IMS and PCC System Engineering
Course Details
The IP Multimedia Subsystem has been used to deliver IP based services to consumers for over two decades. Despite its slow introduction, the roll out of 4G VoLTE and 5G VoNR have served as the catalyst for today’s IMS deployments. This course seeks to provide a foundation level of knowledge on the architecture and operation of an IMS, covering areas such as key functional elements, registration, session establishment and finally, the crucial role that PCC (Policy and Charging Control) plays in many IMS networks.
Gavin Mitchell
Mpirical Trainer
Gavin heads up Mpirical’s training product portfolio, which includes all course development alongside the development of NetX. Gavin’s main area of focus is 4G and 5G core networks, with considerable expertise gained over the 20 years of training experience he has within the mobile telecommunications space.
£345
Individual Course
Module 1
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IMS Concepts and Architecture
IP Multimedia Subsystem Concepts:
- Open Systems.
- Media and Signalling Considerations.
- IMS Control Plane Protocols.
- IMS User Plane Protocols.
IMS Commercial Considerations:
- Seamless Mobility.
- IMS Services.
- IMS Specifications and Standards.
- Commercial Example – VoNR.
IMS Architecture:
- High Level Architecture.
- CSCF (Call Session Control Functions).
- P-CSCF, I-CSCF, S-CSCF
- HSS (Home Subscriber Server).
- IMS TAS (Telephony Application Server).
- Session Border Controllers.
- SBC, SBG, A-SBC, I-SBC
- IMS Deployment.
Supplementary Architectural Elements:
- Overview.
- MRF (Multimedia Resource Function).
- Media Server Capabilities.
- Media Server Deployment.
- PSTN Interworking.
- BGCF (Breakout Gateway Control Function)
- MGCF (Media Gateway Control Function).
- IM-MGW (IMS Media Gateway).
Module 2
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IMS Protocols
IMS Protocols – Session Initiation Protocol:
- SIP Features.
- SIP User Agents.
- SIP Message Exchange.
- SIP Message Format.
SIP Utilization:
- SIP Methods.
- SIP Message Body..
- SIP Responses.
Routing SIP Messages:
- SIP Proxies.
- Via: Header.
- Back to Back User Agents.
IMS Protocols – Diameter:
- Diameter Base Protocol.
- Diameter Base Header.
- Diameter Client and Server.
- Diameter Agents.
IMS Protocols – Service Based Architecture:
- Service Based Interface Concepts.
- SBI Protocol Stack.
- IMS Service Based Interfaces.
Module 3
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IMS Registration
IMS Identities.
IMS Registration Overview.
IMS Registration Analysis – Initial Registration:
- Initial Registration Request (UE to P-CSCF.)
- Forwarding the REGISTER (P-CSCF to I-CSCF).
- S-CSCF Selection.
IMS Authentication and Key Agreement:
- Authentication Options.
- Focus on IMS AKA.
- IMS-AKA Authentication Vector Generation.
- Authentication Challenge.
Reregistration and Subscriber Profile Acquisition:
- Second Register.
- Authentication and Subscriber Profile Acquisition.
- Service Profile and Final 200 OK.
Post Registration:
- Deregistration.
- Third Party Registration.
- Registration Event Subscription.
Service Configuration:
- Ut Interface.
- XCAP (XML Configuration Access Protocol).
Module 4
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IMS Session Establishment
Media Stream Considerations (SDP):
- SDP Architecture.
- Session Level Parameters.
- Media Level Parameters.
- SDP Offer Answer Model.
Media Stream Considerations (RTP):
- Real time Transport Protocol.
- Audio Transport.
- Port Usage for RTP/RTCP.
IMS Session Establishment (Voice Call):
- IMS Call Flow Summary.
- Access Transfer Functions.
- IMS Call Flow Analysis.
- Provisional Response Acknowledgement.
- Session Timers.
- Call Termination.
Converged IP Messaging:
- Standalone Messaging.
- Pager Mode Messaging.
- Large Message Mode.
IMS Charging Concepts:
- Charging Models.
- IMS Offline Charging.
- Accounting Requests.
- IMS Online Charging.
- Credit Control Request and Answer.
- Charging Identifiers.
Module 5
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Policy and Charging Control Fundamentals
Policy and Charging Control:
- PCC Overview.
- Enabling Policy Control.
- Monetizing Services Using Policy Control.
- Evolution of PCC.
PCC Architecture (Pre 5G):
- PCC Architecture Overview (Pre 5G).
- Rx Reference Point.
- Gx Reference Point.
- Sp Reference Point.
- 5 Gz Reference Point.
- Gy Reference Point.
- Sy Reference Point.
PCC Architecture (5G):
- PCC Architecture Overview (5G).
- N5 Reference Point.
- N7 Reference Point..
- N15 Reference Point.
- UE Related Policy Control.
- N28 Reference Point.
- N40 Reference Point.
PCC Operation:
- Applying PCC to Mobile Networks
- PCC Binding Mechanism..
- Session Binding.
- PCC and QoS Rule Authorization.
- Bearer Binding.
PCC Interaction Examples:
- LTE PDU Connection Establishment (Policy Session Establishment).
- LTE Dedicated Bearer Establishment.
- 5G PDU Session Establishment (Policy Session Establishment).
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