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: 2010-04-07T13:24:13Z 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.
