[Sls-rfm] Fw: SOIS-WIR Wireless Proximity Network Communications draft Blue Book - addendum - ESA position
Enrico.Vassallo at esa.int
Enrico.Vassallo at esa.int
Fri Nov 20 13:15:29 UTC 2020
Dear All,
having checked with my colleagues, I am in a position to report the ESA
position:
ESA prefers a GB to an OB and is in any case against this book being a BB
as it stands now.
Concerning the GB, it is necessary to check potential overlaps with the
existing "Wireless network communications overview or space mission
operations" green book (CCSDS 880.0-G-3).
Please all agencies reply by the deadline.
Regards, Enrico
From: Enrico Vassallo/esoc/ESA
To: sls-rfm at mailman.ccsds.org
Date: 18/11/20 16:18
Subject: Re: Fw: SOIS-WIR Wireless Proximity Network Communications
draft Blue Book - addendum
As per SLS AD suggestion, please also consider question 3
3) You agree that the book should be a green book
Regards, Enrico
From: Enrico Vassallo/esoc/ESA
To: sls-rfm at mailman.ccsds.org
Date: 18/11/20 15:19
Subject: Re: Fw: SOIS-WIR Wireless Proximity Network Communications
draft Blue Book
Dear All,
I have received the attached comments by Wai. I assume that the comments
raised by Dennis, Jean-Luc and me in cooperation with SFCG Lunar Martian
Spectrum Group chairperson are addressed so the only remaining items are
those identified by Wai.
I would like to know if:
1) You endorse Wai's comments
2) You agree that the book should be an orange book
Please reply to these two questions by Nov 22.
Note that in their response, SOIS-WIR are of the opinion that any
remaining comments shall be addressed during agency review. However, given
the time it takes to start such process, I think we can still interact.
The problem is that SOIS and SOIS-WIR are not going to like these
suggestions. Additionally, SOIS AD is from NASA (GSFC) and SOIS-WIR
chairman is from University of Colorado while I am ESA as well as the SLS
AD.
If the WG agrees with items 1 and 2, I would suggest SOIS AD to get in
touch with Wai as the RFM WG liaison being both at GSFC.
Looking forward to your views,
Enrico
----- Forwarded by Enrico Vassallo/esoc/ESA on 18/11/20 15:03 -----
From: "Fong, Wai H. (GSFC-5670)" <wai.h.fong at nasa.gov>
To: "Enrico Vassallo" <Enrico.Vassallo at esa.int>
Cc: "Lee, Wing-tsz (GSFC-5670)" <wing-tsz.lee-1 at nasa.gov>, "Rodriguez,
Shannon (GSFC-5670)" <shannon.rodriguez-1 at nasa.gov>, "Sank, Victor J.
(GSFC-567.0)[SCIENCE SYSTEMS AND APPLICATIONS INC]"
<victor.j.sank at nasa.gov>
Date: 18/11/20 14:39
Subject: CCSDS 883-0-BBv1-0 response
Enrico,
My focus are the statements in response to my comments to CCSDS 883.0-B-0
starting in page 2-1 in the Executive Summary section 2-1.
Comments:
1. Overall observation to this new passage in the executive summary:
Most of the items listed are general background material and not specific
to the application of the protocol to a planetary or lunar surface. It’s
odd that this information is contained in the executive summary section
which is supposed to be summary of the entire document. We will suggest
below items that should put in a background or introductory section.
2. Page 2-2, item 1): This point is more background information and
should be in an introduction.
3. Page 2-2, item 2): “Channel models depend on environment and
deployment architecture (see [36], [D23], [D24], [D25]).” Again while this
statement is true, it is very general and more background information that
should be in an introduction section, not a summary.
4. Page 2-2, item 2): “LTE frame structure and timing inter-symbol
interference (ISI) protection scales to multipath environments compatible
with ~100 km link distances in mountainous terrains on Earth and will
easily address most reasonable planetary, lunar, and other complex surface
topography deployments.” Where is the supporting documentation to this
assertion?
5. Page 2-2, item 2): “Delay spread significantly below 1/15 ms has
no impact on LTE symbol decoding. This supports a path-spread of 10 km for
received multipath components. Channel models are studied in depth in
IEEE, 3GPP, and ITU processes, easily supporting the relatively small
networks envisioned for spaceflight networks.” Delay spread is a function
of the channel, and RF frequency. If you have a Lunar channel with
reflection coefficients, carrier frequencies and Doppler that are
different from the terrestrial coefficients, then that impacts the delay
and Doppler spread which could make the total time spread be much longer
and this would impact the architecture of the network. A detailed study
of the Lunar or planetary surface is required to make a detailed multipath
model in order to make a good protocol. We don’t see a reference or
detailed study of the Lunar surface. The closest reference is [D25],
however this article deals with intra-crater communications which is not
likely to be a location for a lunar base.
6. Page 2-2, item 2): “For additional technical background see
Wireless Network Communications Overview for Space Mission Operations
(reference [D1]).” This reference gives some fundamental description of
multipath but it doesn’t apply the information to a proposed Lunar or
planetary network. Can you provide a reference that actually applies the
theory to a planetary application?
7. Page 2-2, item 3): This point is more background or introduction
information and should not be in a summary section.
8. Page 2-3, item 4): This point is more background or introduction
information and should not be in a summary section.
9. Page 2-3, item 5): This item is also background or introductory
information.
My general comment is that this new section starting at page 2-1 does not
address my original three comments which I repeat for reference:
1. Although document has a lot of information of the proposed
standards, we don’t see requirements that specific to Lunar environment,
i.e. recommendation for locating base stations and what is the density of
base stations for a required communications utilization.
2. The channel model is not referenced or specified in the document.
We would like to see a characterization of the RF environment so that the
protocols are justified. The protocols are designed for an Earth like
environment so some justification of why this will work on the Lunar
surface in necessary.
a. How does the multipath effects of the lunar surface affect the
throughput of the links?
b. Are there outages created by crater or surface shadowing?
c. Is the multipath frequency selective or flat? How does this
affect the service quality?
3. If there are supporting documents to the protocols for Lunar
applications, please list. The reference document list does not have
this. Only terrestrial applications are specified for 3GPP.
As a suggestion, if the SOIS-WIR wishes to publish this document, I would
suggest an Orange Book or as others have suggested a Green Book. A Blue
Book has to have strong simulation and/or analytical results to support a
CCSDS protocol. And results must be confirmed by two agencies. I don’t
believe this standard has been met given the comments above and a general
lack of solid documented experimental evidence.
Wai Fong, Ph.D.
Communications Engineer
Flight Microwave and Telecommunications Systems Branch
NASA Goddard Space Flight Center
Code 567
Greenbelt, MD 20771
From: Enrico Vassallo/esoc/ESA
To: sls-rfm at mailman.ccsds.org
Date: 16/11/20 10:34
Subject: Re: Fw: SOIS-WIR Wireless Proximity Network Communications
draft Blue Book
Dear All,
I have not received any feedback from you. Meanwhile, I read the changes
myself and therefore have a pretty good understanding of them.
If I do not receive any negative feedback by Nov 18 close of business, I
would assume that the RFM WG can live with the document as proposed now
and will inform SOIS-WIR accordingly. Of course, if you are party to the
Agency Review process also for SOIS area, you may submit your own comments
during such phase (not started yet.)
Regards, Enrico
From: Enrico Vassallo/esoc/ESA
To: sls-rfm at mailman.ccsds.org
Date: 11/11/20 11:02
Subject: Fw: SOIS-WIR Wireless Proximity Network Communications
draft Blue Book
Dear All,
I assume you have not received this email since Kevin is not a member of
the RFM WG. Having checked with the SLS AD, it is confirmed that the email
was blocked by CCSDS.
Please have a look at the response and let me know if you are happy with
it (especially, Dennis, Jean-Luc and Wai who provided specific comments).
Note that the SOIS-WIR chair proposes to address additional comments by
RFM WG during the agency review phase.
Best Regards, Enrico
----- Forwarded by Enrico Vassallo/esoc/ESA on 11/11/20 10:57 -----
From: "Kevin K Gifford" <kevin.gifford at colorado.edu>
To: "Enrico.Vassallo at esa.int" <Enrico.Vassallo at esa.int>,
"sls-rfm at mailman.ccsds.org" <sls-rfm at mailman.ccsds.org>
Cc: "Jonathan Wilmot" <jonathan.j.wilmot at nasa.gov>, "Ray Wagner"
<raymond.s.wagner at nasa.gov>, "Lansdowne, Chatwin (JSC-EV811)"
<chatwin.lansdowne-1 at nasa.gov>, "Cascarano, Brian (ASC/CSA)"
<brian.cascarano at canada.ca>, "Stephen Braham" <stephen_braham at sfu.ca>,
"Siddhartha Subray" <Siddhartha.Subray at Colorado.EDU>, "Kevin K Gifford"
<kevin.gifford at colorado.edu>
Date: 09/11/20 23:11
Subject: Re: SOIS-WIR Wireless Proximity Network Communications
draft Blue Book
Dear SLS-RFM Working Group -
Sincere thanks to the SLS-RFM WG for review of the draft CCSDS 883-0-B-0
Wireless Proximity Network Communications Blue Book.
The SOIS-WIR WG has reviewed all the SLS-RFM comments and have composed
dispositions for all comments.
Please find attached two documents:
-- A table-based response to all SLS-RFM comments (v0.10.06.00 SLS-RFM RID
Table and Responses.docx)
-- The draft BB with the SOIS-WIR proposed updates that address all
comments from SLS-RFM (v0.10.16.16.09 CCSDS 883-0-BBv1-0 Wireless
Proximity Network Communications.docx)
The attached Blue Book has Track Changes ON, and the only changes in the
document are the updates from the SOIS-WIR WG to address/disposition the
SLS-RFM WG Review Items. You can simply advance to the changes in the
Blue Book with the 'Next Change' button where Reviewing.
The primary updates are on page 2-1 and page 2-2, then in Section 2.4.2
starting on page 2-10 and page 2-11 (this includes the updated Table 2-3).
Thank you again for the thoughtful review and suggestions. If there are
any additional inputs from your Working Group, the SOIS-WIR WG will
address/disposition during the nominal Agency Review Cycle.
Please let me know if any questions or concerns.
Thanks again SLS-RFM!
Kevin
From: Enrico.Vassallo at esa.int <Enrico.Vassallo at esa.int>
Sent: Wednesday, October 28, 2020 7:51 AM
To: Kevin K Gifford <kevin.gifford at colorado.edu>
Cc: Jonathan Wilmot <jonathan.j.wilmot at nasa.gov>; Ray Wagner
<raymond.s.wagner at nasa.gov>; sls-rfm at mailman.ccsds.org
<sls-rfm at mailman.ccsds.org>
Subject: SOIS-WIR Wireless Proximity Network Communications draft Blue
Book
Dear Kevin,
RFM WG has concluded discussions on the SOIS-WIR proxy draft BB. The
agreed RFM WG position for SOIS-WIR is attached and is identical to the
draft version submitted by Dennis for advance info.
The RFM WG is looking forward to receiving SOIS-WIR replies and, if
requested by your group, is ready to be actively involved in solving some
of he identified problems.
Best Regards, Enrico
From: "Lee, Dennis K (US 332G)" <dennis.k.lee at jpl.nasa.gov>
To: "Kevin K Gifford" <kevin.gifford at colorado.edu>,
"Enrico.Vassallo at esa.int" <Enrico.Vassallo at esa.int>
Cc: "Jonathan Wilmot" <jonathan.j.wilmot at nasa.gov>, "Ray Wagner"
<raymond.s.wagner at nasa.gov>
Date: 26/10/20 15:20
Subject: RE: RFM Working Group Agenda
[attachment "Response to SOIS-WIR on CCSDS 883.0-BBv1_draft3.docx" deleted
by Enrico Vassallo/esoc/ESA]
Kevin,
Attached is a compilation of the review feedback received from the RFM
working group on the draft SOIS-WIR Wireless Proximity Network
Communication Blue Book. They are mainly focused on revisions to the
spectrum utilization (section 2.4.2), Table 2-2, and information regarding
lunar base station density and lunar surface channel models. Please let
us know if you have any questions about the RFM feedback.
Thanks,
Dennis
From: Kevin K Gifford <kevin.gifford at colorado.edu>
Sent: Tuesday, October 20, 2020 9:00 AM
To: Enrico.Vassallo at esa.int; Lee, Dennis K (US 332G)
<dennis.k.lee at jpl.nasa.gov>
Cc: Jonathan Wilmot <jonathan.j.wilmot at nasa.gov>; Ray Wagner
<raymond.s.wagner at nasa.gov>; sls-rfm at mailman.ccsds.org; Kevin K Gifford
<kevin.gifford at colorado.edu>
Subject: [EXTERNAL] Re: RFM Working Group Agenda
Hi SLS-RFM, Dennis, Enrico -
@Dennis: Can you please forward the SLS-RFM comments pertaining to the
SOIS-WIR Wireless Proximity Network Communications draft Blue Book? The
SOIS-WIR WG would like to review the SLS-RFM comments.
Sincere thanks for your review efforts and valued inputs.
Kevin
From: Enrico.Vassallo at esa.int <Enrico.Vassallo at esa.int>
Sent: Tuesday, October 20, 2020 8:18 AM
To: Kevin K Gifford <kevin.gifford at colorado.edu>
Cc: Jonathan Wilmot <jonathan.j.wilmot at nasa.gov>; Ray Wagner <
raymond.s.wagner at nasa.gov>; sls-rfm at mailman.ccsds.org <
sls-rfm at mailman.ccsds.org>
Subject: RFM Working Group Agenda
Hi Kevin,
we are fine and hope the same is true for you.
The RFM WG works with papers submitted two weeks in advance of the meeting
like other SLS groups. In light of the remote meeting for Fall 2020, we
did documents review by correspondence. The agenda does not entail a
physical mtg or videoconf, but just that we work on these issues.
The WG did review your input and Dennis was about to contact you with our
findings/recommendations.
So please refrain from sending us another version. Have first a look at
our recommendations and let us know what you think and what you could do
about them. We can still iterate our recommendations with your group,
though. If you are willing to take on board our requests, we can give you
a few weeks to carry it out.
Regards, Enrico
From: "Kevin K Gifford" <kevin.gifford at colorado.edu>
To: "Enrico.Vassallo at esa.int" <Enrico.Vassallo at esa.int>,
"Blackwood, Michael D. via CESG-All" <cesg-all at mailman.ccsds.org>
Cc: "Ray Wagner" <raymond.s.wagner at nasa.gov>, "Jonathan Wilmot" <
jonathan.j.wilmot at nasa.gov>, "Kevin K Gifford" <kevin.gifford at colorado.edu
>
Date: 20/10/20 16:05
Subject: Re: [Cesg-all] RFM Working Group Agenda
Hi Enrico -
I hope all is well for you and that you and your family are healthy!
I'll send the SOIS-WIR draft Blue Book to you and the SLS-RFM group later
this week so that you will have the latest version of the document that
will go through Secretariat publication processing.
Please let me know if any questions or concerns.
Thanks.
Kevin
From: CESG-All <cesg-all-bounces at mailman.ccsds.org> on behalf of
Enrico.Vassallo at esa.int <Enrico.Vassallo at esa.int>
Sent: Tuesday, October 20, 2020 7:34 AM
To: Blackwood, Michael D. via CESG-All <cesg-all at mailman.ccsds.org>
Subject: [Cesg-all] RFM Working Group Agenda
Dear Michael,
the agenda follows.
Best Regards, Enrico
1. Modulations for high rate uplinks with ranging at 22 GHz
2. Disposition RIDs concerning CCSDS 401.0-RP-30.1
3. Update to Draft 23/27 GHz TTFR Recommendation
4. Update to Draft Flexible Turnaround Ratio Recommendation
5. Consideration of HOMs for non-EESS missions
6. Review of Draft Wireless Proximity Network Blue Book (SOIS-WIR)
7. Impact of VCM to EESS HOMs recommendations
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[attachment "v0.10.16.16.09 CCSDS 883-0-BBv1-0 Wireless Proximity Network
Communications.docx" deleted by Enrico Vassallo/esoc/ESA] [attachment
"v0.10.06.00 SLS-RFM RID Table and Responses.docx" deleted by Enrico
Vassallo/esoc/ESA]
This message is intended only for the recipient(s) named above. It may contain proprietary information and/or
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