Re: Re the encapsulation I-Ds...

[Richard Gibbons <rgibbons@mitre.org>]

The question is a good one. While IP is at layer 3 there is a HDLC
router output that provides Sync Serial IP frames that could directly
interface with a Modem. NASA's Space Network currently uses HDLC as the
underlying satellite transport. ATM is also possible as the basic
underlying satellite transport. The comparision between HDLC, DVB and
ATM for satellite transport is not obvious in spite of the mass produced
DVB IRDs.

Richard Gibbons

Bertrand WENDLING wrote:
> 
> IP is not a transport protocol, MPEG yes, but you are free to use any other
> transport format. The other reason is that millions of receiver are able to
> receive data (video, audio, encapsulated data of various format) in MPEG
> format. Creating a new format would result in having to start from zero
> receiver to launch the service....
> 
> OZGUR.AKSU@startv.com.tr wrote:
> 
> > Hello ,
> >
> > I  have been following you for a long time , I am prepairing a master
> > thesis , but one point I could not understand that why we need to
> > encapsulate IP packets with MPEG format, what are the advantages of doing
> > that ? Is it also possible to transmit data in IP format via satellite , at
> > this time, what types of problems we would encounter ?
> >
> > Thank you.
> >
> > Ozgur  AKSU
> 
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