Rechenzentrum Universität Stuttgart Netze und Kommunikationssystem A. Cuevas RUS 15. Januar 2008 page 1 QoS-enabled Information Transport: Yet Another Operator Service Antonio Cuevas ( )

Rechenzentrum Universität Stuttgart Netze und Kommunikationssystem A. Cuevas RUS 15. Januar 2008 page 2 Index… n Introduction, state of the art and step beyond. n Benefits n Impact in NGN architectures

Rechenzentrum Universität Stuttgart Netze und Kommunikationssystem A. Cuevas RUS 15. Januar 2008 page 3 Implications of a universal IP network n Any device n Any access technology n Any Application n Plus business aspects, Service platforms

Rechenzentrum Universität Stuttgart Netze und Kommunikationssystem A. Cuevas RUS 15. Januar 2008 page 4 Aspects to be revisited n This complex ecosystem makes that aspects already settled need to be revisited: QoS, managing the network service (i.e. transporting bits end-to-end) n Maxisat in Finland provides QoS for triple play scenarios n Deustche Telekom CEO statement n Managing the information transport service in a finer way and integrated into the overall service delivery  IMS

Rechenzentrum Universität Stuttgart Netze und Kommunikationssystem A. Cuevas RUS 15. Januar 2008 page 5 3G UMTS network PERF as a GGSN CSCF (SIP Proxy) SIP signaling In IMS the CSCF-PCRF-PERF interaction assures that the flows receive tailored QoS Voice, Video PCRF CDF/ CGF HSS

Rechenzentrum Universität Stuttgart Netze und Kommunikationssystem A. Cuevas RUS 15. Januar 2008 page 6 Step forward n In IMS information transport service is subsidiary to the applications, a parameter of the applications,  bounded flexibility n PROPOSAL n Consider “information transport” as a service on its own, with its AAA characteristics and compose it with the other services using service composition techniques n Conceptual difference, but that brings many benefits

Rechenzentrum Universität Stuttgart Netze und Kommunikationssystem A. Cuevas RUS 15. Januar 2008 page 7 Index… n Introduction, state of the art and step beyond. n Benefits n Impact in NGN architectures

Rechenzentrum Universität Stuttgart Netze und Kommunikationssystem A. Cuevas RUS 15. Januar 2008 page 8 Network operator Communication endpoints Proxies Service providers Entities setting up the “information transport” session parameters QoS-enabled network infrastructure IMS’ CSCFs As a service, “information transport” can be opened to many parties

Rechenzentrum Universität Stuttgart Netze und Kommunikationssystem A. Cuevas RUS 15. Januar 2008 page 9 More open to different business models n Operator provides “information transport” n In semi-walled garden scenarios, it is aware of the “application level” services n Operator sees: n services, n=0 in the Internet case n In IMS, “information transport” is a parameter of the applications, not a service on its own, so n=0 not supported n In our case, “information Tx” service has its own AAA and can be composed with other services

Rechenzentrum Universität Stuttgart Netze und Kommunikationssystem A. Cuevas RUS 15. Januar 2008 page 10 Service composition techniques to deal with complex business scenarios n news streaming service with discounts from 9:00pm to 7:00am n depending on a specific n data transport service with discounts from 8:00pm to 6:00am. n By considering data transport as any other service and by employing existing service composition techniques, this conflictive situation can easily be handled at a service broker level (typically the network operator).

Rechenzentrum Universität Stuttgart Netze und Kommunikationssystem A. Cuevas RUS 15. Januar 2008 page 11 QoS in the IP networks forming the Internet and in the routers connecting them Tailoring to the Terminal (e.g. screen size) and context (driving, working) Transcoders QoS of the applications, e.g. negotiating the optimal codecs User control and pricing Many aspects affect QoE: service composition techniques to control them

Rechenzentrum Universität Stuttgart Netze und Kommunikationssystem A. Cuevas RUS 15. Januar 2008 page 12 Index… n Introduction, state of the art and step beyond. n Benefits n Impact in NGN architectures

Rechenzentrum Universität Stuttgart Netze und Kommunikationssystem A. Cuevas RUS 15. Januar 2008 page 13 Notion of session for the “information transport service” n A session is an instance of a service n Flow control in many NGN QoS architectures n RFC about setting up and tearing down “network reservations” using RSVP n We can think that a flow is a session of the “information transport” service –with QoS parameters or not n All flows need to be controlled, scalability concerns

Rechenzentrum Universität Stuttgart Netze und Kommunikationssystem A. Cuevas RUS 15. Januar 2008 page 14 DiffServ CN No access control, No session No need of flow-user association IntServ like AN, Access control, Sessions IntServ like AN Bandwidth Broker Flow state is not kept end-to-end… bundling these flows must be done

Rechenzentrum Universität Stuttgart Netze und Kommunikationssystem A. Cuevas RUS 15. Januar 2008 page 15 QoS-enabeld data transport system Transport session setup RSVP Router Bandwidth Broker COPS Decision outsourcing & configuration

Rechenzentrum Universität Stuttgart Netze und Kommunikationssystem A. Cuevas RUS 15. Januar 2008 page 16 Operator’s AAA System User & Packet correspondance QoS-enabled transport System Network and packets control Deals with packets parameters Divide and conquer technique Service Logic entity Reserves network ressources tailored to applications

Rechenzentrum Universität Stuttgart Netze und Kommunikationssystem A. Cuevas RUS 15. Januar 2008 page 17 Details about the AAA System function n Diameter NAS Application used to gain access to the network n Using e.g. IPSec user-packets correspondance is waranteed n IDEA n Divide “gain access to the network” and “information transport service” n Operator’s AAA System specialised in the first, network infraestructure in the second n Bundling must be provided

Rechenzentrum Universität Stuttgart Netze und Kommunikationssystem A. Cuevas RUS 15. Januar 2008 page 18 Sessions: Network Access (NA), Transport (T) and Application (A) Bundling Sessions: NA and T Bundling Sessions: T and A Transport System AAA System NA1T3 T1 NA2 T4 T2 User AUser B A2 A1

Rechenzentrum Universität Stuttgart Netze und Kommunikationssystem A. Cuevas RUS 15. Januar 2008 page 19 Thanks for your attention Questions?