Not implemented in latest version of the USLP white book post telecon 2 : [Sls-slp] Material to discuss during 3rd USLP Telecon

[Gian.Paolo.Calzolari at esa.int]

Greg,
        please note that the following comments were not implemented

NOTES in 4.1.4.2.1.4 hide requirements. Is misleading (in fact some values 
are not protocol Id?s defined at 
http://sanaregistry.org/r/protocol_id/protocol_id.html ) and the first 3 
notes are actually normative clauses.   Agreed.
Please convert/include the 3 notes to.into normative clause(s).
Note 4 should actually become part of the clause from Note 3 to poiint to 
the (new) SANA registry.

Moreover in telecon #2 "Greg Kazz and Ed Greenberg took the action to 
document how the Sending and Receiving side procedures (4.2 and 4.3) are 
affected if a fixed vs. a variable length transfer frame is used." and it 
would be nice if you could report about this at telecon #3. I think the 
list is going to be rather short....

Lat but not least, in the attached file you find a few remarks about the 
updated chapter 5 on Managed Parameters.
It could be good discussing this at telecon #3 together with the remarks 
for "Not imported parameters" I sent within the file named 
USLP.ManagedParameterSources20160203.pdf

Regards

Gian Paolo




From:   "Kazz, Greg J (312B)" <greg.j.kazz at jpl.nasa.gov>
To:     "SLS-SLP Mailing List" <sls-slp at mailman.ccsds.org>
Date:   12/02/2016 20:48
Subject:        [Sls-slp] Material to discuss during 3rd USLP Telecon
Sent by:        sls-slp-bounces at mailman.ccsds.org



Dear SLP WG,

I will soon create a doodle poll for the 3rd USLP White Book telecon.
The focus will be on Section 2 of the post telecon 2 white book as well as 
a trial balloon pitch for an additional type of Insert Zone service, 
called On-demand insert.


You can find the latest version of the USLP white book post telecon 2 on 
the CWE under:

http://tinyurl.com/jf9j6u3 

It contains the date feb 9 and post telecon 2 in the word file name.

Topic 1 (Section 2 review) is spearheaded by Gian Paolo whose comments you 
will find in the CWE under:

 http://tinyurl.com/jf9j6u3 

At least two key questions need to be discussed by SLP WG concerning the 
review of Section 2. They are:

1) Shall USLP retain the TC Coding capability that a protocol data unit 
transferred can contain several frames? 
The fact that TC coding allows it does not exclude a possible limitation 
on the USLP side (e.g. SLE FSP explicitly forbids the option of including 
several TC frames in a CLTU). 
We shall remember that several frames in a CLTU does decrease performance. 

2) Shall any reference to Proximity-1 coding be removed from the USLP Blue 
Book as long as there is no agreed adaptation for that blue book? 
Note: NASA has submitted an agenda item to the C&S WG chairman to describe 
changes to the CCSDS 211.2-B-2 (Prox-1 C&S Blue Book) including CWE 
project details  to allow USLP transfer frames over the Proximity link.


Topic 2 (On-demand Insert Service) is spearheaded by Ed Greenberg. The 
post telecon 2 white book contains trial sections describing and 
standardizing the two types of Insert Service. The concept is below:

The concept of the two types of Insert Service follows:
USLP provides two complementary types of Insert Service: a) Isochronous 
and b) On-demand. Only one Insert Service type is allowed on a Physical 
Channel at any given time.
The Isochronous Insert Service provides transfer of private, fixed-length, 
octet-aligned service data units across a space link in a mode which 
efficiently utilizes the space link transmission resources at relatively 
low data rates.  The service is unidirectional, periodic, and 
sequence-preserving.  The service does not guarantee completeness, but may 
signal gaps in the sequence of service data units delivered to a receiving 
user.
For a given service instance, only one user, identified with the Physical 
Channel Name of the Physical Channel, can use this service on a Physical 
Channel. Service data units from different users are not multiplexed 
together within one Physical Channel. The presence of the Insert Zone is 
signaled by Managed Parameters.
The On-demand Insert Service provides the optional transfer of private, 
variable length, octet-aligned service data units across a space link in 
an episodic manner. The service is unidirectional, asynchronous, and 
non-sequence preserving. The Insert Zone length may vary between 1 and 255 
octets and is specified in the first octet of the Insert Zone. The 
presence of the on-demand Insert Zone is signaled by the On-demand IZ flag 
in the TF header.
Multiple users may use this on-demand Insert Service on a Master Channel, 
identified with the VCID of the frame which contains the On-demand IZ flag 
set to ?1?.


Best regards,
Greg 
Chairman SLS-SLP WG 


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