Technical Summary
This document is an RMT Building Block that specifies data and
procedures useful for building a reliable multicast transport
protocol based on negative-acknowledgment (NACK) feedback.
draft-ietf-rmt-bb-norm-revised specifically defines the following
main components for use in protocol instantiations:
1) Multicast sender transmission strategies
2) NACK repair process with timer-based feedback suppression
3) Round-trip timing for adapting NACK and other timers
draft-ietf-rmt-bb-norm-revised also includes context information
defining the intended usage and applicability of the NACK building
Block, in compliance with RFC 3269.
Another RMT WG document, draft-ietf-rmt-pi-norm-revised, uses the
specifications in this document to fully-define a NACK based
reliable multicast transport protocol.
Working Group Summary
There is consensus in the WG to publish this documents.
Document Quality
The NORM Protocol Specification (RFC3940 and revised draft) is
based upon the techniques described in this "building block" document.
A public domain, open source implementation of the NORM protocol is
available for use from the U.S. Naval Research Laboratory. This
implementation has been widely used in a number of applications,
including military and commercial systems. The INRIA has an
implementation in progress.
The content of this document was already reviewed and approved for
publication as experimental RFC 3941. This document contains minor
technical modifications.
Personnel
Lorenzo Vicisano is the Document Shepherd.
Magnus Westerlund is the Responsible Area Director.