RFC 9441 - Static Context Header Compression (SCHC) Compound Acknowledgement (ACK)

Contents

• 1. Introduction
• 2. Terminology
• 3. SCHC Compound ACK
  • 3.1. SCHC Compound ACK Message Format
  • 3.2. SCHC Compound ACK Behavior
    • 3.2.1. ACK-on-Error Mode
• 4. SCHC Compound ACK Example
• 5. SCHC Compound ACK YANG Data Model
  • 5.1. SCHC YANG Data Model Extension
  • 5.2. SCHC YANG Tree Extension
• 6. SCHC Compound ACK Parameters
• 7. Security Considerations
• 8. IANA Considerations
  • 8.1. URI Registration
  • 8.2. YANG Module Name Registration
• 9. References
  • 9.1. Normative References
  • 9.2. Informative References
• Acknowledgements
• Authors' Addresses

Abstract

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.

Status of This Memo

This is an Internet Standards Track document.

This document is a product of the Internet Engineering Task Force (IETF). It represents the consensus of the IETF community. It has received public review and has been approved for publication by the Internet Engineering Steering Group (IESG). Further information on Internet Standards is available in Section 2 of RFC 7841.

Information about the current status of this document, any errata, and how to provide feedback on it may be obtained at https://www.rfc-editor.org/info/rfc9441.