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Quality of Service at the Internet Engineering Task Force

2. 1-3 October 2003. Workshop on End-to-End Quality of Service. What is it? How do we get it?. QoS: What Is It?. In its broadest sense, QoS refers to

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Quality of Service at the Internet Engineering Task Force

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    1. Quality of Service at the Internet Engineering Task Force Robert Hancock Siemens/Roke Manor Research John Loughney Nokia; NSIS w.g. chair

    2. 2 1-3 October 2003 Workshop on End-to-End Quality of Service. What is it? How do we get it? QoS: What Is It? In its broadest sense, QoS refers to “the ability to ensure the quality of the end user (human) experience” This can encompass a huge range of technological and other aspects Multimedia coding and quality measurement SLA definition and performance verification Application behaviour to select QoS High performance physical and link layers Packet delivery (primary IETF focus)

    3. 3 1-3 October 2003 Workshop on End-to-End Quality of Service. What is it? How do we get it? The IETF: What Is It? A collection of individuals, developing standards for the Internet since 1986 1-2 thousand people, meeting 3 times/year Work is done in working groups, which usually define and develop a specific technology and then terminate Currently ? 130 WGs, of which ? 90 are active WGs are organised into Areas; the Area Directors constitute the Internet Engineering Steering Group (IESG) The Internet Architecture Board (IAB) provides architectural guidance and handles liaisons

    4. 4 1-3 October 2003 Workshop on End-to-End Quality of Service. What is it? How do we get it? Scope of the IETF Formally, the IETF will work on a topic if: There is community momentum behind it “People who want work done must drive it” A working group has the mandate to do it WG activities are scoped by charters Or, a working group can be formed to do it WG formation requires (IESG) approval The technical direction is ‘IETF-compatible’ Fit the general architecture of the Internet; be compatible with/complementary to existing protocols; match a well-defined problem

    5. 5 1-3 October 2003 Workshop on End-to-End Quality of Service. What is it? How do we get it? The Role of the IETF in QoS Work on QoS has focussed on the stack “above the wire and below the application” We don’t standardise media coding but care about how it drives QoS requirements We don’t standardise link layers but care about how they constrain network behaviour The IETF likes to develop solution components which are widely applicable We don’t standardise or mandate network architectures for delivering QoS But we have 2 models to help understand how specific technologies fit the ‘big picture’

    6. 6 1-3 October 2003 Workshop on End-to-End Quality of Service. What is it? How do we get it? Current QoS Activities Work in the IETF on QoS-related subjects has its centre of gravity in the “Transport” Area E2E protocols for transporting real time or other non-best-efforts traffic avt, dccp, pwe3 Application and network signalling and control NSIS, mmusic, sip/sipping Performance monitoring and measurement ippm (see also Operations Area) Specific activities on voice (less QoS-centric) iptel, speechsc, (megaco)

    7. 7 1-3 October 2003 Workshop on End-to-End Quality of Service. What is it? How do we get it? Principal IETF QoS Technologies

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