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Re: [rohc] WG last-call for SigComp User Guide and Torture Tests

Pekka Pessi <Pekka.Pessi@nokia.com> Mon, 22 August 2005 10:22 UTC

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To: Cristian CONSTANTIN <constantin@fokus.fraunhofer.de>
Subject: Re: [rohc] WG last-call for SigComp User Guide and Torture Tests
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From: Pekka Pessi <Pekka.Pessi@nokia.com>
In-Reply-To: <20050819141246.GK23031@terix.fokus.gmd.de> (Cristian CONSTANTIN's message of "Fri, 19 Aug 2005 16:13:46 +0200")
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Cc: "Surtees, Abigail" <abigail.surtees@roke.co.uk>, rohc@ietf.org, "Lars-Erik Jonsson (LU/EAB)" <lars-erik.jonsson@ericsson.com>
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Cristian CONSTANTIN <constantin@fokus.fraunhofer.de> writes:
>> Yes, you're right, the minimum values needed should be stated.  I
>> believe they all run in 16cpb and there is no state storage so 0 SMS is
>> ok.

>cristian: what exactly do you mean by "state storage"? I have seen that all 
>these decompressors make state create requests in their END-MESSAGE; an example 
>from "4.1.1  Simplified LZ77":

>END-MESSAGE (requested_feedback_location,
>   returned_parameters_location, state_length, 64,
>   decompress_sigcomp_message, 6, 0)

To me it looks like all the basic algorithms in section 4 require
TCP (no feedback), 16K of DMS (because udvm memory size is 8192)
and 8K of SMS (as the size of state item created is 8192 - 64).

--Pekka

>> > -----Original Message-----
>> > From: rohc-bounces@ietf.org [mailto:rohc-bounces@ietf.org] On 
>> > Behalf Of Cristian CONSTANTIN
>> > Sent: Friday, August 19, 2005 1:21 PM
>> > To: Lars-Erik Jonsson (LU/EAB)
>> > Cc: rohc@ietf.org
>> > Subject: Re: [rohc] WG last-call for SigComp User Guide and 
>> > Torture Tests


>> > On Thu, Aug 04, 2005 at 03:33:46PM +0200, Lars-Erik Jonsson 
>> > (LU/EAB) wrote:
>> > > ROHCers,

>> > > We have been working on several informational documents to help
>> > > implementers of SigComp. Since some of these have now been stable
>> > > for a long time, and both authors and chairs believe these are
>> > > ready, we are now last-calling the following documents:

>> > >             draft-ietf-rohc-sigcomp-torture-tests-01.txt
>> > >                  (for publication as Informational)

>> > >             draft-ietf-rohc-sigcomp-user-guide-02.txt
>> > >                  (for publication as Informational)

>> > cristian: one single comment related to this draft; namely, 
>> > shouldn't a
>> > minimum acceptable value of the cpb, dms, sms parameters be 
>> > recommended for 
>> > the udvm code specified in "4.  Compression algorithms" ?

>> > bye now!
>> > cristian
>> > -- 
>> >  _          | There are many people who use UNIX or Linux  
>> > (_'_        | who IMHO do not understand UNIX.
>> >   (_'rist   |              --David Korn  
>> > GPG public key at wwwkeys.de.pgp.net

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