Abstract
Abstract Various operations related to Quality of Service (QoS) management in communication networks require the clients/users to specify the quality level of the network service. The current QoS proposals adopt a fixed set of performance parameters at the network level to specify quality levels, avoiding dealing with the problem of heterogeneity among QoS parameters and metrics during the service management. However, in several situations where humans are the end-users of the service, the quality level should be specified using Quality of Experience (QoE) parameters, more natural for humans than network performance parameters. On the other hand, the QoS specification using QoE parameters is not sufficient to the service providers; they must translate QoE parameters into network parameters. This paper proposes a semantic approach to the automatic QoE/QoS mapping using the Network QoS Ontology (NetQoSOnt), offering automatic and extensible translation between QoE and QoS parameters. The use of our proposal is illustrated by supporting a voice over IP service negotiation.
Highlights
New networked applications and customers consider essential that service providers guarantee the quality of the services offered
The problems pointed out above arise due to a lack of granularity of the equivalence relations between Quality of Service (QoS) specifications. We address this issue of lack of granularity by offering functionalities for supporting the automatic mapping between QoS parameters adopted by the network service provider (NSP) and the QoS/Quality of Experience (QoE) parameters adopted by the customer/user
This paper proposed an extension of the NetQoSOnt ontology offering resources to automatically map QoS specifications in the different network layers
Summary
New networked applications and customers consider essential that service providers guarantee the quality of the services offered. NetQoSOnt allows the user to specify that the quality level MOS ≤4 is equivalent to guaranteeing certain upper bounds for OWD, IPDV and PLR at the Internet layer As it will be discussed later, this form of QoS/QoE mapping has a granularity issue. This paper proposes a semantic approach, which reuse the NetQoSOnt ontology, providing the functionalities necessary to the automatic mapping of QoS/QoE specifications into different network levels. Our semantic approach allows that different service providers, clients and organizations in general can express their quality levels (required or guarantee qualities) in terms of arbitrary parameters and metrics according to their needs. Our semantic approach offers flexible extensibility, requiring only that service providers and standardization organization publish new parameters, metrics and respective mapping rules specified as classes and individuals in an OWL file on their Web sites.
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