1. GSC-8015 14/04/2003 SOURCE:TSACC TITLE:End to end Quality of Service AGENDA ITEM:7.1..2 DECISIONX DISCUSSION INFORMATION End to End Quality of Service Paul Coverdale Nortel Networks Tel: +1 613 763 4277 Email: paulcov@nortelnetworks.com

2. 1 1 14/04/2003 GSC-8, OTTAWA End to end QoS everybody talks about it what does it mean ? how do we get it ?

3. 2 2 14/04/2003 GSC-8, OTTAWA Bottom-up approach to end to end QoS lots of attention on mechanisms and protocols for enabling QoS in individual IP domains these mechanisms drive resulting end to end QoS not clear on benefit to end-user QoS-enabled Domain 1 QoS-enabled Domain 2 QoS-enabled Domain n End to end QoS required by user (QoE)

4. 3 3 14/04/2003 GSC-8, OTTAWA Top-down approach to end to end QoS focus on customer (the one who pays the bill) understand end-user expectations for QoS Quality of Experience (QoE) use these to drive requirements for specific QoS mechanisms for individual domains QoS-enabled Domain 1 QoS-enabled Domain 2 QoS-enabled Domain n End to end QoS required by user (QoE)

5. 4 4 14/04/2003 GSC-8, OTTAWA End-user requirements wide range of user requirements, depending on application Zero loss 0% Packet Loss Command / control (eg Telnet, Interactive games) Conversational voice and video Voice/video messaging Streaming audio/video Transactions (eg E-commerce, Web-browsing, E- mail access) Messaging, Downloads (eg FTP, still image) Fax Background (eg Usenet) 5% 100 msec1 sec10 sec100 sec InteractiveResponsiveTimelyNon-critical Delay From ITU-T Rec. G.1010

6. 5 5 14/04/2003 GSC-8, OTTAWA Network QoS Classes no need to try to meet specific QoS requirements for each application provide several network QoS classes to carry traffic having broadly similar requirements From ITU-T Rec. Y.1541

7. 6 6 14/04/2003 GSC-8, OTTAWA Implementing end to end QoS two fundamentally different approaches Internet model Managed-Network model

8. 7 7 14/04/2003 GSC-8, OTTAWA Call Signalling QoS Signalling Application Plane Transport Plane Transport Domain 1 Transport Domain 2 Transport Domain 3 Internet model intelligence remains at network edge provides autonomy for end-points but who is responsible for end to end QoS ? Bearer Traffic

9. 8 8 14/04/2003 GSC-8, OTTAWA Application Plane Transport Plane Service Domain 1 Transport Domain 1 Transport Domain 2 Transport Domain 3 Service Domain 2 Managed-Network model service provider able to control end to end QoS but end-point tied to specific service provider Call Signalling QoS Signalling Bearer Traffic

10. 9 9 14/04/2003 GSC-8, OTTAWA Standards Bodies addressing QoS many Standards Bodies involved in QoS IETF, ITU, ETSI, 3GPP, 3GPP2, IEEE, T1, MEF, etc main focus on QoS mechanisms or on specific network elements (eg wireless or cable access) achieving complete end to end QoS is clearly a Standards issue need for better co-operation and co-ordination between Bodies to address end to end picture

11. 10 14/04/2003 GSC-8, OTTAWA Conclusions need for recognition and reconciliation of different viewpoints on QoS need for focus on the end-user need for better coordination between Standards Bodies ITU-T is well-positioned to take the leadership role ITU-T Workshop on End to End QoS planned for Oct 1-3 2003 Recommend GSC-8 should endorse a Resolution proposing ITU-T as prime Body for establishing global standards for end to end QoS