[Sois-wir] CCSDS: Agreement between SOIS Wireless and SLSPlacom working groups

[Yuriy Sheynin]

Dear colleagues,

Exactly, the  definition of "proximity" is crucial for reasoning about the wireless interconnections.

And for me it has twofold point of view to the proximity: 
1) from the point of view of applications; the discussion looks to go mainly this way; 
2) from the point of view of the technology.
As the CCSDS more adapt existing technologies than developing original ones, the second point of view is important also when we discuss a range of wireless technology.
For instance, for me the WiFi area for high-rate links or ZigBee for low-rate define what is proximate and what is not. And a a rover traversing several kilometers is definitely out of the range of this proximity.
WiFi/ZigBee area is quite enough for most onboard networking and to overload onboard networking with technologies for 10 km doesn’t look reasonable.
May be we need to define a proximity scale keeping in mind both applications and available technology in its definition.  

Kind regards,

Yuriy 
---------------------

Yuriy Sheynin
Professor, Doctor of Science
Head of the Chair of Aerospace Computer and Software Systems 
Director of the Institute for High-Performance Computer and Network Technologies
St. Petersburg State University of Aerospace Instrumentation
           67, Bolshaya Morskaya st.
           190 000, St. Petersburg
           RUSSIA
           Phone/Fax: +7 812 710 6234;
           E-mail: sheynin at aanet.ru



From: Kevin K Gifford 
Sent: Wednesday, October 22, 2014 6:36 PM
To: Jean-Francois.Dufour at esa.int ; sois-wir at mailman.ccsds.org ; chris.taylor at esa.int 
Subject: Re: [Sois-wir] CCSDS: Agreement between SOIS Wireless and SLSPlacom working groups

Chris - 

Thank you very much for your assistance in this regard.  The CESG clarification is timely and needed.

I have one observation which might become relevant.  Regarding the agreement for SOIS that:

   "SOIS Responsibilities include: A) networked multi-point links utilising commercial wireless network technologies for Communications onboard a space vehicle or habitat and/or surface links within the proximity of that vehicle or habitat"

There may be some debate over the exact definition of "proximity", e.g., how far from a planetary wireless infrastructure point.  I'm thinking of the "golden scenario" of a rover traversing several kilometers from a planetary surface infrastructure point.  I think (stating my view, not committing anyone else) that planetary surface communication networks and infrastructure (e.g., surface communications networks) are the domain of SOIS and anything space-to-ground is SLS.

The argument that I would like to avoid is: "Well, the rover is X km from the habitat so the communications link is the responsibility of SLS, even though the communications are all over the ground network."  

I'm probably being somewhat anal, but we've gone round-and-round with Jean-Luc Gerner in this regard previously.  I guess we can cross this bridge if/when we come to it.

Thanks again Chris, very much appreciated.

Kevin 

From: "Jean-Francois.Dufour at esa.int" <Jean-Francois.Dufour at esa.int>
Date: Wednesday, October 22, 2014 6:36 AM
To: "sois-wir at mailman.ccsds.org" <sois-wir at mailman.ccsds.org>
Subject: [Sois-wir] CCSDS: Agreement between SOIS Wireless and SLS Placom working groups


Dear Colleagues, 

Please take note of the agreement below between CCSDS SOIS-Wireless and the PLACOM group.

Regards, 

Jean-Francois Dufour 
Chairman of the CCSDS SOIS Wireless Working Group



----- Forwarded by Chris Taylor/estec/ESA on 22/10/2014 14:19 -----

From:        Gian.Paolo.Calzolari at esa.int
To:        "CCSDS CESG --" <cesg at mailman.ccsds.org>, 
Date:        21/10/2014 18:01
Subject:        [CESG] Nuntio Vobis Gaudium Magnum (from SOIS and SLS)
Sent by:        cesg-bounces at mailman.ccsds.org

--------------------------------------------------------------------------------



Dear All, 
       I would like to inform you that, with respect to the overlap issue discussed in the CESG, today SOIS and SLS Area have agreed today the following split of responsibilities:

__________________ 
SLS Responsibilities include:
1) point-to-point links for Planetary Communications
2) multi-point links for Planetary Communications utilising CCSDS data link and physical layer protocols
3) consideration of usage of Radio Frequency bands over space-ground and space-space links 

SLS can therefore define mission scenarios/profiles for Planetary Communications, as well as functional & performance requirements and develop the pertinent Standards (Magenta or Blue Books) according to the points 1..3 listed above.

SOIS Responsibilities include:
A) networked multi-point links utilising commercial wireless network technologies for Communications onboard a space vehicle or habitat and/or surface links within the proximity of that vehicle or habitat.
B) cooperation with the SLS Area for matters related to usage of Radio Frequency bands 

SOIS can therefore define mission scenarios/profiles for Vehicle and vicinity Communications, as well as functional & performance requirements and develop the pertinent Standards (Magenta or Blue Books) according to the points  A..B listed above.

Charters and CWE Projects of the affected WGs in SLS and SOIS Areas are to be made consistent with the above set of responsibilities (if not consistent now).
__________________ 

Best regards to you all and my particular thanks to Chris and Gilles for the pro active collaboration.


Gian Paolo 

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