Course Overview
Planning WCDMA based networks require enhanced skill sets and techniques compared to those required for GSM networks. Planners need to have a thorough knowledge of the WCDMA air interface, cell loading, interference scenarios, cell breathing, effect of soft handoff, link budgeting on uplink and downlink, prediction models for macro, micro and pico cells. The UMTS RF design course offers participants a rigorous technical know-how of the above aspects as well as BSS planning, scrambling code planning, channel element dimensioning, co-siting considerations, as well as a green field network dimensioning, which includes both coverage, capacity planning and channel element dimensioning.
This course offers participants a demonstration of WCDMA planning aspects with the help of a UMTS planning tool.
Target Audience
Technical personnel responsible for UMTS network implementation, frequency design, cell planning, and troubleshooting
Course Prerequisites
Knowledge of UMTS and RF design experience assumed for any 2G technology.
Expected Accomplishments
Consider all the UMTS parameters in the UMTS uplink and downlink link budgets
Differentiate between GSM and UMTS link budgets
Explain the UMTS downlink link budget dilemma
Explain how range of cell is impacted by cell loading
Appreciate the need for simulations to predict UMTS network coverage and capacity
Choose appropriate prediction models for UMTS macro, micro and micro cells.
Calculate the number of sites required for certain grades of services in UMTS network
Understand the methodology of UMTS scrambling code planning
Describe the impact of handover and handover thresholds on WCDMA system performance
Dimension iteratively a WCDMA RAN
Course Outline
WCDMA Air Interface
UMTS RAN Architecture
UE Protocol Layers
Channel Concepts
OVSF and Scrambling Codes
Modulation
UMTS Uplink Budget
Rx Sensitivity
Eb/No Dependency
Log Normal Fading
Soft Handover Gain
Noise Rise
Uplink Load Factor
Mpole Capacity
UMTS Downlink Budget
Downlink Link Budget Dilemma
Downlink Parameters
Intercell interference
Cell Loading
Link Budget Analysis
Impact of Antenna Down tilt,
Sectorization and MHA on coverage and capacity
R99, HSDPA, HSUPA Power Budgets (Case Study)Objectives
Power per connection
R99 Link Budget
SINR in HSPDPA
SINR and Throughput simulation
HS-PDSCH link budget
E-DCH link budget
Prediction Models
Emperical Models
Okumura Hata
Hata-Cost 231
Walfish Ikegami
SPM Model
Keenan Motley
Land Coverge Factors (RACE)
WCDMA Base Station Planning
Site Selection
Site Survey
Antenna Selection
Antenna Height Selection
Pilot Pollution
2G/3G Cositing
Scrambling Code Planning
Acquisition of SC by UE
SC identification
Planning Assumptions
Case Study
