An advanced architecture for inter-domain QoS analysis, developed in the framework of European IST Project INTERMON, for automation of tasks in the area of inter-domain QoS/SLA monitoring, connectivity planning and traffic engineering is presented. The main focus of the INTERMON toolkit is the integration of tools covering different aspects of QoS analysis in large scale Internet environment su...

Quality of Service (QoS)-enabled Publish/Subscribe (pub/sub) middleware provides powerful support for data dissemination. It is hard, however, to maintain specified QoS properties (such as reliability and latency) in dynamic environments (such as disaster relief operations or power grids). For example, managing QoS manually is not feasible in dynamic systems due to slow human response times and...

To detect possible quality of service (QoS) degradation and locate the cause of the degradation, end-to-end QoS monitoring is not sufficient. Instead, QoS distribution should be monitored, i.e., the distribution of QoS experienced by a real-time flow in different network segments should be monitored. However, few of current monitoring systems can provide QoS distribution monitoring. This paper ...

This paper deals with the design and investigation of an approach for dynamic and on demand QoS on videoconference sessions for GRNET’s (Greek NREN) network. After the activation of QoS service in GRNET, a new need for automation of mechanisms for QoS in Videoconferencing session arises. The traditional QoS workflow inserts important administrative cost when a connected institute wants to have ...

With the evolution of QoS-capable 3G wireless networks, the wireless community has been increasingly looking for a framework that can provide effective network-independent end-toend QoS control. In this article we first construct such a framework and then describe how dynamic SLA-based control can be used to achieve end-to-end QoS in a wired and wireless (UMTS) environment. The proposed framewo...

Quality of Service (QoS) guarantees must be supported in a network that intends to carry real time and multimedia traffic. IETF RFC 2386 defines QoS as a set of service requirements to be met by the network while transporting a packet stream from source to the destination. The dynamic network topology and wireless bandwidth sharing makes QoS provisioning far more challenging in wireless network...

With the evolution of QoS-capable third generation wireless networks, the wireless network community has been increasingly looking for a framework that can provide an effective, network independent, end-to-end QoS control. In this paper, we first construct such a framework and then describe how dynamic SLA-based control can be used to achieve end-to-end QoS in a wired and wireless (UMTS) enviro...

Quality of Service (QOS) test is a process of verifying the system's acceptability of a given QOS specification. Although the result of a QOS test depends on such system performance factors as the available reSOllfces, it is also influenced by the implementation of a codec scheme involved. In this paper, we argue that a good knowledge about the performance of the compressor and decornpressor ca...

This paper discusses how to make a distributed object system flexible so as to satisfy the application’s requirement in the change of the system environment. Each object supports other objects with quality of service (QoS). The change of the system is modeled to be the change of QoS supported by the objects. We discuss relations among the operations with respect to QoS, i.e. QoS-based equivalen...

Nowadays, Quality of Service in dynamic, wireless multi-hop Ad Hoc networks is becoming a hot research topic. Various QoS routing protocols are proposed. However, most of the QoS routing protocols provide single route to reach from source to destination. Once links break due to node mobility, establishment of new routes leads to large control overhead and extra end-to-end delay. Thus multipath ...