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- W2783199706 abstract "Hybrid cognitive radio (CR) relays serve cellular users in a two-hop fashion, which jointly utilize both licensed and unlicensed radio spectrums to significantly increase the system capacity. User equipments (UEs) need to be actively associated with the macro-cell BS or CR relays having a more lightly loaded spectrum if the quality of services (QoS) can be guaranteed. To this end, this paper investigates optimal user association for load balancing problem in cellular network with hybrid cognitive radio relays. Firstly, we propose a multi-objective user association optimization model to balance the loads among different tiers while reducing the total resource occupancy. Then, this multiobjective problem is converted into a single one by the linear weighing-sum method and a genetic algorithm is introduced to solve it. The numerical simulation results show that our proposed scheme can obtain more balanced resources occupation, better throughput performance, and lower blocking rate compared with the heuristic and max-power strategies." @default.
- W2783199706 created "2018-01-26" @default.
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- W2783199706 date "2017-11-01" @default.
- W2783199706 modified "2023-10-18" @default.
- W2783199706 title "User association for load balancing in cellular network with hybrid cognitive radio relays" @default.
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- W2783199706 doi "https://doi.org/10.23919/cnsm.2017.8256007" @default.
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