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- W2891447548 abstract "Cognitive femtocell has emerged as one of the promising ways to solve the indoor coverage and spectrum shortage problems in cellular networks. However, it is a challenge to motivate both macro base station ( $text{MBS}$ ) and femtocell access points ( $text{FAPs}$ ) to adopt this hybrid access policy. In this paper, we propose a systematic dynamic spectrum sharing framework for hybrid access in orthogonal frequency-division multiple-access-based cognitive macro-femtocell networks. In this framework, the $text{MBS}$ offloads some macro user equipments ( $text{MUEs}$ ) to $text{FAP}$ to improve the transmission performance and save energy. In return, the MBS leases a portion of its spectrum to $text{FAP}$ . Then, the $text{FAP}$ can use a part of spectrum for its own transmission and use another part to serve $text{MUEs}$ . We design an auction-based approach where each $text{FAP}$ receives additional $text{MUE}$ as bidders, while MBS acts as auctioneer. We formulate the dynamic resource sharing as a sum utility maximization problem. Numerical results demonstrate that both the macro and femtocell could get benefit from our framework." @default.
- W2891447548 created "2018-09-27" @default.
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- W2891447548 date "2018-11-01" @default.
- W2891447548 modified "2023-10-17" @default.
- W2891447548 title "Dynamic Spectrum Sharing for Hybrid Access in OFDMA-Based Cognitive Femtocell Networks" @default.
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- W2891447548 doi "https://doi.org/10.1109/tvt.2018.2869755" @default.
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