CN102781022A - Method for automatically optimizing parametersamongdouble-frequency network layers - Google Patents
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Abstract
The invention discloses a method for automatically optimizing parameters among double-frequency network layers and belongs to the technical field of mobile communication. The method includes acquiring telephone traffic statistics from a telephone traffic statistics database, screening the telephone traffic statistics, and acquiring a high-telephone-traffic cell to be processed; synchronizing key parameters of the cell with an operation and maintenance center (OMC); screening out telephone-traffic balance target cells from adjacent cells of the high-telephone-traffic cell according to the key parameters of the cell and outputting a list of the telephone-traffic balance target cells targeted at the high-telephone-traffic cell to be processed; acquiring redundant capacity of cells on the list and arranging in a descending sort mode, and the cell with the largest redundant capacity is the telephone-traffic balance target cell; adjusting output parameters of the telephone-traffic balance target cells according to the key parameters of the cell and completing displacement of the telephone traffic. Based on real-time telephone-traffic statistics, thresholds among the double-frequency network layers are adjusted automatically and dynamically, local high jamming and high half-rate telephone traffic existing in the double-frequency network are improved, and automatic balance of the telephone traffic of the double-frequency network is realized.
Description
Technical field
The present invention relates to moving communicating field, particularly a kind of automatic optimization method of dual-frequency network interlayer parameter.
Background technology
The GSM mobile radio communication is in develop rapidly period, and network capacity and number of users are all increasing sharply, and particularly in personnel's close quarters (like the residential block, commercially be engaged in, factory), the traffic total amount still grows steadily.
In order to satisfy ever-increasing market demand, absorb the traffic that increases as early as possible, when continuing to build high-quality GSM900 network, also in the Large scale construction of carrying out the GSM1800 network.For the GSM900 network, through the extensive dilatation that continues, network has reached the degree of very dense, and the space of dilatation is little; And utilize GSM1800 and GSM900 frequency band is non-interfering characteristic, and development GSM1800 network just becomes the best means that improves network capacity and quality.
In the dual-frequency network of GSM1800 and GSM900 coexistence at present; Because network environment is complicated and changeable; The complicated variation can take place in receive traffic model time, region and artificial factor; Particularly incidents such as festivals or holidays, occasion, equipment fault can make telephone traffic moment of certain specific region produce great change again, cause that traffic appears in traffic distribution between dual-frequency network.
Existing dual-frequency network optimisation strategy is mainly based on parametric programming and hardware adjustment; Need long cycle and a large amount of optimization personnel; And can not monitor the traffic load of dual-frequency network in real time; Cause the part sub-district of regional area that high half rate traffic (half rate traffic accounting surpasses 30%), speech business high congestion take place, have a strong impact on network quality.And the artificial network adjustment pace of change of being unable to catch up with accident far away, have a strong impact on user's perception.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of automatic optimization method of dual-frequency network interlayer parameter, be used to realize dual-frequency network traffic automatic equalization.
Embodiments of the invention provide a kind of automatic optimization method of dual-frequency network interlayer parameter, comprising:
Automatically gather traffic measurement from the traffic measurement database, screen, obtain the high traffic sub-district that needs processing to said traffic measurement;
Automatically and the OMC of operation maintenance center synchronized cells key parameter;
High traffic sub-district to needs are handled filters out the equalizing traffic volume Target cell according to said sub-district key parameter from the adjacent area of said high traffic sub-district, the tabulation of output equalizing traffic volume Target cell;
Obtain the redundancy capacity and the descending sort of sub-district in the said tabulation, the maximum sub-district of redundancy capacity is the equalizing traffic volume Target cell;
The output parameter that carries out the equalizing traffic volume Target cell according to said sub-district key parameter automatically performs adjustment, accomplishes the passing of traffic, realizes dynamic equalizing traffic volume.
Parameter automatic optimization between the dynamic layer that the present invention proposes, through the traffic measurement calculating of system, output needs to handle high traffic sub-district; Through to the candidate cell access performance, with high traffic cell association property, capacity redundant ability and the complete assessment of equipment working state, the candidate cell that output is best, the best parameter adjustment scheme of final output.The accurate account form of rounded system and science is that the artificial optimization is irrealizable, has improved optimization efficiency greatly and has optimized effect.
The present invention obtains each item traffic measurement index from the traffic measurement database; Obtain the cell parameter configuration from the OMC database; Filter out high traffic load sub-district according to traffic measurement, from the adjacent area of high traffic load sub-district, filter out the balanced sub-district of target, at last through the adjustment of interlayer threshold value through four steps; Cell telephone traffic between equalizing layer reaches the purpose of whole equalizing traffic volume.
Description of drawings
The automatic optimization method flow chart of the dual-frequency network interlayer parameter that Fig. 1 provides for the embodiment of the invention.
Embodiment
For making the object of the invention, technical scheme and advantage clearer, the present invention is made further detailed description below in conjunction with accompanying drawing.
Traditional dual-frequency network optimisation strategy can not adapt to the pace of change of network; Present embodiment is based on real-time traffic statistics; Propose dynamic adjustment dual-frequency network interlayer thresholding, improve local high congestion and high half rate traffic problem that dual-frequency network exists, realize dual-frequency network traffic automatic equalization.
The automatic optimization method flow chart of the dual-frequency network interlayer parameter that Fig. 1 provides for the embodiment of the invention may further comprise the steps:
Speech business congestion ratio TCH>0.1%, every line telephone traffic ultra busy sub-district thresholding, half rate traffic ratio high half rate traffic compares thresholding.TCH, every line telephone traffic, half rate traffic ratio are obtained in the traffic measurement database.
Wherein, ultra busy sub-district thresholding and high half rate traffic can rule of thumb be worth than thresholding or the operator is provided with the performance requirement of dual-frequency network flexibly.
Screening equalizing traffic volume Target cell is divided into Preliminary screening, postsearch screening, three screenings and four screenings.
1, in the Preliminary screening; Need to satisfy following all conditions, can become the equalizing traffic volume Target cell: switch number with high traffic sub-district>100, the incision success rate 95%, switch accounting (number is always switched in adjacent area and switching number/high traffic sub-district, high traffic sub-district) TOP6 (according to drawing) with maximum 6 adjacent areas of the switching times of high traffic sub-district descending successively.
These 3 indexs all are from the traffic measurement database, to obtain, and the reason of three standards of formulation is:
Number is switched in adjacent area and high traffic sub-district>100: equalizing traffic volume finally is to carry out through switching, and accomplishes the transfer of high traffic sub-district traffic to the adjacent area, and therefore, must there be certain common factor in high traffic sub-district and adjacent area, just possibly carry out traffic and pass and shift;
The incision success rate>95%: for guaranteeing the effect of equalizing traffic volume, must guarantee higher handover success rate between high traffic sub-district and the adjacent area;
Accounting TOP6 is switched in adjacent area and high traffic sub-district: switching the highest adjacent area of accounting is and the strongest sub-district of high traffic cell association property to be the Target cell that most possibly becomes final equalizing traffic volume.
Wherein take into full account the sub-district and the high traffic sub-district that get into equalizing traffic volume Target cell candidate list and had sufficient overlapping covering, satisfied the possibility of equalizing traffic volume.
2, postsearch screening comprises, can not satisfy following all conditions, then excludes equalizing traffic volume Target cell candidate list:
Every line telephone traffic ≤threshold value (different carrier frequency dispose different threshold values, see table 1), cell carrier frequencies configurable number (TRX) >=4, cutting off rate < 2%.
Table 1
| The carrier frequency configurable number | Ultra busy sub-district threshold value |
| 1 | 0.379 |
| 2 | 0.569 |
| 3 | 0.659 |
| 4 | 0.714 |
| 5 | 0.751 |
| 6 | 0.778 |
| 7 | 0.800 |
| 8 | 0.817 |
| 9 | 0.831 |
| 10 | 0.843 |
| 11 | 0.853 |
| 12 | 0.862 |
Every line telephone traffic, cell carrier frequencies configurable number and cutting off rate can obtain from the traffic measurement database.
Wherein, consider the wireless capacity of Target cell, it is little that little allocating cell absorbs the traffic space, not as candidate cell;
The cell carrier frequencies configurable number is identifying the capacity of each sub-district, and the following sub-district of 4 carrier frequency belongs to low allocating cell, and capacity is less, and it is little to absorb traffic capabilities, and redundant traffic potentiality are limited, not as the balanced sub-district of target;
Cutting off rate is identifying the continuation and the speech quality index of sub-district, and self relatively poor sub-district of continuation index not as the balanced sub-district of target, otherwise makes Target cell become the poorest sub-district of examination call drop (cutting off rate>3%) easily.
3, three screenings comprise, avoid indoor microcellulor and become the equalizing traffic volume Target cell with layer sub-district:
Cell transmit power (the OMC database obtains)>33 (the general power in microcellulor equipment sub-district=33), perhaps not in the microcellulor cell list, then this sub-district is not indoor microcellulor sub-district, can get into next step screening.Indoor microcellulor is owing to be used to cover building traffic focus, and area coverage is limited, and is fast in cell edge signal attenuation, does not advise as the equalizing traffic volume candidate cell, therefore eliminates the balanced cell list of target.
Also exclude the candidate cell tabulation with layer sub-district.The dual-frequency network planning principles be GSM1800 at 1 layer, GSM900 is at 2 layers, the microcellulor sub-district the objective of the invention is to realize between the dual-frequency network equalizing traffic volume at 1 layer, so with the layer sub-district to get rid of.
4, in four screenings, get rid of the low sub-district of channel serviceability rate:
Require channel serviceability rate (the traffic measurement database obtains)>90%, purpose is that the sub-district that hardware problem, job insecurity are arranged is got rid of outside the equalizing traffic volume Target cell, guarantees equalizing traffic volume conversation continuation.
After executing above-mentioned flow process, the tabulation of output equalizing traffic volume Target cell.
Redundancy capacity=erlangB_traffic (TCH can use number-erlangB_Dev (TCH telephone traffic, 0.02)-PS equivalence telephone traffic, 0.02).
Wherein, TCH can use number, TCH telephone traffic and PS equivalence telephone traffic (data service busy channel number) to obtain from the traffic measurement database; ErlangB_traffic and erlangB_Dev are that the erlangB epiphase closes function; The former can calculate the maximum telephone traffic of little area carrier according to voice channel number and the percent of call lost, and the latter can calculate channel demands quantity according to the voice telephone traffic amount and the percent of call lost, and the percent of call lost is a constant 2%.
1, high traffic sub-district TCH congestion ratio 2% o'clock, it is slightly congested to explain that high traffic sub-district exists, the adjustment step-length is 2:
If the balanced cell layer setting (LAYER) of target < high traffic sub-district LAYER, the then balanced cell layer thresholding (LAYERTHR)+2 of target;
If the balanced sub-district LAYER of target>high traffic sub-district LAYER, then high traffic sub-district LAYERTHR-2.Wherein, layer thresholding adjustment interval is [65,80], avoids extreme parameter setting.
2, high traffic sub-district TCH congestion ratio >=2% o'clock, explain that there is heavy congestion in high traffic sub-district, the adjustment step-length is 4:
If the balanced sub-district LAYER of target is < high traffic sub-district LAYER, the balanced cell layer thresholding of target LAYERTHR+4;
If the balanced sub-district LAYER of target>high traffic sub-district LAYER, high traffic cell layer thresholding LAYERTHR-4.
Between high-rise (GSM900) and low layer sub-district (GSM1800), all there is a layer thresholding, is used to determine to switch to/come the sub-district of a high level.When the signal strength signal intensity in the sub-district of a low layer (GSM1800) is lower than this threshold value; Will carry out a switching, just can have the normal switching of switchback low layer sub-district to produce when (GSM1800) produces a signal strength signal intensity that is higher than corresponding threshold value up to the low layer sub-district to high-rise sub-district (GSM900).Therefore, the layer threshold setting of low layer sub-district determining the traffic absorbability of low layer sub-district.
The bigger value of low layer cell setting is as 70, and absorption signal intensity is higher than the user in-(the 70+ layer is sluggish) dBm; And layer threshold value is 60 o'clock; Absorption signal intensity is higher than the user in-(the 60+ layer is sluggish) dBm;-(60+ layer sluggish) can't absorb with-user between (70+ layer sluggishness); Therefore strengthen the layer thresholding of low layer sub-district, can improve the traffic absorbability of low layer sub-district, high-rise sub-district and low layer cell boarder traffic will be transferred to the low layer sub-district.Through the threshold setting of low layer cell layer, cell telephone traffic amount between equalizing layer flexibly.
The parameter callback mechanism; To the sub-district of top final execution adjustment parameter, no matter be the balanced sub-district of high traffic sub-district or target, after the adjustment parameter; If the index of high traffic sub-district continues 3 index thresholdings that 3 periods do not reach step 102; Then the trigger layer threshold parameter is adjusted back, and the readjustment step-length is 1, until adjusting back the initial planning setting of this cell parameter.
Present embodiment has been realized parameter automatic optimization between dynamic layer, is different from the mode of conventional artificial parameter optimization fully, and artificial parameter optimization needs a large amount of optimization personnel, and optimization efficiency and optimization effect also depend on operator's network optimization technical capability.And parameter automatic optimization does not need the "tactics of human sea" between dynamic layer, greatly reduces the dependence for optimizing project's teacher personnel amount, optimization experience.
In a word, the above is merely preferred embodiment of the present invention, is not to be used to limit protection scope of the present invention.
Claims (8)
1. the automatic optimization method of a dual-frequency network interlayer parameter is characterized in that, comprising:
Automatically gather traffic measurement from the traffic measurement database, screen, obtain the high traffic sub-district that needs processing to said traffic measurement;
Automatically and the OMC of operation maintenance center synchronized cells key parameter;
High traffic sub-district to needs are handled filters out the equalizing traffic volume Target cell according to said sub-district key parameter from the adjacent area of said high traffic sub-district, the tabulation of output equalizing traffic volume Target cell;
Obtain the redundancy capacity and the descending sort of sub-district in the said tabulation, the maximum sub-district of redundancy capacity is the equalizing traffic volume Target cell;
The output parameter that carries out equalizing traffic volume Target cell or high traffic sub-district according to said sub-district key parameter automatically performs adjustment, accomplishes the passing of traffic, realizes dynamic equalizing traffic volume.
2. the automatic optimization method of dual-frequency network interlayer parameter according to claim 1 is characterized in that, the said screening specifically to traffic measurement comprises:
The high traffic sub-district that meets in the following condition at least one: speech business congestion ratio TCH for needs processing>0.1%, every line telephone traffic ultra busy sub-district thresholding, half rate traffic ratio high half rate traffic compares thresholding.
3. the automatic optimization method of dual-frequency network interlayer parameter according to claim 2 is characterized in that, said synchronous sub-district key parameter comprises:
The layer setting, layer thresholding and the layer that from the OMC database, obtain are sluggish.
4. according to the automatic optimization method of claim 1,2 or 3 described dual-frequency network interlayer parameters, it is characterized in that the said equalizing traffic volume Target cell that from the adjacent area of high traffic sub-district, filters out specifically comprises:
Satisfy following all conditions, can become the equalizing traffic volume Target cell: switch number with high traffic sub-district>100, the incision success rate 95%, 6 the highest adjacent areas of switching accounting;
Can not satisfy following all conditions, then exclude equalizing traffic volume Target cell candidate list: every line telephone traffic ≤threshold value, cell carrier frequencies configurable number TRX >=4, cutting off rate < 2%;
Avoid indoor microcellulor and become the equalizing traffic volume Target cell with layer sub-district;
Get rid of the low sub-district of channel serviceability rate: require the channel serviceability rate>90%.
5. the automatic optimization method of dual-frequency network interlayer parameter according to claim 4 is characterized in that, the said method of avoiding indoor microcellulor to become the equalizing traffic volume Target cell comprises:
Cell transmit power>33, perhaps not in the microcellulor cell list.
6. the automatic optimization method of dual-frequency network interlayer parameter according to claim 5 is characterized in that, the said redundancy capacity that obtains the sub-district specifically comprises:
Redundancy capacity=erlangB_traffic (TCH can use number-erlangB_Dev (TCH telephone traffic, 0.02)-PS equivalence telephone traffic, 0.02)
Wherein, TCH can obtain from the traffic measurement database with number, TCH telephone traffic and PS equivalence telephone traffic, and erlangB_traffic and erlangB_Dev are that the erlangB epiphase closes function.
7. the automatic optimization method of dual-frequency network interlayer parameter according to claim 6 is characterized in that, said output parameter adjustment specifically comprises:
< 2% the time, the adjustment step-length is 2: if the balanced cell layer of target is provided with LAYER < high traffic sub-district LAYER, the then balanced cell layer thresholding of target LAYERTHR+2 when high traffic sub-district TCH congestion ratio; If the balanced sub-district LAYER of target>high traffic sub-district LAYER, then high traffic sub-district LAYERTHR-2; Wherein, layer thresholding adjustment interval is [65,80].
When high traffic sub-district TCH congestion ratio >=2% the time, the adjustment step-length is 4: if the balanced sub-district LAYER of target is < high traffic sub-district LAYER, the balanced sub-district LAYERTHR+4 of target; If the balanced sub-district LAYER of target>high traffic sub-district LAYER, high traffic sub-district LAYERTHR-4.
8. the automatic optimization method of dual-frequency network interlayer parameter according to claim 7; It is characterized in that; To the high traffic sub-district or the balanced sub-district of target of said execution output parameter adjustment, after the adjustment parameter,, the index of high traffic sub-district is unrealized if continuing 3 periods:
Speech business congestion ratio TCH>0.1%, every line telephone traffic ultra busy sub-district thresholding, and half rate traffic ratio high half rate traffic compares thresholding
Then the trigger layer threshold parameter is adjusted back, and the readjustment step-length is 1, until adjusting back the initial planning setting of this cell parameter.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105101298A (en) * | 2014-05-06 | 2015-11-25 | ***通信集团浙江有限公司 | Inter-cell telephone traffic equalization method and device, and server |
| CN106851736A (en) * | 2016-12-15 | 2017-06-13 | 北京拓明科技有限公司 | LTE adjacent areas parameter automatic optimization method based on load |
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| WO2009046047A1 (en) * | 2007-10-02 | 2009-04-09 | Qualcomm Incorporated | Method and apparatus for performing inter-frequency handoff in a wireless communication network |
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| CN1905745A (en) * | 2006-07-31 | 2007-01-31 | 亿阳信通股份有限公司 | Carrier configuration regulating method based on wireless network dynamic load capacity |
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