OFDMA系统随机服务模型及呼叫接纳控制策略的研究
doi: 10.3724/SP.J.1146.2005.01648
Research on Stochastic Model and Call Admission Control Strategy of Adaptive OFDMA System
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摘要: 该文在分析OFDMA系统容量的基础上，提出了适用于自适应OFDMA系统的随机服务模型，即M| M| m| n马尔可夫排队模型，根据这个模型，我们提出了基于系统吞吐量和用户QoS要求的呼叫接纳控制策略。理论分析和仿真结果表明，当系统中只有FTP业务时，M| M| m| n模型与自适应OFDMA系统的随机服务特征非常相似，应用这个模型对系统的阻塞概率和文件的服务时间进行定量分析，其结果与实际系统的性能基本吻合。Abstract: Based on the analysis of OFDMA system capacity, a stochastic model, M| M| m| n Markov queue model, is proposed. According to the model, the call admission control strategy is presented, where the number of call connections into the network is limited by the system throughput and users QoS requirements. The results demonstrate that the M| M| m| n model is suitable to adaptive OFDMA system supporting for FTP service, and the curves of blocking probability verse arrival rate and average service time verse arrival rate achieved by it coincide with that provided by the simulating results.
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Berezdivin R, Breinig R, and Topp R. Next-generation wireless communications concepts and technologies. IEEE Commun. Mag., 2002, 40(3): 108-116.[2]Zhang Ying Jun and Letaief K B. Multiuser adaptive subcarrier-and-bit allocation with adaptive cell Selection for OFDM systems[J].IEEE Transactions on Wireless Communications.2004, 3(5):1566-1575[3]Li Guo-qing and Liu Hui. Dynamic resource allocation with finite buffer constraint in broadband OFDMA networks[J].Wireless Communications and Networking, 2003. WCNC 2003. 2003 IEEE, 16-20 March.2003, vol.2:1037-1042[4]Li Lei and Niu Zhi-sheng. A resource allocation and admission control scheme for multimedia services in broadband wireless communication systems. 2005 Asia-Pacific Conference on Communications, Perth, Western Australia, 3-5 October 2005: 679-683.[5]Chou C T and Shin K G. Analysis of adaptive bandwidth allocation in wireless networks with multilevel degradable quality of service[J].IEEE Trans. on Mobile Comp.2004, 3(1):5-17[6]Andrea Goldsmith. Wireless Communications. Stanford University, 2005, chapter 14.[7]Proakis J G. Digital Communications. Third Edition, 北京: 电子工业出版社, 2002, chapter 5.[8]佟学俭, 罗涛. OFDM 移动通信技术原理与应用. 北京: 人民邮电出版社, 2003: 36-45.[9]3GPP. TR 25.892: Feasibility study for orthogonal frequency division multiplexing (OFDM) for UTRAN enhancement. Version 6.0.0, June/2004.[10]胡细宝, 孙洪祥. 概率论与随机过程. 北京: 北京邮电大学出版社, 2001, 第3章.[11]陆传赉. 排队论. 北京: 北京邮电大学出版社, 1994, 第2章.[12] Frogner B. Performance monitoring, prediction and optimization focused on user experience. www.netpredict.com/pdfs_all/WhiteQoSPaper.pdf. -
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