CN106851736A - LTE adjacent areas parameter automatic optimization method based on load - Google Patents
LTE adjacent areas parameter automatic optimization method based on load Download PDFInfo
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- CN106851736A CN106851736A CN201611157756.2A CN201611157756A CN106851736A CN 106851736 A CN106851736 A CN 106851736A CN 201611157756 A CN201611157756 A CN 201611157756A CN 106851736 A CN106851736 A CN 106851736A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/08—Load balancing or load distribution
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0055—Transmission or use of information for re-establishing the radio link
- H04W36/0061—Transmission or use of information for re-establishing the radio link of neighbour cell information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/16—Performing reselection for specific purposes
- H04W36/22—Performing reselection for specific purposes for handling the traffic
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses a kind of LTE adjacent areas parameter automatic optimization method based on load, belong to moving communicating field.The optimization method includes：Wireless performance index is gathered to LTE cells to be optimized, obtaining needs high load capacity cell to be processed；Synchronized cells key parameter；The low traffic load equalization target cell of correspondence, and outgoing traffic equalization target cell list are filtered out from the adjacent area of the high load capacity cell；The minimum cell of resource utilization is defined as traffic balancing Target cell；The output parameter for carrying out traffic balancing Target cell or high load capacity cell performs adjustment, the passage of finishing service automatically.The method is based on real-time performance data, realize the Automatic Optimal of the adjacent area parameter of LTE cells, effectively improve cell perception, compared with artificial optimization's mode, substantially increase local resource utilization rate, number of users and the optimization efficiency and effect of optimization of figureofmerit of handling up, better meet the application demand of user.
Description
Technical field
The invention belongs to mobile communication technology field, and in particular to a kind of LTE adjacent areas parameter automatic optimization based on load
Method.
Background technology
As the development of LTE network and the quick of 4G user gradually increase, hot spot region cell load also gradually rises, and uses
The uneven distribution at family causes cell portion high load capacity situation occur, and hot spot region cell uniform fold and single carrier can not
The demand of user is ensured, minizone covering is flexible and dual carrier deployment is more and more important.It is excellent by covering adjustment, parameter at present
The modes such as change, load balancing, resource capacity expansion need to launch in hot spot region, to lift network capacity.
Existing LTE load optimals strategy is based primarily upon parametric programming and hardware adjustment, it is necessary to cycle more long and a large amount of
Optimization personnel, and be unable to the traffic load of monitor in real time network, cause the cell portion of regional area that traffic load occurs
High, user rate is low, has a strong impact on network quality.And the change speed of accident is much unable to catch up with artificial network adjustment
Degree, has a strong impact on user's perception.
The content of the invention
In view of this, it is an object of the invention to be directed to problems of the prior art, there is provided a kind of based on load
LTE adjacent areas parameter automatic optimization method, the traffic load for realizing LTE network minizone is balanced.
Technical scheme is as follows：A kind of LTE adjacent areas parameter automatic optimization method based on load, including following step
Suddenly：
(1) from performance data northbound interface collection of server wireless performance index, carry calculation is carried out to all cells, is obtained
Taking needs high load capacity cell to be processed；
(2) with operation maintenance center OMC northbound interface server sync cell key parameters；
(3) for high load capacity cell to be processed is needed, according to the cell key parameter, from the neighbour of the high load capacity cell
The low traffic load equalization target cell of correspondence, and outgoing traffic equalization target cell list are filtered out in area；
(4) resource utilization of cell in the list is obtained, the minimum cell of resource utilization is defined as business equal
Weighing apparatus Target cell；
(5) carried out according to the cell key parameter output parameter of traffic balancing Target cell or high load capacity cell from
Dynamic to perform adjustment, the passage of finishing service realizes that dynamic service is balanced.
Further, the LTE adjacent areas parameter automatic optimization method based on load as described above, the height described in step (1)
Loaded cell need to simultaneously meet following 4 conditions：
80%>Resource utilization>30%th, 150>Effective RRC connections average>80th, handling capacity during busy cells>2GB, and it is small
Area's frequency exists【37750,38650】It is interval.
Further, the LTE adjacent areas parameter automatic optimization method based on load as described above, small described in step (2)
Area's key parameter includes：Neighboring BS relationship, the cell warp of the whole network cell are obtained from operation maintenance center OMC northbound interface servers
Degree, cell latitude, cell frequency, cell reselection are sluggish, same frequency switching is biased, alien frequencies switching is biased.
Further, the LTE adjacent areas parameter automatic optimization method based on load as described above, it is right to be filtered out in step (3)
Should low traffic load equalization target cell specifically include：
Meet following all conditions, traffic balancing Target cell can be turned into：Switch number with high load capacity cell>100th, cut
Success rate>99%th, 6 adjacent areas of switching accounting highest；
Following all conditions can not be met, then exclude traffic balancing target cell candidates list：RRC is created as power>
99%, ERAB are created as power>99%, resource utilization<15%, effective RRC connects average<50；
Avoiding indoor microcellulor turns into traffic balancing Target cell；
Exclude the cell of hardware alarm；
Exclude adjacent area of the distance more than 800 meters.
Further, the LTE adjacent areas parameter automatic optimization method based on load as described above, wherein, described interior
Microcellulor refers to：Cell frequency belongs to the cell of E frequency ranges, and frequency separation exists【38650,39650】Scope.
Further, the LTE adjacent areas parameter automatic optimization method based on load as described above, wherein, the hardware is accused
Alert cell refers to the alarm cell list in the alarm data that northbound interface is obtained.
Further, the LTE adjacent areas parameter automatic optimization method based on load as described above, wherein, described exclusion
Distance is more than the method for 800 meters of adjacent area：According to cell longitude, latitude, high load capacity cell and industry are calculated by trigonometric function
Business equalization target cell distance, excludes adjacent area of the distance more than 800 meters.
Further, the LTE adjacent areas parameter automatic optimization method based on load as described above, the money described in step (4)
Source utilization rate=MAX (up PRB utilization rates, descending PRB utilization rates).
Further, the resource utilization of cell is entered in ascending or descending in the list that will be obtained in step (4)
Row sequence, so that it is determined that the minimum cell of resource utilization.
Further, the LTE adjacent areas parameter automatic optimization method based on load as described above, joins in step (5) to output
Number carries out adjustment simultaneously, specifically includes：
1) reselection hysteresis of high load capacity cell, adjusting step 2 are reduced, reselection hysteresis adjustment interval is【1,24】, it is to avoid pole
End parameter setting；
2) the switching biasing of high load capacity cell and target equilibrium cell is reduced, adjusting step 2, adjustment is interval【0,24】.
Beneficial effects of the present invention are as follows：Handover between cells parameter automatic optimization method proposed by the present invention, by system
Performance data calculate, output need process high load capacity cell；By to candidate cell access performance and high load capacity cell association
Property, resource utilization and the complete assessment of equipment working state, export optimal candidate cell, the optimal parameter of final output
Adjusted Option.Rounded system and the accurate calculation of science, are irrealizable artificial optimizations, greatly improve optimization
Efficiency and effect of optimization.
The present invention obtains properties data target from performance data northbound interface server, from the service of OMC northbound interfaces
Device obtains cell parameter configuration, and high load capacity cell is filtered out according to performance data, and five steps are passed through from the adjacent area of high load capacity cell
Target equilibrium cell is filtered out, is adjusted finally by cell reselection and handoff threshold value, balanced high load capacity Zone reaches whole
The purpose of body traffic balancing.
Brief description of the drawings
Fig. 1 is the LTE adjacent areas parameter automatic optimization method flow chart based on load provided in an embodiment of the present invention.
Specific embodiment
The present invention is described in detail with reference to the accompanying drawings and examples.
Traditional high load capacity optimizing cells strategy has not adapted to the pace of change of network, and the present invention is based on real-time performance
Data, propose dynamic adjustment LTE adjacent areas parameter, improve local traffic load problem high present in LTE network, realize LTE
Network automatic equalization.
Fig. 1 is the LTE adjacent areas parameter automatic optimization method flow chart based on load provided in an embodiment of the present invention, the method
Comprise the following steps：
Step 101, the automatic collecting performance data from performance database.
Specifically, from performance data northbound interface collection of server wireless performance index, load gauge is carried out to all cells
Calculate.
Step 102, the performance data for the collection from performance database are screened.
Meeting being for following 4 conditions simultaneously needs high load capacity cell to be processed：
80%>Resource utilization>30%th, 150>Effective RRC connections average>80th, handling capacity during busy cells>2GB, and it is small
Area's frequency exists【37750,38650】It is interval.
Handling capacity is from performance number when up PRB utilization rates, descending PRB utilization rates, effective RRC connections average, busy cells
Obtained according to northbound interface server.
Resource utilization=MAX (up PRB utilization rates, descending PRB utilization rates), when resource utilization is more than 80%,
Adjacent area parameter optimization business cannot alleviate the high load capacity situation of cell, and it is high negative to optimize to take the mode that hardware resource is adjusted
Lotus scene.
Up PRB utilization rates, descending PRB utilization rates, effective RRC connect average, the thresholding of cell throughout can
Based on experience value or operator is flexibly set to LTE cell load demands.
Step 103 and operation maintenance center (OMC) northbound interface server sync the whole network cell key parameter.
Needing synchronous key parameter includes：Neighboring BS relationship, cell longitude, cell latitude, cell frequency, cell reselection are slow
Stagnant, cell switching biasing etc..The setting of cell key parameter decides Zone absorbability, by changing parameter, can be with
Equilibrium is carried out to the business between high load capacity cell and adjacent area.Wherein, it is adjacent area business that cell reselection is sluggish, cell switches biasing
Important parameter in a balanced way, rational adjustment can utilize local resource to greatest extent, improve the access performance of overall network, equilibrium
The load of minizone.
Step 104, for high load capacity cell to be processed is needed, traffic balancing mesh is filtered out from the adjacent area of high load capacity cell
Mark cell, outgoing traffic equalization target cell list.
Screening traffic balancing Target cell is divided into preliminary screening, postsearch screening, three screenings, four screenings and five sieves
Choosing.
1st, in preliminary screening, following all conditions need to be met, traffic balancing Target cell can be turned into：Cut with high load capacity cell
Change number>100th, switch success ratio>99%th, switching accounting (adjacent area and high load capacity cell switching number/high load capacity cell always switch number)
TOP6 (draws) according to the arrangement of 6 adjacent areas most with the switching times of high load capacity cell successively descending.
This 3 indexs are obtained from performance data northbound interface server, are the reason for three standards of formulation：
Adjacent area switches number with high load capacity cell>100：Traffic balancing is performed by gravity treatment and switching, completes high
Loaded cell elapses to adjacent area business, therefore, high load capacity cell and adjacent area there must be certain association and overlap covering, just may be used
Business passage and transfer can be carried out；
Switch success ratio>99%：To ensure the effect of traffic balancing, be must assure that between high load capacity cell and adjacent area higher
Handover success rate；
6 adjacent areas in adjacent area and high load capacity cell switching accounting highest：Switching accounting highest adjacent area is small with high load capacity
The most strong cell of area's relevance, is most possibly to turn into final service Target cell in a balanced way.
The cell wherein taken into full account into traffic balancing target cell candidates list exists abundant with high load capacity cell
Overlap covering, meet the possibility of traffic balancing.
2nd, postsearch screening includes, it is impossible to meet following all conditions, then exclude traffic balancing target cell candidates list:
RRC is created as power>99%, ERAB are created as power>99%, PRB utilization rate<15%, effective RRC connections are average
Number<50；
RRC is created as power, ERAB and is created as the access index that power identifies cell, itself access property index compared with
Poor cell, not as target equilibrium cell.
PRB utilization rate indexs identify the load condition of cell, and cell itself of the load higher than 15% has accessed more
User, if as target equilibrium cell, it is possible to cause the cell also turn into high load capacity cell.Effective RRC connections are average
Number identifies the number of users of cell, and LTE cells have maximum RRC to connect the limitation of number, if RRC connection numbers exceed limitation, uses
The connection that family carries out maximum times is attempted, and will be started RRC and is rebuild flow, and time delay is long to cause user to access, and influence user perceives.
3rd, three screenings include, it is to avoid indoor Micro-cell turns into traffic balancing Target cell：
Frequency belongs to E frequency ranges, and frequency exists【38650,39650】Scope, then the cell is indoor Micro-cell, no
Can be screened into next step.Indoor microcellulor is because for covering building traffic hotspots, area coverage is limited, in cell edge
Signal attenuation is fast, it is not recommended that used as traffic load equilibrium candidate cell, therefore eliminates target equilibrium cell list.
4th, in four screenings, the cell of hardware alarm is excluded：
It is required that excluding hardware alarm, it is therefore an objective to will there is hardware problem, the cell of job insecurity to exclude in traffic balancing mesh
Outside mark cell, it is ensured that the continuation after traffic balancing.
5th, five screenings, exclude adjacent area of the distance more than 800 meters：
According to high load capacity cell and adjacent area longitude and latitude, the distance of neighboring interval is calculated by trigonometric function.The earth is one
The spheroid of individual intimate standard, the km of mean radius 6371.004, if we assume that the earth is a perfect spheroid, then
Its radius is exactly the mean radius of the earth, is designated as R.If on the basis of 0 degree of warp, then according to earth surface any two points
Longitude and latitude can just calculate the surface distance of this point-to-point transmission.If the longitude and latitude of the first point A is (LonA, LatA), second point B
Longitude and latitude be (LonB, LatB), according to 0 degree of benchmark of warp, east longitude degree of learning from else's experience on the occasion of (Longitude), west longitude is learnt from else's experience
Degree negative value (- Longitude), north latitude takes 90- latitude values (90-Latitude), and south latitude takes 90+ latitude values (90+Latitude),
Then it is counted as (MLonA, MLatA) and (MLonB, MLatB) by 2 points after above-mentioned treating.So derived according to triangle,
The equation below of two point distances can be obtained calculating：
C=sin (MLatA) * sin (MLatB) * cos (MLonA-MLonB)+cos (MLatA) * cos (MLatB)
Distance=R*Arccos (C) * Pi/180 (km)
Exclude apart from Distance>0.8 adjacent area is used as candidate cell.
After having performed above-mentioned flow, outgoing traffic equalization target cell list.
Step 105, the resource utilization for obtaining cell in traffic balancing target cell list, by local resource utilization rate liter
Sequence sorts, and exports final service equalization target cell list, and the minimum cell of resource utilization is exactly traffic balancing Target cell.
Resource utilization=MAX (up PRB utilization rates, descending PRB utilization rates).
Wherein, up PRB utilization rates, descending PRB utilization rates can be obtained from performance data northbound interface server.
Step 106, the output parameter adjustment for carrying out traffic balancing Target cell, the passage of finishing service.The present embodiment is same
Shi Jinhang is adjusted as follows：
High load capacity cell：Reduce reselection hysteresis, adjusting step 2, adjustment is interval【1,24】
Target equilibrium cell：Judge high load capacity cell frequency and target cell frequency in a balanced way, if both frequencies are identical,
Then reduce with frequency switching biasing, adjusting step 2, adjustment is interval【0,24】；If both frequencies are different, two cell alien frequencies are illustrated,
Then reduce alien frequencies switching biasing, adjusting step 2, adjustment is interval【0,24】.
Parameter callback mechanism, for the final cell for performing adjusting parameter above, either high load capacity cell or target
Balanced cell, after adjusting parameter, if the index of high load capacity cell continues 3 indexs of 3 periods not up to step 102
Thresholding, then trigger parameter readjustment, readjustment step-length is 1, until readjustment is set to the initial planning of the cell parameter.
The present embodiment realizes the LTE adjacent areas parameter automatic optimization based on load, and traditional artificial parameter is different from completely
The mode of optimization, artificial parameter optimization needs substantial amounts of optimization personnel, and optimization efficiency and effect of optimization also depend on operator's
Network optimisation techniques ability.And dynamic adjacent area parameter automatic optimization does not need the "tactics of human sea", greatly reduce for optimization work
The dependence of Cheng Shi personnel amounts, Optimization Experience.
Obviously, those skilled in the art can carry out various changes and modification without deviating from essence of the invention to the present invention
God and scope.So, if these modifications of the invention and modification are belonged to the model of the claims in the present invention and its equivalent technology
Within enclosing, then the present invention is also intended to comprising these changes and modification.
Claims (10)
1. a kind of LTE adjacent areas parameter automatic optimization method based on load, comprises the following steps：
(1) from performance data northbound interface collection of server wireless performance index, all cells are carried out with carry calculation, obtaining needs
High load capacity cell to be processed；
(2) with operation maintenance center OMC northbound interface server sync cell key parameters；
(3) for high load capacity cell to be processed is needed, according to the cell key parameter, from the adjacent area of the high load capacity cell
Filter out the low traffic load equalization target cell of correspondence, and outgoing traffic equalization target cell list；
(4) resource utilization of cell in the list is obtained, the minimum cell of resource utilization is defined as traffic balancing mesh
Mark cell；
(5) output parameter for carrying out traffic balancing Target cell or high load capacity cell according to the cell key parameter is held automatically
Row adjustment, the passage of finishing service realizes that dynamic service is balanced.
2. the LTE adjacent areas parameter automatic optimization method of load is based on as claimed in claim 1, it is characterised in that：In step (1)
Described high load capacity cell need to simultaneously meet following 4 conditions：
80%>Resource utilization>30%th, 150>Effective RRC connections average>80th, handling capacity during busy cells>2GB, and cell is frequently
Rate exists【37750,38650】It is interval.
3. the LTE adjacent areas parameter automatic optimization method of load is based on as claimed in claim 1 or 2, it is characterised in that：Step
(2) the cell key parameter described in includes：The neighbour of the whole network cell is obtained from operation maintenance center OMC northbound interface servers
Cell relation, cell longitude, cell latitude, cell frequency, cell reselection are sluggish, same frequency switching is biased, alien frequencies switching is biased.
4. the LTE adjacent areas parameter automatic optimization method of load is based on as claimed in claim 1 or 2, it is characterised in that：Step
(3) the low traffic load equalization target cell of correspondence is filtered out in specifically include：
Meet following all conditions, traffic balancing Target cell can be turned into：Switch number with high load capacity cell>100th, cut successfully
Rate>99%th, 6 adjacent areas of switching accounting highest；
Following all conditions can not be met, then exclude traffic balancing target cell candidates list：RRC is created as power>99%,
ERAB is created as power>99%, resource utilization<15%, effective RRC connects average<50；
Avoiding indoor microcellulor turns into traffic balancing Target cell；
Exclude the cell of hardware alarm；
Exclude adjacent area of the distance more than 800 meters.
5. the LTE adjacent areas parameter automatic optimization method of load is based on as claimed in claim 4, it is characterised in that：Described room
Interior microcellulor refers to：Cell frequency belongs to the cell of E frequency ranges, and frequency separation exists【38650,39650】Scope.
6. the LTE adjacent areas parameter automatic optimization method of load is based on as claimed in claim 4, it is characterised in that：The hardware
The cell of alarm refers to the alarm cell list in the alarm data that northbound interface is obtained.
7. the LTE adjacent areas parameter automatic optimization method of load is based on as claimed in claim 4, it is characterised in that：Described row
Except the method that distance is more than 800 meters of adjacent area is：According to cell longitude, latitude, by trigonometric function calculate high load capacity cell and
Traffic balancing Target cell distance, excludes adjacent area of the distance more than 800 meters.
8. the LTE adjacent areas parameter automatic optimization method of load is based on as claimed in claim 1 or 2, it is characterised in that：Step
(4) resource utilization=MAX (up PRB utilization rates, descending PRB utilization rates) described in.
9. the LTE adjacent areas parameter automatic optimization method of load is based on as claimed in claim 8, it is characterised in that：By step (4)
The resource utilization of cell is ranked up in ascending or descending in the list of middle acquisition, so that it is determined that resource utilization is most
Low cell.
10. the LTE adjacent areas parameter automatic optimization method of load is based on as claimed in claim 1 or 2, it is characterised in that：Step
(5) adjustment simultaneously is carried out in output parameter, is specifically included：
1) reselection hysteresis of high load capacity cell, adjusting step 2 are reduced, reselection hysteresis adjustment interval is【1,24】, it is to avoid extreme ginseng
Number is set；
2) the switching biasing of high load capacity cell and target equilibrium cell is reduced, adjusting step 2, adjustment is interval【0,24】.
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