telxperts telecom trainings

Voice over Long-Term Evolution (VoLTE) and RCS Certification Course (Comprehensive)


Location: Online

Duration: 2 Days

From-To: 2016-07-20 to 2016-07-21

Product Description

Course Overview

The growing trends in mobile broadband have created a world of opportunities and opened up new challenges, and mobile broadband tests for the enhancement of communication services, such as voice, which are expected to generate 10 billion dollar revenue by 2020 for LTE/HSPA Networks. While LTE networks deliver mobile broadband services with greater data capacity and lower latency, the globally interoperable IP-based voice and video calling services for LTE, known as VoLTE, has enabled development of new innovative communication services like evolved HD voice, audio/video sharing within a call and video communication over IP networks.

This course provides deep insight to all aspects of Voice over LTE (VoLTE) including VoLTE Fundamentals, Evolved Packet Core (EPC) in conjunction with IP Multimedia Subsystem (IMS) to deliver various services, VoLTE architecture, VoLTE network nodes and VoLTE protocols. Subsequently full end to-end LTE and IMS signalling procedures will be examined, including initial attach and registration, bearer and QoS control and SIP/SDP interaction for various call and non-call related situations. The comprehensive training course investigates the core concepts in VoLTE such as VoLTE interfaces, session handling, media and control, VoLTE frameworks and profiles, VoLTE operational scenarios, QoS, security,charging and roaming.

Key Benefits for Participants

This course will provide the following key benefits to the attendees:

  • Understand the fundamentals of LTE, IMS, and VoLTE
  • Understanding the VoLTE architecture, Single Radio Voice Call Continuity (SRVCC) and Voice over IMS and Rich Communication Suite
  • Deep insight to IMS Profiles for Voice and SMS defined by GSMA
  • Learn about IMS architecture, IMS protocols, resource and media control elements to support voice, SMS and video
  • Explore IMS operational procedures for VoLTE
  • Identify the role of key network nodes, interfaces, protocols, media control and related protocols
  • Discuss Functionalities, QoS and key technical requirements for VoLTE
  • Discuss VoLTE End-to-End Signaling and EPS Session Mangement
  • Understand VoLTE call flows, SMS, roaming, charging, QoS and security in LTE-EPC and IMS networks

Course Objectives

This course has the following major objectives:

  • Provide comprehensive knowledge about LTE Voice Evolution, VoLTE, SRVCC and Voice over IMS
  • Deliver insights about VoLTE System Architecture, Network Configuration with IMS, and UE and Network Protocol Stacks in IMS Profile for Voice
  • Provide detailed insight to IMS Architecture, interfaces, protocols, signaling, elements and Switching function
  • Detailed insights to IMS Session Establishment, Charging policy and QoS for VoLTE
  • Comprehensive knowledge about IMS Handover, security and Services in IMS Registration
  • Provide deep understanding of GSMA IMS Profiles for  Voice, SMS and conversational Video
  • Explain EPS Architecture for Voice and text Support, VoLTE Call Flows and Standarddized QCIs for LTE in Detail


Course Outline

In “Voice over Long-Term Evolution  (VoLTE) and RCS Certification Course (Overview)”, we cover the fundamentals of the LTE, VoLTE and RCS technology, while in “Voice over Long-Term Evolution  (VoLTE) and RCS Certification Course (Comprehensive)” we cover the following course contents:

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

VoLTE 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
  • 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

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
  • TONEX 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


Delivery Options

  • Online
  • Onsite

Who Should Attend 

  • Non-technical managers who are interested in Voice over LTE concepts and architecture
  • Technical persons, engineers requiring in depth knowledge about VoLTE frameworks, protocols, technologies,profiles and deployments.


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