An Analysis of Quality of Service Architectures : Principles, Requirements, and Future Trends

An Analysis of Quality of Service Architectures : Principles, Requirements, and Future Trends

Eduardo M. D. Marques (University of Madeira, Portugal), Lina M. P. L. de Brito (University of Madeira, Portugal), Paulo N. M. Sampaio (University of Madeira, Portugal) and Laura M. Rodríguez Peralta (University of Madeira, Portugal)
DOI: 10.4018/978-1-61520-791-6.ch002
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During the last years Internet evolution demanded for new and richer applications. To fulfill the novel and more complex application requirements, new solutions in many domains were required. One of these domains is the network support, assuring, into some extend, a specific or predictable treatment to traffic; therefore, in this chapter, we present a broad view of the main efforts available on the literature in order to provide Quality of Service (QoS) in both wired networks and wireless sensor networks (WSNs). For this purpose, the authors present: (1) the more relevant QoS architectures and technologies along with some of its recent improvements; (2) the different perspectives that combine some of those architectures and technologies into more complex solutions, in order to achieve stronger QoS and/or performance; (3) the most relevant QoS issues in WSNs environments; and (4) through the comparison of the several solutions, they list the advantages and limitations and reveal some relations among the existing QoS solutions.
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Quality Of Service Architectures

In the last two decades some architectures and technologies emerged as solutions to new applications and networks requirements. The proposed architectures had a strong and distinct principle guiding its creation and tried to solve some of the existing problems or limitations of the traditional networks. In some cases, these problems are still present in the current networks.

The architectures that will be presented in this section approach the issue of the traffic differentiation from different perspectives in wired IP networks, having as main goal, in some cases, the support of rich applications and, in other cases, the improvement of the network utilization.

Multiprotocol Label Switch (MPLS) and Traffic Engineering (TE) are also introduced in this section. The main goals and principles of each one of these technologies is not to provide native support to QoS, but instead to propose mechanisms to provide special treatment to flows crossing an MPLS or TE enabled network.

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