Name: draft-ietf-rmt-bb-pgmcc-03
Title: PGMCC single rate multicast congestion control: Protocol Specification
State: Active
Authors: Luigi Rizzo, Gianluca Iannaccone, Lorenzo Vicisano, Mark Handley
Group: Reliable Multicast Transport (rmt)
Date: 2004-07-14
This document describes PGMCC, a single rate multicast congestion control
scheme which is TCP-friendly and achieves scalability, stability and fast
response to variations in network conditions. PGMCC is suitable for both
non-reliable and reliable data transfers. It is mainly designed for NAK-
based multicast protocols, and uses a window-based, TCP-like control loop
using positive ACKs between one representative of the receiver group (the
ACKER) and the sender. The ACKER is selected dynamically and may change
over time. PGMCC is made of two components: a window-based control loop,
which closely mimics TCP behaviour, and a fast and low- overhead procedure
to select (and track changes of) the ACKER. The scheme is robust to
measurement errors, and supports fast response to changes in the receiver
set and/or network conditions.
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