training course_sran8.0_umts anr-20130603-a-1.0.ppt
TRANSCRIPT
Copyright © 2013 Huawei Technologies Co., Ltd. All rights reserved. Page 3
Objectives
After completing this course, you will be able to: Understand the value and application scenarios of UMTS ANR.
Know the specifications of UMTS ANR.
Explain basic principles of UMTS ANR.
Install, configure, commission, and verify UMTS ANR based on
related manuals.
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Introduction
Benefits and Network Impact
Deployment
Performance Monitoring
Application Cases
Precautions
References/Acronyms and Abbreviations
Contents
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Introduction
After optimizationBefore optimization
UMTS cell B LTE cell C
GSM cell A
Automatic neighbor relation (ANR), an important SingleSON feature, is deployed on the eCoordinator.
Neighbor relations are classified into normal and abnormal neighbor relations. Missing and redundant neighboring cells are typical examples of abnormal neighbor relations. ANR can automatically detect and maintain abnormal neighbor relations.
ANR can automatically detect neighboring cells including the missing and redundant neighboring cells, add or delete related neighbor relations, and adjust neighboring cell priorities.
Huawei ANR provides three neighbor relation optimization modes: automatic optimization, scheduled optimization, and manual optimization. In automatic optimization mode, the eCoordinator automatically performs abnormal neighbor relation optimization upon detecting abnormal neighboring relations. In scheduled optimization mode, the eCoordinator automatically performs abnormal neighbor relation optimization at a specified time. In manual optimization mode, the eCoordinator performs neighbor relation optimization after customers determine whether to delete or add neighboring cells based on optimization suggestions provided by the eCoordinator.
SRAN8.0 provides UMTS intra/inter-frequency ANR, UMTS-to-GSM ANR, and UMTS-to-LTE ANR.
The neighbor relation of the SingleRAN network is complex and network optimization is more complex.
Workloads of neighbor relation configurations are reduced.
UMTS cell D
UMTS cell E
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BackgroundWhy ANR is introduced ?
Wireless network architectures become more complicated and network operation and maintenance (O&M) requires higher costs and more efforts. To address this situation, Self-Organization Network (SON) is brought forward in the telecommunications industry to simplify manual network optimization, reduce workloads, and save operating expenses (OPEXs).
ANR, one of the self-optimization functions of SON, is used to simplify neighbor relation optimization and reduce workloads.
Neighbor relation optimization needs to performed frequently.
The number of neighbor relations and handover types increase sharply, which makes management and maintenance of neighbor relations more difficult.
In this case, operators have to spend much money in optimizing neighbor relations. In addition, neighbor relation optimization becomes more difficult and requires more workloads on the SRAN network.
ANR is to simplify optimization of complex neighbor relations on the SingleRAN network and reduce labor costs.
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SRAN 8.0 UMTS ANR provides the following functions:
SEFD-030200 Automatic Intra-Frequency Neighbor Relation – UMTS
This feature automatically detects UMTS intra-frequency neighbor relationships, adds missing
neighboring cells, deletes redundant neighboring cells, and adjusts neighboring cell
priorities.
SEFD-030300 Automatic Inter-Frequency Neighbor Relation – UMTS
This feature automatically detects UMTS inter-frequency neighbor relationships, adds missing
neighboring cells, deletes redundant neighboring cells, and adjusts neighboring cell
priorities.
SEFD-031400 UMTS to GSM Automatic Neighbor Relationship – UMTS
This feature automatically detects GSM neighboring cells for UMTS cells, adds missing
neighboring cells, deletes redundant neighboring cells, and adjusts neighboring cell
priorities.
SEFD-031200 UMTS to LTE Automatic Neighbor Relationship – UMTS
This feature automatically detects neighboring cells, adds missing neighboring cells, and
deletes redundant neighboring LTE cells for UMTS cells.
Function Introduction
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Technical Principles
UMTS intra/inter-frequency ANR and UMTS-to-GSM ANRThe eCoordinator obtains measurement results of surrounding cell signal qualities from the MRs reported by UEs. Meanwhile, the RNC collects handover-related traffic counters.The eCoordinator analyzes MRs and sorts measured cells based on engineering parameters and RNC configuration data on networks.The eCoordinator determines whether to use the sequence as neighbor relation optimization suggestions.The eCoordinator exports optimization suggestions to the ANR task UI on the M2000 and modifies neighbor relations based on optimization methods.
Measurement control and report
eCoordinator
RNC
2. Neighbor relation analysis
4. Neighor Relaton Configuration
Measurement report
M2000
Operator
User interface
1. Data collection (MRs and KPIs)
3. Optimization suggestions
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Technical PrinciplesObtain measurement results and
indentification information of UMTS cells surrounging LTE cells.
Detect potential missing neighboring cells.
Sort potential missing neighboring cells.
Generate missing neighboring cell optimization suggestions.
Deliver optimization suggestions based on optimization suggestion
execution mode.
End
Does the number of optimization
suggestion executions reach the upper limit?
No
Yes
Enable UMTS-to-LTE ANR.
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Technical Principles
Basic Principles for Optimizing Neighboring Cell Priorities
After the neighboring cell priority function is enabled, the eCoordinator sorts neighboring cells
of the same type based on the number of handovers. The first 80% of neighboring cells are
allowed to perform neighboring cell priority adjustment and the rest 20% of neighboring cells
keep the neighboring cell priority unchanged.
For the first 80% of neighboring cells:
If the handover success rate is greater than the upper threshold for the neighboring cell
priority, the priorities of these neighboring cells increase (the highest priority is 0).
If the handover success rate is between the upper and lower thresholds for the neighboring
cell priority, the priorities of these neighboring cells keep unchanged.
If the handover success rate is less than the lower threshold for the neighboring cell priority,
the priorities of these neighboring cells decrease. The priorities of UTRAN intra-frequency
neighboring cells decrease to 30 at most and the priorities of UMTS inter-frequency
neighboring cells and GSM inter-RAT neighboring cells decrease to 63 at most.
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Neighbor relations change due to network deployment, migration, or capacity expansion.
Periodical maintenance and neighbor relation optimization are required due to changes in network scales and user distribution.
Micro base stations are deployed to cover hotspot areas surrounding macro base stations. In this case, neighbor relations need to be optimized again because new base stations are deployed and new cells are established.
Network deployment plans and coverage vary with network modes. Neighbor relations need to be established between different network modes for handovers and reselection.
Neighbor relations between modes need to be optimized during multi-mode network evolution.
Scenario
Cell 1 Cell 3Cell 2
Scenario
Network adjustment
Periodical maintenance
Area network optimization
Multi-mode network
optimization
Network evolution
GSM cell coverage UMTS cell coverage LTE cell coverage
GSM UMTS LTEEvolutio
nEvolutio
n
Urban cell coverage
Hotspot coverage
Hotspot coverage optimization
Network
Cell 3Cell 2
Network Cell 1
Added Migrated
Benefit
Missing or
redundant
neighboring cells
can be easily
detected, which
improves
optimization
efficiency and
reduces operator
OPEXs.
KPIs improve
after missing
neighboring cells
are added.
Mutual benefits are obtained between modes.
Application Scenarios
Handover/Reselection
Handover/Reselection
Handover/Reselection
Neighboring cell
configurations are
simplified because
automatic methods
are used.
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Introduction
Benefits and Network Impact
Deployment
Performance Monitoring
Application Cases
Precautions
References/Acronyms and Abbreviations
Contents
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Benefits and Network ImpactBenefitsNeighbor relations are automatically optimized by processing MRs. No manual intervention is required.
Neighbor relations are automatically configured and the workload for customers modifying neighbor relations is
reduced. Suggestions for optimization neighbor relations do not need to be manually imported.
MR information is directly collected and no drive test is required to obtain data, which reduces high drive test
costs.
In this way, UMTS intra/inter-frequency and inter-RAT neighbor relations are optimized, which paves way for
optimal network performance. Network performance improves by increasing handover success rates and
decreasing call drop rates.
Traditional optimization operations
Drive test
Manual operation
5 days
22 days
0 days
7 days
Collecting and handling MRs
Verifying configurations
Improving efficiency
Based on drive test data
Based on MRs
Low efficiency and difficult to understand
High efficiency and accuracySimplifying network
operations
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Benefits and Network Impact
Network Impact If the inter-frequency and UMTS-to-GSM neighboring cell detection switches are turned on,
handover success rates and call drop rates may probabilistically affected because the time
of measurement increased probabilistically. In the test on UMTS-to-GSM missing
neighboring cells in Romania, the UMTS-to-GSM handover success rate decreases by
0.42% but no call drop decrease. In other tests, no KPI fluctuates significantly.
If the MR collection recording function on the RNC is enabled, CPU usage of the SPU
increases. According to tests on live networks, absolute CPU usage of the SPU increases
by 0.62% on a lightly-loaded network and by 3% on a heavily-loaded network.
To optimize UMTS-to-LTE neighbor relations, When UEs perform periodical inter-RAT
measurement, the call gapping (GAP) mode is enabled, those UEs with high throughput (average PRB
resource utilization more than 75% per TTI) will be affected less then 25%, and there is no affect for low
throughput UEs. The throughput of a cell that with multiple UEs will not be affected because of dispatch.
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Introduction
Benefits and Network Impact
Deployment
Performance Monitoring
Application Cases
Precautions
References/Acronyms and Abbreviations
Contents
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Prerequisites
Dependent Features This feature depends on RNC functions of missing neighboring cell detection and MR
recording, which are enabled by running MML commands. The two functions are provided
by default and not under license control.
Mutually Exclusive Features None
Influential Features SEFD-032100 Scrambling Code Self-Optimization – UMTS has positive influences on this
feature. Eliminating scramble code conflicts on networks help this feature establish correct
neighbor relations.
The UMTS-to-LTE feature depends on LU NRT completeness and is recommended to be
used together with LTE LOFD-002002 Inter-RAT ANR to ensure LU NRT completeness. If
this feature is not enabled, you are advised to manually configure a complete LU NRT.
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Prerequisites
Dependency on Hardware This feature depends on SAU modules to use MR data stored on the SAU.
Dependency on Other NEs The versions of the eCoordinator, M2000, RNC, and eNodeB need to be in SRAN8.0 or later versions.
License Planning This feature is sold as an optional feature on the eCoordinator. The following table describes specific
license designs. (No license control item is added on the NE side of the controller.)
License Homing eCoordinator
Feature Type Optional
Sales Unit Cell
Service bundling sale No
Relationship with Current Features
New feature that can form a complete neighboring cell solution with LTE ANR or GSM ANR.
Dependency See "Prerequisites."
License Control Item
SEFD-030200 Automatic Intra-Frequency Neighbor Relation – UMTS
SEFD-030300 Automatic Inter-Frequency Neighbor Relation – UMTS
SEFD-031200 UMTS to LTE Automatic Neighbor Relationship – UMTS
SEFD-031400 UMTS to GSM Automatic Neighbor Relationship – UMTS
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Prerequisites
Other DependenciesThis feature depends on accurate engineering parameters.
Only cell scramble codes are reported in the MR. To match cell IDs, engineering
parameters are required. If engineering parameters are incorrect, cells matched may be
wrong.
For networking deployed by different vendors, inter-vendor engineering parameters need
to be imported completely.
UMTS-to-LTE ANR needs engineering parameters to select eNodeB lists to be
measured. However, UMTS-to-LTE ANR does not require engineering parameters to
match cell IDs.
The feature depends on RNC configuration data to obtain configuration
information of source and target cells.
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Entire Process
1. Create the eCoordinator NE on the Main Topology UI of the M2000.
2. On the eCoordinator Setting UI of the M2000, set NEs to be
managed and optimized by the eCoordinator and import engineering
parameters.
3. Communicate with customers as required to determine optimization
scopes and modes (whether manual operations are required).
4. Obtain frequency information and mobility policies of GUL networks
to determine measurement items of target frequencies and
parameter configurations of UMTS inter-frequency neighboring cells.
5. On the M2000 UMTS ANR UI, set UMTS intra/inter-frequency,
UMTS-to-GSM, UMTS-to-LTE ANR parameters including task
parameters, blacklists and whitelists, and target measurement
parameters.
6. On the M2000 UMTS ANR UI, create UMTS intra/inter-frequency,
UMTS-to-GSM, and UMTS-to-LTE ANR optimization tasks.
7. In manual mode, manual operation is required. The eCoordinator
delivers optimization suggestions of neighbor relations that have
been verified.
8. View SON logs and KPIs.
Start
Create the eCoordinator NE.
Set NEs to be managed by the eCoordinator.
Select the optimization range.
Import engineering parameters.
Survey GUL frequencies and mobility policies.
Verify whether manual intervention is involved.
Set ANR-related parameters.
The eCoordinator performs optimization
tasks.
Deliver optimization suggestions for manual
intervention.
View SON logs and KPIs.
End
Create ANR optimization tasks.
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Deployment Suggestions and Required Information (1)Deployment Suggestions
Networking Scenario Features in UMTS ANR can be enabled in one of the following scenarios: Huawei UMTS network,
Huawei GSM and UMTS networks, and Huawei UMTS and LTE networks. In multi-vendor networking scenarios, if RNC configurations and engineering parameters can be
obtained and are transferred to Huawei-defined formats, Huawei equipment can add peer-vendor cells
as neighboring cells by using ANR.
Deployment Time In case of network deployment, capacity expansion, and swapping, when network equipment has been
commissioned and powered on and users are available on networks, UMTS ANR can be enabled.
UMTS ANR can also be enabled in one of the following scenarios: network adjustment, local area
optimization, multi-mode network optimization, network mode evolution, and SRAN refarming.
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Deployment Suggestions and Required Information (2)Required Information Engineering parameters
Engineering parameters include cell altitudes and longitudes. Special cells in indoor
distributed or high-rail/speed scenarios, need to marked in engineering parameters,
these cells does not participate in the optimization.
If other vendors exist, related parameters of other vendors need to be contained in
engineering parameters.
If engineering parameters of original site change or new sites are added, the
corresponding engineering parameters need to be synchronized.
Configuration files When UMTS ANR is running, update related configuration files by hour.
Blacklists and whitelists In some special scenarios, whitelists are cells whose neighbor relations cannot be
deleted and blacklists are cells whose neighbor relations cannot be added.
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Network Planning
Networking Planning N/A
RF Planning N/A
Parameter Preparation See "Parameter Optimization" in this document and the eCoordinator V100R002C00
UMTS ANR Feature Parameter Description.
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Activation ProcessUMTS ANR can be deployed by controlling eCoordinator startup tasks on the M2000 or LMT. The M2000 is
recommended. The following takes the M2000 for example to describe how to deploy UMTS ANR.
Step 1: Set NEs to be managed by the eCoordinator.
1. On the home page of the M2000, choose Configuration > eCoordinator Settings. The eCoordinator Settings tab page
is displayed.
2. On the eCoordinator Settings tab page, click the NE Settings tab. Select an item under NE on the left navigation tree,
right-click, and choose Modify from the shortcut menu. The NE Settings dialog box is displayed.
3. Add NEs to be managed by the eCoordinator from Available NEs to Selected NEs and click OK.
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Activation ProcessStep 2: Set areas to be optimized.
1. On the eCoordinator Settings tab page, click the Zone Settings tab and click . The Add Zone dialog box
is displayed.
2. In the Add Zone dialog box, set Zone Name, add objects in the optimization area from Available Objects
to Selected Objects, and click OK.
3. Click to update the optimization area.
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Activation ProcessStep 3: Import engineering parameters.
1. On the eCoordinator Settings tab page, click the Engineering Parameter Management tab and click .The
Import Engineering Parameters dialog box is displayed.
2. In the Import Engineering Parameters dialog box, select related eCoordinator in the eCoordinator box and
select UMTS on the right of Engineering Parameters. If repeater cells are available, select UMTS RRU
Repeater. Set the path and import the UMTS engineer parameter profile.
3. Click OK.
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Activation ProcessStep 4: Set UMTS, UMTS-to-GSM, and UMTS-to-LTE ANR optimization parameters and tasks.
1. On the M2000, choose SON > UMTS ANR. The UMTS ANR tab page is displayed.
2. On the UMTS ANR tab page, click the Parameter Policy tab, select an eCoordinator NE, and click to create a group
of UMTS intra/inter-frequency, UMTS-to-GSM, or UMTS-to-LTE ANR optimization parameters. Then click Save.
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Activation ProcessStep 4: Set UMTS intra/inter-frequency, UMTS-to-GSM, and UMTS-to-LTE ANR optimization parameters and tasks.
3. On the UMTS ANR tab page, click the Optimization Management tab and click to create an optimization task.
4. On the Create Optimization Task dialog box, set optimization parameters such as eCoordinator Name, Optimize
Zone, Parameter Policy.
5. Click OK. If tasks are successfully created, the created tasks will be displayed in the optimization task list.
End
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Activation Observation
Perform activation observation from the following aspects:Task running status: After the feature is enabled, Service Type is set to a UMTS ANR optimization task and the
enabling switch is on the Optimization Management tab page.
Optimization suggestions: After optimization is complete, optimization suggestions are displayed on the right of
the Optimization Management tab page.
Optimization logs: Choose SON > SON Log. Optimization logs are opened and running status of optimization
tasks can be observed.
UMTS ANR optimization logs
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Activation Observation
Services can be verified from the following aspects: Absolute number of neighboring cells added and deleted: Neighboring cells automatically added
and deleted by using the feature are counted by analyzing configuration data, which proves that the
feature is working and perform actions.
Proportion of effective missing neighboring cells in a single cell: Determine added neighboring cells
that perform handovers, which are effective neighboring cells. The ratio of effective neighboring cells
to all added missing neighboring cells reflect accuracy of adding missing neighboring cells.
Proportion of network-level effective neighboring cells added: Analyze accuracy of adding missing
neighboring cells in an area by using the method of analyzing accuracy of adding missing
neighboring cells in a cell.
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Optimization Suggestion Delivery Optimization suggestions can be delivered manually, automatically, or at a specified time.
Manual delivery
After users verify optimization suggestions on the M2000, the eCoordinator can change neighbor relations of cells
verified by users.
1. Select optimization suggestions to be delivered, as shown in in the following figure.①
2. Click to deliver optimization suggestions, as shown in in the following figure.②
3. View delivered optimization suggestions.
1
2
View the progress of delivering optimization suggestions.
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Optimization Suggestion Delivery
Automatic delivery and scheduled deliveryIn automatic delivery mode, tasks automatically perform neighboring cell optimization at the end of each
optimization cycle and deliver optimized neighbor relation execution. In scheduled delivery mode, similar to
automatic delivery mode, users can specify the time when to execute neighbor relation optimization
suggestions.
In the two delivery modes, users can choose a period of time to view delivered optimization suggestions.
2
View delived optimization suggestions.
1
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DeactivationDeactivation scenariosThis feature can be disabled in one of the following features: KPIs such as handover success rates and call
drop rates meet related requirements and network topologies are stable; no base station or cell is added or
deleted; no RF optimization is required.
Deactivation StepsTo deactivate this feature, perform the following steps: choose the feature to be deactivated and click to stop
the running feature.
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TroubleshootingANR tasks fail to be started Step 1: Check whether "ALM-51301 Number of Resources Used Exceeding Alarm
Threshold Specified by License” is reported. If the alarm is reported, refer to the help of
"ALM-51301 Number of Resources Used Exceeding Alarm Threshold Specified by
License” . If the alarm is not reported, refer to step 2.
Step 2: Check whether “ALM-51304 Task Abort” is reported. If the alarm is reported, refer
to the help of "ALM-51304 Task Abort”. If the alarm is not reported, please connect
Huawei engineer.
ANR optimization suggestions fail to be deliveredIf ANR optimization suggestions fail to be delivered, please check whether the link between
the ECO6910 and the RNC is normal according to “ALM-51153 eCoordinator and NE
Disconnect Alarm”.
If the alarm is reported, refer to the help of “ALM-51153 eCoordinator and NE Disconnect
Alarm”.
If the alarm is not reported, please connect Huawei engineer.
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Introduction
Benefits and Network Impact
Deployment
Performance Monitoring
Application Cases
Precautions
References/Acronyms and Abbreviations
Contents
Copyright © 2013 Huawei Technologies Co., Ltd. All rights reserved. Page 36
Performance Evaluation
Assume that network conditions are the same before and after optimization. Enabling UMTS
ANR has positive influence on UMTS intra/inter-frequency, UMTS-to-GSM, and UMTS-to-LTE
handover success rates and call drop rates. Therefore, UMTS ANR performance can be
monitored by monitoring the corresponding handover success rates and call drop rates.
Users can select methods of monitoring the corresponding handover success rates and call
drop rates as required.
Users can know which neighbor relations are modified by ANR by viewing optimization logs
and analyze modification accuracy by using engineering parameters and maps.
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Parameter OptimizationUMTS intra/inter-frequency ANR and UMTS-to-GSM ANR
Parameter ID Parameter NameParameter Ran
geRecommended Val
ueOptimization Suggestion
MaxAddingNcellCountMaximum number of neighboring cells
Intra-frequency: 0–63
Inter-frequency: 0–64
UMTS-to-GSM: 0–64
Intra-frequency: 63Inter-frequency: 32UMTS-to-GSM: 32
This parameter sets the maximum number of neighboring cells for optimization cells. A small parameter value indicates that the number of neighboring cells added by ANR is small.
DistanceThresholdMissing neighboring cell distance threshold
0–50,000 5000
This parameter value can be adjusted as required. In dense urban areas, reduce the value; in suburban areas, raise the value; in urban areas, use the default value.
MissingNcellPeriodMissing neighboring cell detection period
1–31 x 24 24
This parameter value can be adjusted based on the number of UEs on live networks. If the number of UEs is large on live networks and missing neighboring cell optimization needs to be performed quickly, reduce the value.
NcellNo1AbsThresholdMissing neighboring cell No. 1 threshold
0–50,000,000 10
In the optimization cycle, if the number of MRs with the largest received signal strength in the source cell for a target cell is less than this threshold, the target cell is not automatically added as the neighboring cell of the source cell.
RedundantNcellExecPeriodRedundancy detection period
1–31 x 24 7 x 24
This parameter value can be adjusted based on the total number of handover requests per day on live networks. If the number of UE handovers on live networks is large, reduce this value to improve the redundancy deletion efficiency.
HOReqThresholdThreshold for the number of HO requests
0–10,000 0If this value is small, redundancy deletion conditions are strict and the possibility of deleting redundant neighboring cells is small.
HOSuccRateThresholdHO success rate threshold
0–100 0If this value is small, redundancy deletion conditions are strict and the possibility of deleting redundant neighboring cells is small.
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Parameter Optimization
UMTS-to-LTE ANRParameter ID Parameter Name
Parameter Range
Recommended Value
Optimization Suggestion
DistanceThreshold Measurement radius 0–50,000 5000
This value can be set based on application scenarios within the optimization scope. In dense urban areas, reduce the value; in suburban areas, raise the value; in urban areas, use the default value.
HOReqThresholdThreshold for the number of HO requests
0–10,000 0
This parameter sets the threshold for inter-RAT handover requests from LTE cells to optimization cells. If the number of neighboring cells configured is small, reduce the threshold to add more neighboring cells.
HOSuccRateThresholdHO success rate threshold
0–100 0If the number of neighboring cells configured is small, reduce the threshold to add more neighboring cells.
MRCountThresholdNeighboring cell measurement report count threshold
0–50,000 200If the number of neighboring cells configured is small, reduce the threshold to add more neighboring cells.
MaxAddingNcellCountMaximum number of neighboring cells
0–96 96
This parameter sets the maximum number of neighboring cells for optimization cells. A small parameter value indicates that the number of neighboring cells added by ANR is small.
OptiExecutePeriodOptimization execution period
1–14 x 24 24
This parameter value can be adjusted based on the number of UEs on live networks. If the number of UEs is large on live networks and missing neighboring cell optimization needs to be performed quickly, reduce the value.
OptiStatisticPeriodOptimization statistics period
1–31 x 24 7 x 24
This parameter value can be adjusted based on the number of UEs on live networks. If the number of UEs is large on live networks and missing neighboring cell optimization needs to be performed quickly, reduce the value.
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Introduction
Benefits and Network Impact
Deployment
Performance Monitoring
Application Cases
Precautions
References/Acronyms and Abbreviations
Contents
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Application Cases
Application cases will be provided after first office application
(FOA) is complete.
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Introduction
Benefits and Network Impact
Deployment
Performance Monitoring
Application Cases
Precautions
References/Acronyms and Abbreviations
Contents
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Introduction
Benefits and Network Impact
Deployment
Performance Monitoring
Application Cases
Precautions
References/Acronyms and Abbreviations
Contents
Copyright © 2013 Huawei Technologies Co., Ltd. All rights reserved. Page 44
References
eCoordinator V100R002C00 UMTS ANR Feature Parameter
Description
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Acronyms and Abbreviations
Abbreviation or Acronym Full Expansion
ANR automatic neighbor relation
GSM Global System for Mobile Communications
UMTS Universal Mobile Telecommunications System
LTE Long Term Evolution
CHR call history record
RAT radio access technology
MR measurement report
SON self-organizing network
Copyright © 2013 Huawei Technologies Co., Ltd. All Rights Reserved.The information in this document may contain predictive statements including, without limitation, statements regarding the future financial and operating results, future product portfolio, new technology, etc. There are a number of factors that could cause actual results and developments to differ materially from those expressed or implied in the predictive statements. Therefore, such information is provided for reference purpose only and constitutes neither an offer nor an acceptance. Huawei may change the information at any time without notice.
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