CSP, Cooperative Service Provisioning Using Peer-to-Peer Principles

Abstract

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.

Towards Autonomic Service Control in Next Generation Networks

“…In contrast, for the proposed approach it is also required to incorporate control, verify and measurement functionality into a search process for chains of keys. We therefore have to extend a DHT towards a new DHT+++ [13] principle supporting:…”

“…For more information about the proposed P2P based service specific self configuration strategy, the DHT+++ principle as well as an analysis of the underlying problem space we refer to [13].…”

“…In this paper self-* denotes self-configuring, self-organizing, self-managing and self-repairing. We will concentrate on an overall picture containing the required core concepts, and for a more detailed discussion of technical aspects we refer to [13] [14]. As one result, the aspired approach would change the way how subscriber, network operator and service provider interact in a beneficial way for all parties.…”

A decentralised service composition approach for peer-to-peer video delivery

“…One branch of Overlay related research concentrates on Overlay based Service Composition problems with a strong focus on network and QoS specific issues of the composition process [1][2][3][4][5][6]. To illustrate the addressed problem space, in Fig.…”

“…Using such service composition principles, a composed multimedia service is realised by interconnecting a Media Server, a set of media processors and a Media Client using an Overlay principle. In this paper we describe a cooperative service provisioning principle (CSP) [1] which is designed to address Overlay based service composition in P2P scale scenarios. The core building block of CSP is a Distributed Hash Table (DHT) extended with a service specific indexing principle and a recursive search algorithm including QoS verification.…”