Details

Autor(en) / Beteiligte

• Deng, Qingyong
• Li, Zhetao
• Chen, Jiabei
• Zeng, Fanzi
• Wang, Hui-Ming
• Zhou, Liang
• Choi, Young-June

Titel

Dynamic Spectrum Sharing for Hybrid Access in OFDMA-Based Cognitive Femtocell Networks

Ist Teil von

• IEEE transactions on vehicular technology, 2018-11, Vol.67 (11), p.10830-10840

Ort / Verlag

New York: IEEE

Erscheinungsjahr

2018

Link zum Volltext

• IEEE_Xplore

Quelle

IEEE Electronic Library (IEL)

Beschreibungen/Notizen

• 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 (<inline-formula> <tex-math notation="LaTeX">\text{MBS}</tex-math></inline-formula>) and femtocell access points (<inline-formula> <tex-math notation="LaTeX">\text{FAPs}</tex-math></inline-formula>) 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 <inline-formula> <tex-math notation="LaTeX">\text{MBS}</tex-math></inline-formula> offloads some macro user equipments ( <inline-formula><tex-math notation="LaTeX">\text{MUEs}</tex-math></inline-formula>) to <inline-formula> <tex-math notation="LaTeX">\text{FAP}</tex-math></inline-formula> to improve the transmission performance and save energy. In return, the MBS leases a portion of its spectrum to <inline-formula><tex-math notation="LaTeX">\text{FAP} </tex-math></inline-formula>. Then, the <inline-formula><tex-math notation="LaTeX">\text{FAP}</tex-math> </inline-formula> can use a part of spectrum for its own transmission and use another part to serve <inline-formula> <tex-math notation="LaTeX">\text{MUEs}</tex-math></inline-formula>. We design an auction-based approach where each <inline-formula><tex-math notation="LaTeX">\text{FAP}</tex-math></inline-formula> receives additional <inline-formula> <tex-math notation="LaTeX">\text{MUE}</tex-math></inline-formula> 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.