Prerequisites
General knowledge about the architecture, terminology and modes of operation of 3GPP Networks is recommended as well as basic knowledge of the Internet Protocol (IP).
Course content
Diameter Introduction
- What is Diameter used for?
- Diameter Base Protocol, RFC 6733
- Diameter Clients, Servers and Agents
- Realms
- Diameter Commands and Message Formats
- Attribute Value Pairs (AVPs)
- Diameter Application examples (NASREQ, Credit Control)
Peers and Transport
- User Sessions vs Peer Connections
- Transport layer: TLS/TCP and DTLS/SCTP
- Diameter Peers
- Static and Dynamic discovery of Peers
- Managing a Peer Connection
- Security considerations
Diameter Agents
- Why Agents?
- Relay Agent
- Redirect Agent
- Proxy Agent
- Translation Agent
Routing and Forwarding
- Routing and Forwarding of Diameter Commands
- Routing Tables and Peer Tables
Diameter in 3GPP Networks
- 3GPP Diameter interface overview
- Diameter Routing Agent (DRA) and Edge Agent (DEA)
- Selected Use Cases
- Real-life considerations
- Hosts and Realms in the 3GPP environment
EPC Interfaces
- Diameter for Location Management and Subscriber Data Handling
- S6a and S6d (and S7a & S7c)
- S13 and S13’
IMS Interfaces
- Diameter for Registration, Invitation, Location Management, Subscriber Data Handling, Online and Offline Charging
- Cx, Dx
- Sh, Dh
- Ro, Rf
Policy and Charging Control Interfaces
- Diameter for Policy and Charging Control (PCC)
- Gx and Rx, Sd
- Gy, Gz and Sy
- S9
