This paper describes the design, implementation and use of a wireless data network test-bed to support a facilitator-led experiment measuring the quality of service (QoS) of selected mobile applications. The test-bed comprised a wireless LAN, wireless-capable Personal Digital Assistants acting as “3G-like” terminals, with a network performance emulator at the IP-layer providing controlled, repr...

Grid computing provides a robust paradigm for aggregating disparate resources in a secure and controlled environment. The emerging grid infrastructure gives rise to a class of scientific applications and services in support of collaborative and distributed resource-sharing requirements, as part of teleimmersion, visualization and simulation services. Because such applications operate in a colla...

Communication services that provide enhanced Quality of Service (QoS) guarantees related to dependability and real time are important for many applications in distributed systems. This paper presents real-time dependable (RTD) channels, a communication-oriented abstraction that can be configured to meet the QoS requirements of a variety of distributed applications. This customization ability is...

Service Oriented Applications have the ability to change their constituent services. This involves that they have the ability to change both their functionality and their Quality of Service requisites at runtime. In this paper, Multi-Agent System is used, which uses multiple double auctions, to enable applications to self-adapt, based on their Quality of Service attributes and cost constraints....

This work investigates the role and importance of some of the key aspects of QoS planning, provisioning, monitoring and optimisation (QoS Management) for UMTS Terrestrial Radio Access (UTRA) FDD networks within the framework of the 3 Generation Partnership Project (3GPP). Firstly, the differences between Quality of end user Experience (QoE) and Quality of Service (QoS) are explained. This is fo...

Complex software and network based information server systems may exhibit failures. Quite often, such failures may not be accidental. Instead some failures may be caused by deliberate security intrusions with the intent ranging from simple mischief, theft of confidential information to loss of crucial and possibly life saving services. Not only it is important to prevent and/or tolerate securit...

The paper discusses the design and prototype implementation of a QoS-aware multimedia database system. Recent research in multimedia databases has devoted little attention to the aspect of the integration of QoS support at the user level. Our proposed architecture to enable end-to-end QoS control, the QoS-Aware Query Processor (QuaSAQ), satisfies user specified quality requirements. The users n...

This document defines a number of Diameter attribute-value pairs (AVPs) for traffic classification with actions for filtering and Quality of Service (QoS) treatment. These AVPs can be used in existing and future Diameter applications where permitted by the Augmented Backus-Naur Form (ABNF) specification of the respective Diameter command extension policy. Information about the current status of...

Agent service description and matchmaking problem for autonomic element has been taken as one of the most important issue in the field of autonomic computing based on agent and multi-agent system. Considering the semantic and QoS for capability description of agent service are two important issues during matchmaking, the factors of semantic and QoS during matchmaking are considered together, an...