📘 Course Title
CSFB & VoLTE Basics & Optimization
📝 Course Description
This course provides a complete and practical understanding of voice services in LTE networks, covering both Circuit Switched Fallback (CSFB) and Voice over LTE (VoLTE) from architecture and call flows to optimization techniques and KPI analysis.
The course explains the transition of voice services from circuit-switched to packet-switched networks, highlighting how CSFB operates in legacy-integrated LTE networks and how VoLTE delivers native packet-based voice using IMS and SIP signaling.
It focuses on real network behavior, optimization parameters, and performance KPIs used by operators to improve voice quality and call success rates.
⏱ Course Duration
7 Hours
🎯 Target Audience
- Telecom & Communication Engineering students
- LTE / 4G engineers
- RF optimization and performance engineers
- Core and RAN engineers working with voice services
- Drive Test engineers involved in voice troubleshooting
- Engineers preparing for VoLTE and voice optimization roles
✅ Prerequisites
- LTE / 4G Fundamentals
🌐 Language
Arabic with English subtitles
🎯 Learning Outcomes
By the end of this course, learners will be able to:
- Understand circuit-switched and packet-switched voice concepts
- Explain how voice calls are handled in LTE networks
- Analyze CSFB call flows and different CSFB mechanisms
- Optimize CSFB performance using parameters and KPIs
- Understand VoLTE architecture and advantages
- Explain IMS architecture and SIP signaling basics
- Analyze VoLTE registration and call flows
- Understand SRVCC procedures and KPIs
- Optimize VoLTE voice quality using scheduling features
- Analyze VoLTE KPIs and performance issues
📚 Course Content Outline
Section 1: Introduction
- Course overview
- Review of CS and PS concepts
- LTE network architecture revision
- LTE bearers
- Introduction to voice services in LTE
Section 2: CSFB – Circuit Switched Fallback
- CSFB requirements
- Mobile originated CSFB call flow
- Blind, flash, and measurement-based CSFB
- Mobile terminated CSFB call flow
- CSFB optimization parameters
- Key CSFB KPIs
Section 3: VoLTE – Voice over LTE
- VoLTE concepts and advantages
- LTE and VoLTE basics revision
- HD voice coding in VoLTE
- IMS architecture
- SIP fundamentals
- VoLTE QCIs
- Registration flow
- VoLTE call scenarios
- SIP messages analysis
- LTE handover revision
- SRVCC procedures
- SRVCC parameters and KPIs
- Dynamic scheduling
- Semi-Persistent Scheduling (SPS)
- TTI bundling
- TTI bundling parameters and KPIs
🚀 Course Value
- Complete voice services track for LTE networks
- Strong focus on real call flows and optimization parameters
- Covers both legacy CSFB and native VoLTE
- KPI-driven optimization approach
- Ideal preparation for Voice, Core, and LTE Optimization roles