<P>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 ( <TEX>$\text{MBS}$</TEX>...
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https://www.riss.kr/link?id=A107467432
2018
-
SCI,SCIE,SCOPUS
학술저널
10830-10840(11쪽)
0
상세조회0
다운로드다국어 초록 (Multilingual Abstract)
<P>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 ( <TEX>$\text{MBS}$</TEX>...
<P>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 ( <TEX>$\text{MBS}$</TEX>) and femtocell access points ( <TEX>$\text{FAPs}$</TEX>) 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 <TEX>$\text{MBS}$</TEX> offloads some macro user equipments ( <TEX>$\text{MUEs}$</TEX>) to <TEX>$\text{FAP}$</TEX> to improve the transmission performance and save energy. In return, the MBS leases a portion of its spectrum to <TEX>$\text{FAP}$</TEX>. Then, the <TEX>$\text{FAP}$</TEX> can use a part of spectrum for its own transmission and use another part to serve <TEX>$\text{MUEs}$</TEX>. We design an auction-based approach where each <TEX>$\text{FAP}$</TEX> receives additional <TEX>$\text{MUE}$</TEX> 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.</P>
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