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  • Course Length:
  • 2 Days Instructor Led

This course describes the end-to-end 5G network (5GC, NG-RAN and IMS) and related operations for implementation of Voice over New Radio (VoNR). It provides key features and functionalities for the VoNR service including descriptions of the signaling procedures for IMS registration, Call Setup and release. The course also provides the description and signaling required for EPS fallback to VoLTE and procedures for emergency calling in 5G. The architecture for these services is described together with call flows showing the relationships between network functions in the 5G and 4G RAN and core systems and the IMS and PCC networks. The course will provide hands on exercises for students using log files if available.

Required Equipment
■ PC with access to Wireshark

This technical course is intended for planning, design, engineering and operations personnel who need an understanding of VoNR and EPS Fallback in 5G.

After completing this course, the student will be able to:
■ Sketch the architecture for voice services in 5G
■ Describe the VoNR and EPS fallback services
■ Illustrate the signaling flow for VoNR calls in 5G
■ Describe the codecs used for VoNR
■ Sketch the signaling procedures for EPS fallback
■ Identify call flows for emergency services in 5G

1. Voice services in 5G
1.1 4G, 5G and IMS network architecture
1.2 Introduction to EPS Fallback
1.3 Introduction to VoNR
Exercise: Voice Services Exercise

2. 5G and IMS Registration
2.1 Voice with IMS and VoNR
2.2 IMS Pre-Call Functions
2.3 IMS Registration
Exercise: 5G and IMS Registration

3. EPS Fallback
3.1 EPS and RAT Fallback
3.2 Call Origination with EPS Fallback
3.3 Call Termination with EPS Fallback
3.4 Ending the Call
Exercise: EPS Fallback

4. Voice over NR (VoNR)
4.1 VoNR Call Model
4.2 Call Setup
4.3 Resource Establishment
4.4 Call Termination
Exercise: VoNR exercise

5. Emergency calls in 5G
5.1 E-Call in 5G with VoNR
5.2 Call Setup – Pre-conditions Assumed
5.3 E-Call Using EPS Fallback
Exercise: Emergency calls in 5G

Suggested Prerequisites

5G Networks and Services

Working knowledge of VoLTE, LTE and IMS operations