The new communication environment has brought new requirements on the qualities of service for which the present "best effort" semantics is inadequate. The response to this evolution goes through the definition of a new model of QoS for the lower layers. In the “best effort” model, when a service provider accepts a transmission with a given QoS, it does not commit itself to any duty about the w...

Wireless Multimedia Sensor Networks (WMSNs) have entered the class of Wireless Sensor Networks to meet the multimedia requirements of new emerging applications, such as surveillance and telepresence. WMSNs commonly carry heterogeneous traffic with different Quality of Service (QoS) requirements. In this paper, the state of the art in QoS, protocols, Test beds, Simulators and the QoS requirement...

quality-of-service, negotiation, agents, distributed object systems Quality-of-Service (QoS) encompasses a wide range of nonfunctional characteristics, including reliability, security, and performance and is becoming increasingly important in businesscritical distributed systems. Such systems are increasingly deployed in open networks, such as the Internet, where resource allocation and load va...

In this paper, we propose an approach to QoS (Quality of Service) routing in a multimedia, multihop, wireless network. The wireless net can be either stand alone, or connected to the wired net. The main focus of the paper is the QoS routing procedure which can inform the source of the bandwidth and quality of service available to any destination in the wireless network. This knowledge enables t...

When describing Web services, one of the obvious aspects that needs representing is Quality of Service” (QoS), the capability of a Web service to meet an acceptable level of service as per factors such as availability and accessibility. However too much of a focus on developing functional QoS ontologies has led to an over-emphasis on representing solely QoS metrics and units of measurement. For...

Effective and efficient Quality of Service (QoS) management is critical for a service grid to meet the requirements of both grid users and service providers. We incorporate QoS management into Open Grid Services Architecture (OGSA) and provide a high-level middleware to build complex applications with QoS guarantees. We introduce a scalable framework of information service in which capabilities...

For an end-to-end QoS-enabled service, the service discovery and delivery mechanisms are required to be aware of QoS and be able to differentiate its behavior according to the negotiated QoS level. This paper presents a work-inprogress scheme for achieving quality of service in service discovery and delivery networks. Based on the Universal Plug & Play standard, we propose an architecture which...

Quality of service (QoS) is an important consideration in networking, but it is also a significant challenge. Providing QoS guarantees becomes even more challenging when you add the complexities of wireless and mobile networks. This paper discusses the challenges and solutions involved in providing QoS in wireless data networks. Multiple techniques for providing service guarantees are presented...

As service orientation is gaining more and more momentum, the need for common concepts regarding Quality of Service (QoS) and its specification emerges. In recent years numerous approaches to specifying QoS were developed for special subjects like multimedia applications or middleware for distributed systems. However, a survey of existing approaches regarding their contribution to service orien...