RE: [rohc] ROHC-FN and TCP Profile - Version 2

[Yousuf.Saifullah@nokia.com]

Hi Richard,
I think it would be useful to have the pictorial format generation. 

Thanks,
Yousuf

-----Original Message-----
From: ext Price, Richard [mailto:richard.price@roke.co.uk]
Sent: Tuesday, April 29, 2003 9:51 AM
To: Saifullah Yousuf (NRC/Dallas); rohc@ietf.org
Subject: RE: [rohc] ROHC-FN and TCP Profile - Version 2


Hi Yousuf,

Drawing the Version 2 packet formats out pictorially might
be a bit of a challenge, as they're a *lot* more complex
than the Version 1 formats. They're now roughly as
complicated as the packet formats in RFC 3095, so the
pictorial form plus accompanying text will be around 100
pages long  - a non-trivial amount of effort to generate
by hand ;-)

A possible solution would be to modify our implementation
so that it can automatically convert a ROHC-FN description
of the packet formats into a pictorial one. If you think
this feature would be useful, let me know so that we can
add it to the next version of the implementation.

Regards,

Richard

> -----Original Message-----
> From: Yousuf.Saifullah@nokia.com [mailto:Yousuf.Saifullah@nokia.com]
> Sent: Friday, April 25, 2003 6:07 PM
> To: Price, Richard; rohc@ietf.org
> Subject: RE: [rohc] ROHC-FN and TCP Profile - Version 2
> 
> 
> Hi Richard,
> Could you please share the version 2 for the TCP compression 
> profile in the pictorial form with textual description 
> (basically, in the I-D format). Something similar you did for 
> the previous version.
> 
> Thanks,
> Yousuf
> 
> -----Original Message-----
> From: ext Price, Richard [mailto:richard.price@roke.co.uk]
> Sent: Wednesday, April 23, 2003 6:49 AM
> To: 'rohc@ietf.org'
> Subject: [rohc] ROHC-FN and TCP Profile - Version 2
> 
> 
> Hi,
> 
> Now that Easter's out of the way, it might be a good
> time to restart the discussion on ROHC-FN and the TCP
> compression profile. In the interests of getting the
> discussion going, here's a link to Version 2 of our
> implementation:
> 
> http://sigcomp.srmr.co.uk/~rjp/ROHC-FN_Version_2.zip
> 
> For the updated implementation we've added all of the
> encoding methods not supported in Version 1, including
> Huffman-based discriminator encoding (i.e. EPIC-lite)
> as well as "list" encoding for the TCP options and
> the IP extension headers. We've also added support for
> real IR packets with the correct indicator bits.
> 
> The TCP packet formats have been updated to take
> advantage of the new encoding methods - we can now
> compress various TCP options using list encoding, and
> have a single discriminator for the header as a whole.
> Minimum compressed header size is now 3 bytes.
> 
> One other issue - the updated implementation is
> written in a different language from the original
> (namely Prolog rather than Haskell). We're still
> working on the Haskell code, but we're turning it into
> a "proper" implementation (with full debugging and a
> nice user interface).
> 
> A suitable Prolog interpreter can be downloaded from:
> 
> http://www.swi-prolog.org/download.html
> 
> For simplicity, the implementation is provided as a
> single Prolog source file. Just open it and type
> "comp_list(tcp_test_n)." where n is the TCP test flow
> to be compressed.
> 
> Regards,
> 
> Richard
> _______________________________________________
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> 
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