CN104754726A - Method and system for performing GSM neighboring region synchronization by mobile terminal - Google Patents
Method and system for performing GSM neighboring region synchronization by mobile terminal Download PDFInfo
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- CN104754726A CN104754726A CN201310752972.1A CN201310752972A CN104754726A CN 104754726 A CN104754726 A CN 104754726A CN 201310752972 A CN201310752972 A CN 201310752972A CN 104754726 A CN104754726 A CN 104754726A
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Abstract
The invention relates to a method and system for performing GSM neighboring region synchronization by a mobile terminal. The method comprises the following steps: performing the frequency point sorting to multiple neighboring regions configured in the network, selecting the basic neighboring regions with the stated number and multiple supplement neighboring regions of which the sorting sequence follows that of the basic neighboring regions; performing the burst synchronization to the basic neighboring regions and the supplement neighboring regions; performing the frequency correction burst search to the basic neighboring regions and the supplement neighboring regions, wherein the frequency correction burst search is preferentially performed to the basic neighboring regions, and after the frequency correction burst search is tried to be performed to the basic neighboring regions, at least one supplement neighboring region is immediately inserted for performing the frequency correction burst search no matter whether the attempt is successful; and performing the base station identity code (BSIC) re-confirm.
Description
Technical field
The present invention relates to moving communicating field, especially relate to the method and system that a kind of mobile terminal carries out GSM neighbor synchronization.
Background technology
In mobile communication terminals, needs carry out and maintenance system is interior and neighbor synchronization between system, can be switched to the adjacent area in system or between system under loss current neighbor or other situations smoothly.Current mobile communication standard is from 3G to 4G transition, but meanwhile 2G pattern, such as GSM still worldwide ubiquity.Therefore in visible future, under 3G and the 4G patterns such as WCDMA, TD-SCDMA, CDMA2000, TD-LTE and LTE-FDD, also there are the needs carrying out and safeguard GSM neighbor synchronization widely.
Existing GSM neighbor synchronization and timed maintenance strategy are divided into initial BSIC(Base Station IdentityCode, base station identity code) identify that (being abbreviated as INIT BSIC) and BSIC heavily confirm (BSICRECONFIRM) two parts.Initial BSIC identifies and is divided into again frequency correction burst to search for (Frequencycorrection Burst SEARCH, FB SEARCH) and synchronous (Synchronization BurstSYCN, SB SYNC) two steps of synchronization burst.For FB SEARCH, terminal first finds out 6 the strongest adjacent areas of neighboring area signal intensity (in order to follow-up description is convenient in each SACCH cycle, these 6 the strongest adjacent areas of signal strength signal intensity are called TOP6), and then successively on IDLE (free time) frame, FB SEARCH is carried out to TOP6 adjacent area according to signal strength signal intensity.And for SB SYNC and BSIC RECONFIRM, be then that TOP6 adjacent area is configured on traffic frame according to SB collocation point sequencing, or configure on IDLE frame according to certain criterion.
Existing neighbor synchronization and timed maintenance scheme are all carry out based on basis, TOP6 adjacent area, but this scheme has the shortcoming of 2 below:
1, FB SEARCH is configured successively according to signal strength signal intensity, namely after the adjacent area FBSEARCH that signal is stronger completes, carry out the FB SEARCH of more weak next adjacent area, some adjacent area stronger when signal in TOP6 adjacent area always cannot be synchronous, then FB resource allocation is seized in these strong adjacent areas always in turn, and weak adjacent area cannot be carried out synchronously in time.Only have when these strong adjacent areas are found FB or exit TOP6, FB SEARCH just can be carried out in more weak adjacent area.
2INT BSIC and BSIC RECONFIRM carries out based on TOP6 adjacent area.In existing network, GSM adjacent area number is often greater than 6 and is different frequency range, according to agreement 45.008sec8.4.3, when network configuration multiband_reporting be not 0 (the strong and weak order arrangement of individual palpation incoming level) and wherein certain frequency range neighboring area signal is more weak, and another frequency range neighboring area signal all stronger when, if the adjacent area of stronger signal frequency range cannot enter TOP6 adjacent area, then synchronously can not search for this adjacent area, cause more weak frequency range adjacent area in TOP6 adjacent area cannot find synchronously, and synchronous consequence can not be carried out in the strong adjacent area that TOP6 is not entered in stronger frequency range adjacent area, thus cause synchronous neighboring BS information in measurement report to be less than 6 adjacent areas.And network can only select to switch from the synchronously adjacent area of terminal to report target adjacent area, selectable target adjacent area is less, at high-speed railway, under the fast moving scenes such as highway, owing to affecting by factors such as landform, may a lot of neighboring cell signal quality not be very good, thus the adjacent area making network fail to select suitable adjacent area command terminal to switch in time or select be failed obviously to improve speech quality and is caused call drop or serious phonetic problem.
Summary of the invention
Technical problem to be solved by this invention is to provide the method and system that a kind of mobile terminal carries out GSM neighbor synchronization, to improve synchronous efficiency.
The present invention is that to solve the problems of the technologies described above the technical scheme adopted be a kind of method that mobile terminal carries out GSM neighbor synchronization, comprise the following steps: frequency sequence is carried out to multiple adjacent areas of network configuration, to select a multiple supplementary adjacent area defined amount basic adjacent area and ordering following described basic adjacent area closely; Synchronization burst carries out to described basic adjacent area and supplementary adjacent area synchronous; Frequency correction burst search is carried out to described basic adjacent area and supplementary adjacent area, wherein the search of this frequency correction burst is preferentially implemented described basic adjacent area, and after trial implements the search of this frequency correction burst to all basic adjacent areas, whether successfully no matter attempt, all and then insert at least one supplementary adjacent area and implement the search of this frequency correction burst; And carry out BSIC and heavily confirm.
In one embodiment of this invention, the method of a defined amount basic adjacent area is selected to comprise: if multiband_reporting is 0, is sorted from big to small according to signal strength signal intensity in described multiple adjacent area, and using defined amount adjacent area the strongest for signal strength signal intensity as described basic adjacent area; If multiband_reporting is not 0, then described multiple adjacent areas frequency-division section is sorted from big to small by signal strength signal intensity, and describe selection defined amount adjacent area as described basic adjacent area according to 45.008 agreement sec8.4.3.
In one embodiment of this invention, the method for multiple supplementary adjacent area is selected to comprise: to be sorted from big to small according to signal strength signal intensity described multiple adjacent area, and using multiple adjacent areas the strongest for signal strength signal intensity outside basic adjacent area as described supplementary adjacent area.
In one embodiment of this invention, select the method for multiple supplementary adjacent area to comprise: to be sorted from big to small by signal strength signal intensity by described multiple adjacent areas frequency-division section, and the adjacent area outside basic adjacent area is described the multiple adjacent area of selection as described supplementary adjacent area according to 45.008 agreement sec8.4.3.
In one embodiment of this invention, the step that synchronization burst is carried out synchronous in described basic adjacent area and supplementary adjacent area is comprised: record each adjacent area and lose synchronous time point, for judging whether each adjacent area attempted synchronous; The step of described basic adjacent area and supplementary adjacent area being carried out to frequency correction burst search comprises: record each adjacent area and lose synchronous time point, for judging whether each adjacent area attempted synchronous.
In one embodiment of this invention, if not synchronous basic adjacent area has all attempted overfrequency correction burst search and the time of attempting all is later than supplementary adjacent area, then frequency correction burst search is carried out in the supplementary adjacent area of configuration, if not, then represent that not synchronous basic adjacent area also exists and do not attempt overfrequency correction burst search, or attempt frequency corrects the time of burst search than compensating more Zao community, adjacent area, then frequency correction burst search is carried out in configure base adjacent area.
In one embodiment of this invention, the step that frequency correction burst search is carried out in configure base adjacent area comprises: judge whether to exist and do not attempt synchronous basic adjacent area, if so, then search for according to the synchronous basic neighbor cell configuration frequency correction burst of not attempting selecting signal strength signal intensity the strongest; If basic adjacent area was all attempted synchronously, then selected to attempt the lock in time of basic neighbor cell configuration frequency correction burst search the earliest.
In one embodiment of this invention, the step that frequency correction burst search is carried out in the supplementary adjacent area of configuration comprises: judge whether to exist and do not attempt synchronous supplementary adjacent area, if had, then the synchronous supplementary neighbor cell configuration frequency correction burst of not attempting selecting signal strength signal intensity the strongest is searched for; If supplementing adjacent area all attempted synchronously, then selected to attempt the lock in time of supplementary neighbor cell configuration frequency correction burst search the earliest.
In one embodiment of this invention, the time point that described loss is synchronous is lose synchronous frame number.
In one embodiment of this invention, also comprise and safeguard the frame number that loss is synchronous in the following manner: when frequency correction burst is searched for successfully, lose synchronous frame number and be updated to invalid value; When frequency correction burst is searched for unsuccessfully, lose synchronous frame number and be updated to the current frame number in Serving cell; During synchronization burst synchronously success, lose synchronous frame number and be updated to invalid value; During synchronization burst synchronization failure, lose synchronous frame number and be updated to the current frame number in Serving cell; When BSIC heavily confirms successful, lose synchronous frame number and be updated to invalid value; When BSIC heavily confirms failed, lose synchronous frame number and be updated to the current frame number in Serving cell; Switch or gravity treatment time, adjacent area is lost synchronous frame number and is scaled corresponding new Serving cell frame number.
In one embodiment of this invention, the priority that described synchronization burst is synchronous is searched for higher than described frequency correction burst.
The present invention also proposes the system that a kind of mobile terminal carries out GSM neighbor synchronization, comprising:
For carrying out frequency sequence to multiple adjacent areas of network configuration, to select a module defined amount basic adjacent area and ordering following the multiple supplementary adjacent area of described basic adjacent area closely;
For carrying out the synchronous module of synchronization burst to described basic adjacent area and supplementary adjacent area;
For carrying out the module of frequency correction burst search to described basic adjacent area and supplementary adjacent area, wherein the search of this frequency correction burst is preferentially implemented described basic adjacent area, and after trial implements the search of this frequency correction burst to all basic adjacent areas, whether successfully no matter attempt, all and then insert at least one supplementary adjacent area and implement the search of this frequency correction burst; And
For carrying out the module that BSIC heavily confirms.
The present invention is due to the synchronous situation according to certain priority poll configure base adjacent area and supplementary adjacent area, and attempted synchronously in the adjacent area that priority is higher, no matter whether successful, all allow the posterior adjacent area of priority have an opportunity to attempt synchronously, and need not wait until that the adjacent area that priority is higher completes synchronously.Therefore the present invention compared with prior art, each candidate can be tried one's best and attempt synchronously in time, and can safeguard adjacent area timing after acquisition is synchronous.
Accompanying drawing explanation
For above-mentioned purpose of the present invention, feature and advantage can be become apparent, below in conjunction with accompanying drawing, the specific embodiment of the present invention is elaborated, wherein:
Fig. 1 illustrates the multi-frame structure under GSM CS business.
Fig. 2 illustrates the multi-frame structure under the IDLE frame of GSM.
Fig. 3 illustrates the GSM neighbor synchronization method flow diagram of one embodiment of the invention.
Fig. 4 illustrates the synchronous flow chart of the SB of one embodiment of the invention.
Fig. 5 illustrates that the SB of one embodiment of the invention heavily confirms flow chart.
Fig. 6 illustrates the FB search routine figure of one embodiment of the invention.
Fig. 7 illustrates the entire flow figure of the GSM neighbor synchronization method of one embodiment of the invention.
Embodiment
Saying of summary, embodiments of the invention describe GSM neighbor synchronization method and system, are used for improving the efficiency of GSM neighbor synchronization.At this, GSM neighbor synchronization may be measure GSM adjacent regions carry out synchronous in gsm system.GSM neighbor synchronization also may be the terminal different systematic survey GSM adjacent area of the various pattern such as compatible WCDMA, TD-SCDMA, CDMA2000, TD-LTE and LTE-FDD and carry out synchronous.
Fig. 1 illustrates the multi-frame structure under GSM CS business.An IDLE(free time is had as can see from Figure 1 in every 26 multi-frames) frame, and the multi-frame structure under IDLE frame is as Fig. 2, a frequency correction burst (Frequency correction Burst is had every 10 frames or 11 frames in 51 multi-frames, and synchronization burst (Synchronization Burst, SB) FB).Within the CS business next SACCH cycle, only have 4 IDLE frames, the resource that can be used for configuring FB and SB is more nervous, if there is the situation that resource allocation is seized in some strong adjacent area always, will cause other adjacent areas cannot be synchronous in time.In order to solve in existing scheme, each adjacent area FB cannot synchronous and non-TOP6 adjacent area cannot be synchronous in time problem, according to embodiments of the invention, except specifying according to 45.008 agreement sec8.4.3 to select the adjacent area (referred to here as basic adjacent area) of specified quantity, also according to the multiple supplementary adjacent area of extra rules selection.Like this, TOP6 adjacent area is expanded to TOPN adjacent area.The number of TOPN adjacent area is greater than 6, and maximum identical with the adjacent area number of network configuration in theory.Within the scope of this, those skilled in the art can select as required.After the numerical value of N is determined, the number supplementing adjacent area is N-6.Certainly, the number of basic adjacent area is not defined as 6, but specifies according to agreement or can change in other cases.
With existing mode unlike, in an embodiment of the present invention, according to certain priority poll configuration INIT BSIC of TOPN adjacent area and BSIC RECONFIRM, and can need not wait until that the adjacent area that priority is higher completes synchronously.The benefit of this mechanism is, can be tried one's best in TOPN community and attempts synchronously in time, and can safeguard adjacent area timing after acquisition is synchronous.
Fig. 3 illustrates the GSM neighbor synchronization method flow diagram of one embodiment of the invention.Shown in figure 3, flow process comprises the following steps.
In step 301, carry out frequency sequence.
In step 302, judge whether that TOPN adjacent area is the need of configuration synchronization burst synchronization (SB SYNC), if then configure SB SYNC in step 303 subsequently, otherwise flow process enters step 304.
In step 304, configuration frequency corrects burst search (FB SEARCH).
In step 305, judge that whether configuration synchronization burst heavily confirms (SB RECONFIRM) to TOPN, if so, then configures SB RECONFIRM in step 306 subsequently, otherwise process ends.
The feature of the present embodiment is, the frequency sequence of step 301 from multiple adjacent areas of network configuration, chooses suitable TOPN adjacent area by certain rule.Mainly follow these steps to carry out:
(1) is sorted from big to small by signal strength signal intensity in multiple adjacent area; At this, signal strength signal intensity can use RSSI(received signal strength indicator) characterize.
In subsequent step, need according to point different situations process of the regulation in 45.008 agreement sec8.4.3.According to this agreement, multiband_reporting=0 is default behavior, by general fashion report, only reports six neighbor cells by the order that incoming level is the strongest, and does not consider multiband factor; Multiband_reporting=1, the minimum report of each frequency range adjacent area the strongest, all the other press general fashion report; Multiband_reporting=2, the minimum report of each frequency range two adjacent areas the strongest, all the other press general fashion report.
(2) by afore mentioned rules, if multiband_reporting is 0, then in (1), front the last 6 of sequence puts into TOP6 adjacent area (i.e. basic adjacent area), and the 7 to the last 10 puts into OUTOFTOP6 adjacent area (namely supplementing adjacent area).
(3) if multiband_reporting is not 0, then the adjacent area frequency-division section that (1) has sorted is sorted from big to small by signal strength signal intensity.
(4) TOP6 adjacent area is selected according to 45.008 agreement sec8.4.3 descriptions.
(5) resequence from big to small by RSSI intensity in not selected TOP6 adjacent area, and before signal strength signal intensity, OUTOFTOP6 adjacent area is put in semi-finals adjacent area; Or selected community also can be selected by 45.008 agreement sec8.4.3 in OUTOFTOP6 adjacent area.Below, will to be described by signal strength signal intensity sequence.
SB configuration module divides two parts, SB SYNC and BSIC RECONFIRM.After the BSIC of an adjacent area finds, 45.008 agreement regulations carried out BSIC RECONFIRM every 8 seconds.And there were 66 IDLE frames 8 second time.Continuous 11 the IDLE frames of the longest needs of FB SEARCH task receive, and FB can not be interrupted after starting reception.Due to FB receive can not be interrupted and the duration longer, and 8 second time can be the FB SEARCH of 6 communities, therefore set SB SYNC task priority and be equal to or higher than FB SEARCH, BSIC RECONFIRM task priority is lower than FB SEARCH, and first attempt configuration SB SYNC task, configure FB SEARCH task again, finally configure BSICRECONFIRM task, SB SYNC is preferentially configured, so that reasonable arrangement SB SYNC and BSIC RECONFIRM is to the use of IDLE frame time to ensure that FB SEARCH and SB SYNC configures simultaneously.
Fig. 4 illustrates the SB SYNC flow chart of one embodiment of the invention.Shown in figure 4, flow process concrete steps are as follows:
In step 401, synchronously configure beginning, calculate the collocation point doing the community of SB SYNC in TOPN community, judge whether to need configuration SB SYNC according to time of reception order, if needed, go to step 402, otherwise go to step 304.
In step 402, judging that SB SYNC collocation point configures the need of on traffic frame, if it is going to step 404, if not then going to step 403.
In step 403, judging that SB SYNC collocation point configures the need of on IDLE frame, if it is going to step 404, if not then going to step 304.
In step 404, configuration SB SYNC, and go to step 304.
In an embodiment of the present invention, SB SYNC flow process also first in the configuration of IDLE frame, then can configure on traffic frame.
Fig. 5 illustrates the SBRECONFIRM flow chart of one embodiment of the invention.As shown in Figure 5, concrete steps are as follows:
In step 501, after FB has configured, calculate the collocation point doing the community of BSIC RECONFIRM in TOPN community, judge whether to need configuration BSIC RECONFIRM according to time of reception order, if needed, go to step 502, otherwise terminate synchronous configuration.
In step 502, judging that BSIC RECONFIRM collocation point configures the need of on traffic frame, if it is going to step 501, if not then going to step 503.
In step 503, judge that BSIC RECONFIRM collocation point configures the need of on IDLE frame, if it is go to step 504, if not then terminating synchronous configuration.
In step 504, configuration SB RECONFIRM, terminates synchronously to configure.
In an embodiment of the present invention, SB RECONFIRM flow process also first in the configuration of IDLE frame, then can configure on traffic frame.
Get back to shown in Fig. 3, FB SEARCH configuration from TOPN adjacent area, selects most suitable community based on most suitable community selective rule to carry out FB configuration.
Fig. 6 illustrates the FB search routine figure of one embodiment of the invention.The execution of this flow process depends on a neighbor synchronization record flow process.This neighbor synchronization record flow process is synchronous by record FB and SB and out of alignment time point reaches and judges most suitable object of carrying out the community of FB SEARCH immediately in TOP6 and OUTOFTOP6 adjacent area.Preferably, this time point represents with System Frame Number.First neighbor synchronization record flow process is introduced below.
Neighbor synchronization record flow process can record each adjacent area and be FB or SB and attempt synchronous frame number, is defined as FN_LOST_SYNC, and frame number is unified to be upgraded with current service cell frame number, and rule is as follows:
During FB SEARCH success, FN_LOST_SYNC is updated to invalid value 0xFFFF.
During FBSEARCH failure, FN_LOST_SYNC is updated to the current frame number in Serving cell.
During SB SYNC success, FN_LOST_SYNC is updated to invalid value 0xFFFF.
During SB SYNC failure, FN_LOST_SYNC is updated to the current frame number in Serving cell.
During BSIC RECONFIRM success, FN_LOST_SYNC is updated to invalid value 0xFFFF.
During BSIC RECONFIRM failure, FN_LOST_SYNC is updated to the current frame number in service adjacent area.
Switch or gravity treatment time, adjacent area FN_LOST_SYNC is scaled corresponding new Serving cell frame number.
Have recorded FN_LOST_SYNC, just can judge whether each adjacent area attempted synchronously on this basis, and determine most suitable adjacent area of carrying out FB SEARCH immediately further.
Shown in figure 6, flow process is as follows:
In step 601, judge whether the FB SEARCH preferentially configuring TOP6 adjacent area.The priority of TOP6 adjacent area and OUTOFTOP6 adjacent area relies on FN_LOST_SYNC value to determine priority, and concrete mechanism is as follows:
(1) obtain FN_LOST_SYNC corresponding to Li Wei synchronized cells, OUTOFTOP6 community with the minimal difference of current frame number, be recorded as min_deltafnlost_outoftop6;
(2) obtain FN_LOST_SYNC corresponding to Li Wei synchronized cells, TOP6 community with the maximum difference of current frame number, be recorded as max_deltafnlost_top6;
(3) judge whether min_deltafnlost_outoftop6 is greater than max_deltafnlost_top6, if words then to represent that FB had all been attempted in all not synchronous TOP6 adjacent areas synchronous and attempt all being later than OUTOFTOP6 adjacent area lock in time, can configure now OUTOFTOP6 adjacent area and carry out FBSEARCH, flow process enters step 602; If not, then represent that FB SEARCH was not attempted in addition in not synchronous TOP6 adjacent area, or the community that the trial FB SEARCH time is more of a specified duration than OUTOFTOP6 community, then preferentially configure TOP6 community and carry out FB SEARCH, flow process enters step 603.
If judge preferential configuration TOP6 adjacent area in step 601, so according to the most suitable TOP6 adjacent area of following rules selection:
(1) judge whether TOP6 community has according to FN_LOST_SYNC and do not attempt synchronous adjacent area and FN_LOST_SYNC is invalid value, if had, then according to signal strength signal intensity select signal the strongest do not attempt synchronous neighbor cell configuration FB SEARCH.
(2) if TOP6 adjacent area was all attempted synchronously, then according to FN_LOST_SYNC, the minimum adjacent area (namely synchronous the earliest adjacent area) of frame number is selected to configure FB SEARCH.
If when judging preferential configuration OUTOFTOP6 community in step 601, select suitable OUTOFTOP6 cell configuration FB SEARCH according to following steps.
(1) sorted in not synchronous OUTOFTOP6 adjacent area from strong to weak by signal strength signal intensity.
(2) judge whether OUTOFTOP6 adjacent area has according to FN_LOST_SYNC and do not attempt synchronous adjacent area and FN_LOST_SYNC is invalid value, if had, then according to signal strength signal intensity select signal the strongest do not attempt synchronous neighbor cell configuration FB SEARCH.
(3) if OUTOFTOP6 adjacent area was all attempted synchronously, then according to FN_LOST_SYNC, the minimum adjacent area (namely synchronous the earliest adjacent area) of frame number is selected to configure FB SEARCH.
For example, N fixes tentatively is 10 adjacent areas.10 adjacent areas arrange with the regulation of agreement 45.008 couples of multiband_reporting from strong to weak according to signal strength signal intensity.6 the strongest cell definitions are TOP6 community, and 4 remaining cell definitions are OUTOFTOP6 community.Setting A, B, C, D, E, F belong to TOP6 community, G, H, I, J belongs to OUTOFTOP6 adjacent area, the FB SEARCH collocation strategy according to Fig. 6, when TOP6 community all attempted FB SEARCH once after, no matter whether TOP6 adjacent area all finds FB, all FB SEARCH is carried out in insertion OUTOFTOP6 adjacent area, and then be the FB SEARCH of left TOP6 adjacent area, circulate successively.Several typical configuration sequence is as follows:
(1) TOP6 adjacent area always all synchronous on time, FB synchronizing sequence is followed successively by A, B, C, D, E, F, G, A, B, C, D, E, F, H, A, B, C, D, E, F, I, A, B, C, D, E, F, J, as shown in Figure 8.
(2), time on the Partial synchronization of TOP6 adjacent area (A, B, C, D are synchronous, and E, F are always not synchronous), FB synchronizing sequence is followed successively by A, B, C, D, E, F, G, E, F, H, E, F, I, E, F, J, as shown in Figure 9.
(3) TOP6 adjacent area all synchronous on time, FB synchronizing sequence is followed successively by A, B, C, D, E, F, G, H, I, J, as shown in Figure 10.
To be measured as example in gsm system, Fig. 7 is the complete neighbor synchronization configuration schematic diagram of one embodiment of the invention, and concrete steps are as follows:
In step 701, synchronously configure beginning, calculate the collocation point doing the adjacent area of SB SYNC in TOPN adjacent area, judge whether to need configuration SB SYNC according to time of reception order, if needed, go to step 702, otherwise go to step 705.
In step 702, judging that SB SYNC collocation point configures the need of on traffic frame, if it is going to step 704, if not then going to step 703.
In step 703, judging that SB SYNC collocation point configures the need of on IDLE frame, if it is going to step 704, if not then going to step 705.
In step 704, configuration SB SYNC, goes to step 705.
In step 705, judge that TOP6 adjacent area is the need of configuration FB SEARCH, if it is goes to step 707, if not then going to step 706.
In step 706, judge that OUTOFTOP6 adjacent area is the need of configuration FB SEARCH, if it is goes to step 707, if not then going to step 708.
In step 707, configuration FB SEARCH, goes to step 708.
In step 708, judge, the need of being BSIC RECONFIRM in TOPN adjacent area, if need to go to step 709, otherwise to go to step 710.
In step 709, configuration BSIC RECONFIRM, goes to step 710.
In step 710, synchronously configure end.
The above embodiment of the present invention have employed the TOPN adjacent area FB SEARCH collocation strategy based on poll form, this strategy passes through, all attempted synchronous in TOP6 adjacent area, and OUTOFTOP6 adjacent area can be allowed when whether finding synchronous regardless of TOP6 adjacent area to insert and to carry out synchronously, taken into account TOP6 priority of adjacent domain higher than OUTOFTOP6 adjacent area simultaneously, ensure that FBSEARCH resource allocation can not be seized in OUTOFTOP6 adjacent area always, make TOPN adjacent area can carry out FB SEARCH in time.Like this, terminal neighbor synchronization efficiency is high, can avoid because other strong adjacent areas that some adjacent area cannot synchronously be caused cannot be synchronous in time always.
In addition, because neighbor synchronization and timed maintenance number are expanded as N number of, the little block reservation of its Central Plains TOP6, N-6 non-TOP6 number of cells can be 0 to (network neighbor number-6) according to terminal strategy and performance, more suitable neighbor synchronization can be found like this, allow network select suitable cell merge according to wireless environment actual conditions.
Embodiments of the invention descend CS business neighbor synchronization and maintenance scheme to be example in the gsm mode, but be appreciated that above-described embodiment be also applicable to GSM under PS business, state neighbor synchronization and the maintenances such as IDLE state is standby.
Although the present invention describes with reference to current specific embodiment, but those of ordinary skill in the art will be appreciated that, above embodiment is only used to the present invention is described, change or the replacement of various equivalence also can be made when not departing from spirit of the present invention, therefore, as long as all will drop in the scope of claims of the application the change of above-described embodiment, modification in spirit of the present invention.
Claims (12)
1. mobile terminal carries out a method for GSM neighbor synchronization, comprises the following steps:
Frequency sequence is carried out to multiple adjacent areas of network configuration, to select a multiple supplementary adjacent area defined amount basic adjacent area and ordering following described basic adjacent area closely;
Synchronization burst carries out to described basic adjacent area and supplementary adjacent area synchronous;
Frequency correction burst search is carried out to described basic adjacent area and supplementary adjacent area, wherein the search of this frequency correction burst is preferentially implemented described basic adjacent area, and after trial implements the search of this frequency correction burst to all basic adjacent areas, whether successfully no matter attempt, all and then insert at least one supplementary adjacent area and implement the search of this frequency correction burst; And
Carry out BSIC heavily to confirm.
2. the method for claim 1, is characterized in that, selects the method for a defined amount basic adjacent area to comprise:
If multiband_reporting is 0, is sorted from big to small according to signal strength signal intensity in described multiple adjacent area, and using defined amount adjacent area the strongest for signal strength signal intensity as described basic adjacent area;
If multiband_reporting is not 0, then described multiple adjacent areas frequency-division section is sorted from big to small by signal strength signal intensity, and describe selection defined amount adjacent area as described basic adjacent area according to 45.008 agreement sec8.4.3.
3. the method for claim 1, is characterized in that, selects the method for multiple supplementary adjacent area to comprise:
Is sorted from big to small according to signal strength signal intensity in described multiple adjacent area, and using multiple adjacent areas the strongest for signal strength signal intensity outside basic adjacent area as described supplementary adjacent area.
4. the method for claim 1, is characterized in that, selects the method for multiple supplementary adjacent area to comprise:
Described multiple adjacent areas frequency-division section is sorted from big to small by signal strength signal intensity, and the adjacent area outside basic adjacent area is described the multiple adjacent area of selection as described supplementary adjacent area according to 45.008 agreement sec8.4.3.
5. the method for claim 1, is characterized in that,
The step that synchronization burst is carried out synchronous in described basic adjacent area and supplementary adjacent area is comprised: record each adjacent area and lose synchronous time point, for judging whether each adjacent area attempted synchronous;
The step of described basic adjacent area and supplementary adjacent area being carried out to frequency correction burst search comprises: record each adjacent area and lose synchronous time point, for judging whether each adjacent area attempted synchronous.
6. method as claimed in claim 5, it is characterized in that, if not synchronous basic adjacent area has all attempted overfrequency correction burst search and the time of attempting all is later than supplementary adjacent area, then frequency correction burst search is carried out in the supplementary adjacent area of configuration, if not, then represent that not synchronous basic adjacent area also exists and do not attempt overfrequency correction burst search, or attempt frequency corrects the time of burst search than compensating more Zao community, adjacent area, then frequency correction burst search is carried out in configure base adjacent area.
7. method as claimed in claim 6, it is characterized in that, the step that frequency correction burst search is carried out in configure base adjacent area comprises:
Judge whether to exist and do not attempt synchronous basic adjacent area, if so, then search for according to the synchronous basic neighbor cell configuration frequency correction burst of not attempting selecting signal strength signal intensity the strongest;
If basic adjacent area was all attempted synchronously, then selected to attempt the lock in time of basic neighbor cell configuration frequency correction burst search the earliest.
8. method as claimed in claim 6, is characterized in that, the step that frequency correction burst search is carried out in the supplementary adjacent area of configuration comprises:
Judge whether to exist and do not attempt synchronous supplementary adjacent area, if had, then the synchronous supplementary neighbor cell configuration frequency correction burst of not attempting selecting signal strength signal intensity the strongest is searched for;
If supplementing adjacent area all attempted synchronously, then selected to attempt the lock in time of supplementary neighbor cell configuration frequency correction burst search the earliest.
9. method as claimed in claim 5, is characterized in that, the synchronous time point of described loss is lose synchronous frame number.
10. method as claimed in claim 9, is characterized in that, also comprises and safeguards the frame number that loss is synchronous in the following manner:
When frequency correction burst is searched for successfully, lose synchronous frame number and be updated to invalid value;
When frequency correction burst is searched for unsuccessfully, lose synchronous frame number and be updated to the current frame number in Serving cell;
During synchronization burst synchronously success, lose synchronous frame number and be updated to invalid value;
During synchronization burst synchronization failure, lose synchronous frame number and be updated to the current frame number in Serving cell;
When BSIC heavily confirms successful, lose synchronous frame number and be updated to invalid value;
When BSIC heavily confirms failed, lose synchronous frame number and be updated to the current frame number in Serving cell;
Switch or gravity treatment time, adjacent area is lost synchronous frame number and is scaled corresponding new Serving cell frame number.
11. the method for claim 1, is characterized in that, the synchronous priority of described synchronization burst is searched for higher than described frequency correction burst.
12. 1 kinds of mobile terminals carry out the system of GSM neighbor synchronization, comprising:
For carrying out frequency sequence to multiple adjacent areas of network configuration, to select a module defined amount basic adjacent area and ordering following the multiple supplementary adjacent area of described basic adjacent area closely;
For carrying out the synchronous module of synchronization burst to described basic adjacent area and supplementary adjacent area;
For carrying out the module of frequency correction burst search to described basic adjacent area and supplementary adjacent area, wherein the search of this frequency correction burst is preferentially implemented described basic adjacent area, and after trial implements the search of this frequency correction burst to all basic adjacent areas, whether successfully no matter attempt, all and then insert at least one supplementary adjacent area and implement the search of this frequency correction burst; And
For carrying out the module that BSIC heavily confirms.
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| CN107306430A (en) * | 2016-04-21 | 2017-10-31 | 华为技术有限公司 | A kind of method of mobile terminal and cell identification |
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| US20040152478A1 (en) * | 2003-01-31 | 2004-08-05 | Ruohonen Jari J. | System and method for extending neighboring cell search window |
| CN101931452A (en) * | 2009-09-29 | 2010-12-29 | 厦门大学 | Digital repeater with frequency hopping function and method for achieving synchronous frequency hopping |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20040152478A1 (en) * | 2003-01-31 | 2004-08-05 | Ruohonen Jari J. | System and method for extending neighboring cell search window |
| CN101931452A (en) * | 2009-09-29 | 2010-12-29 | 厦门大学 | Digital repeater with frequency hopping function and method for achieving synchronous frequency hopping |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107306430A (en) * | 2016-04-21 | 2017-10-31 | 华为技术有限公司 | A kind of method of mobile terminal and cell identification |
| CN107306430B (en) * | 2016-04-21 | 2020-07-14 | 华为技术有限公司 | Mobile terminal and cell identification method |
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