Traffic Management



Quality of communication services could comprise several aspects such as the availabil-ity,
reliability and dependability of the services. These aspects relate to the expectation
of users that services are always provided when needed. Other aspects relate to the
quality of established communication sessions and pertain to delay, errors and loss in
the data transfer. For instance, a user of an application such as IP telephony has the
expectation that an established call allows a conversation to take place. Additionally it
is not rendered useless by high delay, which make the interaction difficult, by errors
that make the speech quality unintelligible, or by losses which interrupt the conversa-tion.
The session's quality depends both on the design and performance of the system
running the communicating application as well as on the network.
Network quality depends on the traffic load of the links in the network. This in turn
depends on the amount and characteristics of the traffic entering the network, as well
as the change in characteristics due to multiplexing and the routing of the traffic. This
seemingly simple problem of plumbing becomes exceedingly complex when a network,
such as the Internet, is large geographically, administratively, and in user population.
Traffic in the Internet is extremely complex, resulting from a very large and perpetually
changing range of communication applications. Traffic management consists of char-acterizing,
measuring, classifying and grooming this traffic in order to create order out
of this seeming chaos. A vast amount of work has been performed over the years on
the various aspects of IP traffic management. Service models like Intserv and Diffserv
have been proposed to allow the network to offer a set of quality of service guarantees
to different kinds of applications. The traffic generated by various applications has been
widely studied and the statistical properties of individual flows and traffic aggregates
are beginning to be fairly well understood. New routing techniques like MPLS allow
more efficient traffic engineering.
Despite these significant advances, it remains true to say that much uncertainty still
surrounds the future evolution of the Internet. Some argue that an alternative service
model is required and propose new network architectures and additional traffic con-trols.
Research continues on characterizing traffic and on the development of analytical
modeling techniques enabling performance evaluation and effective network design.


Traffic Control

Book Chapter

Quality of Future Internet Services â?? COST Action 263 Final Report, State-of-the-Art Survey, 2, pp. 10-79, Springer, July 2003

Cited by

Year 2014 : 1 citations

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Year 2007 : 1 citations

 T Bohnert, E Monteiro, Multi-class measurement based admission control for a QoS framework with dynamic resource management, Journal of Network and Systems Management, 2007

Year 2005 : 4 citations

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Year 2004 : 3 citations

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 A Pereira, E Monteiro, Avaliação de mecanismos de gestão de recursos no mapeamento entre os modelos IntServ e DiffServ, Proc. of CRC2004, Leiria, 2004

 V Pereira, Evaluation of Mobile Communications: From Voice Ca, Publication/NA, 2004

Year 2003 : 6 citations

 M Curado, O Reis, J Brito, G Quadrosâ?¦, Stability and scalability issues in Hop-By-Hop class-based routing, Quality of Service in …, 2003

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 G Karlsson, J Roberts, I Stavrakakis, A Alvesâ?¦, Traffic management, Quality of Future Internet …, 2003

Year 2002 : 3 citations

 S Lima, P Carvalho, A Santosâ?¦, A distributed admission control model for class-based networks using edge-to-edge QoS and SLS monitoring, … Systems, 2002. ICCS …, 2002

 A Pereira, E Monteiro, interligação intserv Diffserv: Mapeamento do serviço cL no PHB AF, Proc. of CRC2002, FCCN, Faro, Portugal, 2002

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Year 2001 : 3 citations

 M Oliveira, J Brito, B Melo, G Quadrosâ?¦, Evaluation of a Quality of Service Routing Strategy for the Differentiated Services Framework, Proceedings of the …, 2001

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Year 2000 : 3 citations

 G Quadros, A Alves, E Monteiroâ?¦, The role of packet-dropping mechanisms in QoS Differentiation, Networks, 2000.(ICON …, 2000

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