[Sls-slp] USLP Issue 8 - COP Management

Gian.Paolo.Calzolari at esa.int Gian.Paolo.Calzolari at esa.int
Thu Mar 10 13:16:16 UTC 2016

        I would like to come back on a minor point about  USLP Issue 8 - 
COP Management as reported in the snapshot.
I still agree that the details of COP Management are defined outside USLP 
(i.e. COP-1, SLE, Proximity-1), however the USLP capability of interfacing 
to COPs Management (for COP-1 and for COP-P) has to be in the USLP book as 
CCSDS 232.0-B-3 TC SDLP includes the capabilities for interfacing to 

Note that the plura is used in "COPs Management"  as the interfacing shall 
be available for both COP-1 and COP-P.
Some investigation is likley o be required to check about any possible 
difference in USLP interfacing to COP-1 or COP-P.

With reference to the attached file this means that USLP book (also for 
consistency with e.g. the TC approach) should at least:
1)  similarly to Table 2-1 of TC SDLP, include a row for "COPs Management" 
in Table 2 1:  Summary of Services Provided by USLP Space Data Link 
2)  similarly to section of TC SDLP, include a section 2.2.3.x for 
COPs Management Service. Most likely the text  from of TC SDLP may 
be sufficient with minor additions.
3)  similarly to Figure 2-3 of TC SDLP, show the COPs Management Service 
towards Virtual Channel generation box in USLP Figure 2 5:  Internal 
Organization of Protocol Entity (Sending End)
4)  similarly to section 3.9 of TC SDLP, include a section 3.x for COPs 
Management Service. Most likely this section should be structured as 
follows (unless the parameters for COP-1 and COP-P are the same)
3.x     COPs Management Service
        3.x.1   Overview
        3.x.2   COP-1 Management Service Parameters
        3.x.3   COP-1 Management Service Primitives
        3.x.4   COP-P Management Service Parameters
        3.x.5   COP-P Management Service Primitives
5) similarly to section 4.3.5 of TC SDLP, include in section 4.2.5 VIRTUAL 
CHANNEL GENERATION FUNCTION the FOP-(1/P) capability to accept Directives 
from a COPs Management Service User and update accordingly Figure 4 15: 
Abstract Model of Virtual Channel Generation Function. 
6)  similarly to section 4.4.5 of TC SDLP, include in USLP section 4.3.5 

So it looks as a dedicated (sub)point about USLP vs. COPs and the 
interfacing to their management service(s) should be added to the SLP 
agenda for Cleveland. 

That's all for now.

Best regards

Gian Paolo

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