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RANOP – Radio Network Optimization PrinciplesIntroduction to Optimization

Soc Classification level Presentation / Author / Date 2 © Nokia Siemens Networks

RANOP – Time Schedule

DAY1 DAY2 DAY3

9.00 - 10.30

10.45 - 12.00

12.00 - 13.00

13.00 - 14.30

14.45 - 16.30

Introduction

Configuration/ParameterAssessments

LUNCH LUNCH LUNCH

PerformanceAssessment +Tools/Alarms

KPI and Measurements /Theory

KPI and Measurements/Tables & KPIs

Traffic and Capacity Optimization

Performance Optimization

Coverage & Frequency Optimization

Neighbor & HO Optimization

(E)GPRS Optimization

Alarms + documentation +Monitoring + verification + tools

Features to be considered

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Objectives

At the end of the course participants will be able to

• understand process of optimization• understand the quality definition• perform network assessment • use BSS counters and KPIs in daily work• perform basic optimization tasks• know which features can be used in optimization process• identify tools needed in optimization project

BSSPAR is a training related to parameters3G RANOP is a optimization training course related to 3G

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Contents of RANOP

• Introduction to Optimization – What is network optimization?– What should be taken into account when starting Network

Optimization?

• Assessment – Situation at the moment

• KPIs and Measurements– Measurement tables + KPIs

• Solution findings (optimization) and verification – Traffic and– Maximum gain in limited time and investments

• Recommended features

Soc Classification level Presentation / Author / Date 5 © Nokia Siemens Networks

Introduction to Optimization – table of contents

• Optimization – Process flow• Optimization – As a Technical Project• What is Network Optimization?• How Network Optimization can be done?• What is Network Quality?• How Network Quality can be measured?• Investments vs. Benefit• Optimization Project - Risks• Target definitions• Examples from real network

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Optimization – Process Flow

Project Starts

INPUTS

Assessments &Analysis

Solutions

PriorizationWork ordersSolution

Verification Implementations

Are Criteria’sFulfilled

Project Ends

Monitoring /Data collection

Analysis Solutions

More detailed inputs (if necessary) based on assessment

Yes

No

Projectreport

PerformanceProblems

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Optimization – Process box explanation

• Performance problem– Customer complaints, performance monitoring, be number 1 operator etc…– Different kind of definitions and targets

• Input– Performance data etc

• Assessment and analysis– Network status based on inputs– Network analysis for preliminary solutions

• More detailed input– If target etc must be specified based on assessment / analysis phase

• Solutions– Preliminary solutions based on assessment / analysis

• Priorization– Task order based on inputs/limitations (, €, etc )

ProjectStarts

INPUTS

Assessments &Analysis

Solutions

PriorizationWork ordersSolution

Verification Implementations

Are Criteria’sFulfilled

ProjectEnds

Monitoring /Data collection

Analysis Solutions

More detailed inputs (if necessary) based on assessment

Projectreport

PerformanceProblems

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Optimization – Process box explanation

•Work Order– Official work order (WO) for optimization tasks

•Implementation– Implementation of the optimization task (based on WO)

•Solution verification– Verification, that ordered tasks have been done properly

•Criteria Check– Is network performance fulfilling accepted criteria

•Monitoring / data collection– Performance data collection– Deeper performance monitoring

•Analysis– Deeper performance data analysis

•Solutions– Primary solutions based on analysis

•Project report– Final project report

ProjectStarts

INPUTS

Assessments &Analysis

Solutions

PriorizationWork ordersSolution

Verification Implementations

Are Criteria’sFulfilled

ProjectEnds

Monitoring /Data collection

Analysis Solutions

More detailed inputs (if necessary) based on assessment

Projectreport

PerformanceProblems

Soc Classification level Presentation / Author / Date 9 © Nokia Siemens Networks

Target Definitions

Target

€ Money

Customer complaints

Performance Data (KPI) +priorization

Resource

Assessment

Time

Other Inputs

Target is always a compromise between inputs

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Target Definitions - Solutions

After assessment – what can be done with– Certain money with certain time with certain resources

• Bad frequency plan but projects lasts only 2 weeks No time to do totally new frequency plan

• Biggest bottleneck is lack of transmission capacity Should be optimize air interface if more gain will be get from transmission

network

• UL / DL coverage limitations If UL limited, there is no need to built new sites. UL should be improved

instead of DL

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Optimization – As a Technical Project

PROJECT

STARTS

€

…

INPUT Data

• OSS• Benchmarking• Regulator• Drive Test• Customer

complaints…

INPUTS &DEFINITIONS Optimization

tasks&

Monitoring&

Criteria Checks

Reports

ASSESSMENTS

PROJECT

ENDS

Final Project Report

Situation at the

moment

time

money

resources

T I M E L I N E

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Maximize network quality :• as perceived by the subscriber• as perceived by the operator within the given scope

Balance investment versus achieved quality

What is Network Optimization?

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How Network Optimization can be done?

Note! Case 1 and 2, Same quality improvements over the period

Optimization projects=> quality is improved after projects

Quality trend

Quality trend

quality

time

Case1: Optimization projects to improve quality

Case2: Monitoring =>all time optimization (part of network planning)

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What is Network Quality?

• Network quality can be measure• Interference level• Coverage• Drops• Drops / Erlang• MOS• Customer complaints

There are many different ways to measure the quality of the network

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OPERATOR

CUSTOMER

NETWORK

SERVICES

MOBILE

COST

• Mail Box, Data, Fax• HSCSD, GPRS, WAP• Customer Care• Faulty H/W or S/W• Mobile Quality• Misuse of Equipment

• HW/SW Failures• Network Configuration• Network Traffic• Spectrum Efficiency • Coverage yes/no• Service Probability• Quality• Call Set Up Time• Call Setup Success Rate• Call Completion Rate

• H/W Costs• Subscription/Airtime costs• Additional Services Costs

• Network Equipment Costs• Maintenance Costs• Site Leasing Costs• Transmission Link Costs

What is Network Quality?

OPERATOR

CUSTOMER

NETWORK

SERVICES

MOBILE

COST

• Mail Box, Data, Fax• HSCSD, GPRS, WAP• Customer Care• Faulty H/W or S/W• Mobile Quality• Misuse of Equipment

• HW/SW Failures• Network Configuration• Network Traffic• Spectrum Efficiency • Coverage yes/no• Service Probability• Quality• Call Set Up Time• Call Setup Success Rate• Call Completion Rate

• H/W Costs• Subscription/Airtime costs• Additional Services Costs

• Network Equipment Costs• Maintenance Costs• Site Leasing Costs• Transmission Link Costs

Main focus on Network

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How Network Quality can be measured?

Customer complaints• Can detect problems in

certain regions that are masked by statistics.

• A bit too late!! • These are consequences, not

reasons

Field Tests•Geographically locate problems

•Typically downlink• Snapshot• Expensive and time consuming!

From Network Data•Allows centralized data collection

•A cost efficient way to monitor network quality

•Problems can be found very quickly, before customer complaints

Three main forms to monitor and detect the needs of optimization:

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Investments vs. Benefit

• Weight of quality targets changes in time• In green field the coverage is most important• Later capacity / quality / coverage are all most important

Same with optimization, how to optimize to get the biggest benefit

• Which are the biggest bottlenecks in project• Coverage, capacity or quality

QualityCoverage

Capacity

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Optimization Project - Risks

• Scope is not defined well– For example air interface optimization => biggest bottlenecks are in

Core or in transmission

• Unrealistic target definitions– KPI risks

Triggering points (multi vendor KPIs)

– Resources. For example no transmission engineers available– Time and money. 2 weeks time to re-plan transmission network

• Processes are not supporting time schedule– For example due to the internal processes it will take 4 weeks to

implement parameter change

• Used tools– Excel macros are replacing post processing / planning / monitoring

tools

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Target Definitions…

Target Area: – Geographical area included in the project, number of BSCs and sites

Timeframe:– Timeframe for the completion of the project

Methodology:– Arranging the reporting– The process to implement the change requests (CR)– Drive test, used or not – Implementation – who will implement changes?

Tools:– Choice and preparation of all the necessary tools to develop the

optimisation process

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Target definitions

Share Of Responsibilities;– Agreeing who (NSN or the Operator) is responsible for every task

Project Organization:– Organisation of the whole project team, resource dimensioning

Features and Strategies:– Features that are currently in use, and what others can be implemented

if needed in order to improve the target indicators (E.g. Half Rate, Dynamic SDCCH etc.)

– Operator HO/Adjacency, Traffic, GPRS strategy in order to check if the parameters are correctly set for that purpose

Software or hardware upgrades:– How to deal with SW/HW upgrades

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Examples from real network Automated network performance optimization

Customer challenge • To ensure good performing GSM network to minimize churn

Our solution • Automated measurement based optimization process : Analyze the current performance in network

(mobility and interference) Identify actions necessary to improve performance Optimize accurately by using knowledge on current network configuration and network

performance and traffic measurements

Customer benefits• Accurate and repeatable optimization (automation)• Optimized usage of network resources • Minimized usage of available frequency spectrum

Live Network

Example