[Sls-slp] Encapsulation packets over TC VC Packet service?
john.pietras at gst.com
Fri Oct 23 15:27:29 UTC 2020
SLS-SLP colleagues ---
Section 126.96.36.199 of the Encapsulation Packet Protocol Blue Book (CCSDS 133.1-B-3) specifies the content of the SDLP_Channel for the various underlying space data link protocols (SDLPs):
"a) for the Virtual Channel Packet (VCP) service of TM (reference ), TC (reference ),
or AOS (reference ), SDLP_Channel shall contain the Global Virtual Channel
b) for the MAP Packet (MAPP) service of TC (reference ) and USLP (reference ),
SDLP_Channel shall contain the Global MAP ID (GMAP ID);
c) for the Packet Service of Proximity-1 (reference ), SDLP_Channel shall contain the
Transfer Frame Version Number, the Spacecraft Identifier (SCID), the Physical
Channel Identifier (PCID), the Data Field Construction ID (DFC_ID), and the Port ID."
Missing from this list is any mention of the Virtual Channel Packet service of TC (section 3.4 of CCSDS 232.0-B-3. Was this exclusion accidental or intentional - i.e., is Encapsulation over the TC VC Packet service disallowed? I suggest that the issue be resolved unambiguously one way or the other - that is, either add it to the list of SDLP_Channels that contain GVCIDs or add a note that explicitly rules out in that usage.
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