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    題名: Combined fuzzy-based rate management and selective power control for multimedia CDMA cellular systems
    作者: Chen, Young-Long;Wang, Jyu-Wei;Lin, Yung-Sheng;Wen, Jyh-Horng
    貢獻者: Department of Computer and Communication Engineering
    關鍵詞: Administrative data processing;Beamforming;Cellular arrays;Cellular telephone systems;Code division multiple access;Communication;Communication systems;Concurrency control;Control theory;Fuzzy control;Fuzzy inference;Fuzzy logic;Global system for mobile communications;Management;Management information systems;Mobile computing;Multimedia systems;Network protocols;Number theory;Numerical methods;Power control;Probability;Random processes;Statistical process control;Telecommunication systems;Business media;control mechanisms;Fuzzy logic controller (FLCA);In order;La-grangian Relaxation (LR);Multimedia CDMA;numerica l results;Outage probability;Power control schemes;rate management;Signal-to-interference (SIR) ratios;Springer (CO);transmission powers;Transmission rates;User capacity;wireless communication systems
    日期: 2008
    上傳時間: 2010-04-07 21:24:13 (UTC+8)
    出版者: Asia University
    摘要: control mechanisms are essential for CDMA wireless communication systems to enhance user capacity. In this paper, we propose a novel power control scheme which combines transmission rate management with power adjustments for multimedia CDMA cellular systems. In the proposed scheme, a fuzzy logic controller (FLC) is first used to dynamically infer a suitable transmission rate for each service. Then a selective power control (SPC) scheme is used to adjust the transmission power for each service in order to maintain an acceptable signal-to-interference ratio (SIR). Numerical results show that the proposed scheme outperforms the original SPC and the Lagrangian relaxation technique and power control (LRPC) methods in outage probability, average transmission rate, probability of unsuccessful transmission, and probability of changes in transmission rates. © 2007 Springer Science+Business Media, LLC.
    關聯: Wireless Personal Communications 46:269-284
    顯示於類別:[光電與通訊學系] 期刊論文


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