Quality of service policies in communications is one of the current trends in distributed systems based on middleware technology. To implement the QoS policies it is necessary to define some common parameters. The aim of the QoS policies is to optimize the user defined QoS parameters. This article describes how to obtain the common QoS parameters using message queues for the communications and ...

A generic QoS mapping mechanism for distributed multimedia applications is presented. A generic multilevel QoS model is also proposed. A user can specify the user QoS abstractly in the highest level of the proposed QoS model, and QoS in lower level than user level QoS is expressed in level-specific QoS parameters. Hence two QoS mapping methods are developed. The first method maps the abstract u...

The wireless networks are experiencing higher delay, higher error rate, and lower bandwidth compared to wired networks. The customers not only need mobility but also quality. It is a great challenge for the service providers to offer Quality of Service (QoS). The QoS parameters are divided into two categories such as Qualitative QoS parameters (reliability, security, etc.) and Quantitative QoS ...

Quality of Service (QoS) refers to a set of rules or techniques that help the network administrators use the available network resources optimally to manage the effects of congestion and to treat the applications according to their needs. The differentiated services architecture (DiffServ) allows providing quality of service to users. The major DiffServ premise is that individual flows with sim...

The framework for a unified QoS support mechanism for IP traffic over UMTS and Wireless LANs is discussed. The work addresses the potential issues that emerge when using UMTS and WLANs as access systems to an IP core and focuses on defining a consistent mechanism that will support QoS and resource reservation in a unified. The proposed approach utilizes the RSVP for negotiating QoS parameters a...

In order to support multimedia communication, it is necessary to develop routing algorithms which use for routing more than one QoS parameters. This is because new services such as video on demand and remote meeting systems require better QoS. Also, for the Call Admission Control (CAC) of multimedia applications different QoS parameters should be considered. In our previous work, we proposed an...

In this study, a network quality of service (QoS) evaluation system was proposed. The system used a combination of fuzzy C-means (FCM) and regression model to analyse and assess the QoS in a simulated network. Network QoS parameters of multimedia applications were intelligently analysed by FCM clustering algorithm. The QoS parameters for each FCM cluster centre were then inputted to a regressio...

This paper introduces a new approach to the description of QoS parameters. As unified properties, events and activities derived from data-streams captured at an edge-system are used in combination with a correlation procedure to describe QoS parameters. This leads to an uniform, layer and protocol independent approach to the description of QoS-parameters which is applicable in the design as wel...

In this paper, the authors develop a comprehensive framework for QoS management based on soft probabilistic contracts. The authors approach also encompasses general QoS parameters, with “response time” as a particular case. In addition, the authors support composite QoS parameters, for example, combining timing aspects with “quality of data” or security level. They also study contract compositi...

In this paper, the authors develop a comprehensive framework for QoS management based on soft probabilistic contracts. The authors approach also encompasses general QoS parameters, with “response time” as a particular case. In addition, the authors support composite QoS parameters, for example, combining timing aspects with “quality of data” or security level. They also study contract compositi...