1. Controlling Internet Quality with Price Market Managed Multi-service Internet Bob Briscoe BTexact Research, Edge Lab, University College London & M3I Technical Director

2. Apr 2002Controlling Internet Quality with Price 2 M3I self-managing Internet resources –through market forces show validity of approach through: –economic and network modelling –software and network engineering design & prototyping –customer experiments

3. Apr 2002Controlling Internet Quality with Price 3 pricing principles edge pricing & bilateral contracts - strict (be able to) price approaching congestion (be able to) price at service granularity - no flows, no SLAs (be able to) introduce new tariffs & mechs - policy ctrl (be able to) be commercially open - bundling, re-sale minimise then synthesise –design end to end –then synthesise services at edge - technical & commercial price utilisation

4. Apr 2002Controlling Internet Quality with Price 4 end to end QoS means... 4QoS synthesised by the ends 4scalability and evolvability 8not just QoS everywhere along the path 8integrated services arch (Intserv), 8differentiated services SLAs (Diffserv) 4ECN + diffserv field... computing industry vs. networking industry QoS

5. Apr 2002Controlling Internet Quality with Price 5 Dynamic Price Handler agent Video Player Video Server Network Service Customer Network Content Provider Video Data Meter Marking Marking rate Requested Rate Charge = #mk. price/mk DPH agent QoS Buying Policy Editor Charge Reactor short term linear rate policy non-linear demand function max target rate, x inelastic congestion price elastic Rate Controller Policy Editor 1 probability drop ave queue length mark

6. Apr 2002Controlling Internet Quality with Price 6 e2e = tussle of industries network operators & vendors think: QoS = added value e2e = beyond the horizon (scalability & evolvability) solve dilemma: –design for e2e QoS –then pull back control into edge under policy control tariff = policy [M3I architecture] –when network-centric QoS commoditises (5-7yrs)......expose raw e2e QoS interfaces as option e.g. for computer-computer traffic nownextfuture

7. Apr 2002Controlling Internet Quality with Price 7 ECN cloud network provider synthesised admission control dynamic congestion pricing  session admission control packet QoS  session QoS guaranteed QoS indistinguishable from Intserv no per flow processing, no SLAs within ECN cloud customer 1 risk broker customer 2 risk broker dynamic offer stable offer dynamic offer stable offer QoS gate- way RSVP

8. Apr 2002Controlling Internet Quality with Price 8 summary end to end QoS design for it, but pull control back in, under policy control minimise then synthesise business models engineering QoS control time scales some applications may need per-packet QoS control if network only understands longer time scale policy requests –can’t ever delegate per packet control outwards 4only ECN & diffserv field in core 8no Intserv or Diffserv SLAs in core

9. Apr 2002Controlling Internet Quality with Price 9 no time for... e2e QoS stability second order dynamics of e2e QoS user experiments on utility of stability ECN with wireless access (no buffers) enabling business model innovation –active tariff objects for policy control of QoS control architecture of charging system, rate controllers, etc. –wholesale market structure inter-domain pricing, price-based routing avoiding global business models (carrier selection) –retail market structure multi-homing, provider selection by quality-value avoiding global business models (roaming, termination charges) SLAs irrelevant for retail market

10. Apr 2002Controlling Internet Quality with Price 10 pricing principles edge pricing & bilateral contracts - strict (be able to) price approaching congestion (be able to) price at service granularity - no flows, no SLAs (be able to) introduce new tariffs & mechs - policy ctrl (be able to) be commercially open - bundling, re-sale minimise then synthesise –design end to end –then synthesise services at edge - technical & commercial

11. Apr 2002Controlling Internet Quality with Price 11 more info M3I project Jan 2000 - Mar 2002 first papers and deliverables http://www.m3i.org/ Bob Briscoe: http://www.btexact.com/people/briscorj/