RFC 9441

Static Context Header Compression (SCHC) Compound Acknowledgement (ACK), July 2023

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RFC 8724, RFC 9363
J. Zúñiga
C. Gomez
S. Aguilar
L. Toutain
S. Céspedes
D. Wistuba
lpwan (int)

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DOI:  https://doi.org/10.17487/RFC9441

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This document updates the Static Context Header Compression (SCHC) and fragmentation protocol (RFC 8724) and the corresponding YANG module (RFC 9363). It defines a SCHC Compound Acknowledgement (ACK) message format and procedure, which are intended to reduce the number of response transmissions (i.e., SCHC ACKs) in the ACK-on-Error Mode, by accumulating bitmaps of several windows in a single SCHC message (i.e., the SCHC Compound ACK).

Both the message format and procedure are generic, so they can be used, for instance, by any of the four Low-Power Wide Area Network (LPWAN) technologies defined in RFC 8376, which are Sigfox, Long Range Wide Area Network (LoRaWAN), Narrowband Internet of Things (NB-IoT), and IEEE 802.15.4w.

For the definition of Status, see RFC 2026.

For the definition of Stream, see RFC 8729.

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