1. AG Projects QoS in Next Generation Networks Telecom Signaling Networks and Service Forum January 18, 2006 Amsterdam

2. AG Projects QoS in Next Generation Networks I am Adrian Georgescu

3. AG Projects QoS in Next Generation Networks I work for AG Projects, which is developing solutions for convergence of the Telecom and Internet

4. AG Projects QoS in Next Generation Networks The opinions expressed in this presentation belong to myself, my company and most of my friends

5. AG Projects QoS in Next Generation Networks QoS in Next Generation Networks

6. AG Projects QoS in Next Generation Networks Internet is a dumb network, the services (applications) are performed at the edge

7. AG Projects QoS in Next Generation Networks Dumb means: Internet role is simply to locate and route packets to the destination IP address

8. AG Projects QoS in Next Generation Networks Internet model is a best-effort with no guarantee

9. AG Projects QoS in Next Generation Networks Dont be fooled by the wording no guarantee

10. AG Projects QoS in Next Generation Networks All of you are using it today for your day to day work

11. AG Projects QoS in Next Generation Networks Best Effort is for the Best Reasons!

12. AG Projects QoS in Next Generation Networks Because allowing innovation is what made Internet a success!

13. AG Projects QoS in Next Generation Networks Ethernet is the most successful network transport protocol on Earth despite the fact that it does not have any QoS management built-in!

14. AG Projects QoS in Next Generation Networks Because it could be upgraded to 10, 100, 1000, 10000 Mbit/s without having to change a bit of the routing protocol or the applications on top of it!

15. AG Projects QoS in Next Generation Networks PSTN is a guaranteed transport medium with switched circuits (paths)

16. AG Projects QoS in Next Generation Networks The question today is: How do I guarantee a voice call will work with the expectation that it will not fail or it provides the quality we use to experience from PSTN?

17. AG Projects QoS in Next Generation Networks The answers you get today from you vendors: - We build IMS, we apply telco logic on top of Internet - We build and deploy bandwidth management systems, Pocket Cable, MPLS and others - Buy our own technology, it has QoS just stick with our proprietary stuff!

18. AG Projects QoS in Next Generation Networks Unfortunately, these answers do not address the problem They address only your pocket!

19. AG Projects QoS in Next Generation Networks 50 millions users of Skype proved that users are prepared to trade all PSTN guarantees with a new Internet application

20. AG Projects QoS in Next Generation Networks Lets try to find some real solutions which are also cost effective!

21. AG Projects QoS in Next Generation Networks Internet has two measurable performance parameters: 1. Round-trip time (RTT) Keep it below 200ms Keep it under 0.5%2. Packet loss (%)

22. AG Projects QoS in Next Generation Networks And two ways to deliver data: 1. UDP protocol (no guarantee of delivery but good for RT) 2. TCP protocol (guarantee of the delivery, very good for signaling bad for RT)

23. AG Projects QoS in Next Generation Networks And all these are confined into a bandwidth force-field

24. AG Projects QoS in Next Generation Networks Given enough bandwidth, no quality problem exists

25. AG Projects QoS in Next Generation Networks Is cheaper to increase the bandwidth than to build systems that managed the lack of it

26. AG Projects QoS in Next Generation Networks Do you imagine today a QoS management system for old dial-up Internet instead of going to broadband?

27. AG Projects QoS in Next Generation Networks Building QoS management systems is difficult, non- interoperable and expensive By the time such systems are deployed the bandwidth has doubled or more already, and you are stuck with a solution build for the past

28. AG Projects QoS in Next Generation Networks Internet performance has been improved dramatically in the last 10 years Source: http://www.slac.stanford.edu/xorg/icfa/icfa-net-paper-jan05/

29. AG Projects QoS in Next Generation Networks Complex systems cannot provide a solution for lack of bandwidth, any system added in the chain will put strains on QoS as well

30. AG Projects QoS in Next Generation Networks Other IP Networks IP Transport (Access and Core) T-MGF I-BGF UPSF P-CSCF I/S-CSCF BGCF SLF Charging Functions IWF PSTN Emulation (R2) Mw Mw/Mk/Mm Mr Mg Mj Mi MpMn Gm Gq' ISC Cx Dx Dh Sh Ic Rf/Ro Rf/Ro Ib Iw Gq' PSTN/ISDN SGF MRFC MGCF MRFP e4 Ie Mw IBCF Mk Application Servers Rf/Ro AGCF e2 P1 P2 P3 UE CNG MG IMS / PSTN Simulation Gq' - SPDF A-RACF Resource & Admission Control Resource & Admission Control SPDF Network Attachment Subsystem ReIa RCEF BGF Ut Overall ETSI TISPAN IMS Architecture – all subsystems

31. AG Projects QoS in Next Generation Networks To improve the quality of service experienced by your end-users you can follow common-sense best practices:

32. AG Projects QoS in Next Generation Networks 1. In the core, monitor the network to avoid congestion, network loads of 30%-40% are considered adequate for quality of service and for congestion avoidance 2. At the edge (last mile), provision two paths from the IAD to the first IP switch.This way RT applications will not collide with non-RT applications. Invest in last mile bandwidth upgrades instead of QoS management systems for it 3. In case of packet-loss use smart applications that automatically fail-over to other hosting center 4. Dont tunnel signaling and media to home network (like IMS does), use geographical distribution of resources 5. Use Internet codecs like iLBC or Speex instead of G.7xx

33. AG Projects QoS in Next Generation Networks QoS systems do not create bandwidth! Remember that:

34. AG Projects QoS in Next Generation Networks This presentation is available at: http://ag-projects.com

35. AG Projects QoS in Next Generation Networks Thank you, Adrian Georgescu ag@ag-projects.com