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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2016.12
- 수록면
- 704 - 715 (12page)
이용수
초록· 키워드
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In this paper, we explore a low-complex bandwidth allocation (BA) scheme with multi-level serviceguarantees in VLC-OFDM systems. Effective capacity theory, which evaluates wireless channel capacityfrom a novel view, is utilized to model the system capacity under delay QoS constraints of the link layer.
Since intensity modulation of light is used in the system, problems caused by frequency selectivity canbe neglected. Then, the BA problem can be formulated as an integer programming problem and it is furtherrelaxed and transformed into a concave one. Lagrangian formulation is used to reformulate the concaveproblem. Considering the inefficiency of traditional gradient-based schemes and the demand for distributedimplementation in local area networks, we localize the global parameters and propose a quasi-distributedquadratic allocation algorithm to provide two-level service guarantees, the first level is QoS oriented, andthe second level is QoE oriented. Simulations have shown the efficient performance of the proposedalgorithm. The users with more stringent QoS requirements require more subcarriers to guarantee theirstatistical delay QoS requirements. We also analyze the effect of subcarrier granularity on the aggregateeffective capacity via simulations.
목차
등록된 정보가 없습니다.
참고문헌 (23)
참고문헌 신청
A. T. Hussein / 2015 / Mobile multi-gigabit visible light communication system in realistic indoor environment / J. Lightwave Technol 33:3293~3307
Z. Wang / 2015 / Full-duplex MAC protocol based on adaptive contention window for visible light communication / IEEE J. Opt. Commun. Netw 7:164~171
J. Dang / 2012 / Comparison of optical OFDMIDMA and optical OFDMA for uplink visible light communications / Proc. 2012 International Conference on Wireless Communications and Signal Processing 7363:1~6
Y. S. Cho / 2010 / Wireless Communications with MATLAB / Wiley Press
윤경수 / 2014 / Optimal Signal Amplitude of Orthogonal Frequency-Division Multiplexing Systems in Dimmable Visible Light Communications / Current Optics and Photonics 18(5):459~465
Z. Wang / 2015 / Full-duplex MAC protocol based on adaptive contention window for visible light communication / IEEE J. Opt. Commun. Netw 7:164~171
J. Dang / 2012 / Comparison of optical OFDMIDMA and optical OFDMA for uplink visible light communications / Proc. 2012 International Conference on Wireless Communications and Signal Processing 7363:1~6
Y. S. Cho / 2010 / Wireless Communications with MATLAB / Wiley Press
윤경수 / 2014 / Optimal Signal Amplitude of Orthogonal Frequency-Division Multiplexing Systems in Dimmable Visible Light Communications / Current Optics and Photonics 18(5):459~465
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