Subject: [Fwd: Re: [MIPSHOP-MIH-DT] Input for tomorrow]

From: Telemaco Melia <[email-masked]>
Date: Fri, 27 Jul 2007 00:50:30 +0200

NOT digested summary of the issued discussed this afternoon. A better 
format will follow.

tele

Subject: Re: [MIPSHOP-MIH-DT] Input for tomorrow
From: Telemaco Melia <[email-masked]>
To: Telemaco Melia <[email-masked]>
Date: Thu, 26 Jul 2007 23:49:04 +0200

Telemaco Melia wrote:
> Guys,
>
> Please carefully consider the list of issues and let's be constructive 
> during tomorrow's wrap up session.
> Bear in mind that we need to go back home with well identified tasks 
> and fixed deadlines. The chair today was
> very firm on the proposed time line.
>
> Comment asap.
>
> Cheers,
> Tele
>
> Issues list
> ===========
>
> + Transport:
>
> - Discussion with Nada on which scenarios they should 
> consider/simulate. We agreed that TCP +.21 w/o ACK and UDP + .21 ACK 
> are the 2 options to be considered. (This was also discussed with 
> transport area people)
It seems that we need the following: take the base as plain vanilla UDP 
without any mechanism for ACK and congestion. We need to compare with 
TCP and UDP + .21 ACK. It is likely that .21 ACK as specified in the 
draft needs to be modified/updated according to what the transport guys 
want. The list of issues identified today:
-- transport scenarios for IS,CS,ES (RTT between MIH peers)
-- co-located or not co-located services (is there a requirement on the 
transport?)
-- rate (handover related?) and size of message exchange
-- what is the application layer retransmission mechanism including 
timers (.21 ACK)
-- concerns for large information transfer (fragmentation at MIH layer 
or transport, MIH data transmission rate control)
-- implication of the message exchange over congested links
-- queuing of messages with different priority (related to transport)
> - Identified metrics to take a decision are: congestion on the link, 
> latency, TCP over wireless and link diversity, TCP setup time, 
> location of the MoS(RTT)
Fragmentation to be added tot he list of parameters.
> - This input should be given to Nada's team to investigate - Identify 
> possibilities, and eventually to mandate a solution (this point has to 
> be clarified and agreed by all)
The above should serve as input for further analysis. We should 
understand if the scenarios are feasible.

>
> + Discovery
>
> - The assumption is that the scenarios in the slides have to be 
> addressed (agreement on whether we should support discovery of MoS3 
> while @home?)
> - Recommend extensions/options for DHCP and DNS
>     o for DHCP seems reasonable to provide an option for the MIH 
> domain name (port and transport protocol not being options)
>     o for DNS (SRV or NAPTR?) need to specify tag(s) (clarify if we 
> want to distinguish multiple services or not e.g. IS, ES, CS or simple 
> MIH)
We should get to the same information with both methods.
>
>
> Time line
> =========
> It seems appropriate to produce a -00 version in August. The chairs 
> are strongly pushing for it.
9th August deadline  for first contributions.
>
> Structure of the doc
> =====================
> We proposed a first TOC. We need to agree and comment the proposal.
> To make things easier at the beginning I would like to produce a 
> document with all included. We can decide later if we need to split 
> and if yes how.
>
> Admin
> ======
> Schedule AC every 1/2 week. Who can offer a bridge?
> Assign sections during the wrap up session and decide next deadlines.
>
>
>
>
>
>
> _______________________________________________
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> https://www1.ietf.org/mailman/listinfo/mipshop-mih-dt

-- 
Dr. Telemaco Melia			[email-masked]
Senior Research Staff Member		Tel: +49 (0) 6221 4342- 142
NEC Europe Ltd.
NEC Laboratories Europe
Network Division			
Kurfürsten-Anlage 36		
69115 Heidelberg
GERMANY	  

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