This section introduces the notion of Quality of Service as it is currently provided by the Internet. As of today, the Internet offers a point-to-point delivery service, which is based on the "best effort" delivery model. In this model, data are delivered to their destinations as soon as possible, but with no bandwidth or latency guarantees. Using protocols, such as TCP, the highest guarantee t...

This paper focuses on task modelling of a Three Layer Quality of Service (QoS) model (TRAQS). The TRAQS model comprises of three perspective layers, namely: User Perspective Layer (UPL), Application Perspective Layer (APL) and Transmission Perspective Layer (TPL), for the provision and negotiation of QoS in multimedia communications. We provide a review of current QoS protocols and architecture...

Unlike snapshot queries in traditional databases, the processing of continuous queries in Data Stream Management Systems (DSMSs) needs to satisfy user-specified QoS requirements. In this paper, we focus on three major QoS parameters in a DSMS environment: processing delay, querying frequency and loss tolerance. To minimize processing delays, the Earliest Deadline First (EDF) CPU scheduling poli...

In the last years, multimedia applications have been evolving and taking an important role in the multi-domain information exchange on the Internet. Although the QoS parameters required by the multimedia applications are well known and some form of guaranteed QoS is available at transport and network layers, there is no standard QoS specification enabling to deploy the underlying mechanisms in ...

Quality of Service (QoS) in Mobile Ad hoc Networks (MANETs) is a challenging task because of restricted resource and dynamic configuration. To support QoS, the link state information i.e. bandwidth, delay, cost, jitter, node energy and error rate in the network should be existed and manageable. The concentration of this paper is exploring the scope to QoS routing mechanism, to report the source...

Service-oriented software is composed of a combination of services. Because of the dynamic nature of the Web service environment, the QoS often fluctuates with inherent uncertainty and therefore needs to be dynamically replaced. Based on the changes in the QoS of the software itself and users’ requirements for the software, this paper proposes a dynamic replacement approach based on the cloud m...

In the context of heterogeneous wireless networks, or 4G networks, a number of problems are yet to be solved. One of these problems is the lack of Layer 2 QoS provisioning in heterogeneous networks, mainly due to the non-uniform nature of the QoS models and service interfaces among different wireless technologies. In addition, 4G access networks may include Access Points with no dedicated chann...

The internet is used for wide variety of applications in wired, fixed wireless and mobile wireless environment. The requirements of one application / environment will vary from another application / environment. The challenge for the service provider is Quality of Service (QoS). The wired network has less complexity compared to fixed wireless network with respect to QoS. Certainly, the challeng...

B.G. Kim and Hengky Susanto Hwang S. Lee Computer Science Dept. Electrical Eng. Dept. Univ. of Mass. Lowell KAIST {kim, hsusanto}@cs.uml.edu [email protected] Abstract A vertical handoff technique switches a mobile station among wireless networks with different technologies. Since a different network may not support the same QoS, the vertical handoff technique has to consider user QoS...