Re: Label_link

["Kearney" <clausen@cosy.sbg.ac.at>]

----- Original Message -----
From: "Ghassane Aniba" <Ghassane.Aniba@sophia.inria.fr>
To: <ip-dvb@erg.abdn.ac.uk>
Sent: Monday, April 22, 2002 7:41 AM
Subject: Label_link


> harri.hakulinen@nokia.com wrote:
> >
> > Moro, It seems that we are approaching the point...
> >
> > If you put "Label" to TS level, you are really playing
> > the "ATM card", because you now have PID/Label pair in
> > comparison to VPI/VCI pair.
>
> It's not really the same. In the ATM we put many ATN cells in one
> MPEG2-TS packet, but here, we put only one label for each fragment of
> SNDU.
>
Do you put complete 53-byte ATM cells into one TS-packet or do you follow
the strategy which has been proposed some time ago to just take the payload
part of the ATM cell and map the ATM header to a TS header? "many" is either
3 or 4 - or did I understand this wrong?



> > In other words, that label can't really relate to individual
> > SNDU's, because they really are "inside the pipe".
>
> No, they are really outside :
>
> |----------------------------------------------------|
> |       SNDU                           |
> ------------------------------------------------------
>
> we will fragment the SNDU in many 181 octets:
>
> |------------------|-------------|------------------|
> |  MPEG2-TP Header | link_label  |  SNDU fragment   |
> |------------------|-------------|------------------|
>
> > If you want to switch SNDU's, you need to do it based on
> > a field that is inside SNDU...
>
> I'll use PID in the first level, and after we will use
> link_label.(because we can just filter 20 pid simultanously)
>
> >
> > //Harri
>
> Aniba.
>
> --
> Ghassane ANIBA
> INRIA (Projet PLANETE)             | Email :
> ghassane.aniba@sophia.inria.fr
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>