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• W2034677042 abstract "Distributed spectrum sharing with minimum quality of service (QoS) requirement and interference temperature (IT) constraint is studied in this paper. This problem can be formulated as a non-convex optimization problem with conflicting constraints. To make solutions to this problem feasible, random access and power control are jointly considered. The challenges in solving this problem arise from the coupling in utility functions, the conflicting constraint sets, and coupled control variables. Moreover, there is no centralized controller or base station in networks to coordinate unlicensed users' transmission and protect active users' QoS under IT constraint. By introducing variable substitution and transformation, we derive a distributed random access and power control algorithm that can achieve global optimal solution to the original problem. Convergence of the algorithm is proven theoretically. Simulation results demonstrate that both QoS guarantee and interference avoidance can be achieved even with channel gain variations." @default.
• W2034677042 created "2016-06-24" @default.
• W2034677042 creator A5033047627 @default.
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• W2034677042 date "2008-11-01" @default.
• W2034677042 modified "2023-09-27" @default.
• W2034677042 title "Distributed power control and random access for spectrum sharing with QoS constraint" @default.
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• W2034677042 doi "https://doi.org/10.1016/j.comcom.2008.08.016" @default.
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