RFC 3006 (rfc3006) - Page 1 of 13
Integrated Services in the Presence of Compressible Flows
Alternative Format: Original Text Document
Network Working Group B. Davie
Request for Comments: 3006 C. Iturralde
Category: Standards Track D. Oran
Cisco Systems, Inc.
S. Casner
Packet Design
J. Wroclawski
MIT LCS
November 2000
Integrated Services in the Presence of Compressible Flows
Status of this Memo
This document specifies an Internet standards track protocol for the
Internet community, and requests discussion and suggestions for
improvements. Please refer to the current edition of the "Internet
Official Protocol Standards" (STD 1) for the standardization state
and status of this protocol. Distribution of this memo is unlimited.
Copyright Notice
Copyright (C) The Internet Society (2000). All Rights Reserved.
Abstract
An Integrated Services (int-serv) router performs admission control
and resource allocation based on the information contained in a TSpec
(among other things). As currently defined, TSpecs convey
information about the data rate (using a token bucket) and range of
packet sizes of the flow in question. However, the TSpec may not be
an accurate representation of the resources needed to support the
reservation if the router is able to compress the data at the link
level. This specification describes an extension to the TSpec which
enables a sender of potentially compressible data to provide hints to
int-serv routers about the compressibility they may obtain. Routers
which support appropriate compression take advantage of the hint in
their admission control decisions and resource allocation procedures;
other routers ignore the hint. An initial application of this
approach is to notify routers performing real-time transport protocol
(RTP) header compression that they may allocate fewer resources to
RTP flows.
Davie, et al. Standards Track