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Re: [CCAMP] Benjamin Kaduk's Discuss on draft-ietf-ccamp-mw-yang-10: (with DISCUSS and COMMENT)

Benjamin Kaduk <kaduk@mit.edu> Wed, 07 November 2018 08:58 UTC

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Date: Wed, 07 Nov 2018 02:58:00 -0600
From: Benjamin Kaduk <kaduk@mit.edu>
To: Jonas Ahlberg <jonas.ahlberg@ericsson.com>
Cc: The IESG <iesg@ietf.org>, "ccamp-chairs@ietf.org" <ccamp-chairs@ietf.org>, "ccamp@ietf.org" <ccamp@ietf.org>, "draft-ietf-ccamp-mw-yang@ietf.org" <draft-ietf-ccamp-mw-yang@ietf.org>
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Subject: Re: [CCAMP] Benjamin Kaduk's Discuss on draft-ietf-ccamp-mw-yang-10: (with DISCUSS and COMMENT)
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On Tue, Nov 06, 2018 at 10:09:29AM +0000, Jonas Ahlberg wrote:
> Hi Benjamin,
> 
> Sending an update of the comment about the ranges.
> 
> > , but I am not really an expert in this area.ow was the range of -99 to 99 dBm for the maximum-nominal-power/actual-transmitted-level/etc. nodes selected?
> > Similarly, is there a physical limit that makes -20dBm the cap for 
> > actual-received-level?  Even if I have an unrealistic situation of the antennas separated by just a meter or two?  (Other nodes, e.g., max-rltm, may have similar questions posed, too.) [JonasA] We will check this in more detail and come back with a clarification and/or update of the ranges specified.
> >
> The systems of today are not built for input levels above -20 and would typically need external attenuators in cases where that limit is exceeded. The evolution is not expected to change that situation. Instead the systems will evolve to support lower and lower input levels going forward.
> Therefore, we have decided to keep the current range for received levels as -99..-20. On the other hand, we have decided to change the associated thresholds to use that same range instead of the current range of -99..-30.

Thanksfor the extra clarifications; I appreciate hearing about the expected
evolution.

-Benjamin

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