Long Term Evolution (LTE) is able to deliver significantly higher data rates to mobile subscribers at a lower cost per bit to wireless operators, due to its superior radio technology and Internet Protocol (IP) based packet architecture. Over time, LTE systems are expected to supplant and replace existing 2G and 3G wireless networks, such as GSM/UMTS and CDMA2000; however, in order to do so, LTE must also be capable of delivering high-quality and high-capacity voice services, which is a challenging task in packet networks. Voice over LTE (VoLTE) provides a standardized and simplified voice solution that can be deployed in any LTE network. This seminar describes the key characteristics of VoLTE, and walks the participants through typical VoLTE calls to illustrate how voice services can be provided in LTE networks.

Intended Audience

This seminar is intended for individuals interested in understanding the fundamental concepts and capabilities of Voice over LTE (VoLTE).

Learning Objectives

After completing this seminar, the student will be able to:

  • List the key goals and concepts of VoLTE
  • Describe the VoLTE architecture and its relationship to IMS
  • Sketch the call flow for typical VoLTE service scenarios
  • Explain how subscriber roaming and mobility are handled in VoLTE
  • Discuss solutions for voice interworking with existing 3G wireless networks

Seminar Topics

- VoLTE: What and Why

- VoLTE Architecture

a. IMS and PCC

b. PSTN interworking

c. Signaling protocols

- VoLTE Call Scenarios

a. Registration

b. Call establishment

c. E911/emergency calls

- Mobility and VoLTE

a. Roaming and IPX

b. Handovers

c. 3G interworking solutions