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Charging Service Compositions in a Service-Oriented Peer-to-Peer Network Gerke, Jan peer-to-peer middleware service negotiation service level agreements service composition service charging Today, peer-to-peer (P2P) networks, e.g., filesharing networks like Gnutella, are specialised towards specific purposes. This shortcoming is addressed by introducing a new middleware for P2P networks. The middleware supports the deployment and use of services inside a P2P network. The middleware can be adapted through plug-ins. It includes service negotiation mechanisms which support the creation of legally enforceable service level agreements (SLAs) by using strong identities. This allows to reliably compose services into new value-added services. The business model of service composers has been investigated. The question of how to charge for such service compositions is addressed by introducing an event-based charging model. The events are to be applied in a service consumer's utility function as well as service composers' and service providers' tariff functions. Finally, the relation of these functions determines the profits of a service composer. Schloss Dagstuhl – Leibniz-Zentrum für Informatik Jan Gerke 2005 Is Part Of Dagstuhl Seminar Proceedings, Volume 4411, Service Management and Self-Organization in IP-based Networks (2005) InProceedings Text doc-type:ResearchArticle publishedVersion application/pdf doi:10.4230/DagSemProc.04411.7 urn:nbn:de:0030-drops-906 https://drops.dagstuhl.de/entities/document/10.4230/DagSemProc.04411.7 eng https://creativecommons.org/licenses/by/4.0/legalcode