CN102781022B - 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
GSM mobile radio communication is in develop rapidly period, and network capacity and number of users are all increasing sharply, and particularly in densely populated place region (as residential block, business business, factory), traffic total amount still grows steadily.
In order to meet ever-increasing market demand, absorb the traffic of growth as early as possible, while high-quality GSM900 network is built in continuation, also in the Large scale construction of carrying out GSM1800 network.For GSM900 network, through the extensive dilatation continued, network has reached the degree of very dense, and the space of dilatation is little; And utilizing GSM1800 and GSM900 frequency band to be non-interfering characteristic, development GSM1800 network just becomes the best means improving network capacity and quality.
In the dual-frequency network that current GSM1800 and GSM900 coexists, complicated and changeable due to network environment, traffic model is subject to the time, complicated change can occur in the impact of region and human factor, particularly the event such as festivals or holidays, occasion, equipment fault can make again the telephone traffic of certain specific region produce great change instantaneously, causes traffic distribution between dual-frequency network to occur that traffic tilts.
Existing dual-frequency network optimisation strategy is mainly based on parametric programming and hardware adjustment, need longer cycle and a large amount of optimization personnel, and the traffic load of dual-frequency network can not be monitored in real time, cause the cell portion of regional area that high half rate traffic (half rate traffic accounting is more than 30%), speech business high congestion occur, have a strong impact on network quality.And the pace of change of accident is unable to catch up with in artificial network adjustment far away, has a strong impact on user awareness.
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, for realizing dual-frequency network traffic automatic equalization.
The embodiment provides a kind of automatic optimization method of dual-frequency network interlayer parameter, comprising:
Automatically gather traffic measurement from traffic statistics storehouse, screen for described traffic measurement, obtain and need high traffic community to be processed;
Automatically and operation maintenance center OMC synchronized cells key parameter;
For needing high traffic community to be processed, from the adjacent area of described high traffic community, filtering out equalizing traffic volume Target cell according to described community key parameter, exporting equalizing traffic volume target cell list;
Obtain the redundancy capacity of described list small area and descending sort, the maximum community of redundancy capacity is equalizing traffic volume Target cell;
The output parameter carrying out equalizing traffic volume Target cell according to described community key parameter automatically performs adjustment, completes the passing of traffic, realizes dynamic equalizing traffic volume.
Parameter automatic optimization between the dynamic layer that the present invention proposes, is calculated by the traffic measurement of system, exports and needs to process high traffic community; By to candidate cell access performance, the assessment complete with high traffic cell association, capacity redundant ability and equipment working state, export best candidate cell, the parameter adjustment scheme that final output is best.Rounded system and the accurate account form of science, be that artificial optimization is irrealizable, greatly improve optimization efficiency and effect of optimization.
The present invention obtains every traffic measurement index from traffic statistics storehouse, cell parameter configuration is obtained from OMC database, high traffic load community is filtered out according to traffic measurement, the balanced community of target is filtered out by four steps from the adjacent area of high traffic load community, adjust finally by interlayer threshold value, cell telephone traffic between equalizing layer, reaches the object of overall equalizing traffic volume.
Accompanying drawing explanation
The automatic optimization method flow chart of the dual-frequency network interlayer parameter that Fig. 1 provides for the embodiment of the present invention.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, the present invention is described in further detail.
Traditional dual-frequency network optimisation strategy can not adapt to the pace of change of network, the present embodiment is based on real-time traffic statistics, propose dynamic adjustment dual-frequency network interlayer thresholding, improve the local high congestion of dual-frequency network existence and high half rate traffic problem, 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 present invention, comprises the following steps:
Step 101, automatically gather traffic measurement from traffic statistics storehouse.Can be 15 minutes statistics, also can be 60 minutes statistics, can self-definedly arrange (generally, default setting traffic measurement is 60 minutes dimensions).
Step 102, to screen for the traffic measurement gathered from traffic statistics storehouse.Meet being of any one condition following and need high traffic community to be processed:
Speech business congestion ratio TCH>0.1%, every line telephone traffic > Chao Mang community thresholding, half rate traffic ratio > high half rate traffic compare thresholding.TCH, every line telephone traffic, half rate traffic ratio obtain in traffic statistics storehouse.
Wherein, Chao Mang community thresholding and high half rate traffic than thresholding can based on experience value or the performance requirement of operator to dual-frequency network arrange flexibly.
Step 103, automatic and operation maintenance center (OMC) synchronized cells key parameter.Synchronous key parameter is needed to comprise: layer setting, layer thresholding and layer sluggishness (parameter can directly obtain from OMC database) etc.The setting of community key parameter decides cell telephone traffic absorbability, by amendment parameter, can carry out equilibrium to the traffic between high traffic community and adjacent area.Wherein, layer setting, layer thresholding, layer sluggishness are the important parameters of interlayer adjacent area equalizing traffic volume, and reasonably adjustment can utilize cell radio resource to greatest extent, improves the access performance of overall network, reduces overall half rate telephone traffic ratio.
Step 104, for needing high traffic community to be processed, from the adjacent area of high traffic community, filtering out equalizing traffic volume Target cell, exporting equalizing traffic volume target cell list.
Screening equalizing traffic volume Target cell is divided into Preliminary screening, postsearch screening, three screenings and four screenings.
1, in Preliminary screening, following all conditions need be met, equalizing traffic volume Target cell can be become: with high traffic cell merge number >100, switch success ratio >95%, switch accounting (adjacent area and high traffic cell merge number/high traffic community always switch number) TOP6(and draw according to maximum 6 adjacent areas of the switching times of high traffic community successively descending).
These 3 indexs are all obtain from traffic statistics storehouse, and the reason of three standards of formulation is:
Adjacent area and high traffic cell merge number >100: equalizing traffic volume is finally perform by switching, complete the transfer of high traffic community to adjacent area traffic, therefore, must there is certain common factor in high traffic community and adjacent area, just may carry out traffic passing and transfer;
Switch success ratio >95%: for ensureing the effect of equalizing traffic volume, higher handover success rate must be ensured between high traffic community and adjacent area;
Adjacent area and high traffic cell merge accounting TOP6: switching the highest adjacent area of accounting is the community the strongest with high traffic cell association, is the Target cell most possibly becoming final equalizing traffic volume.
Wherein take into full account that the community entering the list of equalizing traffic volume target cell candidates exists overlapping fully covering with high traffic community, met the possibility of equalizing traffic volume.
2, postsearch screening comprises, and can not meet following all conditions, then exclude the list of equalizing traffic volume target cell candidates:
Every line telephone traffic <=threshold value (different carrier configuration has different threshold value, in table 1), cell carrier frequencies configurable number (TRX) >=4, cutting off rate <2%.
Table 1
| Carrier configuration number | Chao Mang community 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 traffic statistics storehouse.
Wherein, consider the wireless capacity of Target cell, it is little that little allocating cell absorbs traffic space, not alternatively community;
Cell carrier frequencies configurable number identifies the capacity of each community, and community below 4 carrier frequency belongs to low allocating cell, and capacity is less, absorbs traffic capabilities little, redundancy traffic limited potential, not as the balanced community of target;
Cutting off rate identifies continuation and the speech quality index of community, the community that self continuation index is poor, not as the balanced community of target, otherwise easily makes Target cell become examination call drop worst cell (cutting off rate >3%).
3, three screenings comprise, and avoid indoor microcellulor and become equalizing traffic volume Target cell with layer community:
Cell transmit power (acquisition of OMC database) the general power <=33 in >33(microcellulor equipment community), or not in the list of Micro-cell, Ze Gai community is not indoor Micro-cell, can enter next step screening.Indoor microcellulor is due to for covering building traffic hot spot, and area coverage is limited, fast in cell edge signal attenuation, does not advise as equalizing traffic volume candidate cell, therefore eliminates the balanced cell list of target.
Also candidate list is excluded with layer community.Dual-frequency network planning principles be GSM1800 at 1 layer, GSM900 is at 2 layers, and Micro-cell, at 1 layer, the object of the invention is to realize equalizing traffic volume between dual-frequency network, so will get rid of with layer community.
4, in four screenings, the community that channel serviceability rate is low is got rid of:
Require channel serviceability rate (acquisition of traffic statistics storehouse) >90%, object to have the community of hardware problem, job insecurity to get rid of outside equalizing traffic volume Target cell, ensures equalizing traffic volume call continuation.
After executing above-mentioned flow process, export equalizing traffic volume target cell list.
Step 105, obtain the redundancy capacity of equalizing traffic volume target cell list small area, by community redundancy capacity descending sort, export final equalizing traffic volume target cell list, the maximum community of redundancy capacity is exactly 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) can obtain from traffic statistics storehouse, erlangB_traffic and erlangB_Dev is that erlangB shows correlation function, the former can calculate the maximum telephone traffic of little area carrier according to voice channel number and the percent of call lost, the latter can calculate channel demands quantity according to voice telephone traffic amount and the percent of call lost, and the percent of call lost is constant 2%.
Step 106, carry out equalizing traffic volume Target cell output parameter adjustment, complete the passing of traffic.
1, during high traffic community TCH congestion ratio <2%, illustrate that high traffic community exists slightly congested, adjustment step-length is 2:
If the balanced cell layer of target arranges (LAYER) < height traffic community LAYER, then balanced cell layer thresholding (LAYERTHR)+2 of target;
If target balanced community LAYER> height traffic community LAYER, then high traffic community LAYERTHR-2.Wherein, layer thresholding adjustment interval is [65,80], avoids extreme parameters to arrange.
2, during high traffic community TCH congestion ratio >=2%, illustrate that high traffic community exists heavy congestion, adjustment step-length is 4:
If the balanced community LAYER< height traffic community LAYER of target, target balanced cell layer thresholding LAYERTHR+4;
If target balanced community LAYER> height traffic community LAYER, high traffic cell layer thresholding LAYERTHR-4.
A layer thresholding is all there is, for determining to switch to/come a high-rise community between high-rise (GSM900) and low layer community (GSM1800).When the signal strength signal intensity of the community (GSM1800) at a low layer is lower than this threshold value, the normal switching of switchback low layer community a switching to high-rise community (GSM900) will be performed, until just can be had when low layer community (GSM1800) produces a signal strength signal intensity higher than corresponding threshold value to produce.Therefore, the layer thresholding of low layer community arranges the traffic absorbability that decide low layer community.
Low layer community arranges larger value as 70, and absorption signal intensity is higher than the user in-(70+ layer is sluggish) dBm; And layer threshold value is when being 60, absorption signal intensity is higher than the user in-(60+ layer is sluggish) dBm, cannot absorb-user between (60+ layer sluggish) and-(70+ layer sluggishness), therefore the layer thresholding of low layer community is strengthened, can improve the traffic absorbability of low layer community, high-rise community and low layer cell boarder traffic will be transferred to low layer community.Arranged by low layer cell layer thresholding, can agile equalization interlayer cellular traffic.
Parameter callback mechanism, the community adjusting parameter is performed above for final, no matter be the balanced community of high traffic community or target, after adjustment parameter, if the index of high traffic community continues 3 criteria thresholds that 3 periods do not reach step 102, then trigger layer threshold parameter readjustment, readjustment step-length is 1, until readjustment is arranged to the planning that this cell parameter is initial.
The present embodiment achieves parameter automatic optimization between dynamic layer, and be different from the mode that traditional artificial parameter is optimized completely, artificial parameter optimization needs a large amount of optimization personnel, and optimization efficiency and effect of optimization also depend on the network optimisation techniques ability of operator.And parameter automatic optimization does not need the "tactics of human sea" between dynamic layer, greatly reduce the dependence for optimizing engineering staff's quantity, Optimization Experience.
In a word, the foregoing is only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.
Claims (7)
1. an automatic optimization method for dual-frequency network interlayer parameter, is characterized in that, comprising:
Automatically gather traffic measurement from traffic statistics storehouse, screen for described traffic measurement, obtain and need high traffic community to be processed;
Automatically and operation maintenance center OMC synchronized cells key parameter;
For needing high traffic community to be processed, from the adjacent area of described high traffic community, filtering out equalizing traffic volume Target cell according to described community key parameter, exporting equalizing traffic volume target cell list;
Obtain the redundancy capacity of described list small area and descending sort, the maximum community of redundancy capacity is equalizing traffic volume Target cell;
The output parameter carrying out equalizing traffic volume Target cell or high traffic community according to described community key parameter automatically performs adjustment, completes the passing of traffic, realizes dynamic equalizing traffic volume; Described output parameter adjustment specifically comprises:
As high traffic community TCH congestion ratio <2%, adjustment step-length is 2: if the balanced cell layer of target arranges LAYER< height traffic community LAYER, then target balanced cell layer thresholding LAYERTHR+2; If target balanced community LAYER> height traffic community LAYER, then high traffic community LAYERTHR-2; Wherein, layer thresholding adjustment interval is [65,80];
As high traffic community TCH congestion ratio >=2%, adjustment step-length is 4: if the balanced community LAYER< height traffic community LAYER of target, the balanced community LAYERTHR+4 of target; If target balanced community LAYER> height traffic community LAYER, high traffic community LAYERTHR-4.
2. the automatic optimization method of dual-frequency network interlayer parameter according to claim 1, is characterized in that, describedly carries out screening specifically comprising for traffic measurement:
To meet in following condition at least one for needing high traffic communities to be processed: speech business congestion ratio TCH>0.1%, every line telephone traffic > Chao Mang community thresholding, half rate traffic ratio > high half rate traffic compare thresholding.
3. the automatic optimization method of dual-frequency network interlayer parameter according to claim 2, is characterized in that, described synchronous community key parameter comprises:
The layer setting obtained from OMC database, layer thresholding and layer are sluggish.
4. the automatic optimization method of the dual-frequency network interlayer parameter according to claim 1,2 or 3, is characterized in that, describedly from the adjacent area of high traffic community, filters out equalizing traffic volume Target cell specifically comprise:
Meet following all conditions, candidate's equalizing traffic volume Target cell can be become, add the list of equalizing traffic volume target cell candidates: with high traffic cell merge number >100, switch success ratio >95%, switch 6 the highest adjacent areas of accounting;
Following all conditions can not be met, then exclude the list of equalizing traffic volume target cell candidates: every line telephone traffic <=threshold value, cell carrier frequencies configurable number TRX>=4, cutting off rate <2%;
Indoor microcellulor Ji Tongceng community is avoided to become equalizing traffic volume Target cell;
Get rid of the community that channel serviceability rate is low: require channel serviceability rate >90%.
5. the automatic optimization method of dual-frequency network interlayer parameter according to claim 4, is characterized in that, described in avoid indoor microcellulor to become equalizing traffic volume Target cell method comprise:
Cell transmit power >33, or not in the list of Micro-cell.
6. the automatic optimization method of dual-frequency network interlayer parameter according to claim 5, is characterized in that, the redundancy capacity of described acquisition community 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 use number, TCH telephone traffic and PS equivalence telephone traffic to obtain from traffic statistics storehouse, erlangB_traffic and erlangB_Dev is that erlangB shows correlation function.
7. the automatic optimization method of dual-frequency network interlayer parameter according to claim 1, it is characterized in that, for high traffic community or the balanced community of target of described execution output parameter adjustment, after adjustment parameter, if the index of high traffic community lasting 3 periods are unrealized:
Speech business congestion ratio TCH>0.1%, every line telephone traffic > Chao Mang community thresholding, and half rate traffic ratio > high half rate traffic compares thresholding
Then trigger layer threshold parameter readjustment, readjustment step-length is 1, until readjustment is arranged to the planning that this cell parameter is initial.
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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 |
| WO2009046047A1 (en) * | 2007-10-02 | 2009-04-09 | Qualcomm Incorporated | Method and apparatus for performing inter-frequency handoff in a wireless communication network |
| CN102333346A (en) * | 2010-07-12 | 2012-01-25 | 中国移动通信集团内蒙古有限公司 | A load balancing method and system in a mobile communication system |
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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 |
| WO2009046047A1 (en) * | 2007-10-02 | 2009-04-09 | Qualcomm Incorporated | Method and apparatus for performing inter-frequency handoff in a wireless communication network |
| CN102333346A (en) * | 2010-07-12 | 2012-01-25 | 中国移动通信集团内蒙古有限公司 | A load balancing method and system in a mobile communication system |
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