[SLS] Review of SLS Area Contents and Goals by 10 July
Gian.Paolo.Calzolari at esa.int
Gian.Paolo.Calzolari at esa.int
Thu Jul 2 13:02:39 UTC 2015
Done!
Thanks.
Gian Paolo
PS I also put together the two SEA bullets that previously had the MOIMS
bullet in between.
From: Moury Gilles <Gilles.Moury at cnes.fr>
To: "Enrico.Vassallo at esa.int" <Enrico.Vassallo at esa.int>,
"Gian.Paolo.Calzolari at esa.int" <Gian.Paolo.Calzolari at esa.int>,
Cc: "sls-bounces at mailman.ccsds.org" <sls-bounces at mailman.ccsds.org>,
"SLS - Space Link Services Area" <sls at mailman.ccsds.org>
Date: 02/07/2015 14:50
Subject: RE: [SLS] Review of SLS Area Contents and Goals by 10
July
Gian-Paolo,
I would simply add in the coordination section :
- with SEA for development, adoption and integration of
security-related recommended standards and practices;
rationale : SDLS is a joint WG with SEA that develops security standards
Regards,
Gilles
Gilles MOURY
CNES Toulouse
De : sls-bounces at mailman.ccsds.org [mailto:sls-bounces at mailman.ccsds.org]
De la part de Enrico.Vassallo at esa.int
Envoyé : jeudi 2 juillet 2015 11:15
À : Gian.Paolo.Calzolari at esa.int
Cc : sls-bounces at mailman.ccsds.org; SLS - Space Link Services Area
Objet : Re: [SLS] Review of SLS Area Contents and Goals by 10 July
No change for RFM goal.
Enrico
From: Gian.Paolo.Calzolari at esa.int
To: "SLS - Space Link Services Area" <sls at mailman.ccsds.org>,
Date: 02/07/2015 10:07
Subject: [SLS] Review of SLS Area Contents and Goals by 10 July
Sent by: sls-bounces at mailman.ccsds.org
Dear All,
CMC and CESG Chair has requested to review the Area contents (Area
content tab) and goals in the CWE on-line strategic plan.
For SLS you can find this information here:
http://cwe.ccsds.org/fm/sp/Lists/SLSContent/AllItems.aspx and at the
bottom of this mil for your convenience.
Keeping in mind that we have six goals (i.e. one per WG), can you please
review the general description of SLS Area and (at least) the goal related
to your WG?
I think the contents below are quite stable and I would expect only minor
changes (if any).
I would appreciate receiving any comment by 10 July 2015.
Thank you all for the collaboration.
Gian Paolo
==================================
SPACE LINK SERVICES AREA
?The objective of the SLS area is to address all of the point-to-point
communications links and protocols that interconnect a spacecraft with its
ground-support system, or with another spacecraft, by developing standards
for efficient and reliable space link communications systems addressing
nominal as well as emergency scenarios. Specific attention is given by SLS
to needs for higher data rates and better link performances, a standard
security mechanism, and lower cost, mass, and power.
SLS area objectives focus on Layers 1 & 2 (of the Open Systems
Interconnection [OSI] protocol stack)?i.e., the Physical Layer and the
Data Link Layer. This means that SLS concentrates in particular on
radio-frequency and optical systems, modulation, synchronization and
channel coding, and data link protocols, for both long-haul (e.g.,
spacecraft-to-ground) and proximity links (e.g., orbiter-to-lander).
Moreover SLS concentrates also on two additional functions essential on
the space link: data compression for end-to-end data transfer
optimization, and ranging for accurate orbit determination.
The SLS area needs to coordinate:
with CSS for the identification of relevant parameters for service
management;
with CSS for the inner behavior (i.e., the implementation aspects and
not the terrestrial interface characteristics) of the CSTS to be made
available to other agencies;
with SEA for Delta-DOR issues;
with MOIMS and CSS if the need of standardized exchange of
meteorological and orbital data will be required for optical
communications;
with SEA for adoption and integration of security-related recommended
standards and practices;
the SANA-recommended practices for registries and repositories.
The strategic goals of the SLS area are presented below.
SLS GOAL 1
?Enable efficient bi-directional transmission for near-Earth
spacecraft (including missions to?and/or orbiting around?the Moon and at
Lagrange points) and deep-space spacecraft (especially Mars missions) by
developing appropriate modulation schemes for telecommand, telemetry, and
ranging signals in the applicable frequency bands while providing narrower
bandwidth and higher data returns.?
SLS GOAL 2
?Produce efficient standards for coding schemes and
synchronization, providing new generations of space missions with
telecommand and telemetry capabilities beyond current technologies, such
that spacecraft interconnection with its ground support system, or with
another spacecraft, can accommodate higher data rates and better link
performances, together with lower cost, mass, and power.?
SLS GOAL 3
?To provide efficient space data link protocols capable of
satisfying the needs of current and future missions; i.e., to produce or
maintain standards to support smoothly higher data rates with seamless
interface to both user applications and communication technologies over
radio frequency (RF) and/or optical links.?
SLS GOAL 4
Develop data compression standards enabling efficient data rates
and volume reduction to maximize the usage of available space links
bandwidth and onboard storage capacity. These internationally agreed data
compression standards will foster interoperability and multi-mission
development of compression functions.?
SLS GOAL 5
?Provide security functions operating at Layers 1 & 2 (of the OSI
protocol stack) of CCSDS space links. The targeted security services
include authentication, integrity check, anti-replay, and confidentiality
both for uplink and downlink. The corresponding security
protocols/functions shall be compatible with CCSDS TM, TC, and AOS data
link protocols and be independent from any specific cryptographic
algorithm. Develop associated management functions for monitoring and
control, key and security association management. Security at Physical
Layer level should also be considered.?
SLS GOAL 6
?Establish a common framework of standardized services for space
optical communications for interoperability and cross support by creating
new standards for optical links (ISO Layers 1 & 2), taking into account
the uniqueness of these types of links, such as very high data rates,
geographic station diversity, and atmosphere (?weather?) influences.
Consider also the services to be offered/required to/by space data link
protocols and relevant procedures. Finally, identify the needed
coordination with other CCSDS areas.?
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