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Diplomado en Telecomunicaciones y Tecnologas de la

Informacin con mencin en Comunicaciones Inalmbricas

Self-Optimizing Networks

Benefits of SON in HSPA and LTE

Networks

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What is SON ?Self-organisation is a process where the organisation (constraint,

redundancy) of a system spontaneously increases, that is, without thisincrease being controlled by the environment or an encompassing or

otherwise external system(Heylighen, 2009).

With LTE we have a great opportunity to bring the value of SON into our

networks. But the potential and ambition clearly includes legacy networks

such as UMTS and GSM also.

Within the vision of SON the operators

have defined the most relevant use cases

for the automation of operational tasks:typically, those tasks that require significant

manual effort, or tasks that are highly

complex in nature, and are therefore prone

to error. NGMN presented these use cases

to the vendor industry, and 3GPP

standardisation bodies were requested todevelop and stan dardise respective self-

organising solutions (3GPP TR32.500,

2011).

NGMN: Next Generation Mobile Networks

3GPP : 3rd Generation Partnership Project

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Why SON ?Why has the vision of self-organising networks gained importance in

our industry?

There are two obvious drivers:

cost reduction and increasingcomplexity.

Network operators urgently need much more automation in order to

efficiently manage large networks consisting of tens of thousands of

base stations with hundreds of settings each. Optimising several

network layers providing a multitude of customer services with high service

quality would be highly complex and labour intensive, and therefore would

be very costly without the mechanisms and intelligence in our networks to

organisethemselves.

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SON : The new way of

optimizationData Collection Analysis Implementation Feedback

Reactive, rare,

manual and very

partial

Proactive, frequent,

automatic andcomprehensive

Manual and labor

intensive, relying on

high expertise

Automatic, in

real time

Manual

Automatic

optimization, in nearreal time

Manual validation

or customer

complaints

Instant, focused

and continuous

ExistingApproaches

Cycle takes days to weeks only one size fits all optimization possible

Cycle takes minutes dynamic optimization, based on changing conditions

SON

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Radio Planning and Optimization life cycle

Performance KPI monitoring and

improvement

Data Post processing

Troubleshooting

Tuning of RAN software and

hardware parameters

Optimizing RAN resources

efficiency

Network Benchmarking

RAN dimensioning

RF propagation modeling

Planning cell sites locations

Planning sites configurations

Supporting sites rollout process

Predictions of expected QoS for

services, devices, locations

Evaluation of changes, new products,

devices, services etc.

New sites integration, commissioning

and initial tuning

Site swapping

Site reparenting

Cluster performance verification and

acceptance

Network expansions integration

SON affects the entire life cycle RNPO

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SON affects the entire life cycle RNPOIn the life cycle of a mobile communication network there are many important

reasons to carry out performance measurement for different applications. The main

goal of the network operator is to achieve profit. Therefore, it is very essential to

have many subscribers, good network quality, and low costs. The usage of

performance measurement supports many tasks and processes under these

aspects. With the help of performance monitoring, it is possible to collect

information on: networks traffic intensity.

traffic distribution (if it is spread out evenly, or concentrated in certain spots).

events happening in certain spots of the network (and how often do they

occur).

planning efficiency (that is, if the instructions are fulfilled, or are there any

additional changes needed).

locations where frequent failures are reported.

subscriber behavior (if it corresponds with the assumed model).

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SON affects the entire life cycle RNPOThe operator is able to supervise the performance capacity and quality of hisnetwork and increase the subscriber's satisfaction.

Performance monitoring is mainly used for:

Supervision of quality, capacity and performance

Verification of network planning and optimization

Forecasts for future network planning

Error detection and correction

Troubleshooting

Implementing services and features

Customer behavior identification

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SON and KPIKPIs are basic network quality indicators for offer processing and field acceptancetests.

In order to prove that the performance of an operating network matches the

targeted quality, field acceptance tests are carried out. As multiple factors may

influence the performance of an operational network, detailed conditions, under

which network KPIs are valid, must be specified and agreed upon. These includesystem performance, network planning and dimensioning, measurement

campaign planning and parameterization.

LTE system architecture was designed to meet the following major goals.

[3GPP25.913]:

Improved system capacity & coverage

High user data rates (peak upload and download rates)

Reduced latency (one-way delay and RTT)

Simplified architecture, IP based transport infrastructure

Superior user experience

Seamless connection to legacy networks (GSM, UMTS, 3GPP2/CDMA)

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SON and KPIKPIs are basic network quality indicators for offer processing and field acceptancetests.

In order to prove that the performance of an operating network matches the

targeted quality, field acceptance tests are carried out. As multiple factors may

influence the performance of an operational network, detailed conditions, under

which network KPIs are valid, must be specified and agreed upon. These includesystem performance, network planning and dimensioning, measurement

campaign planning and parameterization.

LTE system architecture was designed to meet the following major goals.

[3GPP25.913]:

Improved system capacity & coverage

High user data rates (peak upload and download rates)

Reduced latency (one-way delay and RTT)

Simplified architecture, IP based transport infrastructure

Superior user experience

Seamless connection to legacy networks (GSM, UMTS, 3GPP2/CDMA)

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Relationship between SON functions and network parameters

Coverage Capacity Availability Reliability

PM

CM

Performance Management

Configuration Management

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MRO

Multi RAN Technologies

Synchronization and Coordination

OSS - Multi RAN Vendors

GSM UMTS / HSPA Femto Small-Cells LTE / A-LTE

Ericsson Huawei NSN Cisco ALU ZTE

ANR LB P&P CCORACH-

O

Multiple Technologies & Vendors OfferingANR : Automatic Neighbor RelationLB : Load Balancing

P&P : Plug and Play

MRO: Mobility Robustness / Handover Optimization

CCO : Coverage and Capacity Optimization

RACH-O : Random Access Channel (RACH) Optimization

The SON idea

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c-SON : a common e2e platform

Centralized SON

architecture

Common platform

providing end to

end RAN

management

solution

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SON ARCHITECTURE ALTERNATIVES

Different SON architecture approaches: Centralized (left), Distributed (center) and

Hybrid (right).

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SON : Automatic Neighbor Relation (ANR)All in real Time

!

Impro ves KPI.

Brings operat ional ef fic iency.

Adapts to networ k changes.

Henry Vasquez

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SON : Automatic Neighbor Relation (ANR)All in real Time

!

Impro ves KPI.

Brings operat ional ef fic iency.

Adapts to networ k changes.

Henry Vasquez

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SON : Plug & PlayWhen adding new cells to the Network, Plug & Play creates a complete neighbor

list for the new sites based on the configured physical distance around thecurrent cell and the azimuth of the neighboring cells. This initial neighbor list

gives the cell an initial group of adjacent cells for HO from day one. Further

optimization of the neighbor list will be done by the Intra-frequency and Inter-

frequency neighbor relations modules of the ANR when the site goes live.

Plug & Play in Action

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Benefits of SON - CONCLUSIONS Overall, there is no silver bullet, but rather, an optimalarchitecture that can simultaneously provide the best possibleperformance and simplicity. It is expected that over the next fewyears, SON will possibly evolve towards hybridization to manage

the tremendous complexity. Some SON use cases deemed toocomplicated will necessitate a supervisory entity at the OSS,which itself can be multi-vendor, while other SON use cases,fueled by the industrys IOT efforts, will be implemented withoutan OSS involvement. The SON space continues to be dynamic

and deviations from such an architectural pattern may beinfluenced by dynamically changing market developments.

Improve KPIs.

Save CAPEX and OPEX.

Dynamic adaptation to demand.

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Benefits of SON - CONCLUSIONSOperator requirements SON features

Automation of NW optimization

Closed loop / Feedback system

Real Time Visibility

Short action cycles

Vendor agnostic

Technology agnostic

Scalability

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Av. San Luis 1771, San Borja, Lima - Per

Web: http://www.inictel-uni.edu.pe

MUCHAS

GRACIAS

por su atencin!

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