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The IMS Volte Training course describes in a comprehensive – yet easily understandable – way how the IMS-based voice service is realized in LTE/EPS networks. The course explains SIP (Session Initiation Protocol), describes the IMS nodes and architecture and how LTE/EPS serves as an IP-CAN (IP Connectivity Access Network) as described in 3GPP specifications and GSMA (GSM Association) documents. The course also outlines how IMS interworks with other networks, e.g. for fixed and mobile traditional circuit-switched telephony. Throughout the course, message-level signaling flows are shown to illustrate various traffic cases, procedures and scenarios.
What Do Participants Learn?
The IMS Volte Training is an intermediate-level technical training focused on GSMA IR.92 IMS Profile for Voice and SMS over LTE. VoLTE is presented in the broad context of existing multi-RAT mobile systems. Hence, the training explains not only IMS architecture and procedures but also the integration of VoLTE with the existing network infrastructure and services (including CSFB and SMSoSGs).
Who Should Attend?
This training is an excellent choice for engineers and managers who are already familiar with LTE and are beginning to introduce VoLTE in their network.
What Will the Learning Experience Include?
Comprehensive pre-program activities include:
Web-based information forms & surveys completed by attendee.
Direct consultation with the attendee about the expectations.
During the training, participants engage in data, activities, and conversations that lead to insight and knowledge.
Participants learn from expert trainers who have both academic and business experiences.
Highly applicable training content & instructive activities for adding depth to training topics.
**A half-day site visit for integrating the experience & plan next steps. Opportunities to provide connections, ideas & support.
Explore & Practice
Apply & sustain the learning experience by using this ongoing support:
To ensure participant has new skills or behavior progress.
Optional, fee-based mentoring & coaching with the trainer.
Training materials & additional documents (e-books, pdf files, presentations and articles)
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3GPP System Overview
2G and 3G radio and core networks
LTE/EPS nodes, architecture and mode of operation
IMS architecture and motives for IMS
CS and PS voice scenarios
SIP – Session Initiation Protocol
SIP nodes and network architecture
User-Agent, Proxy Server, Registrar and Location Service
SIP Methods – requests and responses
SDP, RTP and RTCP
SIP Traffic Case
IMS – the IP Multimedia Subsystem
Multimedia over IP using SIP
IMS nodes and architecture
IP-CAN, CSCF (Call Session Control Function), HSS (Home Subscriber Server) and AS (Application Server)
IMS subscriber identities
Basic IMS traffic cases; Registration and Invitation
Attach and PDN Connection Setup in LTE/EPS
IP-CAN: How the terminal connects to IMS
Different EPS Bearers: Default vs Dedicated Bearer
LTE Attach for IMS
PGW selection and PDN Connection to IMS
The IMS Profile for Voice and SMS
GSMA PRD IR.92
Requirements on UEs and networks
Call setup traffic case
Multimedia Telephony (MMTel)
Policy and Charging Control (PCC)
PCC principles – what is it that PCC does?
Sessions, Bearers and Service Data Flows (SDF)
PCC nodes/functions (PCRF, SPR, AF and PCEF)
PCC for VoLTE
VoLTE Roaming and Interworking
Some Roaming and Interworking Scenarios
Local breakout vs home routed traffic
IMS Interworking with CS Networks
Breakout to CS Domain: roles of ENUM, BGCF, MGCF and IM-MGW