在协作中继OFDMA(OFDMA/Relay)系统中,应用最大化最小(maxmin)准则提出一种公平的OFDMA/Relay子载波和功率联合分配算法。该算法以最大化网络中当前速率最小用户的数据速率为目标,能够为尽力而为(best effort)用户业务提供一致的数据速率(并满足用户业务对误码率的需求),有效地避免了“饥饿”现象,即与基站、中继站信道条件较差的用户业务出现数据传输速率接近于0的现象的发生。
Abstract
To acquire a fair subcarriers and power sharing in the multiuser RelayAided OFDMA (OFDMA/Relay) networks, a maxmin rule based resource allocation scheme is proposed in this paper. Using the maxmin rule, the resource allocation problem is modeled as an optimization problem to maximize the minimum of all users’ data rates. As the result, the identical data rates of the best effort user traffics’ are obtained in the network while their BER (bit error rate) constraints are satisfied. Simulation results show, by using the proposed OFDMA/Relay resource allocation scheme, the starvation phenomenon, i.e., the date rate of the user stations who have poor channel conditions with the Base Station and the Relay Station are almost zero is avoided.
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参考文献
〓〖ZK（#〗Doppler K, Redana S, Micha Wodczak. Dynamic Resource Assignment and Cooperative Relaying in Cellular Networks: Cncept and Prformance Asessment . EURASIP J on Wireless Communications and Networking, 2009, 10(1): 114.
〓Pabst R, Walke B H, Schultz D C. Relaybased Deployment Concepts for Wireless and Mobile Broadband Radio . IEEE Communications Magazine, 2004, 12(4): 8089.
〓Zhang Guopeng, Zhang Hailin, Zhao Liqiang. Fair Resource Sharing for Cooperative Relay Networks Using Nash Bargaining Solutions . IEEE Communication Letters, 2009，13(6): 381383.
〓Genc V, Murphy S, Karl Richer. IEEE 802.16j Relay Based Wireless Access Betworks: An Overview . IEEE Wireless Communications, 2008, 22(13): 5663.
〓Zhang Xing, Chen Shuping. Multiuser Radio Resource Allocation for Multiservice Transmission in OFDMAbased Cooperative Relay Networks . EURASIP J on Wireless Communications and Networking, 2009,11(1): 114.
〓Zhao Y, Adve R, Teng J L. Improving Amplifyandforward Relay Networks: Optimal Power Allocation Versus Selection . IEEE Transactions on Wireless Communications, 2007, 6(8): 31143123.
〓Bo Gui, Leonard J, Cimini Jr. Bit Loading Algorithms for Cooperative OFDM Systems . EURASIP J on Wireless Communications and Networking, 2009, 22(1): 114.
〓Zhu Han, Himsoon T. Resource Allocation for Multiuser Cooperative OFDM Networks: Who Helps Whom and How to Cooperate . IEEE Transactions on Vehicular Technology, 2009, 58(5): 23782391.
〓Li Guoqing, Liu Hui. Resource Alocation for OFDMA Rlay Ntworks with Firness Constraints . IEEE J of Selected Area of Communications, 2006, 24(11): 20612069.〖ZK）〗
〖KG*2〗〖ZK（#〗Zhu Han, Zhu Ji, Ray Liu K J. Fair Multiuser Channel Allocation for OFDMA Networks Using Nash Bargaining Solutions and Coalitions . IEEE Transactions on Communication, 2005, 53(8): 13661376.
〖KG*2〗Chung S T, Goldsmith A J. Degrees of Freedom in Adaptive Modulation: A Unified View . IEEE Transactions on Communication, 2001, 49(9): 15611571.
〖KG*2〗Boyd S, Vandenberghe L. Convex Optimization. London: Cambridge University Press, 2004.
〖KG*2〗Hasna M O, Alouini M S. Optimal Power Allocation for Relayed Transmissions over Rayleighfading Channels . IEEE Trans on Wireless Comm, 2004, 3(6): 19992004.
〖KG*2〗Rappaport T S. Wireless Communications: Principles and Practice. :Prentice Hall PTR, 2002.〖ZK)〗
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