CN102083107A - Method and system for optimizing wireless network - Google Patents
Method and system for optimizing wireless network Download PDFInfo
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- CN102083107A CN102083107A CN2009102529150A CN200910252915A CN102083107A CN 102083107 A CN102083107 A CN 102083107A CN 2009102529150 A CN2009102529150 A CN 2009102529150A CN 200910252915 A CN200910252915 A CN 200910252915A CN 102083107 A CN102083107 A CN 102083107A
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Abstract
The invention provides a method and system for optimizing a wireless network. The method comprises the steps of: counting cell pairs which have a frequency restriction relationship in the wireless network; obtaining connected clusters in the wireless network, wherein the connected clusters are cell sets of the wireless network and the frequency restriction relationship exists between any two cells in the cell sets; respectively obtaining the maximum connected cluster of each cell in the wireless network, wherein the maximum connected cluster is the connected cluster containing the maximum number of carrier waves in the connected clusters containing the cell; selecting the maximum connected cluster, containing the carrier waves with the number greater than the threshold of the number of carrier waves, from all the maximum connected clusters to obtain a connected cluster to be optimized; and carrying out coverage optimization and/or capacity optimization on the cells in the connected cluster to be optimized. By means of the method and the system for optimizing the wireless network, the three-dimensional equilibrium optimization of the coverage, the capacity and frequency interference of the wireless network are realized and the overall quality of the wireless network can be effectively promoted.
Description
Technical field
The invention belongs to moving communicating field, particularly a kind of radio network optimization method and system.
Background technology
The target of radio network optimization is to construct one " ideal network ", promptly all reaches the level of a balanced and reasonable in each side such as covering, capacity, quality, thereby reaches the optimum of network integral level.Prior art evaluates and optimizes wireless network from single dimension respectively.
1, existing wireless network coverage evaluating and optimization method
Reasonably the sub-district covering is the basis of high-quality network, be the Fundamentals that influence capacity and quality, ideally, can not be at the Serving cell that certain point terminal measures above three, and the signal strength signal intensity between Serving cell has tangible Gradient distribution, the stronger sub-district of signal strength signal intensity must be arranged as main Serving cell.Irrational covering is divided into the weak two kinds of situations that cover that cover and cross: weak covering refers to that the service signal level that certain point terminal measures is low excessively, influences the normal communication quality of terminal; The too small ability that also influences this sub-district absorption traffic simultaneously of coverage has reduced the capacity of sub-district.Cross that to cover be area covered, the signal that is meant a sub-district appears at the zone outside the planning, and this zone and source location have distance quite far away, even cross several sub-districts.Area covered may cause that cell telephone traffic is too high, frequency interferences is serious, produce island effect, cause wrong switching etc., has a strong impact on network quality.
Existing wireless network coverage evaluating method generally has two kinds of on-the-spot test and analysiss of statistical data.On-the-spot test is an angle of experiencing network service quality from the client, wireless coverage and quality to the network subrange are carried out in-site measurement, adopt special test equipment, imitation client's conversation behavior, and utilize data such as signal strength signal intensity in the software kit record test process, signal quality.Though the coverage evaluating method of on-the-spot test is accurate and visual, in general, can only collect the data on test route or the zone, the statistical regularity of data depends on the size of test specification and test job amount, and efficient is low, the cost height, statistical regularity is relatively poor.Therefore also can adopt the method assessment of analysis of statistical data to cover reasonability in the routine work, mainly be to utilize Network Element Function to collect terminal survey report in the existing network actual motion, and the sub-district that unreasonable covering may take place is inferred in addition statistical analysis.
Existing wireless network coverage optimization method generally has the antenna directional angle of adjustment, angle of declination, adjusts cell transmit power, changes antenna type or mounting means, newly-built repeater or base station etc.
2, existing wireless network capacitance assessment and optimization method
Reasonably cell capacity comprises utilance and two aspects of equilibrium degree, and the reasonable use rate is meant that the carrier number of sub-district can satisfy the telephone traffic of its carrying, data service user demand, and the half rate ratio is reasonable, the client perception that do not exert an influence congested.Reasonably equilibrium degree is the cell set at the specific region, and with standing in the same way adjacent area and handoff relation the most closely between the adjacent area, the professional difference of every line telephone traffic and every channel data is less, be evenly distributed.The unreasonable meeting of the capacity of sub-district causes traffic congestion, causes the half rate index too high, and voice quality descends, and paging is waited for long and caused paging success rate to cross low and carrier wave disposes problems such as too high intensification frequency planning difficulty.
Existing capacity evaluating method mainly is by analyzing the traffic measurement file of single subdistrict, gather indexs such as telephone traffic, data business volume, half rate ratio, congestion ratio, contrasting ERLANG B and judge.
Existing capacity optimization method mainly contains cover to be adjusted and two kinds of parameter adjustments.By adjusting the coverage of sub-district, rationally control the volume load of sub-district, by adjusting the parameter of sub-district,, regional cell set is carried out capacity equilibrium as cell reselection parameters, handoff parameter, half rate parameter and data service resource parameters.On the one hand Radio Resource is fully utilized, can alleviates the pressure of frequency planning on the other hand, network quality is improved.
3, existing wireless network frequency interferences assessment and optimization method
The quality of wireless network is subjected to the influence of many-sided factor, and wherein frequency interferences is one of key factor, so the prerequisite of discussing among the application is: cover, under the situation that capacity is identical, frequency interferences is more little, network quality is good more.The reasonable frequency operating position should be each frequency reusing degree equilibrium, the sub-district single frequency point is subjected to the adjacent traffic ratio of disturbing frequently less than 5% (empirical value).
Existing frequency interferences appraisal procedure mainly utilizes Network Element Function to collect terminal survey report in the existing network actual motion, in conjunction with the in addition statistical analysis of cell configuration frequency, calculates the traffic ratio of the interference between the subdistrict frequency point.
Mainly by changing frequency, the same neighbour's existing frequency interferences optimization method again and again who reduces between the neighbor cell counts, thereby reduces area interference traffic ratio.
As indicated above, prior art can realize from covering, capacity, the single dimension of frequency interferences wireless network being evaluated and optimized respectively.And cover, capacity, frequency interferences three be closely related, the mutual restriction that influences each other, single assessment and optimization method cause a certain dimension to reach rationally easily, but other dimension performances are still undesirable; Perhaps certain sub-district reaches perfect condition, but related cell is subjected to the unbalanced situation of negative effect around it.
Summary of the invention
Technical problem to be solved by this invention provides a kind of radio network optimization method and system, to realize the three-dimensional balance optimizing to covering, capacity and the frequency interferences of wireless network.
For solving the problems of the technologies described above, it is as follows to the invention provides technical scheme:
A kind of radio network optimization method comprises:
Add up and exist the sub-district of frequency limitation relation right in the described wireless network;
Obtain the connection bunch in the described wireless network, described connection bunch is the cell set of described wireless network, and has the frequency limitation relation in the described cell set between any two sub-districts;
Obtain each place, sub-district in the described wireless network respectively largest connected bunch, described largest connected bunch in the connection that comprises this sub-district bunch, the maximum connection of the carrier number that comprises bunch;
From all largest connected bunch, choose the carrier number that comprises largest connected family, obtain connection to be optimized bunch greater than the carrier number thresholding;
Coverage optimization and/or capacity optimization are carried out in sub-district in the described connection to be optimized bunch.
Above-mentioned radio network optimization method, wherein, the sub-district that has the frequency limitation relation in the described wireless network of described statistics is to comprising:
Obtain in the given time from the measurement report of terminal to report, the difference of Serving cell signal strength signal intensity and tested frequency signal strength signal intensity is less than the frequency of interference threshold, and, the frequency sum of in described Serving cell, measuring;
Calculate the ratio of described frequency and described frequency sum, obtain the area interference coefficient;
When described area interference coefficient during, determine to have the frequency limitation relation between the sub-district at described tested frequency place and the described Serving cell greater than first thresholding.
Above-mentioned radio network optimization method, wherein, the sub-district that has the frequency limitation relation in the described wireless network of described statistics is to comprising:
Obtain in the given time from the traffic file, the number of times that switches between first sub-district in the described wireless network and second sub-district obtains number second time;
When described second number during, determine to exist between described first sub-district and second sub-district frequency limitation relation greater than second thresholding.
Above-mentioned radio network optimization method, wherein, the sub-district that has the frequency limitation relation in the described wireless network of described statistics is to comprising:
Determine whether there is the frequency limitation relation between first sub-district in the described wireless network and second sub-district according to drive test data and/or frequency sweep data.
Above-mentioned radio network optimization method, wherein, coverage optimization is carried out in the sub-district in the described connection to be optimized bunch comprise:
Determine the mistake coverage cell in the described connection to be optimized bunch;
Adjust described antenna directional angle, angle of declination, the stand height and/or the transmitting power of coverage cell excessively, make that the coverage of described coverage cell excessively is reasonable.
Above-mentioned radio network optimization method, wherein, describedly determine that the mistake coverage cell in the described connection to be optimized bunch comprises:
To each sub-district in the described connection to be optimized bunch, there is the number of the sub-district that frequency limitation concerns in statistics with it;
When described number during, determine that this sub-district was a coverage cell greater than the 3rd thresholding.
Above-mentioned radio network optimization method, wherein, capacity optimization is carried out in the sub-district in the described connection to be optimized bunch comprise:
With the traffic of bunch border cell in the described connection to be optimized bunch and/or data service to bunch outside the sub-district share, to realize capacity equilibrium optimization;
After realizing that capacity equilibrium is optimized, from described connection to be optimized bunch, deduct the lower carrier wave of utilance.
A kind of radio network optimisation system comprises:
Frequency limitation concerns statistic unit, is used for adding up described wireless network and exists the sub-district of frequency limitation relation right;
Be communicated with bunch acquiring unit, be used for obtaining the connection bunch of described wireless network, described connection bunch be the cell set of described wireless network, and exists frequency limitation to concern in the described cell set between any two sub-districts;
Largest connected bunch of acquiring unit is used for obtaining respectively largest connected bunch of each place, sub-district of described wireless network, described largest connected bunch in the connection that comprises this sub-district bunch, the maximum connection of the carrier number that comprises bunch;
Connection to be optimized bunch acquiring unit is used for the largest connected family that chooses the carrier number that comprises greater than the carrier number thresholding from all largest connected bunch, obtains connection to be optimized bunch;
Network optimization unit is used for coverage optimization and/or capacity optimization are carried out in the sub-district of described connection to be optimized bunch.
Above-mentioned radio network optimisation system, wherein, described frequency limitation concerns in the statistic unit and comprises:
Measurement data is obtained subelement, be used for obtaining in the given time from the measurement report of terminal to report, the difference of Serving cell signal strength signal intensity and tested frequency signal strength signal intensity is less than the frequency of interference threshold, and, the frequency sum of in described Serving cell, measuring;
The interference coefficient computation subunit is used to calculate the ratio of described frequency and described frequency sum, obtains the area interference coefficient;
The first frequency restriction relation is determined subelement, is used for when described area interference coefficient during greater than first thresholding, determines to have the frequency limitation relation between the sub-district at described tested frequency place and the described Serving cell.
Above-mentioned radio network optimisation system, wherein, described frequency limitation concerns in the statistic unit and comprises:
Switch data obtains subelement, is used for obtaining in the given time from the traffic file, and the number of times that switches between first sub-district in the described wireless network and second sub-district obtains number second time;
The second frequency restriction relation is determined subelement, is used for determining to exist between described first sub-district and second sub-district frequency limitation relation when described second number during greater than second thresholding.
Above-mentioned radio network optimisation system, wherein, described frequency limitation concerns in the statistic unit and comprises:
Test data is obtained subelement, is used to obtain the drive test data and/or the frequency sweep data of described wireless network;
The 3rd frequency limitation relation is determined subelement, is used for determining whether there is the frequency limitation relation between first sub-district of described wireless network and second sub-district according to described drive test data and/or frequency sweep data.
Above-mentioned radio network optimisation system, wherein, the described network optimization comprises in the unit:
Cross coverage cell and determine subelement, be used for determining the mistake coverage cell of described connection to be optimized bunch;
The coverage optimization subelement is used to adjust described antenna directional angle, angle of declination, the stand height and/or the transmitting power of coverage cell excessively, makes that the coverage of described coverage cell excessively is reasonable.
Above-mentioned radio network optimisation system, wherein, the described coverage cell of crossing determines that subelement is further used for:
To each sub-district in the described connection to be optimized bunch, there is the number of the sub-district that frequency limitation concerns in statistics with it;
When described number during, determine that this sub-district was a coverage cell greater than the 3rd thresholding.
Above-mentioned radio network optimisation system, wherein, the described network optimization comprises in the unit:
The capacity equilibrium subelement, be used for the traffic of bunch border cell of described connection to be optimized bunch and/or data service to bunch outside the sub-district share, to realize capacity equilibrium optimization;
Carrier wave is optimized subelement, is used for after realizing that capacity equilibrium is optimized, and deducts the lower carrier wave of utilance from described connection to be optimized bunch.
The present invention is by the notion of largest connected bunch of introducing, to the cell set that forms largest connected bunch cover, capacity, the integrated of frequency interferences evaluate and optimize, promoted the oeverall quality of wireless network effectively, remedied prior art from single dimension, at the deficiency of network optimized approach and the instrument of single subdistrict.
Description of drawings
Fig. 1 is a largest connected bunch of schematic diagram in the embodiment of the invention;
Fig. 2 is the flow chart of the radio network optimization method of the embodiment of the invention;
Fig. 3 be the largest connected bunch of carrier number in the whole network 900M sub-district with adjacent frequency graph of a relation;
Fig. 4 is largest connected bunch of coverage optimization schematic diagram in the embodiment of the invention;
Fig. 5 is the structure chart of the radio network optimisation system of the embodiment of the invention.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, describe the present invention below in conjunction with the accompanying drawings and the specific embodiments.
In frequency optimization, if in two sub-district covering overlapping areas certain traffic is arranged, and the difference in signal strength of described two sub-districts 9dB or-9dB in, these two sub-districts just should be avoided frequently the time with frequently or frequently adjacent row, and it is right that these two sub-districts are called the sub-district that has frequency limitation to concern.As shown in Figure 1,, just link up, have the sub-district of frequency limitation relation all to link up all, so just constitute a figure with line with line if there is the frequency limitation relation sub-district and another sub-district.
Define one and be communicated with bunch, all have frequency limitation relation (promptly having line to connect) in bunch between any two sub-districts.
Define one largest connected bunch, in a plurality of connections at place, a sub-district bunch, the maximum connection of the carrier number that comprises (the carrier number sum of all sub-districts in this connection bunch) bunch is called largest connected bunch.
Such as comprising bunch having of " center cell 1 " among Fig. 1: (center cell 1, sub-district E, sub-district D); (center cell 1, sub-district D, sub-district C); (center cell 1, sub-district C, sub-district A); (center cell 1, sub-district A, sub-district B); (center cell 1, sub-district B, sub-district E); (center cell 1, sub-district A, sub-district E); (center cell 1, sub-district A, sub-district E, sub-district B).The carrier number of supposing each sub-district is identical, largest connected bunch that comprises " center cell 1 " like this is exactly (center cell 1, sub-district A, sub-district E, sub-district B), largest connected bunch that comprises sub-district A also is (center cell 1, sub-district A, sub-district E, sub-district B), and largest connected bunch that comprises sub-district C is (center cell 1, sub-district A, sub-district C).
In theory, if frequency resource can satisfy largest connected bunch of place, a sub-district, satisfy all that comprise this sub-district surely with regard to one so and be communicated with bunch.Therefore, in frequency optimization, in fact only need to pay close attention to largest connected bunch of place, sub-district.The present invention just is being based on the largest connected bunch of three-dimensional balance optimizing of realizing the covering to wireless network, capacity and frequency interferences.
With reference to Fig. 2, the radio network optimization method of the embodiment of the invention comprises the steps:
Step 201: it is right to add up the sub-district that exists frequency limitation to concern in the described wireless network;
The sub-district that the embodiment of the invention provides following three kinds of modes to add up and exists frequency limitation to concern in the described wireless network is right.
Mode one
Collect the terminal survey report in the existing network actual motion, in addition statistical analysis, thus determine whether there is the frequency limitation relation between the sub-district.Specifically comprise the steps:
S11: extract the measurement report that receive in the given time each sub-district respectively;
In gsm system, the every 480ms of terminal in the Serving cell sends to measurement report of BSC.Comprise in the measurement report: the signal strength signal intensity of Serving cell and quality, frequency, signal strength signal intensity, the BISC of 6 neighbor cells that signal is the strongest.
S12: get all measurement reports of one of them sub-district (being referred to as Serving cell), therefrom add up following two data:
NoReportsRelSS: in the described scheduled time, the difference of Serving cell signal strength signal intensity and tested frequency signal strength signal intensity is less than the frequency of interference threshold;
According to the GSM standard, with frequently C/I should be greater than 9dB, adjacent C/A frequently should be greater than-9dB, if promptly Serving cell and neighboring area signal strength difference are less than 9dB, can not use with frequency; If it is frequently adjacent that Serving cell and neighboring area signal strength difference less than-9dB, can not use.Therefore, described interference threshold comprises co-channel interference threshold value and adjacent interference threshold frequently, and for example, described co-channel interference threshold value is set to 9dB, and described adjacent interference threshold frequently is set to-9dB.Need to prove that the frequency is here added up at each tested frequency respectively, that is, and the corresponding frequency of each tested frequency;
NoReportsFreq: in the described scheduled time, the frequency sum of in described Serving cell, measuring.
The frequency that comprises in all measurement reports that Serving cell is received is counted addition, can obtain described frequency sum.
S13: calculate the ratio of described frequency and described frequency sum respectively, obtain the area interference coefficient;
This ratio is big more, illustrates that the relation between these two sub-districts is tight more.
S14:, determine to have the frequency limitation relation between the sub-district at described tested frequency place and the described Serving cell when described area interference coefficient during greater than first thresholding (X%).
X% can be self-defined, and meaning is the influence that the traffic of the about X% of Serving cell is subjected to the sub-district at described tested frequency place.The X% value is big more, and the sub-district number that comprises in calculate largest connected bunch is few more.
All sub-districts in the wireless network are carried out above-mentioned step S12～S14 respectively, just can obtain existing in the described wireless network all sub-districts of frequency limitation relation right.
In addition, also can directly from the analysis tool of existing adjacent sub-district, extract described NoReportsRelSS and NoReportsFreq.For example, (NCS) software is analyzed in the adjacent sub-district in the Operation ﹠ Maintenance System (OSS) that provides of Ericsson.
Mode two
How many direct tightness degree of reflection between the sub-district of switching times, by collecting the traffic file of existing network, whether in addition statistical analysis just can determine to exist between the sub-district frequency limitation to concern.Specifically comprise the steps:
S21: obtain in the given time from the traffic file, the number of times that switches between first sub-district in the described wireless network and second sub-district obtains number second time;
S22:, determine to exist between described first sub-district and second sub-district frequency limitation relation when described second number during greater than second thresholding (Y).
Y can be self-defined, and the Y value is big more, and the largest connected bunch of sub-district number that comprises that calculates is few more.
Mode three
Determine whether there is the frequency limitation relation between first sub-district in the described wireless network and second sub-district according to drive test data and/or frequency sweep data.
Need to prove, can adopt any one mode in above-mentioned three kinds of modes to add up and exist the sub-district of frequency limitation relation right in the described wireless network, also can adopt more than one combination in above-mentioned three kinds of modes to add up and exist the sub-district of frequency limitation relation right in the described wireless network.
Step 202: obtain the connection bunch in the described wireless network, described connection bunch is the cell set of described wireless network, and has the frequency limitation relation in the described cell set between any two sub-districts;
By execution in step 201, obtained whether existing between any two sub-districts in the wireless network frequency limitation relation, then,, just can get access in the described wireless network all and be communicated with bunch according to the definition that is communicated with bunch.
Step 203: obtain each place, sub-district in the described wireless network respectively largest connected bunch, described largest connected bunch in the connection that comprises this sub-district bunch, the maximum connection of the carrier number that comprises bunch;
Choosing a certain sub-district is center cell, and any minizone in twos that statistics comprises center cell is the cell cluster of restricted relation all, gets the maximum cell cluster of carrier number that comprises again, is largest connected bunch of described center cell correspondence.
Step 204: from all largest connected bunch, choose the carrier number that comprises largest connected family, obtain connection to be optimized bunch greater than the carrier number thresholding;
After getting access to largest connected bunch,, can assess largest connected bunch of carrier number and with the relation between the adjacent frequency in conjunction with cell carrier and frequency configuration.
Fig. 3 be the largest connected bunch of carrier number in the whole network 900M sub-district with adjacent frequency graph of a relation, abscissa is represented largest connected bunch carrier number among the figure, ordinate is represented to have in largest connected bunch of same carrier wave number with the mean value of adjacent frequency, and interference coefficient thresholding X% gets empirical value 3%.Just good more in the network with the few more quality of adjacent frequency, as can be seen from Figure,, also increase synchronously with adjacent frequency along with largest connected bunch carrier number increases.In order to reduce the same adjacent frequency of 900M sub-district, should reduce largest connected bunch carrier wave sum, if the largest connected bunch of carrier number in the sub-district of 900M can drop to below 60, drop to below 5 with adjacent frequency in basic can ensure bunch, reduce with adjacent frequency, can effectively reduce interference, promote network quality.
According to above-mentioned analysis, utilize largest connected bunch can evaluate and optimize to wireless network.Be specially: from all largest connected bunch, choose the carrier number that comprises largest connected family greater than carrier number thresholding (N), the carrier wave number is greater than N's in largest connected bunch, think and to satisfy the network quality requirement, but its be in the nature cover or capacity unreasonable, need to be optimized adjustment, therefore, these largest connected bunch of will choose of the present invention is as connection to be optimized bunch.Wherein, N is self-defining threshold value, and for example, the N value is 50～70.
Step 205: coverage optimization and/or capacity optimization are carried out in the sub-district in the described connection to be optimized bunch.
The purpose of coverage optimization is by the control area covered, the sub-district number in reducing bunch; The purpose of capacity optimization is deducting the lower carrier wave of utilance by analysis, the carrier number in reducing bunch.
Wherein, coverage optimization being carried out in the sub-district in the described connection to be optimized bunch specifically comprises:
S31: determine the mistake coverage cell in the described connection to be optimized bunch;
Can adopt prior art to determine coverage cell.In addition, the present invention also provides following mode to determine coverage cell:
To each sub-district in the described connection to be optimized bunch, there is the number of the sub-district that frequency limitation concerns in statistics with it;
When described number during, determine that this sub-district was a coverage cell greater than the 3rd thresholding (thresholding is counted in the adjacent area).
If certain sub-district and too much adjacent area all produce restriction relation (can described the 3rd thresholding be set in conjunction with the network concrete condition), think that then the covering of this sub-district is unreasonable, should optimize the situation that it crosses covering.
S32: adjust described antenna directional angle, angle of declination, the stand height and/or the transmitting power of coverage cell excessively, make that the coverage of described coverage cell excessively is reasonable.
As shown in Figure 4, largest connected bunch of center cell 1 place is (center cell 1, sub-district A, sub-district B, sub-district E), if there was the sub-district that covers the sub-district in bunch, with sub-district B covering was arranged such as center cell 1, can take to press antenna, fall the coverage that the high measure in station reduces center cell 1 and sub-district B, eliminate the restriction relation of two minizones, at this moment largest connected bunch of center cell 1 place has just been reduced by a sub-district.
Wherein, capacity optimization being carried out in the sub-district in the described connection to be optimized bunch specifically comprises:
S41: with the traffic of bunch border cell in the described connection to be optimized bunch and/or data service to bunch outside the sub-district share, to realize capacity equilibrium optimization;
For carrier number largest connected bunch greater than threshold value, the traffic of analytic manifold border cell, data service whether can to bunch outside the sub-district equilibrium share, or share to the closer alien frequencies section sub-district of relation.Frequency resource as GSM900M is nervous, the Xiang Gongzhan balanced business in sub-district of 1800M frequency range in the same way of can generating strategy.Can gather the indexs such as traffic, data service, half rate ratio, congestion ratio of sub-district from the traffic measurement database, it is right that analysis can be implemented the sub-district that capacity equilibrium optimizes; From basic information database, gather the relevant parameter configuration of sub-district gravity treatment, switching, provide one group of parameter value optimizing and revising suggestion in conjunction with the network optimization empirical value.
S42: after realizing that capacity equilibrium is optimized, from described connection to be optimized bunch, deduct the lower carrier wave of utilance.
After optimizing by capacity equilibrium, the optimization aim sub-district in largest connected bunch will produce the situation that the carrier wave configuration is higher than actual traffic demand, and can directly deduct unnecessary carrier wave this moment, reduces and join the frequency difficulty.Can from the traffic measurement database, gather the indexs such as traffic, data service, half rate ratio, congestion ratio of sub-district, use the carrier wave adjustment algorithm and assess, notr busy carrier wave is provided off-load ripple optimization suggestion.
After having carried out the optimization of coverage optimization and capacity, the frequency interferences in the wireless network has also just obtained optimization simultaneously.
So far, once finish based on largest connected bunch wireless network 3 D stereo prioritization scheme flow process.The network optimization personnel can implement the bright circulation of wearing of this scheme (PDCA) according to actual conditions, and network quality is continued assessment and improvement.
Correspondingly, the embodiment of the invention also provides a kind of radio network optimisation system.With reference to Fig. 5, described radio network optimisation system comprises: frequency limitation concerns statistic unit, is communicated with bunch acquiring unit, largest connected bunch of acquiring unit, connection to be optimized bunch acquiring unit and network optimization unit.Wherein:
Frequency limitation concerns statistic unit, is used for adding up described wireless network and exists the sub-district of frequency limitation relation right.Corresponding to three kinds of modes among the method embodiment, below provide three kinds of concrete structures that described frequency limitation concerns statistic unit.
Structure one
Described frequency limitation concerns in the statistic unit and comprises:
Measurement data is obtained subelement, be used for obtaining in the given time from the measurement report of terminal to report, the difference of Serving cell signal strength signal intensity and tested frequency signal strength signal intensity is less than the frequency of interference threshold, and, the frequency sum of in described Serving cell, measuring;
The interference coefficient computation subunit is used to calculate the ratio of described frequency and described frequency sum, obtains the area interference coefficient;
The first frequency restriction relation is determined subelement, is used for when described area interference coefficient during greater than first thresholding, determines to have the frequency limitation relation between the sub-district at described tested frequency place and the described Serving cell.
Structure two
Described frequency limitation concerns in the statistic unit and comprises:
Switch data obtains subelement, is used for obtaining in the given time from the traffic file, and the number of times that switches between first sub-district in the described wireless network and second sub-district obtains number second time;
The second frequency restriction relation is determined subelement, is used for determining to exist between described first sub-district and second sub-district frequency limitation relation when described second number during greater than second thresholding.
Structure three
Described frequency limitation concerns in the statistic unit and comprises:
Test data is obtained subelement, is used to obtain the drive test data and/or the frequency sweep data of described wireless network;
The 3rd frequency limitation relation is determined subelement, is used for determining whether there is the frequency limitation relation between first sub-district of described wireless network and second sub-district according to described drive test data and/or frequency sweep data.
Be communicated with bunch acquiring unit, be used for obtaining the connection bunch of described wireless network, described connection bunch be the cell set of described wireless network, and exists frequency limitation to concern in the described cell set between any two sub-districts.After in having obtained wireless network, whether having frequency limitation relation between any two sub-districts,, just can get access in the described wireless network all and be communicated with bunch according to the definition that is communicated with bunch.
Largest connected bunch of acquiring unit is used for obtaining respectively largest connected bunch of each place, sub-district of described wireless network, described largest connected bunch in the connection that comprises this sub-district bunch, the maximum connection of the carrier number that comprises bunch.Choosing a certain sub-district is center cell, and any minizone in twos that statistics comprises center cell is the cell cluster of restricted relation all, gets the maximum cell cluster of carrier number that comprises again, is largest connected bunch of described center cell correspondence.
Connection to be optimized bunch acquiring unit is used for the largest connected family that chooses the carrier number that comprises greater than the carrier number thresholding from all largest connected bunch, obtains connection to be optimized bunch.
Network optimization unit is used for coverage optimization and/or capacity optimization are carried out in the sub-district of described connection to be optimized bunch.
The purpose of coverage optimization is by the control area covered, the sub-district number in reducing bunch; The purpose of capacity optimization is deducting the lower carrier wave of utilance by analysis, the carrier number in reducing bunch.
Particularly, comprise in the described network optimization unit:
Cross coverage cell and determine subelement, be used for determining the mistake coverage cell of described connection to be optimized bunch;
The coverage optimization subelement is used to adjust described antenna directional angle, angle of declination, the stand height and/or the transmitting power of coverage cell excessively, makes that the coverage of described coverage cell excessively is reasonable.
The described coverage cell of crossing determines that subelement is further used for:
To each sub-district in the described connection to be optimized bunch, there is the number of the sub-district that frequency limitation concerns in statistics with it;
When described number during, determine that this sub-district was a coverage cell greater than the 3rd thresholding.
Particularly, comprise in the described network optimization unit:
The capacity equilibrium subelement, be used for the traffic of bunch border cell of described connection to be optimized bunch and/or data service to bunch outside the sub-district share, to realize capacity equilibrium optimization;
Carrier wave is optimized subelement, is used for after realizing that capacity equilibrium is optimized, and deducts the lower carrier wave of utilance from described connection to be optimized bunch.
In sum, the present invention is by the notion of largest connected bunch of introducing, to the cell set that forms largest connected bunch cover, capacity, the integrated of frequency interferences evaluate and optimize, promoted the oeverall quality of wireless network effectively, remedied prior art from single dimension, at the deficiency of network optimized approach and the instrument of single subdistrict.
In the narration of the foregoing description, be to be example, but the present invention is not limited only to gsm system, is equally applicable to code division multiple access systems such as TD-SCDMA, CDMA2000, WCDMA with the GSM network.In code division multiple access system, above-mentioned frequency interferences notion is replaceable to be " frequency and scrambling interference ", and the capacity notion is replaceable to be " capacity of particular traffic type ".
Should be noted that at last, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement technical scheme of the present invention, and not breaking away from the spiritual scope of technical solution of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (14)
1. a radio network optimization method is characterized in that, comprising:
Add up and exist the sub-district of frequency limitation relation right in the described wireless network;
Obtain the connection bunch in the described wireless network, described connection bunch is the cell set of described wireless network, and has the frequency limitation relation in the described cell set between any two sub-districts;
Obtain each place, sub-district in the described wireless network respectively largest connected bunch, described largest connected bunch in the connection that comprises this sub-district bunch, the maximum connection of the carrier number that comprises bunch;
From all largest connected bunch, choose the carrier number that comprises largest connected family, obtain connection to be optimized bunch greater than the carrier number thresholding;
Coverage optimization and/or capacity optimization are carried out in sub-district in the described connection to be optimized bunch.
2. radio network optimization method as claimed in claim 1 is characterized in that, the sub-district that has the frequency limitation relation in the described wireless network of described statistics is to comprising:
Obtain in the given time from the measurement report of terminal to report, the difference of Serving cell signal strength signal intensity and tested frequency signal strength signal intensity is less than the frequency of interference threshold, and, the frequency sum of in described Serving cell, measuring;
Calculate the ratio of described frequency and described frequency sum, obtain the area interference coefficient;
When described area interference coefficient during, determine to have the frequency limitation relation between the sub-district at described tested frequency place and the described Serving cell greater than first thresholding.
3. radio network optimization method as claimed in claim 1 is characterized in that, the sub-district that has the frequency limitation relation in the described wireless network of described statistics is to comprising:
Obtain in the given time from the traffic file, the number of times that switches between first sub-district in the described wireless network and second sub-district obtains number second time;
When described second number during, determine to exist between described first sub-district and second sub-district frequency limitation relation greater than second thresholding.
4. radio network optimization method as claimed in claim 1 is characterized in that, the sub-district that has the frequency limitation relation in the described wireless network of described statistics is to comprising:
Determine whether there is the frequency limitation relation between first sub-district in the described wireless network and second sub-district according to drive test data and/or frequency sweep data.
5. radio network optimization method as claimed in claim 1 is characterized in that, coverage optimization is carried out in the sub-district in the described connection to be optimized bunch comprise:
Determine the mistake coverage cell in the described connection to be optimized bunch;
Adjust described antenna directional angle, angle of declination, the stand height and/or the transmitting power of coverage cell excessively, make that the coverage of described coverage cell excessively is reasonable.
6. radio network optimization method as claimed in claim 5 is characterized in that, describedly determines that the mistake coverage cell in the described connection to be optimized bunch comprises:
To each sub-district in the described connection to be optimized bunch, there is the number of the sub-district that frequency limitation concerns in statistics with it;
When described number during, determine that this sub-district was a coverage cell greater than the 3rd thresholding.
7. as claim 1 or 5 described radio network optimization methods, it is characterized in that, capacity optimization carried out in the sub-district in the described connection to be optimized bunch comprise:
With the traffic of bunch border cell in the described connection to be optimized bunch and/or data service to bunch outside the sub-district share, to realize capacity equilibrium optimization;
After realizing that capacity equilibrium is optimized, from described connection to be optimized bunch, deduct the lower carrier wave of utilance.
8. a radio network optimisation system is characterized in that, comprising:
Frequency limitation concerns statistic unit, is used for adding up described wireless network and exists the sub-district of frequency limitation relation right;
Be communicated with bunch acquiring unit, be used for obtaining the connection bunch of described wireless network, described connection bunch be the cell set of described wireless network, and exists frequency limitation to concern in the described cell set between any two sub-districts;
Largest connected bunch of acquiring unit is used for obtaining respectively largest connected bunch of each place, sub-district of described wireless network, described largest connected bunch in the connection that comprises this sub-district bunch, the maximum connection of the carrier number that comprises bunch;
Connection to be optimized bunch acquiring unit is used for the largest connected family that chooses the carrier number that comprises greater than the carrier number thresholding from all largest connected bunch, obtains connection to be optimized bunch;
Network optimization unit is used for coverage optimization and/or capacity optimization are carried out in the sub-district of described connection to be optimized bunch.
9. radio network optimisation system as claimed in claim 8 is characterized in that, described frequency limitation concerns in the statistic unit and comprises:
Measurement data is obtained subelement, be used for obtaining in the given time from the measurement report of terminal to report, the difference of Serving cell signal strength signal intensity and tested frequency signal strength signal intensity is less than the frequency of interference threshold, and, the frequency sum of in described Serving cell, measuring;
The interference coefficient computation subunit is used to calculate the ratio of described frequency and described frequency sum, obtains the area interference coefficient;
The first frequency restriction relation is determined subelement, is used for when described area interference coefficient during greater than first thresholding, determines to have the frequency limitation relation between the sub-district at described tested frequency place and the described Serving cell.
10. radio network optimisation system as claimed in claim 8 is characterized in that, described frequency limitation concerns in the statistic unit and comprises:
Switch data obtains subelement, is used for obtaining in the given time from the traffic file, and the number of times that switches between first sub-district in the described wireless network and second sub-district obtains number second time;
The second frequency restriction relation is determined subelement, is used for determining to exist between described first sub-district and second sub-district frequency limitation relation when described second number during greater than second thresholding.
11. radio network optimisation system as claimed in claim 8 is characterized in that, described frequency limitation concerns in the statistic unit and comprises:
Test data is obtained subelement, is used to obtain the drive test data and/or the frequency sweep data of described wireless network;
The 3rd frequency limitation relation is determined subelement, is used for determining whether there is the frequency limitation relation between first sub-district of described wireless network and second sub-district according to described drive test data and/or frequency sweep data.
12. radio network optimisation system as claimed in claim 8 is characterized in that, the described network optimization comprises in the unit:
Cross coverage cell and determine subelement, be used for determining the mistake coverage cell of described connection to be optimized bunch;
The coverage optimization subelement is used to adjust described antenna directional angle, angle of declination, the stand height and/or the transmitting power of coverage cell excessively, makes that the coverage of described coverage cell excessively is reasonable.
13. radio network optimisation system as claimed in claim 12 is characterized in that, the described coverage cell of crossing determines that subelement is further used for:
To each sub-district in the described connection to be optimized bunch, there is the number of the sub-district that frequency limitation concerns in statistics with it;
When described number during, determine that this sub-district was a coverage cell greater than the 3rd thresholding.
14., it is characterized in that the described network optimization comprises in the unit as claim 8 or 12 described radio network optimisation system:
The capacity equilibrium subelement, be used for the traffic of bunch border cell of described connection to be optimized bunch and/or data service to bunch outside the sub-district share, to realize capacity equilibrium optimization;
Carrier wave is optimized subelement, is used for after realizing that capacity equilibrium is optimized, and deducts the lower carrier wave of utilance from described connection to be optimized bunch.
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