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Re: Discussion on IP over DVB-S2 -




I think DVB-S2 is a topic which seems related to the work of the ipdvb WG, and that there is probably sufficient expertise within this WG to discuss this (I've seen several responses already).

I'd encourage three things:

(i) This is an IETF mailing list - all contributions must adhere to the IETF copyright rules, please do not introduce things that include IPR, unless you notify the IETF of this.

(ii) This topic does not address a current Charter item of the ipdvb Working Group. The discussion of the topic on the list does NOT imply the willingness of the IETF to standardise a new method. This is an IESG decision, that would require prior publication of an Internet Draft, and much discussion.

(iii) I think we need to start with a requirement for what needs to be done, this would be useful to many in this WG. The normal way to contribute such documents is again, by publishing of an Internet-Draft on the topic. I do encourage you to do this.

Best wishes,

Gorry
(ipdvb WG Chair)

P.S. I am also interested in this topic.

Jérôme Lacan wrote:

Dear all,

With our colleagues from Alcatel-Space, we are working on the mapping of IP
over DVB-S2.

Recall that DVB-S2 is the "second generation" DVB system for broadband
satellite service. It will probably replace DVB-S in the next few years.
You
can find the specifications in ETSI document - EN 302 307.

One of the main business targets of DVB-S2 is IP packet transmission. The
mapping/encapsulation of IP over this system remains an open research issue.
Actually, DVB-S2 proposes 2 modes to transport the data. The first one,
Transport Stream-TS, is designed to transport MPEG2-TS packets whereas the
second one, Generic Stream-GS, is designed to transport continuous streams
(which can be compound of variable size packets). Regardless of the chosen
mode, the resulting data are then mapped on Data Fields (of length varying
from 16008 to 58192 bits) to be encoded by the FEC (LDPC + BCH).

Several options can be considered for this mapping. We think that the ipdvb
group is a good place to start a discussion on this subject.
If you are interested on this subject, could you please manifest your
interest?

best regards,

Jerome Lacan
ENSICA/TeSA/LAAS-CNRS
Toulouse, France