Re: [Marnew] RFC 6077

I don’t think that has to be the case. I’d like to get channel bandwidth, allocated channels vs available channels, and a couple of other things from the tower. Beyond collecting this data to better understand global trends, we use similar (less accurate) signals for making dynamic decisions (for instance, disable a particular feature because conditions look like X).

Just because the signals are ephemeral/dynamic don’t mean they aren’t useful. TCP does not provide these hints. Also struct tcp_info is a Linuxism and is not widely available across platforms.

-Blake

From: Ca By
Date: Thursday, September 24, 2015 at 8:49 AM
To: Blake Matheny
Cc: "Smith, Kevin, (R&D) Vodafone Group", "Scharf, Michael (Michael)", "marnew@iab.org<mailto:marnew@iab.org>"
Subject: Re: [Marnew] RFC 6077

On Thursday, September 24, 2015, Blake Matheny <bmatheny@fb.com<mailto:bmatheny@fb.com>> wrote:
I’ve asked a couple of vendors for congestion hints in a variety of ways. So far, no luck :) I would really like to see this as well.

The problem is these hints are too ephemeral and dynamic to be useful.  Someone turns on a microwave oven and congestion becomes high ....

This just seems to be more signalling without actionable information. I belive tcp already provides these hints

On 9/24/15, 7:34 AM, "Marnew on behalf of Smith, Kevin, (R&D) Vodafone Group" <marnew-bounces@iab.org<javascript:;> on behalf of Kevin.Smith@vodafone.com<javascript:;>> wrote:

>Hi Michael,
>Thanks for reminding me - Bob Briscoe also recommended 6077, especially when considering the impact of providing congestion hints (namely in the Mobile Throughput Guidance draft). Certainly we need to make sure that such efforts do not merely shift the bottleneck to cause problems elsewhere. So as you say we can review those challenges - if not in detail at the workshop then on the mailing list.
>All best
>Kevin
>
>"Scharf, Michael (Michael)" <michael.scharf@alcatel-lucent.com<javascript:;>> wrote:
>
>
>On the MarNew page, I see some ideas related to network-support/network-assisted congestion control. The IRTF has written some time ago RFC 6077, and it could be useful to review the challenges in Section 3.1 therein. Of course, parts of that RFC may be outdated.
>
>Michael (co-author of RFC 6077)
>
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