A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Datagram Congestion Control Protocol Working Group of the IETF.
Title : TCP Friendly Rate Control (TFRC): the Small-Packet (SP) Variant
Author(s) : S. Floyd, E. Kohler
Filename : draft-ietf-dccp-tfrc-voip-04.txt,.ps
Pages : 34
Date : 2006-1-25
The proposal in this document is intended to be experimental. More
specifically, this proposal is intended for further experimentation,
but not for widespread deployment at this time in the global
Internet.
TCP-Friendly Rate Control (TFRC) is a congestion control mechanism
for unicast flows operating in a best-effort Internet environment
[RFC 3448]. TFRC was intended for applications that use a fixed
packet size, and was designed to be reasonably fair when competing
for bandwidth with TCP connections using the same packet size. This
document proposes TFRC-SP, a Small-Packet (SP) variant of TFRC, that
is designed for applications that send small packets. The design
goal for TFRC-SP is to achieve the same bandwidth in bps as a TCP
flow using packets of up to 1500 bytes. TFRC-SP enforces a Min
Interval of 10 ms between data packets, to prevent a single flow
from sending small packets arbitrarily frequently.
Flows using TFRC-SP compete reasonably fairly with large-packet TCP
and TFRC flows in environments where large-packet flows and small-
packet flows experience similar packet drop rates. However, in
environments where small-packet flows experience lower packet drop
rates than large-packet flows (e.g., with Drop-Tail queues in units
of bytes), TFRC-SP can receive considerably more than its share of
the bandwidth.
A URL for this Internet-Draft is:
http://www.ietf.org/internet-drafts/draft-ietf-dccp-tfrc-voip-04.txt
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