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In this paper we consider a random access system where each user can be in two modes of operation, has a packet or not and the set of users which have a packet is available to a shared medium. We propose an evolving coalitional game theory to analyze the system outcomes. Unlike classical coalitional approaches that assume that coalitional structures are fixed and formed with cost-free, we explain...
A controllable delegation model which is suitable for opening environment, based on usage and trustworthiness (UTCDM) is provided. The new model integrates the merits of both UCON (usage control model) and trust management(TM). In this paper, weight directed graph is used to describe the delegation relationship. An approach for controlling the depth of delegation focusing on the objects and the rights...
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