Voice over LTE (VoLTE) Workshop

Telecom professional using voice call on mobile device

This course provides participants with a good technical understanding of the different types of LTE voice endorsed by 3GPP and the LTE industry. It will cover in depth the procedural call flows and network optimization steps that are required to deliver high performance and quality voice services. The course also will cover Wi-Fi Calling (VoWiFi), its call flows, handover, and performance optimization for a holistic and uniform packet-based voice service.

  • Radio and Packet Core Engineers, Managers, and Project Managers
  • IP Engineers
  • Technical Product Managers
  • Technical Marketing Officials
  • Technical Strategy Officials
Instructor-Led Training
  • Classroom: 5 days
  • LIVE Virtual*: 35 hours
  • A minimum of 6 or more participants are required for a company-based LIVE Virtual course to commence
  • LIVE Virtual courses can be conducted for 5 hours or 7 hours daily. Please note that the number of training days will be extended if you opt for 5 hours daily.

There are no upcoming course dates currently scheduled for this course. If you are keen on attending this course, please register your interest and indicate your preferred start/end training dates via our course enquiry form for us to open a Classroom/LIVE Virtual class schedule for this course.

The course describes in-depth the technological solutions and standards that will enable the migration of telephony services (Voice and SMS) to LTE/EPC networks.

At the end of this course, participants will be able to:

  • Understand and describe VoLTE and Wi-Fi Calling
  • Understand the EPC/SAE architecture and its components in relation to VoLTE
  • Describe SRVCC and its evolution
  • Describe how IMS works and how is it related to Voice delivery
  • Describe E2E signalling of SIP, VoLTE and VoWiFi
  • Understand how to plan and optimize LTE & EPC to deliver VoLTE
  • Understand how to engineer both LTE and Wi-Fi for best possible VoLTE/VoWiFi Quality of Experience (QoE)

After successful completion of the course, participants will be proficient enough to design, plan and optimize a best-in-class VoLTE service that satisfies the current and future market requirements.

  1. VoLTE System Architecture
  • Evolved Packet Core Overview
  • Control and IMS overview
  • Interfaces for E2E VoLTE Experience Assurance
  1. VoLTE Functionality
  • Radio Functionality
  • EPC functionalities
  • IMS Identification
  • IMS Service Provisioning
  • IMS MMTel
  1. VoLTE End-to-End Signalling
  • Subscription & Device Configuration
  • EPS Attach and Default Bearer Activation
  • IMS SIP & SDP for VoLTE
    • SIP & SDP Technical Overview
    • SIP Message and Structure
    • SIP & SDP Parameters
    • SIP Addressing
    • SIP Interoperability
    • Call Message Flows
  • IMS Registration
  • IMS VoIP Session
  • VoLTE Codecs
  • Voice Continuity (SRVCC)
    • SRVCC Evolution
    • SRVCC Signalling (From Rel 8 to Rel 12)
  • E2E Call Flow Scenarios
    • VoLTE <-> VoLTE
    • VoLTE <-> 3G CS
    • VoLTE <-> PSTN
  • VoLTE emergency session
  • VoLTE Messaging
  • VoLTE Supplementary Services
    • End-to-End Signaling
    • Optimization
  • CS Fallback
  1. Voice over Wi-Fi Overview
  • Standardization: LTE <-> WiFi Voice Mobility
  • Hotspot 2.0
    • ISMP, ISRP
  • SiPTO
  • Diameter Messages
  • Functionality and Signalling of VoWiFi
    • Call Signalling
    • Media Streams
    • Call Setup and Mobility Procedures (S2a, S2b)
  • Trusted Wi-Fi Access in EPC
  • Untrusted Wi-Fi Access in EPC
  1. VoLTE Planning & Optimization
  • VoLTE Planning
  • LTE Radio (Coverage, Capacity, Codec, Radio Resource Allocation Optimization)
  • Mobile Backhaul and Transmission Requirements
  • DRX Optimizations
  • EPC & IMS Configurations
  • Wi-Fi / EPC
  • VoLTE KPIs and AQ-KPIs – Optimizing E2E User Experience
  1. Voice over WiFi Planning & Optmization
  • VoWiFi Audit & Survey
  • Traffic / Capacity Planning
  • QoS and Codec Optimization
  • 802.11e Extensions, WMM
  1. E2E VoLTE/VoWiFi QoE
  • UE Capabilities
    • VoLTE, SRVCC
    • FGI
    • VoWiFi (EAP-SIM, WMM, HS2.0)
  • MOS for VoLTE
  • Engineering E2E Voice QoE
    • Optimization Radio
    • Optimization IP Layer
    • 3G <-> VoLTE
    • VoLTE <-> VoWiFi
  • A basic knowledge of the LTE/EPC and legacy 2G/3G systems (GSM/UMTS)
  • A basic understanding of IP-based communications

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