Médiation flexible dans un système pair-à-pair. (Flexible mediation in peer-to-peer systems)
نویسنده
چکیده
We are interested in open and dynamic distributed information systems, which put into action a large number ofautonomous and heterogeneous information systems. In such context, a peer can play initiator’s and provider’sroles at the same time. The mediator’s role consists in making link between initiators and providers, allocatingqueries to more relevant providers. Initiators’ and providers’ preferences can be antagonistic, the firsts favour-ing pertinent replies whereas seconds privileging to handle some queries. Often, mediators acknowledge onlyone point of view among these of initiator and provider.This thesis proposes a mecanism of flexible mediation which take in account the two points of view, in orderto guarantee satisfaction for all actors of system. On the one hand, the providers make monetary offers whichrepresent their interests in the request. On the other hand, the interest that an initiator may have for one oranother provider who treats the request is linked to the notion of quality. These two measure are the basis ofselection step of our flexible mediation. Moreover, it can permit to requisition providers that do not want totreat query when it is necessary. Mediation combines a social aspect with an economic aspect via the use of acurrency. We examine the satisfaction established by the peers in the system. We also study the properties whichresult from microeconomy. Through experimentation, we compare flexible mediation with other processes invariant contexts with the aim to determining the optimum usage conditions.
منابع مشابه
Découverte de mappings dans un système pair-à-pair sémantique : application à SomeRDFS. (mapping discovery in a semantic peer to peer system : application to SomeRDFS)
متن کامل
Perfect simulation of stochastic hybrid systems with an application to peer to peer systems
In this paper we present a rather general hybrid system made of deterministic differential equations and random discrete jumps. We then show how to construct a simulation of such a stochastic hybrid system that provides perfect samples of its asymptotic behavior. The applicability of the method is illustrated by showing how this framework can be used to model the Squirrel peer to peer system an...
متن کاملWooki: A P2P Wiki-Based Collaborative Writing Tool
Wiki systems are becoming an important part of the information system of many organisations and communities. This introduce the issue of the data availability in case of failure, heavy load or off-line access. We propose to replicate wiki pages across a P2P network of Wiki engines. We address the problem of consistency of replicated wiki pages in the context of a P2P Wiki system. In this paper,...
متن کاملMédiation de données sémantique dans SenPeer, un système pair-à-pair de gestion de données
The so-called information society needs an efficient access to the available information which is oftenheterogeneous and distributed. In order to make information sharing efficient, some technical solutionshave been proposed. The concept of distributed database has been introduced in order to organize acollection of multiple and logically bound databases spread across a computer net...
متن کاملUn processus de médiation flexible dans un système d'informations distribué
We consider distributed informations systems that are open, dynamic and provide access to large numbers of distributed, heterogeneous and autonomous informations sources. Our problem consists in providing more pertinent informations to the users. Also, informations providers want to obtain requests corresponding as well as possible to their waitings. This part of mediation in general is few tre...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2007