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Shared success
RF OPTIMIZATION OF WCDMA NETWORK
ethio telecom May 17,2012
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Shared success
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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