Training Course_SRAN8.0_UMTS ANR-20130603-A-1.0.ppt

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Introduction to UMTS ANR in SRAN8.0

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.


Introduction

Benefits and Network Impact

Deployment

Performance Monitoring

Application Cases

Precautions

References/Acronyms and Abbreviations

Contents


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


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.


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


priorities.

SEFD-031400 UMTS to GSM Automatic Neighbor Relationship – UMTS

This feature automatically detects GSM neighboring cells for UMTS cells, adds missing


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


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


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.


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.


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



Neighboring cell

configurations are

simplified because

automatic methods

are used.


Introduction


Deployment


Application Cases

Precautions


Contents


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



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.


Introduction


Deployment


Application Cases

Precautions


Contents


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.


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


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.


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.


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.


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.


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.


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.


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.


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.


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.


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


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


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.


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.


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


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.


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.


Introduction


Deployment


Application Cases

Precautions


Contents


New Counters

None


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.


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.


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


OptiStatisticPeriodOptimization statistics period

1–31 x 24 7 x 24



Introduction


Deployment


Application Cases

Precautions


Contents


Application Cases

Application cases will be provided after first office application

(FOA) is complete.


Introduction


Deployment


Application Cases

Precautions


Contents


Precautions

None


Introduction


Deployment


Application Cases

Precautions


Contents


References

eCoordinator V100R002C00 UMTS ANR Feature Parameter

Description


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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Training Course_SRAN8.0_UMTS ANR-20130603-A-1.0.ppt

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