difference and surpasses the first predetermined threshold value, the other-end that is in connection status in sub-district, the described first terminal place and with sub-district, described first terminal place neighbor cell in the formed combination of the terminal that is in connection status in a plurality of terminals initiate to measure control messages;
Second detection sub-unit, be used for detecting the ratio that first sub-district and the second minizone SFN observed time difference in the measurement report of a plurality of terminal to report of described combination surpass described first thresholding and surpass predetermined proportion threshold value, determine that step-out appears in base station in first sub-district or the base station in second sub-district.
11. radio network controller according to claim 10 is characterized in that, described step-out base station determines that subelement comprises:
Computation subunit, be used for calculating the average of first sub-district and the second minizone SFN observed time difference in the measurement report of a plurality of terminal to report of described combination, and the average of SFN observed time difference between average, second sub-district and other neighbor cells except that first sub-district of SFN observed time difference between first sub-district and other neighbor cells except that second sub-district;
Relatively subelement is used for respectively relatively each average and predetermined second threshold value, and determines the base station of step-out and the base station of step-out not according to comparative result; If the average of first sub-district and the second minizone SFN observed time difference surpasses second threshold value, and the average of first sub-district and other minizones SFN observed time difference except that second sub-district surpasses described second threshold value, then determine the base station step-out in second sub-district, the base station in first sub-district is step-out not; If perhaps the average of first sub-district and the second minizone SFN observed time difference surpasses second threshold value, and the average of second sub-district and other minizones SFN observed time difference except that first sub-district surpasses described second threshold value, then determine the base station step-out of first sub-district, the base station in second sub-district is step-out not.
12. radio network controller according to claim 11 is characterized in that,
Described clock alignment subelement when clock alignment is carried out in the base station of step-out, if there is the backup reference source base station of described step-out, indicates the base station of described step-out that local clock is switched to described backup reference source.
13. radio network controller according to claim 11 is characterized in that,
Described clock alignment subelement, when clock alignment is carried out in the base station of step-out, if the base station step-out in first sub-district, and do not back up reference source, calculate the average of first sub-district and the second minizone SFN observed time difference in the measurement report of the terminal to report in other sub-districts adjacent with first sub-district, and this average sent to base station in first sub-district, so that clock alignment is carried out according to the average that receives in the base station in first sub-district; Perhaps if the base station step-out in second sub-district, and do not back up reference source, calculate the average of first sub-district and the second minizone SFN observed time difference in the measurement report of the terminal to report in other sub-districts adjacent with second sub-district, and this average sent to base station in second sub-district, so that clock alignment is carried out according to the average that receives in the base station in second sub-district.
14., it is characterized in that described lock unit also comprises according to each described radio network controller of claim 9 to 12:
The screening subelement is used for utilizing sub-district handover success rate and/or Interference Signal Code Power to filter out the base station that really is in desynchronizing state from described step-out base station;
Described clock alignment subelement specifically is used for the base station that really is in desynchronizing state that filters out is carried out synchronously.
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| CN 201010111228 CN102149186B (en) | 2010-02-10 | 2010-02-10 | Null interface synchronization method and equipment of time division system |
| PCT/CN2011/070803 WO2011098011A1 (en) | 2010-02-10 | 2011-01-30 | Synchronization method and device for air interface in time division system |
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| CN 201010111228 CN102149186B (en) | 2010-02-10 | 2010-02-10 | Null interface synchronization method and equipment of time division system |
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| CN113141647A (en) * | 2020-01-17 | 2021-07-20 | 大唐移动通信设备有限公司 | Synchronous time information transmission method, terminal and network side equipment |
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| CN103533566A (en) * | 2012-07-04 | 2014-01-22 | 中国移动通信集团设计院有限公司 | Method and device for detecting out-of-step community |
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| CN102149186B (en) | 2013-10-09 |
| WO2011098011A1 (en) | 2011-08-18 |
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