I-D ACTION:draft-ietf-rmt-pi-norm-revised-04.txt

A New Internet-Draft is available from the on-line Internet-Drafts 
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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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