Blue Books: Recommended Standards

CCSDS Recommended Standards (Blue Books) define specific interfaces, technical capabilities or protocols, or provide prescriptive and/or normative definitions of interfaces, protocols, or other controlling standards such as encoding approaches. Standards must be complete, unambiguous and at a sufficient level of technical detail that they can be directly implemented and used for space mission interoperability and cross support. Standards must say very clearly, “this is how you must build something if you want it to be compliant”.

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File732x1b3e1.pdf
Document NumberCCSDS 732.1-B-3
Document TitleUnified Space Data Link Protocol
Issue Number3
Published DateJune 2024
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 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.

Book TypeBlue Book
AreaSLS
Working GroupSLS-SLP

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