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RF OPTIMIZATION OF WCDMA NETWORK

ethio telecom May 17,2012

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OUTLINE Overview of UMTS Network deploymentOptimization team organization and processMajor Optimization Activities Challenges

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OVERVIEW OF UMTS NETWORK DEPLOYMENT

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The Network Topology

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Full continuous coverage for the Capital Addis Ababa ( urban and dense urban coverage) With capacity of 300,000 subscribers Supports HSDPA, HSUPA and

HSDPA+ high speed data services

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Network boundaries by vendor

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NOKIA ZTE UMTS Before

There are 58 UMTS sites collocated with NOKIA GSM sites

There are 135 UMTS sites collocated with ZTE GSM sites

There were 50 UMTS sites for hot spots

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Dual frequency Distribution

There are 245 Node B’s to cover Addis Ababa There are 27 S222 Node B’s to cover dense urban area

There are 218 S111 Node B’s to cover Addis Ababa

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OPTIMIZATION TEAM ORGANIZATION AND PROCESS

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RAN Manager

WCDMA OPTIMZATION TEAM

Planning TEAM

Optimization SUPERVISOR Planning SUPERVISOR

STAFF-1 STAFF-2 STAFF-1

Team Organization

Detection TEAM

STAFF-1 Detection Supervisor

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Optimization Process Engineeringoptimization

Maintenance Optimization

SSV Test Routine Optimization

Phase-1 Cluster Optimization

KPI monitoring

Phase-2 Cluster Optimization

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MAJOR OPTIMIZATION ACTIVITIES

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Initial Optimization Phase-2 Cluster Test

Phase-1 Cluster Test

SSV TEST

routine Optimization Follow KPI

Compile the Engineering and Radio Parameters of the Network

OCT 2011 NOV 2011 DEC 2011 JAN 2012 FEB 2012

Major Activities

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CHALLENGES

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Engineering optimization

Challenges

• Site Audit not finished cause problem on physical tunings

• R99 Service checking was made based on manual computation

• Some site with lower HSUPA rate which was justified by poor radio condition

• Temporary interference

• RTWP value Modification

• Layer Strategies

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Challenges Routine optimization

• IRAT Handover issues • KPI definition issues • R99/Support on F2 Frequency disturb the layer strategy

• Layer strategies not fully implemented as the proposal • KPI basics dashboard

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