QoS is essential in MANET to satisfy the communication constraints. Due to the fully mobile infrastructure and limited resources provided by the MANETs, qos techniques need to optimize the scarce resource. To meet the qos requirements of the applications, multicast routing protocols are required to construct the routes, with the qos being guaranteed. Previous qos routing/multicast routing proto...

The rapid evolution of Grid Computing and the development of new middleware services make Grid platforms increasingly used not only for best effort scientific jobs but also in industrial and business applications. This has taken to the growing demand of Quality of Service (QoS) support. However, the QoS issue on Grid is quite difficult, as Grid has been originally designed without any QoS suppo...

In this paper we propose the use of statistical QoS guarantees for transmission over the wireless channel. Here, instead of QoS assurances, we propose to guarantee the percentage of time the QoS requirements are satisfied. We present an associated scheduling algorithm for the opportunistic multiple access system. We compare the proposed scheduler with popular schedulers from the literature. We ...

This paper presents a generic model driven approach to enable Quality of Service (QoS) modeling and realization for component based middleware platforms. We describe a QoS metamodel that makes it possible to support multi category QoS instead of introducing a static set of QoS properties into the modeling method. The metamodel is integrated with the UML metamodel and the Component Implementatio...

Recently MPLS is used for building up VPNs in IP backbone, called MPLS VPNs. In this paper, we discuss issues on finding routes with QoS requirements (i.e., QoS routing) in MPLS VPNs. We first present background on MPLS VPNs as well as QoS routing. Then we discuss both the benefits and problems resulted from introducing QoS routing into MPLS VPNs. We particularly present an architecture of MPLS...

Many Grid applications, such as interactive and collaborative environments, can benefit from guarantees for resource performance or quality of service (QoS). Although QoS mechanisms have been developed for different types of resources, they are often difficult to use together because they have different semantics and interfaces. Moreover, many of them do not allow QoS requests to be made in adv...

The increasing number of functionally similar services requires the existence of a non-functional properties selection process based on the Quality of Service (QoS). Thus, in this article, authors focus on the provision of a QoS model, an architecture and an implementation which enhance the selection process by the annotation of Service Level Agreement (SLA) templates with semantic QoS metrics....

This paper presents a usability-testing plan for real-time QoS management. We employ a holistic Three Layer QoS (TRAQS) model that defines three perspectives for the negotiation of QoS. The TRAQS model allows the user to specify the desired QoS by using a QoS Parameter Taxonomy and an Application Taxonomy. For the specification of the desired QoS a variety of graphical and physical interfaces c...

Negotiating multiple SLAs in itself is not sufficient to guarantee end-to-end QoS levels as SLAs in practice often give probabilistic QoS guarantees and SLA violations can still occur. Moreover probabilistic QoS guarantees do not necessarily capture time-dependent behavior, (e.g., short term service degradations). Therefore, the negotiation of SLAs needs to be supplemented with run-time QoS-con...

With the growing popularity of Web services, a general QoS support for Web services will play an important role for the success of this emerging technology. Unfortunately, current Web service environments do not offer comprehensive QoS support. In this paper, we present an approach that does not only enable the QoS integration in Web services, but also the selection of appropriate services base...