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Voice Over LTE Training | VoLTE Training

Voice Over LTE Training | VoLTE Training

Voice Over LTE Training or VoLTE Training:

Voice Over LTE Training or VoLTE Training Course Description

3GPP2 had originally intended LTE as an IP-based technology that would handle voice by reverting to 2G/3G or by employing VoIP. Mobile operators perceived this as a lack of standardization and are also facing increasing competition from OTT (Over the Top) applications such as Skype and WhatsApp.

VoLTE offers a standard for voice and messaging over LTE, provides for handover from/to legacy networks, allows the carriers to use an economical mix of available technology options (2G, 3G, or 4G), and helps them counter the OTT threat. This Voice Over LTE Training or VoLTE Training course will help you understand and realize the potential of VoLTE. Covered in detail are VoLTE as well as alternatives technologies such as CSFB to WCDMA and CSFB to CDMA2000

What’s Included?

  • 3 days of Voice Over LTE Training or VoLTE Training with an expert instructor
  • Voice Over LTE Training or VoLTE Training Electronic Course Guide
  • Certificate of Completion
  • 100% Satisfaction Guarantee


Related Courses

Customize It:

  • If you are familiar with some aspects of Voice Over LTE Training – VoLTE Training, we can omit or shorten their discussion.
  • We can adjust the emphasis placed on the various topics or build the Voice Over LTE Training – VoLTE Training course around the mix of technologies of interest to you (including technologies other than those included in this outline).
  • If your background is nontechnical, we can exclude the more technical topics, include the topics that may be of special interest to you (e.g., as a manager or policy-maker), and present the Voice Over LTE Training – VoLTE Training course in a manner understandable to lay audiences.

Audience/Target Group:

The target audience for this Voice Over LTE Training – VoLTE Training course:

  • Engineers and Non-Engineers interested in Voice over LTE concepts, architecture, frameworks, protocols, technologies, profiles, and deployments.


After completing this Voice Over LTE Training or VoLTE Training course, attendees will be able to:

  • Understand the key concepts behind LTE, IMS, MMTel, and VoLTE
  • Explore the VoLTE architecture
  • Discuss similarities and differences between Circuit-Switched Fallback (CSFB), Single Radio Voice Call Continuity (SRVCC), and Voice over IMS
  • Discuss IMS Profile for Voice and SMS defined by GSMA
  • Learn about the IMS feature set, IMS media, radio and packet core features, and common VoLTE functionalities
  • Discuss EPC architecture and IMS signaling
  • Explore IMS network architecture, services, elements, and protocols to support voice, SMS, and video
  • Identify the role of key network nodes, interfaces, protocols, media control, and related protocols
  • Discuss PCC, QoS, and security supporting VoLTE
  • Discuss IMS registration procedures
  • Understand GSMA VoLTE profile and role of AS, RCS, MMTel, and ICS
  • Understand call flows, SMS, roaming, charging, QoS, and security in LTE-EPC and IMS networks
  • Discuss VoLTE call flows and establishment
  • Discuss PCC interactions and SIP/SDP message details
  • Discuss detailed VoLTE security mechanism

Course Syllabus:

Introduction  to Long Term Evolution (LTE)

  • Introduction to LTE (Long Term Evolution) and SAE/EPC/EPS
  • Network nodes and roles of HSS, MME, S-GW, P-GW, enhanced Packet Data Gateway (ePDG) and PCRF
  • LTE/SAE/EPC Network Architecture
  • Overview EPS
  • Architecture and node functions
  • EPS network architecture and components
  • EPS bearers
  • EPS QoS
  • Idle and connected mode mobility
  • EPS protocol stacks
  • Basic EPS signaling procedures
  • Key interfaces: S1, S5, S6, S10, and S11
  • Key features and services
  • Ethernet Backhaul for LTE
  • PCC (Policy and Charging Control
  • LTE and EPC Security

Introduction to VoLTE (Voice over LTE)

  • What is VoLTE?
  • LTE Voice Solution Alternatives
  • Overview of CSFB, SRVCC, and Voice over IMS
  • Introduction of Circuit Switched FallBack (CSFB)
  • EPS Reference Architecture for CSFB with UTRAN
  • Voice over LTE via GAN (VoLGA)
  • The aim of VoLGA
  • High-level VoLGA Service Diagram
  • Introduction of Single Radio Voice Call Continuity (SRVCC)
  • Rich Communication Suite (RCS)
  • EPS Reference Architecture for Single Radio Voice Call Continuity (SRVCC) to UTRAN as Destination Network
  • SRVCC from LTE to 3GPP2 C2K
  • All IP voice and video, IMS
  • LTE voice evolution—all-IP network
  • VoLTE Network Configuration with IMS
  • VoLTE System Architecture
  • Evolved Packet Core (EPC)
  • EPC Entities and Functionalities
  • EPS Mobility Management
  • EPS Session Management and QoS
  • IP Multimedia Subsystem (IMS) Architecture
  • Home Subscriber Server (HSS)
  • Policy and Charging Rule Function (PCRF)
  • Overview of IMS Profile for Voice and SMS
  • UE and Network Protocol Stacks in IMS Profile for Voice
  • Supplementary Service Supported in VoLTE
  • AMR codec and AMR-WB codec
  • LTE RAN Features Reference
  • Semi-Persistent Scheduling 3GPP 36.321
  • Transmission Time Interval (TTI) Bundling 3GPP 36.321
  • Discontinuous Reception (DRX) 3GPP 43.013
  • Robust Header Compression (RoHC) IETF RFC4815

Introduction to  IP Multimedia Subsystem (IMS)

  • What is IMS?
  • Service creation and delivery
  • IMS elements
  • IMS Protocols and Messages
  • SIP protocol for session control
  • Service elements and functions
  • IMS resource and media control elements
  • Signaling and transport interworking elements
  • Session Control in the IMS
  • Media Encoding
  • Media Transport
  • SIP and Diameter in the IMS
  • Interfaces and Protocols
  • SIP extensions for IMS

IMS Architecture, Interfaces, and Protocols

  • CSCF (Call Session Control Function)
  • S-CSCF (Serving-CSCF)
  • I-CSCF (Interrogating-CSCF)
  • P-CSCF (Proxy-CSCF)
  • HSS (Home Subscriber Server)
  • SLF (Subscription Locator Function)
  • Policy Decision Function (PDF)
  • AS (Application Server)
  • MGCF (Media Gateway Control Function)
  • MGW (Media Gateway)
  • BGCF (Breakout Gateway Control Function)
  • IP Multimedia Service Switching Function (IM-SSF)
  • Media Resource Function Controller (MRFC)
  • Media Resource Function Processor (MRFP)
  • SCIM, OSA-SCS, IM-SSF Addressing
  • Service-oriented Interconnection (SoIx)
  • Connectivity oriented Interconnection (CoIx)
  • Interconnection Border Control Function (IBCF)
  • IMS-ALG (IMS Application Layer Gateway)
  • Media Resource Broker (MRB)
  • TrGW (Translation Gateway)
  • IMS Security Registration
  • Call origination and termination
  • Roaming and Handovers
  • Supplementary Services
  • Session renegotiation
  • External Services (VHE, OSA)
  • IMS Security Architecture
  • IMS Session Establishment
  • Interworking
  • Charging, Policy & QoS
  • PCC (Policy and Charging Control)
  • Diameter in IMS
  • Defining IMS-Related Interfaces

IMS Operational Scenarios for VoLTE

  • IMS IDs
  • IMS Public User Identity
  • IMS Private User Identity
  • Identification of User’s Device
  • Identification of Network Entities
  • Identification of Services (Public Service Identities)
  • IMS Private User Identity (IMPI)
  • IMS Public User Identity (IMPU)
  • VoLTE UE Registration
  • Subscription requirements
  • Supplementary services
  • Call Set-up
  • PSTN Break-out
  • Services in IMS Registration
  • Call origination and termination
  • Charging implications
  • Roaming and handovers
  • Quality of service
  • Media Resource Reservation and Policy Control
  • IMS Security
  • Privacy implications
  • Authentication

GSMA IR.92 IMS Profile for Voice and SMS

  • IMS Feature Set
  • Support of generic IMS functions
  • Supplementary Services
  • SMS over IPv4/IPv6
  • IMS Media
  • Voice Media
  • Radio and Packet Core Feature Set
  • Emergency Service
  • Roaming Considerations

GSMA IR.94 IMS Profile for Conversational Video

  • IMS Feature Set
  • Support of Generic IMS Functions
  • SIP Registration Procedures
  • Call Establishment and Termination
  • Early Media
  • Supplementary Services
  • IMS Media
  • RTP Payload Format Considerations for
  • Radio and Packet Core Feature Set for Video
  • Bearer Considerations for Video
  • LTE Radio Capabilities

VoTE Functionalists and Features

  • Radio Functionalists
  • Bearers and Scheduling
  • UE Radio Access Capabilities for VoLTE
  • LTE RAN Features
  • Semi-Persistent Scheduling
  • Transmission Time Interval (TTI) Bundling
  • Discontinuous Reception (DRX)
  • Robust Header Compression (RoHC)
  • Policy and charging control architecture
  • QoS and Multiple Bearers (Default, Dedicated)
  • QoS Class Identifiers (QCIs)
  • PDN Connectivity Establishment for the VoLTE User
  • IMS Identification
  • Voice over LTE use cases

Key Technical Requirements for VoLTE

  • QCI Values for the Bearers
  • Mandatory SIP Headers
  • Getting Connected
  • Call and Media Handling
  • Handover from LTE to Circuit-Switched
  • CS Fallback for Evolved Packet System
  • The architecture of CS Fallback for EPS
  • Idle Mode Signaling Reduction and Use of CS Fallback for EPS
  • CS Fallback Attachment
  • Mobile Originating and Terminating
  • Call Using CSFB
  • Single Radio Voice Call Continuity (SRVCC)
  • Mobile Terminating Roaming Retry and Forwarding
  • IMS Profile for Voice and SMS
  • Telephony service and supplementary services
  • IMS control and media
  • IP flow and bearer management
  • LTE radio capabilities
  • Multi-media Telephony (MMTel) Supplementary Services
  • A range of Codes used in IMS and Mobile networks
  • Service Centralization and Continuity Application Server (SCC AS)
  • PSTN interworking
  • VoLTE Signaling protocols
  • VoLTE Call Scenarios
  • Bearer Concept & QoS-Architecture
  • Dedicated EPS Bearer Establishment
  • IMS triggered during Call Establishment
  • Requirements for protecting  VoLTE traffic

VoLTE End to End Signaling

  • Overview of SIP and SDP
  • Overview of RTP and RTCP
  • VoLTE Call
  • IMS VoLTE Procedures
  • PDN Connectivity
  • NAS Signaling
  • Signaling Bearer, DCCH, and Attach Request
  • UE Authentication
  • Bearer Setup and EPS Attach
  • EPS Session Management (ESM)
  • UE P-CSCF Discovery
  • SIP Registration
  • Overview of AKAv2-MD5
  • Event Subscription
  • VoLTE Subscription and Device Configuration
  • EPS Attach for CSFB
  • IMS VoIP and Default Bearer Activation
  • IMS Registration
  • Constructing the REGISTER Request
  • UE to the P-CSCF, P-CSCF to the I-CSCF, and I-CSCF to the S-CSCF
  • S-CSCF Challenges the UE
  • UE’s Response to the Challenge
  • Registration at the S-CSCF
  • The 200 (OK) Response
  • Third-Party Registration to Application Servers
  • Subscription to Registration Event Package
  • Re-Registration and Re-Authentication
  • De-Registration
  • SIP Headers and Codes
  • Quick Overview of AMR and AMR-WB

EPS Architecture for Voice and Messaging Support

  • Applied IMS Feature Set
  • Support of generic IMS functions
  • SIP Registration Procedures
  • IMS Media
  • Bearer Management
  • Common Functionalists
  • Policy and charging control architecture
  • Complementing IMS with CS
  • Attachment with E-UTRAN
  • CS Fallback
  • IMS and PCC
  • Registration
  • Call establishment
  • E911/emergency calls
  • IMS Emergency Session
  • PDN Connection Setup for Emergency Session
  • Emergency Registration
  • Emergency Session
  • Mobility and VoLTE
  • Roaming and IPX
  • Handovers
  • Interworking solutions with 3G and WiFi
  • VoLTE Messaging
  • Native IMS Messaging
  • SMS Interworking
  • Multimedia Messaging Service
  • Unstructured Supplementary Services Data Simulation in IMS
  • VoLTE Roadmaps, VoLTE Call Traces, and Reference Guide

VoLTE Call Flows

  • VoLTE Call Flow – Basic IMS Registration
  • VoLTE/IMS Procedures PDN Connectivity (NAS Signaling)
  • Authentication
  • Bearer Setup and EPS Attach
  • Multiple Bearers (Default, Dedicated)
  • QoS Class Identifiers (QCIs)
  • GBR and Non-GBR
  • Standardized QCIs for LTE
  • P-CSCF Discovery
  • SIP Registration
  • Event Subscription
  • VoLTE Call Flow
  • SMS over LTE/EPC/IMS
  • VoLTE Security
  • VoLTE Protection vs.  Latency
  • Protecting VoLTE services against malicious attacks
  • VoLTE Service Disruption Scenarios and Mitigation
  • Network Failures


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