1. Mobicents Diameter
Rio, Brazil
3rd Oct 2012
http://code.google.com/p/jdiameter/
Alexandre Mendonça
Bartosz Baranowski

2. Agenda
● Overview
○ Diameter Basics
○ Architecture
○ Base Use Cases
● Past Achievements
○ 2011/2012 Roadmap
● Future Goals
○ 2012/2013 Roadmap

3. Diameter Basics
● Next Generation RADIUS (AAA)
● Byte oriented
○ 32b(instead of 8b)
○ TLV encoded
■ Messages
■ Payload
● Modular
○ Base Protocol
■ Messages and Payload
■ Basic Procedures
■ Connection
■ Routing
■ Security
○ Application
■ All extra content

4. Architecture overview

5. Core Architecture
● Pluggable
○ Applications
○ Subsystems
■ Timers
■ Connection Factories
■ Threading
■ Cache/FT/HA
■ Configuration
● Highly Configurable

6. Architecture HA&FT

7. FT/HA Overview
● Based on Mobicents Cluster
● Utilizes FT Timers
● Distinction between HA/FT capable sessions
● Sessions available for any supporting node
○ Node can pick Session at any time
○ Reconstructed object is kept for performance reasons
○ Session objects are synchronized
○ Once session expires, each object is being expunged

8. Base Use Cases
● Base ● Cx (CSCF ↔ HSS)
○ Authentication ○ Send Subscriber Data
○ Accounting to S-CSCF
● CCA ● Dx (CSCF ↔ SLF)
○ Credit Control ○ Locate correct HSS
● Ro (AS ↔ OCS) ● Rx (P-CSCF ↔ PCRF)
○ Online Charging ○ Exchange policy and
● Rf (AS ↔ OFCS) charging related data
○ Offline Charging ● S6a (MEE ↔ HSS)
● Gq' (AF ↔ SPDF) ○ Exchange subscription
○ Exchange decision policy and authentication data
related data ● Sh (AS ↔ HSS)
● Gx (PCEF ↔ PCRF) ○ Exchange user profile
○ Exchange decision data
policy related data

9. Base Use Cases

10. Past achievements 2011/2012
● 10+ application already supported
● Agent support
● ~TLS
● Stablility
○ Memory
○ Performance
■ 9000+/s - @Core 2 Duo 3GHz/4GB RAM
● Dictionary
○ AVP
○ Messages
● Validator
● Growing Base of Community Users

11. Diameter Interest
● Dozens of Contributions
○ 20+ Contributors
○ Major Contributions
■ Stack Enhancements
■ New Applications
■ Non-trivial Issues
● Most Used Applications
○ Credit-Control-Application (CCA)
○ Ro/Rf
○ Sh
○ Gx, Rx, S6a
● One of the most downloaded projects!

12. Missed in 2011/2012
● Support for SCTP
○ Contribution by community user available. Requires
review and testing
● Per component tests
○ Work in Progress
● LB integration
● Examples
○ Promote a call for examples from community!

13. Roadmap 2012/2013
Main Goals Overview
● Improve Out-of-box Experience
○ Create Tutorials/Documentation on "Getting Started with
Mobicents Diameter"
○ Create Real-World Useful Examples
● Developer Friendly
○ Improve Documentation on Developing with Mobicents
Diameter Stack
○ Create Maven Archetypes
● Promote Mobicents Diameter
○ Turn Examples/Prototypes into Products
○ Blog about important/new features!

14. Roadmap 2012/2013
● Current tasks
○ Per component tests
○ CI jobs
● 1.5.0.FINAL
○ TLS hardening and perf testing
○ SCTP support
○ Update Documentation
○ Improve connection management procedures
○ Session injection/recreation
○ Improve configuration lookups

15. Roadmap 2012/2013
● 1.6.0.FINAL
○ LB integration
○ Pluggable and configurable LB/Peer selection
○ Configurable session timers
○ Improve Charging Server
● 1.7.0.FINAL
○ Examples and Agent functionality applications
○ Develop JAIN SLEE HSS Prototype
○ IPSec support

16. Finito
Questions ?