RFC 3006 (rfc3006) - Page 1 of 13

Integrated Services in the Presence of Compressible Flows

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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
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