A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Transport Area Working Group Working Group of the IETF.
Title : Quick-Start for TCP and IP
Author(s) : S. Floyd, et al.
Filename : draft-ietf-tsvwg-quickstart-00.txt,.ps
Pages : 65
Date : 2005-6-3
This document specifies an optional Quick-Start mechanism for
transport protocols, in cooperation with routers, to determine an
allowed sending rate at the start and at times in the middle of a
data transfer. While Quick-Start is designed to be used by a range
of transport protocols, in this document we describe its use with
TCP. By using Quick-Start, a TCP host, say, host A, would indicate
its desired sending rate in bytes per second, using a Quick Start
Request option in the IP header of a TCP packet. Each router along
the path could, in turn, either approve the requested rate, reduce
the requested rate, or indicate that the Quick-Start request is not
approved. If the Quick-Start request is not approved, then the
sender would use the default congestion control mechanisms. The
Quick-Start mechanism can determine if there are routers along the
path that do not understand the Quick-Start Request option, or have
not agreed to the Quick-Start rate request. TCP host B communicates
the final rate request to TCP host A in a transport-level Quick-
Start Response in an answering TCP packet. Quick-Start is designed
to allow connections to use higher sending rates when there is
significant unused bandwidth along the path, and all of the routers
along the path support the Quick-Start Request.
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