There are two main challenges for flexible service provisioning on top of today's Internet. First the end-to-end networking paradigm which is based on a service and data unaware transport, and secondly a lack of high level communication abstractions.With this thesis we approach both challenges. To address the first point we propose a methodology to integrate the Network Provider into the process of service provisioning. The introduced cooperative service provisioning (CSP) enables an interaction between Service Provider, Network Provider and Client. CSP can be applied in classical Provider as well as novel Peerto-Peer scenarios.To address the second point, we adopt a Service Overlay approach. A new method based on the extension of Distributed Hash Tables (DHTs) is proposed to realise a distributed control plane for a decentral and reactive creation of Service Overlays. To archive this, a methodology to reduce Service Overlay related routing problems to search problems was developed. With regard to the required Quality of Service (QoS) measurements, the thesis focuses on scalable and time efficient estimation techniques. As a result, two new delay prediction schemes have been developed which improve estimation accuracy when compared to the state of the art.Furthermore, a novel approach to bandwidth estimation is investigated. It combines methods from landmark based delay estimation with a transformation step and has favourable estimation accuracy.
Abstract. IP networks are now well established. However, control, management and optimization schemes are provided in a static and basic way. Network control and management schemes using an autonomy based technology offer a new way to master quality of service, security and mobility management. This new paradigm allows a dynamic and intelligent control of the equipment in a local manner, a global network control in a cooperative manner, a more powerful network management, and a better guaranty of all vital functionalities like end to end quality of service and security. In this paper, we provide a way to implement such a paradigm through the use of the agent and multi agent concept. A testbed of an architecture based on autonomous network equipment has been developed. This autonomous architecture is able to optimize the quality of service through the networks.
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