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Titolo:
Simple alternate routing for differentiated services networks
Autore:
Patek, SD; Venkateswaran, R; Liebeherr, J;
Indirizzi:
Univ Virginia, Dept Syst & Informat Eng, Charlottesville, VA 22904 USA Univ Virginia Charlottesville VA USA 22904 Charlottesville, VA 22904 USA Univ Virginia, Dept Comp Sci, Charlottesville, VA 22904 USA Univ VirginiaCharlottesville VA USA 22904 Charlottesville, VA 22904 USA
Titolo Testata:
COMPUTER NETWORKS-THE INTERNATIONAL JOURNAL OF COMPUTER AND TELECOMMUNICATIONS NETWORKING
fascicolo: 3-4, volume: 37, anno: 2001,
pagine: 447 - 466
SICI:
1389-1286(20011105)37:3-4<447:SARFDS>2.0.ZU;2-O
Fonte:
ISI
Lingua:
ENG
Soggetto:
CONGESTION AVOIDANCE; COMPUTER-NETWORKS; IP NETWORKS; QOS; ALGORITHMS; QUALITY;
Keywords:
quality of service; routing; quality of service routing; differentiated services;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
48
Recensione:
Indirizzi per estratti:
Indirizzo: Patek, SD Univ Virginia, Dept Syst & Informat Eng, Thornton Hall, Charlottesville, VA 22904 USA Univ Virginia Thornton Hall Charlottesville VA USA 22904 904 USA
Citazione:
S.D. Patek et al., "Simple alternate routing for differentiated services networks", COMPUT NET, 37(3-4), 2001, pp. 447-466

Abstract

Recent work on differentiated services in the Internet has introduced new notions of quality of service (QoS) which apply to aggregates of traffic innetworks with coarse spatial granularity. Most proposals for differentiated services involve traffic control algorithms for aggregate service levels,packet marking and policing, and preferential treatment of marked packets in the network core. The issue of routing for enhancing aggregate QoS has not received a lot of attention. This study investigates the potential benefit of using multipath routing strategies in support of differentiated services. We propose a traffic control scheme, called simple alternate routing, wherein portions of unmarked packet flows can be assigned to alternate paths through a service provider network (SPN) in response to congestion feedback information. The scheme is simple, requiring only minor changes to the SPN border routers so that alternately routed packets can be tunneled via conventional paths to an intermediate border node and then tunneled from there to the original egress border node. We present distributed algorithms fordiscovering congestion within the SPN and allocating traffic to alternate paths that are uncongested. We have implemented the scheme in a packet-level simulation, and we have examined the transient response of the algorithm to perturbations in the nominal traffic levels experienced by the SPN. The experimental study of this paper provides some understanding of the scheme's ability to adapt in routing packets around congestion. Our results indicate that the multipath routing framework shows promise for aggregate QoS andwarrants further consideration. (C) 2001 Elsevier Science B.V. All rights reserved.

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Documento generato il 23/01/20 alle ore 03:54:40