Re: Efficacy of rule specification, processing

Markus,

Thank you very much for the response.
It was really useful in clearing up a lot of things.
I will be delighted to provide some streaming
media related examples. I will submit them soon.

Thank you,
Jayanth


Markus Hofmann wrote:

> Jayanth,
>
> > I would like to restate that the example quoted was ONE illustration of a
> > bigger concept - that supporting dynamic rule injection will probably be
> > very important to support if you truly intend to support long running media
> > rich sessions (which is what most RTP sessions are), in heterogenous
> > networking/device  environments.
> The question is whether OPES will be in the data path of such long
> running sessions. I could also imagine that OPES is only in the
> control (i.e. the request) path, for example redirecting users to
> servers that run the adaptation services. In this case, the OPES
> device might not even sit in the data path of the long running
> session.
>
> Example: User sends HTTP request for a SMIL file, passing through the
> OPES device. When the SMIL file comes back, there are (static) rules
> configured in the OPES device that trigger forwarding of the SMIL file
> to a callout server (for example, could be done in iCAP Resp Mode).
> The callout server re-writes the embedded links (for audio/video
> streams) in the SMIL file to point to adaptation servers instead of to
> the origin server. Modified SMIL file is delivered to user. User now
> requests audio/video streams from the adaptation server (without
> necessarily going through the OPES device; or in pass-through mode of
> the OPES device). Dynamic adaptation can now be done at the adaptation
> server, no need for dynamic rules in the OPES device (because it's
> basically off the data path).
>
> > Could someone give me an example of the sorts of services you thought OPES
> > could provide for streaming media (RTP) sessions?
> We probably have to add those to the scenario/example document. It
> looks like you already have a couple in mind. Would be great if you
> could help us in adding those to the draft.
>
> -Markus