[Liaisons] CCSDS Review of CCSDS 732.1-P-2.1, Unified Space Data Link Protocol

[CCSDS Rapporteur]

Control Number: XRP 23-21

The following draft CCSDS Recommended Standard has been placed on line and is available for CCSDS-ISO TC 20/SC 13 Liaison review:

     CCSDS 732.1-P-2.1. Unified Space Data Link Protocol. Pink 
                        Sheets. Issue 2.1. September 2023.

DOCUMENT DESCRIPTION:  This CCSDS Recommended Standard specifies the Unified Space Data Link Protocol (USLP) for use by space missions over space-to-ground, ground-to-space, or space-to-space communications links. The current draft update adds VC Packet and VC Access services, changes the maximum number of frames per CLTU from one to greater than one to match the Telecommand specification, and adds to the security section a table, a diagram, and text concerning the order of COP to SDLS, similar to the Telecommand specification.

The due date for receipt of review comments by the Secretariat is 25 October 2023.  CCSDS-ISO TC 20/SC 13 Liaisons may submit review comments directly to the CCSDS Secretariat.  More information is available at the Web site identified below.

The review document, in Portable Document Format (PDF), and associated review materials are available for downloading at the following location:

     https://public.ccsds.org/review/CCSDS%20732.1-P-2.1/default.aspx