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The focus of this thesis is continuous real-time monitoring, which is essential for the realization of adaptive management systems in large-scale dynamic environments. Real-time monitoring provides the necessary input to the decision-making process of network management. We have developed, implemented, and evaluated a design for real-time continuous monitoring of global metrics with performance objectives,...
A key requirement for autonomic (i.e., self-*) management systems is a short adaptation time to changes in the networking conditions. In this paper, we show that the adaptation time of a distributed monitoring protocol can be controlled. We show this for A-GAP, a protocol for continuous monitoring of global metrics with controllable accuracy. We demonstrate through simulations that, for the case of...
In-network management (INM) is a new paradigm for the management of the future Internet that is based on the principles of decentralization and self-organization. Its goal is to overcome the limitations of traditional network management and to achieve scalable and robust management systems with low complexity for large-scale, dynamic network environments. In this paper, we describe a framework for...
Traditional centralized management approaches are not suitable for Ambient Networks (ANs), since centralized management systems neither scales well nor adapts fast enough to changing topologies and network compositions. To meet the requirements for AN management systems, we propose the use of distributed approaches. Specifically, we demonstrate the validity of these approaches through three instantiations:...
We present A-GAP, a novel protocol for continuous monitoring of network state variables, which aims at achieving a given monitoring accuracy with minimal overhead. Network state variables are computed from device counters using aggregation functions, such as SUM, AVERAGE and MAX. The accuracy objective is expressed as the average estimation error. A-GAP is decentralized and asynchronous to achieve...
This paper presents a novel network context monitoring system, known as the context monitoring system (CMS), that is designed to accommodate the rapidly changing network context requirements and network context availability in dynamically (de)composing ambient networks (ANs). CMS is designed to support dynamic deployment, activation, and (re)configuration of context sensors in ANs in an efficient...
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