CN102209336B - Neighbor cell optimizing method based on neighbor cell measurement - Google Patents
Neighbor cell optimizing method based on neighbor cell measurement Download PDFInfo
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- CN102209336B CN102209336B CN 201110140223 CN201110140223A CN102209336B CN 102209336 B CN102209336 B CN 102209336B CN 201110140223 CN201110140223 CN 201110140223 CN 201110140223 A CN201110140223 A CN 201110140223A CN 102209336 B CN102209336 B CN 102209336B
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Abstract
The invention discloses a neighbor cell optimizing method based on neighbor cell measurement. The method comprises the following steps of: firstly, inquiring a present network cell database and extracting a neighbor cell measuring result; and then, checking the type of the extracted neighbor cell measuring result and performing corresponding processing according to the type of neighbor cell measurement: for a defined neighbor cell measuring result, determining whether a tested neighbor cell is a defined neighbor cell or not, and if not, deleting the tested neighbor cell from a neighbor cell list; and for a non-defined neighbor cell measuring result, determining whether a tested neighbor cell is a non-defined neighbor cell or not, and if not, adding the tested neighbor cell into the neighbor cell list. By adopting the method disclosed by the invention, optimizing personnel can definitely and reasonably increase or decrease adjacency relations, and the cell switching success ratio and the user satisfaction degree are increased.
Description
Technical field
The present invention relates to the mobile communication technology field, be specifically related to a kind of adjacent area optimization method based on nearby region measurement.
Background technology
In wireless communication system, when travelling carriage from a residential quarter (coverage that refers to base station or base station) when moving to another residential quarter, need carry out channel for the not interrupt communication that keeps the mobile subscriber switches, how the residential quarter is also finished in success quickly switches, and is one of importance of cellular cell system design in the wireless communication system.The gsm system residential quarter is switched and to be based on that the up-downgoing test carries out, and handover request is based on the measurement report of descending mobile phone and the report of BTS out-hole run so the whether accurate performance that directly has influence on switching of measurement report.If the neighbouring relations definition too much, ACTIVE BA list (BCCH Allocation list BCCH frequency assignment list) is long, can make the accuracy of measurement report have a greatly reduced quality, and will cause certainty of measurement to descend; If the neighbouring relations definition is very few, ACTIVE BA tabulation is too short, and it is very few to cause the residential quarter to switch, and produces problems such as call drop, words lower tone.
NCS (Neighbouring Cell Support) is a miscellaneous function of Ericsson OSS system (Operation Support System operations support systems), is the optimization tool of neighbouring relations.This functional module is measured according to the up-downgoing of gsm system residential quarter the residential quarter switch data is analyzed, to find whether there are the fixed neighboring BS relationship of deciding, leak more.In simple terms, NCS is exactly the data of compiling after the cell localization computing, by the BA list of periodic variation residential quarter, in order to obtain measurement report to a large amount of measurement frequencies, gives and optimizes the engineer primary measuring data report is provided.So just can help the user to go to be the adjacent residential quarter of each the little area definition in the network based on accurate measurement report.Optimize through NCS, can increase more handover request more accurately, also can delete unnecessary neighboring BS relationship, thereby improve speech quality.Fixed neighbor cell may be need mended but this kind method can not directly show, when needs are handled lot of data, when handling the NCS data of a plurality of BSC simultaneously, then a large amount of time need be expended.
Summary of the invention
At the defective that exists in the prior art, the object of the present invention is to provide a kind of adjacent area optimization method based on nearby region measurement, reasonably increase or reduce neighbouring relations by this method, raising is optimized to power.
For achieving the above object, the technical solution used in the present invention is as follows:
A kind of adjacent area optimization method based on nearby region measurement may further comprise the steps:
(1) inquiry existing network cell data base is extracted the nearby region measurement result; Described database refers to Nokia's operations support systems traffic measurement database;
(2) check the nearby region measurement result's who extracts type, if definition nearby region measurement result then enters step (3); If non-definition nearby region measurement result then enters step (4);
(3) determine that whether tested adjacent area is the definition adjacent area, then should delete tested adjacent area if not from Neighboring Cell List; The concrete steps of confirming are as follows:
(3-1) the weighted level value SS_ADJ_P of the tested adjacent area of calculating, computing formula is: SS_ADJ_P=[(SS_SERV-DB1) * CLASS_1+SS_SERV * CLASS_2+ (SS_SERV-DB2) * CLASS_3]/(CLASS_1+CLASS_2+CLASS_3);
Wherein, SS_SERV represents the level of main Serving cell, sampling number when CLASS_1, CLASS_2 and CLASS_3 represent respectively that the difference of the descending average level intensity of main Serving cell and tested adjacent area is lower than DB1, the difference of intensity sampling number and the difference of the intensity sampling number when being higher than DB2 between DB1 and DB2, DB1 and DB2 are two given carrier/interface ratio values of system;
(3-2) the descending average level value SS_ADJ of the weighted level value SS_ADJ_P of more tested adjacent area and tested adjacent area, whether check the absolute value of difference greater than set point, then get the average of SS_ADJ_P and SS_ADJ if not as the final level intensity value of this tested adjacent area; Whether exist hardware fault or wireless parameter unreasonable if then check tested adjacent area, if after then fixing a breakdown or adjusting parameter, return step (31), then get the average of SS_ADJ_P and SS_ADJ if not as the final level intensity value of this tested adjacent area;
(3-3) whether check final level intensity value less than preset threshold, determine then that if not this tested adjacent area is the definition adjacent area; If the sampling number of then checking this tested adjacent area in the overall sampling number sum of all tested adjacent areas proportion whether less than the accounting value of setting, determine then that if not this tested adjacent area is the definition adjacent area, if determine that then this tested adjacent area is non-definition adjacent area, deletes it from Neighboring Cell List;
(4) determine that whether tested adjacent area is non-definition adjacent area, then should add in the Neighboring Cell List tested adjacent area if not; The concrete steps of confirming are as follows:
Whether check the descending average level value SS_NADJ of tested adjacent area greater than preset threshold, determine then that if not this tested adjacent area is non-definition adjacent area; If whether proportion is greater than the accounting value of setting in the overall sampling number sum of all tested adjacent areas for the sampling number of then checking this tested adjacent area, then it determines that this tested adjacent area is non-definition adjacent area if not, if execution in step (3-1)～(3-3) then.
Further, aforesaid adjacent area optimization method, in the step (3-1), described carrier/interface ratio value is by optimizing personnel setting, and its span is-63dBm～63dBm.
Further, aforesaid adjacent area optimization method, in the step (3-2), described set point is 20dBm.
Further, aforesaid adjacent area optimization method, in the step (3-3), described preset threshold is-85bBm to be-95dBm for grass roots for the area, cities and towns.
Further, aforesaid adjacent area optimization method, in the step (3-3), the accounting value of described setting is 0.03.
Further again, aforesaid adjacent area optimization method, in the step (4), described preset threshold is-90dBm.
Further, aforesaid adjacent area optimization method, in the step (4), the accounting value of described setting is 0.1.
Effect of the present invention is: method of the present invention adopts the method for weighted calculation and will define with the judgement of non-definition adjacent area tested adjacent area level value has carried out the procedure integration, by this method, can allow clear and definite which adjacent area of optimization personnel delete or to increase, improve the residential quarter handover success rate, reduced the switching call drop, improved speech quality and user satisfaction.
Description of drawings
Fig. 1 is the flow chart of a kind of adjacent area optimization method based on nearby region measurement of the present invention.
Embodiment
In order better to understand the present invention, at first association area knowledge involved in the present invention and main thought of the present invention are carried out concise and to the point introduction:
Pass through reasonably increase or reduce neighbouring relations as what introduce in the background technology, can play and improve handover success rate, minimizing switching call drop, the effect of raising user satisfaction.
NCS (Neighbouring Cell Support) is a miscellaneous function of Ericsson OSS system (Operation Support System operations support systems), and the optimization of neighboring BS relationship is that NCS substantially the most also is most important applications.NCS utilizes user's mobile phone to go to measure the signal strength signal intensity of the measurement frequency of definition, and the measurement frequency of definition can be the frequency of non-neighbor cell, so just can help the user to go to be the adjacent residential quarter of each the little area definition in the network based on measurement report, optimize through NCS, can increase more more accurate and trustworthy handover request, also can delete unnecessary neighboring BS relationship, thereby improve the performance of switching.Handover request is based on the measurement report of descending mobile phone and the report of BTS (base station transceiver) out-hole run, so whether accurate performance that directly has influence on switching of measurement report, if the adjacent area can make the accuracy of measurement report have a greatly reduced quality too much, if call drop is increased.NCS measures the interim measurement frequency that passes through the periodic variation residential quarter, obtains a large amount of measurement reports of measuring frequencies, very valuable original measurement report data is provided for the optimization engineer.Measurement report number and its average signal strength in the time of can demonstrating 1 to 6 of measured signal intensity row by the NCS measurement function, the concept that traditional use NCS carries out optimizing the adjacent area is that to think that a certain frequency becomes the number of reports of the last six more many, and its corresponding residential quarter just should be more important adjacent area.But facts have proved that there is defective in this method.Correct method should be total number of reports that the number of reports that will become the last 6 is measured to divided by this frequency, the ratio that draws is more high, the residential quarter that this frequency place is described is more important, and this residential quarter should be defined as neighboring BS relationship, can consider to delete the neighboring BS relationship of the low residential quarter, frequency place of other ratio.Optimize though can carry out the adjacent area by the NCS measurement, can not directly show and to mend fixed neighbor cell, when needs are handled lot of data, need expend a large amount of time.
Main thought of the present invention: the same with the Ericsson system, Nokia's equipment also can be opened the nearby region measurement function, be called DAC:defined adjacent cell measurement (definition nearby region measurement) and UNDEF_ADJ:undefined adjacent cell measurement (non-definition nearby region measurement) in the measurement function module respectively, corresponding measurement result leaves in respectively among table P_NBSC_DEF_ADJ_CELL and the P_NBSC_UNDEF_ADJ_CELL.Their cardinal principle is, in the regular hour, the frequency band alternately of regulation is joined among the BA List of free time of residential quarter (because BA List measures frequencies to deposit 32 at most only), carry out statistical summaries by collecting the measurement report of returning, can draw measurement report sum (and distinguish this residential quarter thus be that to have defined also be non-definition adjacent area), the population mean signal strength signal intensity of different B CCH frequency and BSIC combination, with and measurement report collect information such as duration.
DAC measures by two given C/I differences with respect to main clothes residential quarter of system tested adjacent area sampled point is divided into three intervals, be called NBR_OF_SAMPLES_IN_CLASS_1,2,3 (abbreviating CLASS_1,2,3 hereinafter as) in the P_NBSC_DEF_ADJ_CELL table respectively, two carrier/interface ratio values are called DB_VALUE_LOW and DB_VALUE_HIGH (hereinafter abbreviating DB1 and DB2 as).Sampling number when CLASS_1 represents that the difference of main clothes residential quarter and the descending level intensity in tested adjacent area is lower than DB1, CLASS_2 represents the sampling number of difference between DB1 and DB2 of main clothes and tested cell downlink level intensity, the sampling number when CLASS_3 represents then that the difference of main adjacent cell downlink level is higher than DB2.Certainly, also have BCCH, the BSIC of essential main plot and tested adjacent area among the DAC and in measuring period separately average downlink signal levels, abbreviate the main plot level as SS_SERV hereinafter, adjacent residential quarter level abbreviates SS_ADJ as.By inquiry Nokia's operations support systems (OSS) traffic measurement database, the data of DAC and UNDEF_ADJ are handled by program according to certain algorithm, then can draw the candidate cell list that need delete neighbouring relations, improve and optimize efficient.
With respect to DAC, the measurement of UNDEF_ADJ is fairly simple, has only one group of sampled point, does not classify.When therefore increasing neighbouring relations by UNDEF_ADJ stricter standard to be arranged.Abbreviate the descending level of non-definition adjacent area in the UNDEF_ADJ measurement as SS_NADJ.
The present invention is described in further detail below in conjunction with Figure of description and embodiment.
Fig. 1 shows the flow chart of a kind of adjacent area optimization method based on nearby region measurement of the present invention, and this method may further comprise the steps as can be seen from Figure:
Step S11: from database, extract the nearby region measurement result;
Inquiry existing network cell data base, namely the OSS of Nokia traffic measurement database extracts the nearby region measurement result from database.
Step S12: the type of checking the nearby region measurement result;
Check the nearby region measurement result's who extracts type, if definition nearby region measurement result then enters step S13; If non-definition nearby region measurement result then enters step S14.By in the narration of preamble as can be known, only divide two kinds for the nearby region measurement result, the data that extract from DAC table are definition nearby region measurement results, the data of extracting from UNDEF_ADJ are non-definition nearby region measurement results.In extracting the nearby region measurement result, at first need the type of definite measurement result of extracting.
Step S13: for the definition nearby region measurement, define determining of adjacent area, and non-definition adjacent area is deleted;
Determine that whether tested adjacent area is the definition adjacent area, then should delete tested adjacent area if not from Neighboring Cell List; The concrete steps of confirming are as follows:
The weighted level value SS_ADJ_P of i, the tested adjacent area of calculating, computing formula is: SS_ADJ_P=[(SS_SERV-DB1) * CLASS_1+SS_SERV * CLASS_2+ (SS_SERV-DB2) * CLASS_3]/(CLASS_1+CLASS_2+CLASS_3);
Wherein, SS_SERV represents the level of main Serving cell, sampling number when CLASS_1, CLASS_2 and CLASS_3 represent respectively that the difference of the descending average level intensity of main Serving cell and tested adjacent area is lower than DB1, the difference of intensity sampling number and the difference of the intensity sampling number when being higher than DB2 between DB1 and DB2, DB1 and DB2 are two given carrier/interface ratio values of system; Two carrier/interface ratio values all are that the optimization personnel oneself set as required, and how many hard and fast rule must be not, and span is all between-63dBm～63dBm.
The descending average level value SS_ADJ of the weighted level value SS_ADJ_P of ii, more tested adjacent area and tested adjacent area, whether check the absolute value of difference greater than set point, then get the average of SS_ADJ_P and SS_ADJ if not as the final level intensity value of this tested adjacent area; Whether exist hardware fault or wireless parameter unreasonable if then check tested adjacent area, if after then fixing a breakdown or adjusting parameter, return step I, then get the average of SS_ADJ_P and SS_ADJ if not as the final level intensity value of this tested adjacent area; Wherein, the general value of set point is 20dBm.
Iii, whether check final level intensity value less than preset threshold, determine then that if not this tested adjacent area is for defining the adjacent area; If the sampling number of then checking this tested adjacent area in the overall sampling number sum of all tested adjacent areas proportion whether less than the accounting value of setting, determine then that if not this tested adjacent area is the definition adjacent area, if determine that then this tested adjacent area is non-definition adjacent area, deletes it from Neighboring Cell List.Wherein, the general value of accounting value of setting is 0.03, and the general value of preset threshold is-85bBm to be-95dBm for grass roots for the area, cities and towns.
Step S14: for non-definition nearby region measurement, carry out determining of non-definition adjacent area, and determine according to the definition adjacent area.
Determine that whether tested adjacent area is non-definition adjacent area, then should add in the Neighboring Cell List tested adjacent area if not; The concrete steps of confirming are as follows:
Whether check the descending average level value SS_NADJ of tested adjacent area greater than preset threshold, determine then that if not this tested adjacent area is non-definition adjacent area; If whether proportion is greater than the accounting value of setting in the overall sampling number sum of all tested adjacent areas for the sampling number of then checking this tested adjacent area, then it determines that this tested adjacent area is non-definition adjacent area if not, if execution in step i～iii.Wherein, in this step, the general value of described preset threshold is-90dBm that the general value of described accounting value is 0.1.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technology thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (7)
1. adjacent area optimization method based on nearby region measurement may further comprise the steps:
(1) inquiry existing network cell data base is extracted the nearby region measurement result; Described database refers to Nokia's operations support systems traffic measurement database;
(2) check each the nearby region measurement result's who extracts type, if definition nearby region measurement result then enters step (3); If non-definition nearby region measurement result then enters step (4);
(3) determine that whether tested adjacent area is the definition adjacent area, then should delete tested adjacent area if not from Neighboring Cell List; The concrete steps of confirming are as follows:
(3-1) the weighted level value SS_ADJ_P of the tested adjacent area of calculating, computing formula is: SS_ADJ_P=[(SS_SERV-DB1) * CLASS_1+SS_SERV * CLASS_2+ (SS_SERV-DB2) * CLASS_3]/(CLASS_1+CLASS_2+CLASS_3);
Wherein, SS_SERV represents the level of main Serving cell, sampling number when CLASS_1, CLASS_2 and CLASS_3 represent respectively that the difference of the descending average level intensity of main Serving cell and tested adjacent area is lower than DB1, the difference of intensity sampling number and the difference of the intensity sampling number when being higher than DB2 between DB1 and DB2, DB1 and DB2 are two given carrier/interface ratio values of system;
(3-2) the descending average level value SS_ADJ of the weighted level value SS_ADJ_P of more tested adjacent area and tested adjacent area, whether check the absolute value of difference greater than set point, then get the average of SS_ADJ_P and SS_ADJ if not as the final level intensity value of this tested adjacent area; Whether exist hardware fault or wireless parameter unreasonable if then check tested adjacent area, if after then fixing a breakdown or adjusting parameter, return step (3-1), then get the average of SS_ADJ_P and SS_ADJ if not as the final level intensity value of this tested adjacent area;
(3-3) whether check final level intensity value less than preset threshold, determine then that if not this tested adjacent area is the definition adjacent area; If the sampling number of then checking this tested adjacent area in the overall sampling number sum of all tested adjacent areas proportion whether less than the accounting value of setting, determine then that if not this tested adjacent area is the definition adjacent area, if determine that then this tested adjacent area is non-definition adjacent area, deletes it from Neighboring Cell List;
(4) determine that whether tested adjacent area is non-definition adjacent area, then should add in the Neighboring Cell List tested adjacent area if not; The concrete steps of confirming are as follows:
Whether check the descending average level value SS_NADJ of tested adjacent area greater than preset threshold, determine then that if not this tested adjacent area is non-definition adjacent area; If whether proportion is greater than the accounting value of setting in the overall sampling number sum of all tested adjacent areas for the sampling number of then checking this tested adjacent area, then it determines that this tested adjacent area is non-definition adjacent area if not, if execution in step (3-1)～(3-3) then.
2. adjacent area as claimed in claim 1 optimization method, it is characterized in that: in the step (3-1), described carrier/interface ratio value is by optimizing personnel setting, and its span is-63dBm～63dBm.
3. adjacent area as claimed in claim 1 optimization method, it is characterized in that: in the step (3-2), described set point is 20dBm.
4. adjacent area as claimed in claim 1 optimization method, it is characterized in that: in the step (3-3), described preset threshold is-85bBm to be-95dBm for grass roots for the area, cities and towns.
5. adjacent area as claimed in claim 1 optimization method, it is characterized in that: in the step (3-3), the accounting value of described setting is 0.03.
6. adjacent area as claimed in claim 1 optimization method, it is characterized in that: in the step (4), described preset threshold is-90dBm.
7. as adjacent area as claimed in claim 1 optimization method, it is characterized in that: in the step (4), the accounting value of described setting is 0.1.
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| CN104427531B (en) * | 2013-08-29 | 2018-05-18 | 中国移动通信集团浙江有限公司 | A kind of neighbor cell optimizing method and device |
| CN103826244B (en) * | 2014-03-12 | 2017-08-25 | 北京格林耐特通信技术有限责任公司 | A kind of adjacent area additions and deletions method and apparatus |
| CN105992244A (en) * | 2015-01-27 | 2016-10-05 | 中兴通讯股份有限公司 | Neighboring cell optimization method and terminal |
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| CN101541009A (en) * | 2008-03-19 | 2009-09-23 | 中国移动通信集团公司 | Method, device and system for optimizing neighbor cell list |
| EP2154918A1 (en) * | 2008-08-13 | 2010-02-17 | Alcatel, Lucent | Decentralised method of handling a cell outage in a radiocommunication network |
| CN102026239A (en) * | 2010-12-16 | 2011-04-20 | 北京拓明科技有限公司 | Frequency optimization method based on measurement report |
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| CN101541009A (en) * | 2008-03-19 | 2009-09-23 | 中国移动通信集团公司 | Method, device and system for optimizing neighbor cell list |
| EP2154918A1 (en) * | 2008-08-13 | 2010-02-17 | Alcatel, Lucent | Decentralised method of handling a cell outage in a radiocommunication network |
| CN102026239A (en) * | 2010-12-16 | 2011-04-20 | 北京拓明科技有限公司 | Frequency optimization method based on measurement report |
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