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Theil Utility Based multi-device cooperation Mechanism for Service Quality Equilibrium in Ubiquitous Stub Environments

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China Communications 2014年第6期11卷 140-150页

作者： RUI Lanlan MU Nan GUO Shaoyong QIU Xuesong ZHANG Jie State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications AsiaInfo-Linkage Inc.

An approach to make heterogeneous devices cooperate with each other to provide ubiquitous service remains a longstanding challenge in ubiquitous environments. In addition, when multi-user request ubiquitous services simultaneously, the arbitrariness in resource allocation process easily leads to non-equilibrium of qualities of multiuser's services. Thus, How to design an effective heterogeneous devices cooperation mechanism that meet the QoS requirements and also equilibrate QoS among multi-user's services becomes a very tough problem. In the paper, Equilibrium Index and Theil Utility function are imported to establish a multidevice equilibrium cooperation model, which is benefit for resource allocation in ubiquitous environments. Then a Theil-Equilibrium based cooperation Mechanism for multi-service is proposed. Firstly, in order to simplify calculating, a dimensionless processing is introduced. After that, a cooperation approach with Theil-Utility Heuristic algorithm is designed to choose the best solution for the simplified model. At last, the mechanism is simulated in a smart home scenario. The simulation results show that this mechanism outperforms non-equilibrium method by improving almost 40% in internal equilibrium with just reducing 0-2% in the total utility ofall the requested ubiquitous services. These data show that the proposed mechanism performs well in equilibrating qualities of multi-user's ubiquitous services.

关键词： ubiquitousstub environments cooperation among multi-device QoS equilibrium equilibrium index theil utility

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