CN102123429A - Method for assessing coverage rationality of mobile communication base station - Google Patents
Method for assessing coverage rationality of mobile communication base station Download PDFInfo
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- CN102123429A CN102123429A CN2011100718367A CN201110071836A CN102123429A CN 102123429 A CN102123429 A CN 102123429A CN 2011100718367 A CN2011100718367 A CN 2011100718367A CN 201110071836 A CN201110071836 A CN 201110071836A CN 102123429 A CN102123429 A CN 102123429A
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Abstract
The invention relates to the field of mobile communication technologies, in particular relating to a method for assessing the coverage rationality of a mobile communication base station. The method comprises the following steps: firstly, collecting measurement result records and neighborhood support measurement data during the communication process of a mobile subscriber and gathering data of traffic handover; and secondly, screening out cells at which time lead is too big, the portion of downlink weak signal traffics is over high or the portion of downlink traffics with bad quality is over large; screening out cells which detects a greater number of other cells according to the neighbor support measurement data; and screening out main cells in which a greater number of neighbor cells having handover application number exist according to the statistical data of traffic handover. By utilizing the method, the coverage condition of the mobile communication base station can be assessed effectively in real time without the influence from geographical factors or other factors, therefore, an operator can timely get information about the condition of a mobile communication network and reasonably appoint personnel for network optimization.
Description
Technical field
The present invention relates to the mobile communication technology field, be specifically related to a kind of assessment mobile communication base station and cover rational method.
Background technology
Development along with mobile communications network, mobile network's scale of mobile communication carrier is increasing, how in real time, comprehensively, effectively network configuration becomes increasingly complex, assess the base station and cross the problem of covering and in time mobile communications network is optimized and seems more and more important.
Cross covering and be meant the coverage that has surpassed network settings, the phenomenon of crossing covering is exactly signaling congestion and owing to disturbs the call drop and the switching of TCH switch type that bring frequent.In addition, it also was a kind of phenomenon that covers that the base station does not have available LCCH, and occurrence probability is not high relatively.
At present, the method that covering is crossed in the assessment base station generally adopts the mode of Drive Test, also claims drive test, or the coverage test of driving, and is a kind of method of measuring wireless network performance when driving along certain road driving.In DT, simulate the actual user, constantly upload or download the file of different sizes,, obtain some indexs of network performance by the statistical analysis of testing software.Mobile communication carrier is the test service quality, all can customaryly arrange general every year third party's professional test company carry out Drive Test to network quality, and provides decision references for the network optimization.But, Drive Test must use special equipment to test at the scene by person skilled and can assess this Local Area Network coverage condition, because on-the-spot test has expended a large amount of time, human and material resources etc., reduced the efficient of assessment network coverage situation to a certain extent.
Summary of the invention
The objective of the invention is to defective, provide a kind of mobile communication base station of in real time, comprehensively, effectively assessing to cover rational method at prior art.
Technical scheme of the present invention is as follows: a kind of assessment mobile communication base station covers rational method, and measurement data is supported in measurement result record, the adjacent area of at first collecting in the mobile communication subscriber communication process, and adds up switching traffic data; Then,
According to the measurement result record data, filter out Timing Advance and cross sub-district far away, the too high sub-district of descending weak signal traffic ratio, the too high sub-district of descending matter difference traffic ratio;
Support measurement data according to the adjacent area, filter out and measure the too much sub-district of other number of cells;
According to switching the traffic measurement data, filter out the too much main plot of number, adjacent sub-district of handover request number.
Further, aforesaid assessment mobile communication base station covers rational method, wherein, when crossing sub-district far away according to measurement result record data screening time lead, the excessive standard of Timing Advance is: Timing Advance surpasses 10% more than or equal to 3 ratio, and maximum time lead greater than 7 sub-district.
Further, aforesaid assessment mobile communication base station covers rational method, and wherein, when screening the too high sub-district of descending weak signal traffic ratio according to the measurement result record data, the computing formula of descending weak signal traffic ratio is as follows:
Descending weak signal traffic ratio less than 2% be normal cell; Between 2-5% is the weak signal sub-district; Between 5%-15% is serious weak signal sub-district; Surpass 15% be serious weak signal sub-district.
Further, aforesaid assessment mobile communication base station covers rational method, and wherein, when screening the too high sub-district of descending matter difference traffic ratio according to the measurement result record data, the computing formula of descending matter difference traffic ratio is as follows:
Descending matter difference traffic ratio less than 5% be normal cell; Between 5%-10% is matter difference sub-district; Between 10%-20% is serious matter difference sub-district; Surpass 20% be serious matter difference sub-district.
Further, aforesaid assessment mobile communication base station covers rational method, wherein, the principle of supporting the measurement data screening to measure the too much sub-district of other number of cells according to the adjacent area is: according to measuring local network condition, choose all sub-districts identical with assessing cell scenario, other sub-district numbers that each sub-district of choosing is measured carry out sum-average arithmetic, with resulting mean value as imposing a condition, in measurement data is supported in the adjacent area, have the sub-district measure other sub-district numbers surpass this set point 20% the time, think that promptly to measure other number of cells too much.
Further, aforesaid assessment mobile communication base station covers rational method, wherein, go out to have the principle of the too much main plot of the adjacent sub-district number of handover request number to be according to switching the traffic measurement data screening: according to measuring local network condition, choose all sub-districts identical with assessing cell scenario, there is the adjacent sub-district number of handover request number to carry out sum-average arithmetic each sub-district of choosing, with resulting mean value as imposing a condition, surpass 20% o'clock of this set point as the adjacent sub-district of handover request number number, think that promptly the adjacent sub-district number that the handover request number is arranged of this main plot is too much.
Beneficial effect of the present invention is as follows: the measurement of correlation data message when the present invention can converse according to mobile communication subscriber, in real time, effectively assess the coverage condition of mobile communication base station.Just can assess the network coverage as long as gather measurement of correlation data and traffic measurement, not be subjected to the influence of region and other factors, make operator can in time understand the mobile communications network situation, rationally the arrangement personnel carry out the network optimization.
Description of drawings
Fig. 1 is that base station provided by the present invention covers reasonability appraisal procedure flow chart.
Embodiment
Describe the present invention below in conjunction with embodiment and accompanying drawing.
When mobile communication subscriber is conversed by mobile communications network, can between network, transmit various signalings.Can carry relevant data, information etc. in the signaling.Can utilize these related datas, information to assess the reasonability that the mobile communication base station covers.
The present invention taken all factors into consideration the base station cover with mobile phone to metrical information that network reports and switch getting in touch between adding up, at first collect MRR (measurement result record), NCS (adjacent area support) measurement data in the mobile communication subscriber communication process, measurement result and switching statistics are analyzed.According to these measurement results and switching statistics, sub-district far away, NCS cross coverage cell, the too high sub-district of descending weak signal traffic ratio, the too high sub-district of descending matter difference traffic ratio, switch the too much sub-district of number, adjacent area excessively to filter out TA (Timing Advance).
Measurement result record MRR (Measurement Result Recording) is used to write down all the wireless communication measurement reports that BSC received in special time and the scope, have 5 contents in the MRR surveying record, comprise uplink and downlink signals intensity, uplink and downlink signals quality, up-downgoing path loss, TA, the BTS/MS transmitting power of measuring the sub-district.By Target cell is carried out the MRR surveying record, can obtain more detailed sub-district up-downgoing wireless messages.
The adjacent area supports that NCS (Neighbouring Cell Support) is exactly the data of compiling after the cell localization computing.In communication process, because move around the user mobile phone must be switched between the sub-district, the operation method that decision is switched is a location algorithm.NCS is exactly some data that are recorded in the calculating process of location, these data are base unit with BCCH/BSIC, mainly comprise: the measurement report number in carrying out the NCS measuring process, become six number of times of strong sub-district and corresponding signal strength signal intensity, average signal strength etc.The signal strength signal intensity that NCS utilizes user's mobile phone to remove to measure the measurement frequency of definition, and the measurement frequency of definition can be the frequency of non-neighbor cell, can help the user to go to be the adjacent sub-district of each the little area definition in the network based on accurate measurement report like this.
As shown in Figure 1, specific implementation of the present invention is as follows:
At first, gather MRR, NCS measurement data and switching traffic measurement; Read MRR measurement data, NCS measurement data then respectively, and switch the traffic measurement data; According to the MRR measurement data, filter out TA and cross sub-district far away, the too high sub-district of descending weak signal traffic ratio, the too high sub-district of descending matter difference traffic ratio; Support measurement data according to the adjacent area, filter out and measure the too much sub-district of other number of cells; According to switching the traffic measurement data, filter out the too much main plot of number, adjacent sub-district of handover request number; At last, gather above-mentioned every sub-district that filters out, classified these sub-districts as coverage cell.
Realize that key technology scheme of the present invention is the above-mentioned various determination methods of crossing coverage cell are introduced respectively below.
One, MRR data TA crosses determining of sub-district far away
Timing Advance TA (Timing Advance) comprises 6 binary systems, and numerical value is 0-63, and unit is a transmitted symbol, i.e. 3.69 μ s.Be 63*3.68=233 μ s at Timing Advance, suitable electric wave transmission 35KM's toward between inverse time.From this point, it is 35KM that the sub-district of gsm system covers maximum radius.
Transmission has delay to signal in the space, move to direction during calling out as travelling carriage away from the base station, the arrival travelling carriage that the signal that sends from the base station will " more and more slower " then, meanwhile, the signal of travelling carriage also can " more and more slower " the arrival base station, postponing the signal of certain travelling carriage on this time slot that long meeting causes the base station to be received can't be correctly decoded, even the signal slot of other travelling carriages of the next one that may need receive with the base station is overlapped, causes between time slot and disturbs.Therefore, during calling is carried out, travelling carriage is issued the time delay value that carries moving table measuring on the measurement report header of base station, and the time that the necessary supervising connections for calling in base station arrives, and on down channel, send instruction to travelling carriage with 480ms frequency once, the time that the indication travelling carriage sends in advance, this time is exactly TA (Timing Advance).
For sub-district, zone, city, the excessive standard of the TA that the present invention determines is: TA surpasses 10% more than or equal to 3 ratio, and maximum TA is greater than 7 sub-district.Promptly classified coverage cell as if surpass the sub-district of this standard.
Two, the too high sub-district of descending weak signal traffic ratio determines
In mobile communication system, the upward signal link is meant the signal link that travelling carriage is sent out, receive the base station; The downstream signal link is meant the signal link that the base station is sent out, travelling carriage is received.
In the MRR statistics, the number of winning the confidence intensity Rxlevel＜-94dbm be weak signal traffic sample, promptly
Descending weak signal traffic ratio less than 2% be normal cell; Between 2-5% is the weak signal sub-district; Between 5%-15% is serious weak signal sub-district; Surpass 15% be serious weak signal sub-district.
Three, the too high sub-district of descending matter difference traffic ratio determines
In test, the value of signal quality Rxqual has reflected the quality of speech quality, the actual signal error rate that is meant of signal quality, and rank is the 0-7 level.
In the MRR statistics, the number of winning the confidence quality Rxqual＞4 be matter difference traffic sample, and definition matter difference traffic ratio:
Descending matter difference traffic ratio less than 5% be normal cell; Between 5%-10% is matter difference sub-district; Between 10%-20% is serious matter difference sub-district; Surpass 20% be serious matter difference sub-district.
Four, NCS crosses determining of coverage cell
In the NCS data, if certain cell signal is arrived by other cell measurements, the connection relation will be arranged between these two sub-districts then, also can there be interactional relation simultaneously.Therefore, when other sub-district numbers of testing certain sub-district reached some, then this sub-district existed the possibility of area covered just very big, just may cause interference to other sub-districts.Therefore when reaching certain value, other sub-district numbers just it was classified as coverage cell for there being the sub-district to measure among the NCS.This occurrence that measures other sub-district numbers will be chosen all sub-districts identical with assessing cell scenario according to the local networks situation, and other sub-district numbers that each sub-district of choosing is measured carry out sum-average arithmetic, obtain the occurrence of above-mentioned Rule of judgment.In measurement data is supported in the adjacent area, have the sub-district measure other sub-district numbers surpass this set point 20% the time, think that promptly to measure other number of cells too much.
Five, switch determining of the too much sub-district of number, adjacent area
Whether have the adjacent sub-district number of handover request number can probably assess out the main plot by statistics main plot and adjacent sub-district existed the covering phenomenon, if there is the adjacent sub-district number of handover request number more, illustrated then that there was the covering phenomenon in the main plot.This occurrence that switches the adjacent area number will be chosen all sub-districts identical with assessing cell scenario according to the local networks situation, has the adjacent sub-district number of handover request number to carry out sum-average arithmetic each sub-district of choosing, obtains the occurrence of above-mentioned Rule of judgment.Surpass 20% o'clock of this set point as the adjacent sub-district of handover request number number, think that promptly the adjacent sub-district number that the handover request number is arranged of this main plot is too much.
According to the above-mentioned five principles coverage evaluating was carried out in the base station in the mobile communications network, gathered the problem that every method filters out.
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 (8)
1. an assessment mobile communication base station covers rational method, it is characterized in that: measurement data is supported in measurement result record, adjacent area that this method is at first collected in the mobile communication subscriber communication process, and adds up switching traffic data; Then,
According to the measurement result record data, filter out Timing Advance and cross sub-district far away, the too high sub-district of descending weak signal traffic ratio, the too high sub-district of descending matter difference traffic ratio;
Support measurement data according to the adjacent area, filter out and measure the too much sub-district of other number of cells;
According to switching the traffic measurement data, filter out the too much main plot of number, adjacent sub-district of handover request number.
2. assessment as claimed in claim 1 mobile communication base station covers rational method, it is characterized in that: when crossing sub-district far away according to measurement result record data screening time lead, the excessive standard of Timing Advance is: Timing Advance surpasses 10% more than or equal to 3 ratio, and maximum time lead greater than 7 sub-district.
3. assessment as claimed in claim 1 mobile communication base station covers rational method, it is characterized in that: when screening the too high sub-district of descending weak signal traffic ratio according to the measurement result record data, the computing formula of descending weak signal traffic ratio is as follows:
4. assessment as claimed in claim 3 mobile communication base station covers rational method, it is characterized in that: descending weak signal traffic ratio less than 2% for normal cell; Between 2-5% is the weak signal sub-district; Between 5%-15% is serious weak signal sub-district; Surpass 15% be serious weak signal sub-district.
5. assessment as claimed in claim 1 mobile communication base station covers rational method, it is characterized in that: when screening the too high sub-district of descending matter difference traffic ratio according to the measurement result record data, the computing formula of descending matter difference traffic ratio is as follows:
6. assessment as claimed in claim 5 mobile communication base station covers rational method, it is characterized in that: descending matter difference traffic ratio less than 5% for normal cell; Between 5%-10% is matter difference sub-district; Between 10%-20% is serious matter difference sub-district; Surpass 20% be serious matter difference sub-district.
7. assessment as claimed in claim 1 mobile communication base station covers rational method, it is characterized in that: the principle of supporting the measurement data screening to measure the too much sub-district of other number of cells according to the adjacent area is: according to measuring local network condition, choose all sub-districts identical with assessing cell scenario, other sub-district numbers that each sub-district of choosing is measured carry out sum-average arithmetic, with resulting mean value as imposing a condition, in measurement data is supported in the adjacent area, have the sub-district measure other sub-district numbers surpass this set point 20% the time, think that promptly to measure other number of cells too much.
8. assessment as claimed in claim 1 mobile communication base station covers rational method, it is characterized in that: go out to have the principle of the too much main plot of the adjacent sub-district number of handover request number to be according to switching the traffic measurement data screening: according to measuring local network condition, choose all sub-districts identical with assessing cell scenario, there is the adjacent sub-district number of handover request number to carry out sum-average arithmetic each sub-district of choosing, with resulting mean value as imposing a condition, surpass 20% o'clock of this set point as the adjacent sub-district of handover request number number, think that promptly the adjacent sub-district number that the handover request number is arranged of this main plot is too much.
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| CN103634836A (en) * | 2013-12-05 | 2014-03-12 | 中国联合网络通信集团有限公司 | Cell coverage effectiveness assessment method and equipment |
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| CN104410978A (en) * | 2014-11-14 | 2015-03-11 | 中国联合网络通信集团有限公司 | Method and device of evaluating site planning |
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Application publication date: 20110713 |