[SLS-CC] Joint CCSDS C&S and SLP WG telecon

Wed Sep 15 08:38:00 UTC 2021

Dear colleagues,
 I hope this finds you well.

In liaison with the SLS-SLP WG chairs, we decided to organise a joint 
session telco on 30th September with details as below (at 16.00-17.30 CET) 
regarding the following two topics:

  1 To ensure both of our WGs are in sync with respect to the SLE Return 
Link Service PIDs are respective WGs have submitted
  2.  How are Variable Length Frames (VLFs) on the Space to Ground Link 
intended to work given the current set of  channel codes defined for them 
in TM Sync & CC (131.0-B)

This meeting is due to the fact that recently, at CESG pool, the following 
Blue Books  (done by CSS-CSTS)  were sent for publication:
-911.2 - SLE-RAF
-911.1 - SLE-RCF
-911.5- SLE-ROCF
-912.1 - SLE- FCLTU
-912.3 - SLE-FSP

The SLS AD identified that the documents had a number of technical 
discrepancies, in particular concerning the adoption of TC channel coding 
for Space-to-Earth, and variable-length frames.
For this reason the documents were Disapproved, and a cooperation with 
SLS-SLP and C&S was recommended. Additionally, PID/RID were sent to the 
CSS-CSTS.

In view of the meeting, you can find in attachment the Blue Books files, 
while the list of PID/RID can be found at https://tinyurl.com/crwyuyak 

Please feel free to reach me or Ken in case you need additional 
clarification

Regards

ESA - European Space Agency
Ph.D. Andrea Modenini
TT&C Communications Systems Engineer 
TT&C and PDT Systems & Techniques Section (TEC-EST)
RF Systems Division
ESTEC
Keplerlaan 1, PO Box 299
NL-2200 AG Noordwijk, The Netherlands
andrea.modenini at esa.int | www.esa.int
T +31 71 56 53439, M +31 6 484 56 527
----- Forwarded by Andrea Modenini/estec/ESA on 15-09-21 09:49 -----

Joint CCSDS C&S and SLP WG telecon

Thu 30-09-2021 16:00 - 17:30

Attendance isfor Andrea Modenini

Chair:
sls-cc at mailman.ccsds.org

Sent by:
"SLS-CC" <sls-cc-bounces at mailman.ccsds.org>

Location:
WebEx; 
https://jpl.webex.com/jpl/j.php?MTID=m0998a8bb483857106352924f57f576c9

Required:
sls-slp at mailman.ccsds.org, sls-cc at mailman.ccsds.org
Time zones:
This entry was created in a different time zone.  The time in that time 
zone is: Thu 30-09-2021 7:00 PDT8:30 PDT

Meeting: Joint CCSDS C&S WG and SLP WG Telecon in preparation for the 
Fall CCSDS Meetings in October 2021

Topics:

  1.  To ensure both of our WGs are in sync with respect to the SLE Return 
Link Service PIDs are respective WGs have submitted
  2.  How are Variable Length Frames (VLFs) on the Space to Ground Link 
intended to work given the current set of  channel codes defined for them 
in TM Sync & CC (131.0-B)

Background:

Several of us are participating in the review of the followingl SLE blue 
books (SLE RAF, SLE RCF, SLE ROCF, SLE FCLTU, SLE FSP). We have found 
several discrepancies in these documents and want to ensure that our WGs 
are on the same page with respect to our inputs to the CSTS WG.

A separate issue which seems to be mixed into the review of these return 
SLE documents is the issue of the appropriate use of variable length 
frames (VLFs) on the return link. The SLP WG asserts that the TM Sync 
& CC blue book Chapter 8 (LDPC Slicing) already provides the option to 
slice fixed or variable length transfer frames on the space to ground 
link. Perhaps it would make sense to explicitly state that both fixed and 
variable length USLP frames are supported by this approach in that 131.0 
document. We believe currently the text in Chapter 8 implies this is a 
true statement for variable length frames as well. We would like to 
discuss the options available with the C&S WG.

Also note that on the Proximity link, variable length prox-1 transfer 
frames are currently being sliced on the return proximity link per the 
Prox-1 C&S blue book (211.2).

Best regards,

Greg Kazz & Matt Cosby
CCSDS SLS WG

-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-
-- Do not delete or change any of the following text. --

When it's time, join your Webex meeting here.

Join meeting<
https://jpl.webex.com/jpl/j.php?MTID=m0998a8bb483857106352924f57f576c9>

More ways to join:

Join from the meeting link
https://jpl.webex.com/jpl/j.php?MTID=m0998a8bb483857106352924f57f576c9

Join by meeting number
Meeting number (access code): 2763 538 3952
Meeting password: 62jyQvmGqZ3

Join by phone
+1-510-210-8882 USA Toll
Global call-in numbers<
https://jpl.webex.com/jpl/globalcallin.php?MTID=m23c954c497c52dee254fba05944b1819
>

Join from a video system or application
Dial 27635383952 at jpl.webex.com<sip:27635383952 at jpl.webex.com>
You can also dial 207.182.190.20 and enter your meeting number.

If you are a host, click here<
https://jpl.webex.com/jpl/j.php?MTID=mee2935655b674ab336336d8d8182579b> to 
view host information.

Need help? Go to https://help.webex.com - 

This message is intended only for the recipient(s) named above. It may contain proprietary information and/or
protected content. Any unauthorised disclosure, use, retention or dissemination is prohibited. If you have received
this e-mail in error, please notify the sender immediately. ESA applies appropriate organisational measures to protect
personal data, in case of data privacy queries, please contact the ESA Data Protection Officer (dpo at esa.int).

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.ccsds.org/pipermail/sls-cc/attachments/20210915/63d257a3/attachment-0001.htm>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: image/gif
Size: 1541 bytes
Desc: not available
URL: <http://mailman.ccsds.org/pipermail/sls-cc/attachments/20210915/63d257a3/attachment-0002.gif>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: image/gif
Size: 239 bytes
Desc: not available
URL: <http://mailman.ccsds.org/pipermail/sls-cc/attachments/20210915/63d257a3/attachment-0003.gif>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: 911x2b30_CESG_Approval.pdf
Type: application/octet-stream
Size: 748790 bytes
Desc: not available
URL: <http://mailman.ccsds.org/pipermail/sls-cc/attachments/20210915/63d257a3/attachment-0005.obj>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: 911x1p40_CESG_Approval.pdf
Type: application/octet-stream
Size: 659815 bytes
Desc: not available
URL: <http://mailman.ccsds.org/pipermail/sls-cc/attachments/20210915/63d257a3/attachment-0006.obj>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: 912x3b30_CESG_Approval.pdf
Type: application/octet-stream
Size: 867418 bytes
Desc: not available
URL: <http://mailman.ccsds.org/pipermail/sls-cc/attachments/20210915/63d257a3/attachment-0007.obj>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: 912x1p40_CESG_Approval.pdf
Type: application/octet-stream
Size: 668643 bytes
Desc: not available
URL: <http://mailman.ccsds.org/pipermail/sls-cc/attachments/20210915/63d257a3/attachment-0008.obj>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: 911x5b30_CESG_Approval.pdf
Type: application/octet-stream
Size: 770928 bytes
Desc: not available
URL: <http://mailman.ccsds.org/pipermail/sls-cc/attachments/20210915/63d257a3/attachment-0009.obj>