Re: [dispatch] Charter proposal for Q4S WG ( formerly Q-HTTP) Version 1

On 12/13/10 16:39, GARCIA ARANDA, JOSE JAVIER (JOSE JAVIER) wrote:
> Hi everybody,
> Here is the charter proposal for Q4S ( Quality for service) WG. This 
> WG will include the achieved works with  "Q-HTTP"
Forgive me if this has been asked before....

does this approach (out-of-band measurements on a different set of 
ports/protocols than in fact used by the application) assume that the 
network is not doing deep packet inspection or differential treatment of 
services?

Is there an interaction with DSCP packet marking - could the measurement 
setup specify DSCP codepoints to be set on packets (and, knowing that 
these are changed en route, report on the DSCP codepoints of incoming 
packets)?

In both points, it would be nice if the charter said whether it was in 
or out of scope.

                       Harald

> Thanks for your comments
> Description of Working group
> ============================
>    Problem Statement:
>    The QoS over Internet is a hot issue today. Current QoS handling
>    mechanisms used in  modern network transport layers (MPLS, RSVP,
>    Diffserv,Traffic Engineering) do not provide  themselves a
>    QoS-on-demand end-to-end solution and existing adaptative
>    solutions based on In-band Control protocols (such as RTCP)
>    are very difficult to combine with any other protocols for which
>    they have not been designed for.
>    Four Network Parameters comprises the QoS at application level:
>    Bandwidth, packet-loss, latency and Jitter.
>    Interactive-video applications define flows in both directions.
>    Different applications require different constraints (in terms of
>    latency, jitter, packet loss) in one or both directions and
>    different responsiveness. The proposed solution must be an
>    effective out-of-band application level protocol capable of
>    reacting when any of these constraints are violated. Such protocol
>    must trigger adaptive solutions and/or QoS network profile changes.
>    Currently content providers are only able to provide services based
>    on adaptative methods or last-mille deployments which prefer
>    dedicated network resources (vs. Internet), and therefore, restricts
>    the subscriber population and increases the costs.
>    Objetives:
>    The goal of this working group is to define a
>    QoS application-level  standard protocol optimized for its use over
>    the internet that may be widely implemented and easily managed
>    by application developers and service providers.
>    The core technical considerations for such protocol include, but
>    are not necessarily limited to, the following:
>    1. Protocol design to be used in interactive applications (including
>       virtualized videogames,and interative-video applications)
>    2. Ensuring interoperability with all existing transport protocols
>    3. Optimizing for low bit rates (typlically below 2.4 kbps)
>    4. To ensure a feasible practical implementation based on
>       policy servers and interoperability between service providers
>    Deliverables:
>    1. Specification of protocol that meets the requirements in the
>       form of an Internet-Draft that defines the negotiation of QoS
>       parameters, the measurement process and alert mechanisms.
>    2. Dimensioning rules and performance analysis
>    3. A set of technical requirements for a practical
>       implementation which may include adaptative solutions and/or
>       QoS profile modification.
> Goals and Milestiones
> =====================
> Nov 2010    Submit Internet-Draft as a proposed standard for QoS
>              application-level protocol
>              Proposed charter for Q4S WG
>              Informational document with rules for dimensioning
>              and performance analysis
>              Specification of architecture document for implementation
> - Jose Javier
>
>
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