46 research outputs found
On the simulation of grid market coordination approaches
No full textGrid computing has recently become an important paradigm for managing computationally demanding applications, composed of a collection of services. The dynamic discovery of services, and the selection of a particular service instance providing the best value out of the discovered alternatives, poses a complex multi-attribute n:m allocation decision problem, which is often solved using a central resource broker. However, decentralized approaches to this service allocation problem represent a much more flexible alternative, thus promising improvements in the efficiency of the resulting negotiations and service allocations. This paper compares centralized and decentralized service allocation mechanisms in Grid market scenarios according to a defined set of metrics. © Springer Science+Business Media B.V. 2007
The BabelNEG System - A Protocol-generic Infrastructure for Electronic SLA Negotiations in the Internet of Services
No full textVisions of the next-generation Internet of Services are driven by digital resources traded on a global scope. For the resulting economic setting, automated on-line techniques for handling services and resources themselves, for advertising and discovering as well as for the on-the-fly negotiation of proper terms for their use are needed. Hence, a flexible infrastructure for the respective management of services and associated service level agreements is mandatory. This thesis presents the results of my dissertation project. They comprise a service infrastructure, able to support the structured discovery and protocol-generic negotiation of electronic service level agreements (SLAs) and thus services themselves. (...)Sowohl die Wissenschaft als auch die industrielle Praxis sehen elektronische Dienste und Ressourcen, die auf globalen digitalen Marktplätzen gehandelt werden als fundamentale Konzepte des zukünftigen Internets der Dienste an. In einem solchen ökonomischen Umfeld werden Mechanismen zum automatisierten Management der beteiligten Ressourcen, zum Veröffentlichen und Auffinden, wie auch zum direkten Verhandeln dieser digitalen Güter essentiell. In dieser Dissertationsschrift werden die Ergebnisse meiner Arbeit an diesem Forschungsproblem dargestellt. Ich beschreibe die von mir entwickelte Softwareinfrastruktur, die ein strukturiertes Veröffentlichen und Protokoll-generisches Verhandeln elektronischer Dienstverträge (Service Level Agreements, kurz SLAs), und damit auch der Dienste selbst, ermöglicht. (...
A Proposal for a Web Services Agreement Negotiation Protocol Framework
No full textBamberg, Univ., Dipl.-Arb., 2006The WS-Agreement Standard as defined in the current proposal does not accommodate negotiation between service provider and requesters to yield an agreement. It is limited to simple offers and acceptances. However, negotiations between service providers and service consumers beyond the basic mechanism are required and are also part of the charter of the GRAAP working group. There are many mechanisms for negotiating agreements between parties for different purposes, having different sets of participants, different economic properties, different interactions patterns, and different information requirements to enter the interaction. Given the generality of the WS-Agreement scope, supporting a single negotiation mechanism would not satisfy the requirements of different application scenarios. Hence, the objective of this thesis is to devise a proposal to extend the WS-Agreement specification to facilitate the integration of arbitrary negotiation protocols into the WS-Agreement interaction. This includes facilities to enable a party to advertise the negotiation protocol it supports, the role that it can take in this protocol, expectations on other roles in the negotiation, and other meta-information that is necessary to start an interaction. This thesis analyzes the scope of negotiation protocols relevant for service level agreement establishment, derives a data structure for negotiation protocol meta-data, a protocol to exchange meta-data and initiate a negotiation protocol, and obtaining the result of the negotiation, the agreement. The new functionality extends the current WS-Agreement specification seamlessly. The thesis demonstrates the viability of the approach using scenarios of specific negotiation mechanisms
From Service Markets to Service Economies – An infrastructure for protocol-generic SLA negotiations
No full textThe BabelNEG System - A prototype Infrastructure for protocol-generic SLA Negotiations
No full textVisions of the next-generation Internet of Services are drivenby digital resources traded on a global scope. For the resultingeconomic setting, automated on-line techniques forhandling services and resources themselves, for advertisingand discovering as well as for the on-the-y negotiation ofproper terms for their use are needed. Hence, a exible infrastructurefor the respective management of services andassociated service level agreements is mandatory.In this paper we present a novel approach for such an infrastructure,building on software-agent technology and anexpressive but still machine manageable protocol descriptionlanguage, capable of specifying a multitude of dierentnegotiation protocols. It supports the discovery of serviceswith appropriate SLA negotiation styles as well as the actualSLA negotiations based on the chosen protocol descriptiondocuments
Multiagentensysteme: Dezentralität als Entwurfs-, Organisations- und Betriebsprinzip für Informationssysteme: Coping with global Information Systems
No full textAnforderungserhebung in der öffentlichen Verwaltung - Ein Vorschlag für einen strukturierten Erhebungsprozess und die resultierende Anforderungsdokumentation
No full textDie Anforderungserhebung ist eine der entscheidenden Phasenerfolgreicher Softwareentwicklung und birgt im Kontexteines oentlichen Organs besondere Herausforderungen.Neben historisch gewachsenen IT-Landschaften sind in denverantwortlichen Entscheidungsgremien oentlicher Verwaltungenhochst unterschiedliche Expertisen im Hinblick aufdie Softwareentwicklung anzutreen. Ein Anforderungsdokumentmuss diesen Umstand berucksichtigen und fur alleBeteiligten verstandlich sein; nichtsdestotrotz muss dieinhaltliche Qualitat dokumentierter Anforderungen gewahrleistetsein. Der vorliegende Beitrag adressiert diese Herausforderungenund stellt ein Verfahren zur strukturierten Anforderungserhebungim oentlichen Kontext vor. Dabei werdenunter Verwendung sowohl naturlichsprachlicher als auchmodellbasierter Anforderungsdokumentation Vorschlage zurStrukturierung des Anforderungsdokumentes sowie der syntaktischenMuster einzelner Anforderungen unterbreitet. Eswird zudem die Anwendung und Ergebnisse des vorgestelltenVerfahrens im Rahmen des Projektes der UniversitatBayreuth zur Konsolidierung der universitaren Informationssystemedargelegt
ON COMPUTER SIMULATION AS A COMPONENT IN INFORMATION SYSTEMS RESEARCH
No full textComputer simulation is widely regarded as a useful activity during various phases of research. However, depending on its context, the meaning, definition, and focus of the term can vary: In traffic planning, for example, simulation is used to determine useful configurations of a road network, thus focusing on the environment. An entirely different perspective is used within multi-agent systems. In such settings, the environment of the agents remains static, while the interesting research questions concern the behavior of the agents themselves. The research focuses on the microscopic level and the resulting emergent behavior. This article puts such diverse meanings in the context of a research process that treats descriptive and prescriptive research as two sides of the same coin. We develop a framework to classify different types of simulation, based on the actual research activity they are intended to be used for. Two case studies supplement the framework
Socio-Economic Mechanisms to Coordinate the Internet of Services: The Simulation Environment SimIS
No full textVisions of 21st century information systems show highly specialized digital services and resources, which interact continuously and with a global reach. Especially with the emergence of technologies, such as the semantic web or software agents, intelligent services within these settings can be implemented, automatically communicating and negotiating over the Internet about digital resources without human intervention. Such environments will eventually realize the vision of an open and global Internet of Services (IoS). In this paper we present an agent-based simulation model and toolkit for the IoS: 'SimIS - Simulating an Internet of Services'. Employing SimIS, distributed management mechanisms and protocols can be investigated in a simulated IoS environment before their actual deployment.Multi-Agent Simulation, Internet, Simulation Tools
