Constrained Application Protocol Block-Wise Transfer Options Supporting Robust Transmission
RFC 9177, “Constrained Application Protocol Block-Wise Transfer Options Supporting Robust Transmission”, is a Proposed Standard document published in March 2022 by M. Boucadair, J. Shallow. The canonical text is published by the RFC Editor.
Abstract
This document specifies alternative Constrained Application Protocol (CoAP) block-wise transfer options: Q-Block1 and Q-Block2.
These options are similar to, but distinct from, the CoAP Block1 and Block2 options defined in RFC 7959. The Q-Block1 and Q-Block2 options are not intended to replace the Block1 and Block2 options but rather have the goal of supporting Non-confirmable (NON) messages for large amounts of data with fewer packet interchanges. Also, the Q-Block1 and Q-Block2 options support faster recovery should any of the blocks get lost in transmission.
What “Proposed Standard” means
An entry-level standards-track specification: stable, peer-reviewed and a solid basis for implementation, though it may still evolve before becoming an Internet Standard.
The canonical text of RFC 9177 is hosted at rfc-editor.org. Available in HTML,TXT,PDF,XML.
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