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This draft is a work item of the Reliable Multicast Transport Working Group of the IETF.
Title : Negative-acknowledgment (NACK)-Oriented Reliable Multicast (NORM) Protocol
Author(s) : B. Adamson, et al.
Filename : draft-ietf-rmt-pi-norm-revised-04.txt,.ps,.pdf
Pages : 86
Date : 2007-3-8
This document describes the messages and procedures of the Negative-
acknowledgment (NACK) Oriented Reliable Multicast (NORM) protocol.
This protocol is designed to provide end-to-end reliable transport of
bulk data objects or streams over generic IP multicast routing and
forwarding services. NORM uses a selective, negative acknowledgment
mechanism for transport reliability and offers additional protocol
mechanisms to allow for operation with minimal "a priori"
coordination among senders and receivers. A congestion control
scheme is specified to allow the NORM protocol to fairly share
available network bandwidth with other transport protocols such as
Transmission Control Protocol (TCP). It is capable of operating with
both reciprocal multicast routing among senders and receivers and
with asymmetric connectivity (possibly a unicast return path) between
the senders and receivers. The protocol offers a number of features
to allow different types of applications or possibly other higher
level transport protocols to utilize its service in different ways.
The protocol leverages the use of FEC-based repair and other IETF
reliable multicast transport (RMT) building blocks in its design.
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