rfc3006.Integrated Services in the Presence of Compressible Flows

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Network Working Group B. DavieRequest for Comments: 3006 C. IturraldeCategory: Standards Track D. Oran Cisco Systems, Inc. S. Casner Packet Design J. Wroclawski MIT LCS November 2000 Integrated Services in the Presence of Compressible FlowsStatus 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 [Page 1]

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