CN100455095C - Method for inspecting guide-frequency pollution - Google Patents
Method for inspecting guide-frequency pollution Download PDFInfo
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- CN100455095C CN100455095C CNB2006100760787A CN200610076078A CN100455095C CN 100455095 C CN100455095 C CN 100455095C CN B2006100760787 A CNB2006100760787 A CN B2006100760787A CN 200610076078 A CN200610076078 A CN 200610076078A CN 100455095 C CN100455095 C CN 100455095C
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Abstract
The method comprises: setting an absolute threshold and a relative threshold; the radio network controller sends the measurement report that contains the parameters for indicating the happening of pilot frequency contamination to user end (UE); the measurement report records the cell ID and its corresponding RSCP; deciding if all RSCPs of cell in the records are more than the absolute threshold, and the difference between maximum RSCP and minimum RSCP is less the relative threshold; if yes, then outputting cell ID included in the record; otherwise, ending the current process.
Description
Technical field
The present invention relates to detection technique, relate in particular to a kind of method for inspecting guide-frequency pollution.
Background technology
In network, owing to reasons such as network planning problems such as site layout or topography and geomorphology may cause existing simultaneously in some zone the stronger sub-district of a plurality of signals, may there be the zone of pilot pollution exactly in the zone that is covered by these sub-districts.It has been generally acknowledged that there be the sub-district of 3 above received signal code powers (RSCP, Received Signal Code Power) greater than-95dB in pilot pollution zone, and differ between the RSCP of the strong and the most weak sub-district of signal and be no more than 5dB.In addition, according to different understanding to pilot pollution, can be to definition different under the pilot pollution, for example: can will have 3 above RSCP to think the pilot pollution district greater than the sub-district of-90dB, also can will there be 4 above RSCP to think pilot pollution district or the like greater than the sub-district of-90dB, in a word, the pilot pollution district is exactly by the zone of the stronger sub-district covering of a plurality of signals.
Pilot pollution can bring a lot of problems to network, for example covers variation, and at the easy call drop in pilot pollution zone, access is not easy successfully to wait, and these problems all directly influence the performance of network, therefore need to eliminate the zone of pilot pollution in network optimization process as far as possible.
At present, in the network optimization, adopt road measuring method to detect pilot pollution usually, road measuring method is exactly to utilize road detector in the network of reality, gather the RSCP of all sub-districts that some zone can receive on the drive test route, then the data of being gathered are calculated, analyzed and judge, find the point that may have pilot pollution.
Adopt existing road measuring method to detect pilot pollution, owing to need driving or walking to utilize the road detector image data in the network scene of reality, so the workload of drive test is very big, cost is higher, and efficient is lower; In addition, owing to can carry out the regional limited of drive test, a lot of zones, for example path or the indoor drive test that carries out are unpractical, so it is less to adopt existing road measuring method to detect the regional face that can cover of pilot pollution.
Summary of the invention
In view of this, the invention provides a kind of method for inspecting guide-frequency pollution, can realize detection low-cost, expeditiously to pilot pollution, specifically comprise: set absolute thresholding and relative threshold, after radio network controller (RNC) was received and can be reflected the measurement report of the parameter whether pilot pollution takes place comprising of reported by user equipment UE, this method comprised:
Cell ID ID in A, the measurement report records and corresponding received signal code power RSCP thereof;
B, judge sub-district in the record RSCP whether all greater than absolute thresholding, and whether the difference between maximum RSCP and the minimum RSCP be not more than relative threshold, if export the sub-district ID that this record comprises; Otherwise, finish current handling process.
Described measurement report is the 1C measurement report.
Described step B can comprise:
B1, the record that sub-district ID is identical are classified as one group, and counter are set for each group;
B2, judge sub-district in current group the current record RSCP whether all greater than absolute thresholding, and whether the difference between maximum RSCP and the minimum RSCP be not more than relative threshold, if counter is added 1, again execution in step B3; Otherwise, direct execution in step B3;
B3, judge whether all records of relatively intact current group, if, execution in step B4; Otherwise, next bar record of current group as current record, is returned execution in step B2;
B4, judge whether relatively intact all groups, if export the value of the counter of the sub-district ID of each group and this group correspondence; Otherwise, next group as current group, is returned execution in step B2.
UE periodically reports the 1C measurement report, monitor in the 1C measurement report that selection cycle reports in described steps A collection sub-district RSCP the strongest once carry out record.
Record may further include described in the steps A: call time and the pairing interference strength Ec/I in sub-district on record 1C report sign, the 1C
0Middle thrin or three's combination in any.
Record may further include described in the steps A: the sub-district ID of record optimum subdistrict.After described step B, this method may further include: judge the sub-district ID that whether all comprises optimum subdistrict in many identical ID place, the sub-district records of being exported, if then get rid of the possibility of this zone as the pilot pollution zone; Otherwise, finish current handling process.
Before described steps A, this method may further include: after RNC receives the 1C measurement report that UE reports, start the location survey to UE, the positioning measurement result that record UE reports.
Can see that from above scheme method for inspecting guide-frequency pollution provided by the present invention has following beneficial effect:
1, method provided by the present invention arrives network collection in worksite data without testing staff's driving or walking, but make full use of the mechanism of user equipment to report 1C incident, automatically obtain in the 1C measurement report for detecting the required data such as RSCP of pilot pollution, so method efficient provided by the invention is higher, saved and detected the cost of pilot pollution, thereby also saved the cost of the network optimization;
2, because the present invention is the 1C measurement report that utilizes user equipment to report, so be not subjected to path or indoor restriction, coverage is bigger;
3, the present invention utilizes subscriber equipment, can fully detect the pilot pollution zone that may exist for the user, and is simple and be easy to realize, also practical.
Description of drawings
Fig. 1 is the method for inspecting guide-frequency pollution flow chart according to the embodiment of the invention.
Embodiment
In order to make the features and advantages of the present invention clearer, the invention will be further described in conjunction with specific embodiments with reference to the accompanying drawings, and it is that example describes that the present invention only reports the 1C measurement report with subscriber equipment in the WCDMA network (UE, User Equipment).
Usually in the WCDMA network, subscriber equipment is set up when calling out, radio network controller (RNC, Radio Network Controller) can control by sending measuring, the measurement control that RNC issues can require UE to report variety of event, 1C incident for example, the 1C incident is meant that the signal of Common Pilot Channel (CPICH) of an inactive set is better than the signal of the CPICH of an Active Set, this specific character according to the 1C incident, comprise in the pairing 1C measurement report of 1C incident whether the reflection corresponding region is the parameter in pilot pollution zone, for example the RSCP of Active Set sub-district, monitor the RSCP of collection and/or detected set sub-district.In sending measuring control, the RNC configuration make UE with Active Set and monitor collection comprise interference strength (Ec/I
0) and the cell signal quality of RSCP and cell scrambling number all report to RNC, wherein, Active Set is the current set of supporting the sub-district that UE calls out, monitor that collection is the set that can support other candidate cell of UE calling, the sub-district of supervision collection is the adjacent area of Active Set sub-district, and Active Set and supervision collection are notified to UE by RNC when disposing, and because UE moving in communication process, monitor that collection may be converted to Active Set at any time, same Active Set also can convert to and monitor collection.So, when UE finds the 1C incident by measuring, will report the 1C measurement report to RNC, according to the configuration that RNC is carried out when sending measuring is controlled, measurement report can comprise all cell IDs (ID) and the corresponding Ec/I of Active Set
0Sub-district ID and corresponding Ec/I with RSCP and supervision collection and detected set
0And RSCP, wherein, detected set is the detected set that can support the candidate cell that UE calls out of UE itself, detected set is the set of cells that can convert Active Set to or monitor collection.
The main thought of present embodiment is exactly: the 1C measurement report that utilizes UE to report, according to the condition of pilot pollution sub-district in the measurement report and corresponding RSCP thereof are analyzed, and realize detection to pilot pollution.
Particularly, referring to Fig. 1, at first, setting is used to judge the threshold value that satisfies the pilot pollution condition: absolute thresholding and relative threshold, here, the default value of absolute thresholding is-95dB, is to judge whether the RSCP of single subdistrict satisfies the threshold value of pilot pollution condition, and might there be pilot pollution in RSCP greater than the sub-district of absolute thresholding; The default value of relative threshold is 5dB, is to judge whether the difference between the RSCP of two sub-districts satisfies the threshold value of pilot pollution condition, and the difference of maximum RSCP and minimum RSCP is not more than in the zone of relative threshold may exist pilot pollution.According to the introduction of background technology as can be known, exist 3 above RSCP greater than-95dB, and the difference between maximum RSCP and the minimum RSCP is not more than the zone of the sub-district of 5dB can think the pilot pollution zone, be limited to-95dB with absolute door in the present embodiment, relative threshold is that 5dB is as the condition that satisfies pilot pollution.In addition, can be according to the different definition of pilot pollution being revised this two threshold values.Concrete detection step is as follows:
Sub-district ID and corresponding RSCP thereof in the 1C measurement report that step 101, record UE report;
After RNC receives the 1C that UE reports, this incident can be input in the journal file as a record, this record comprises: the RSCP of all sub-district ID of Active Set and correspondence thereof and supervision collect and all the sub-district ID of detected set and the RSCP of correspondence thereof in the 1C measurement report, can further include the interference strength Ec/I of all sub-district correspondences
0In addition, in journal file, a lot of incidents and report may be comprised,, 1C report sign can also be in being input to the record of journal file, carried in order to distinguish the report of 1C measurement report and other incident; The time that preferably, can also comprise the 1C reporting events.
In addition, be input to record in the journal file and can further include the sub-district ID of optimum subdistrict, optimum subdistrict also claims leading sub-district, safeguard by RNC, it is Active Set, monitor collection and the strongest sub-district of detection set signal, that is to say, the RSCP of optimum subdistrict might surpass-95dB, and and the difference between the RSCP of other sub-district all is no more than 5dB, thereby might satisfy the condition of pilot pollution, yet, even satisfy the condition of pilot pollution, if but all have this optimum subdistrict in the repeatedly measurement that certain zone is carried out, should not think the pilot pollution zone in the zone so yet, repeatedly measuring here can be according to the different understanding of optimum subdistrict and pilot pollution is set, for example be set at 5 times, so can in journal file, comprise optimum subdistrict, thereby judge that for final the pilot pollution zone provides foundation, for example, when judging pilot pollution regional, if satisfy in the zone of pilot pollution condition and include optimum subdistrict, but at several times, the zone of satisfying the pilot pollution condition in for example detecting for 5 times all comprises this optimum subdistrict, can think that then this zone is not the pilot pollution zone, thereby can in the network optimization, optimization process not done in this sub-district.
In addition, when UE reports the 1C incident, RNC might not process the 1C incident or not keep a record, therefore, may cause UE periodically to report the 1C incident, at this moment, can only select to monitor that the strongest one-shot measurement report of collection RSCP is recorded in it in journal file, promptly only write down sub-district ID and corresponding RSCP thereof, and need not be with the content of the periodic report of correspondence record one by one all.
Through after the step 101, a plurality of 1C incidents that a plurality of UE report will be recorded in the journal file respectively, so, in journal file, comprise many records.
From journal file, take out all records that have 1C report sign, according to the sub-district ID in the record, no matter be Active Set, supervision collection or detected set, all sort out, be about to the identical record of sub-district ID and be classified as one group, for example according to sub-district ID, sub-district ID is respectively A, B, C, D in the record 1, the record 2 in sub-district ID be respectively B, D, C, A, then with these two records as one group, each the group in may comprise many records; For each group is provided with a pilot pollution counter, be used for inferior counting number to pilot pollution, initial value can be made as 0.
Here, preferable implementation is according to sub-district ID record to be divided into some groups, and then be that unit is judged by group according to the definition of pilot pollution one by one with the group, yet, when specific implementation, can not divide into groups yet, and directly judge one by one according to the definition of pilot pollution, can realize detection equally pilot pollution with every the unit of being recorded as.
Here, with of the current record of article one record of first group, also article one of last group can be write down current record, as long as finally can all judge to all records of all groups as current group as current group.
The value of the counter that step 107, the sub-district ID that exports each group and each group are corresponding.
After all groups all relatively finish, can export the result in sequence, such as: export the result with the order of pilot pollution counter descending or according to the sequential scheduling of pilot pollution counter ascending order, the sub-district ID that comprises each group among the result of output, also may further include the value of pilot pollution counter, this result can be used as the foundation that judges whether to exist pilot pollution.For example, if comprise 4 sub-districts in a certain group, have 5 records about these 4 sub-districts, and the value of pilot pollution counter is exactly 5, can illustrate that then may there be pilot pollution in the zone that these 4 sub-districts cover, for further the detection and the network optimization provide foundation.
When judging according to the pilot pollution definition with every the unit of being recorded as, sub-district ID and the judged result of then exporting every record get final product.
In addition, for the particular location that detects the pilot pollution zone is provided, after RNC receives the 1C measurement report, RNC can further start the location survey to the UE that reports the 1C incident, after UE receives the order of location survey, can measure particular location, and measured particular location reported RNC, so the particular location that UE can be reported records in the journal file simultaneously, the particular location that UE reports can be used as the foundation of optimizing pilot pollution point.
Above step is described sub-district ID and the corresponding RSCP thereof in the 1C measurement report that utilizes UE to report RNC in detail in the WCDMA network, condition in conjunction with pilot pollution compares judgement to RSCP, thereby determine the process in pilot pollution zone, can see from above step, the method that the embodiment of the invention provided makes full use of the mechanism of the existing reporting measurement reports of UE self, realization detects the collection of data to pilot pollution, reduce drive test and get workload, save cost, and can comprise the zone that may have pilot pollution in the network, broad covered area as far as possible.
More than be that example is described in detail the present invention to utilize UE to report the mechanism of 1C incident in the WCDMA network, yet, method provided by the invention and thought are equally applicable to other network, cdma network for example is as long as portable terminal can report the measurement report that comprises the parameter that can reflect pilot pollution in the network.
The above is preferred embodiment of the present invention only, is not in order to limit protection scope of the present invention.
Claims (8)
1, a kind of method for inspecting guide-frequency pollution is characterized in that, sets absolute thresholding and relative threshold, and after radio network controller (RNC) was received and can be reflected the measurement report of the parameter whether pilot pollution takes place comprising of reported by user equipment UE, this method comprised:
Cell ID ID in A, the measurement report records and corresponding received signal code power RSCP thereof;
B, whether judge sub-district RSCP in the record, and whether the difference between maximum RSCP and the minimum RSCP be not more than relative threshold, if export the sub-district ID that this record comprises all greater than absolute thresholding; Otherwise, finish current handling process.
2, method according to claim 1 is characterized in that, described measurement report is the 1C measurement report.
3, method according to claim 2 is characterized in that, described step B comprises:
B1, the record that sub-district ID is identical are classified as one group, and counter are set for each group;
B2, judge sub-district in current group the current record RSCP whether all greater than absolute thresholding, and whether the difference between maximum RSCP and the minimum RSCP be not more than relative threshold, if counter is added 1, again execution in step B3; Otherwise, direct execution in step B3;
B3, judge whether all records of relatively intact current group, if, execution in step B4; Otherwise, next bar record of current group as current record, is returned execution in step B2;
B4, judge whether relatively intact all groups, if export the value of the counter of the sub-district ID of each group and this group correspondence; Otherwise, next group as current group, is returned execution in step B2.
4, according to claim 2 or 3 described methods, it is characterized in that UE periodically reports the 1C measurement report, monitor in the 1C measurement report that selection cycle reports in described steps A collection sub-district RSCP the strongest once carry out record.
According to claim 2 or 3 described methods, it is characterized in that 5, record further comprises described in the steps A:
Call time and the pairing interference strength Ec/I in sub-district on record 1C report sign, the 1C
0Middle thrin or three's combination in any.
According to claim 2 or 3 described methods, it is characterized in that 6, record further comprises described in the steps A:
The sub-district ID of record optimum subdistrict.
7, method according to claim 6 is characterized in that, after described step B, this method further comprises:
Judge the sub-district ID that whether all comprises optimum subdistrict in many identical ID place, the sub-district records of being exported, if then get rid of the possibility of this zone as the pilot pollution zone; Otherwise, finish current handling process.
8, method according to claim 2 is characterized in that, before described steps A, this method further comprises:
After RNC receives the 1C measurement report that UE reports, start location survey, the positioning measurement result that record UE reports to UE.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2006100760787A CN100455095C (en) | 2006-04-27 | 2006-04-27 | Method for inspecting guide-frequency pollution |
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| CNB2006100760787A CN100455095C (en) | 2006-04-27 | 2006-04-27 | Method for inspecting guide-frequency pollution |
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| CN100455095C true CN100455095C (en) | 2009-01-21 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US9166875B2 (en) * | 2009-06-22 | 2015-10-20 | Qualcomm Incorporated | Method and apparatus for network optimization using SON solutions |
| CN102984720B (en) * | 2011-09-06 | 2017-12-22 | 中兴通讯股份有限公司 | Pilot pollution analysis method and device |
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| CN1482825A (en) * | 2002-09-12 | 2004-03-17 | 深圳市中兴通讯股份有限公司 | Method for monitoring pilot frequency contamination |
| WO2005060298A1 (en) * | 2003-12-12 | 2005-06-30 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and apparatus for allocating a pilot signal adapted to the channel characteristics |
| WO2005062647A1 (en) * | 2003-12-22 | 2005-07-07 | Telecom Italia S.P.A. | Method, system and computer program for planning a telecommunications network |
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2006
- 2006-04-27 CN CNB2006100760787A patent/CN100455095C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1482825A (en) * | 2002-09-12 | 2004-03-17 | 深圳市中兴通讯股份有限公司 | Method for monitoring pilot frequency contamination |
| WO2005060298A1 (en) * | 2003-12-12 | 2005-06-30 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and apparatus for allocating a pilot signal adapted to the channel characteristics |
| WO2005062647A1 (en) * | 2003-12-22 | 2005-07-07 | Telecom Italia S.P.A. | Method, system and computer program for planning a telecommunications network |
Non-Patent Citations (4)
| Title |
|---|
| 3rd Generation Partnership Project,Technical Specification Group Radio Access Network,Radio Resource Control (RRC),Protocol Specification(Release 7). 1123-1131，3GPP. 2006 |
| 3rd Generation Partnership Project,Technical Specification Group Radio Access Network,Radio Resource Control (RRC),Protocol Specification(Release 7). 1123-1131，3GPP. 2006 * |
| CDMA2000 1X的导频问题和相关参数. 薛建彬，陈海燕，张琦，袁占亭.兰州理工大学学报，第31卷第6期. 2005 |
| CDMA2000 1X的导频问题和相关参数. 薛建彬，陈海燕，张琦，袁占亭. 兰州理工大学学报，第31卷第6期. 2005 * |
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