两用户非正交多址接入的最优时延均衡和功率控制方法
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摘要
该文针对采用非正交多址接入(NOMA)技术的两用户单小区网络,考虑信道衰落的随机性和业务到达的动态性,以均衡用户排队时延并最大化网络总吞吐量为目标,构建了资源管理的随机优化问题。基于李雅普诺夫优化方法,推导了随机优化问题的最优解的闭式表达式,并提出一种低复杂度的联合时延均衡和功率控制的最优资源管理方法。对比了采用NOMA时的次优资源管理方法与采用时分多址接入方法时的最优资源管理方法,仿真结果表明所提方法能够显著提升网络性能。
A two-user single cell network employing Non-Orthogonal Multiple Access(NOMA) technique is studied. Accounting for time-varying channel fading and dynamic traffic arrival, a stochastic optimization issue is formulated, which aims to balance the queue delay of users and maximize the network total throughput.Based on Lyapunov optimization method, the closed-form optimal solution of the stochastic optimization issue is derived, and a low-complexity optimal delay equilibrium and power control method is proposed. The method is compared with a NOMA scheme using a non-optimal resource management method and a Time Division Multiple Access(TDMA) scheme with an optimal resource management method. Simulation results show that the proposed method can significantly improve network performance.
A two-user single cell network employing Non-Orthogonal Multiple Access(NOMA) technique is studied. Accounting for time-varying channel fading and dynamic traffic arrival, a stochastic optimization issue is formulated, which aims to balance the queue delay of users and maximize the network total throughput.Based on Lyapunov optimization method, the closed-form optimal solution of the stochastic optimization issue is derived, and a low-complexity optimal delay equilibrium and power control method is proposed. The method is compared with a NOMA scheme using a non-optimal resource management method and a Time Division Multiple Access(TDMA) scheme with an optimal resource management method. Simulation results show that the proposed method can significantly improve network performance.
引文
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[2]COVER T.Broadcast channels[J].IEEE Transactions on Information Theory,1972,18(1):2-14.doi:10.1109/TIT.1972.1054727.
[3]TSE D and VISWANATH P.Fundamentals of Wireless Communication[M].Cambridge:Cambridge University Press,2005.
[4]BENJEBBOVU A,LI Anxin,SAITO Y,et al.System-level performance of downlink NOMA for future LTEenhancements[C].2013 IEEE Globecom Workshops(GCWkshps),Atlanta,2013:66-70.doi:10.1109/GLOCOMW.2013.6824963.
[5]OVIEDO J A and SADJADPOUR H R.A fair power allocation approach to NOMA in multiuser SISO systems[J].IEEE Transactions on Vehicular Technology,2017,66(9):7974-7985.doi:10.1109/TVT.2017.2689000.
[6]WEI Zhiqiang,NG D W K,YUAN Jinhong,et al.Optimal resource allocation for power-efficient MC-NOMA with imperfect channel state information[J].IEEE Transactions on Communications,2017,65(9):3944-3961.doi:10.1109/TCOMM.2017.2709301.
[7]FANG Fang,ZHANG Haijun,CHENG Julian,et al.Energy-efficient resource scheduling for NOMA systems with imperfect channel state information[C].2017 IEEEInternational Conference on Communications(ICC),Paris,2017:1-5.doi:10.1109/ICC.2017.7996360.
[8]CHOI J.Joint rate and power allocation for NOMA with statistical CSI[J].IEEE Transactions on Communications,2017,65(10):4519-4528.doi:10.1109/TCOMM.2017.2720176.
[9]ZHANG Yi,WANG Huiming,ZHENG Tongxing,et al.Energy-efficient transmission design in non-orthogonal multiple access[J].IEEE Transactions on Vehicular Technology,2017,66(3):2852-2857.doi:10.1109/TVT.2016.2578949.
[10]LEI Lei,YUAN Di,and V?RBRAND P.On power minimization for non-orthogonal multiple access(NOMA)[J].IEEE Communications Letters,2016,20(12):2458-2461.doi:10.1109/LCOMM.2016.2606596.
[11]SHI Lanjie,LI Bo,and CHEN Haihua.Pairing and power allocation for downlink nonorthogonal multiple access systems[J].IEEE Transactions on Vehicular Technology,2017,66(11):10084-10091.doi:10.1109/TVT.2017.2748145.
[12]XU Bingyu,CHEN Yue,CARRIóN J R,et al.Resource allocation in energy-cooperation enabled two-tier NOMAHetNets toward green 5G[J].IEEE Journal on Selected Areas in Communications,2017,35(12):2758-2770.doi:10.1109/JSAC.2017.2726398.
[13]ZHAO Jingjing,LIU Yuanwei,CHAI K K,et al.Resource allocation for non-orthogonal multiple access in heterogeneous networks[C].2017 IEEE International Conference on Communications(ICC),Paris,2017:1-6.doi:10.1109/ICC.2017.7997327.
[14]MI Xiang,ZHAO Ming,XIAO Limin,et al.Delay-aware resource allocation and power control for device-to-device communications[C].2015 IEEE WCNC Wkshps,New Orleans,USA,2015:311-316.doi:10.1109/WCNCW.2015.7122573.
[15]SHENG Min,LI Yuzhou,WANG Xijun,et al.Energy efficiency and delay tradeoff in device-to-device communications underlaying cellular networks[J].IEEEJournal on Selected Areas in Communications,2016,34(1):92-106.doi:10.1109/JSAC.2015.2471395.
[16]LI Jiandong and HUANG Sheng.Delay-aware power control for D2D communication with successive interference cancellation and hybrid energy source[J].IEEE Wireless Communications Letters,2017,6(6):806-809.doi:10.1109/LWC.2017.2744625.
[17]HUANG Sheng,LIANG Ben,and LI Jiandong.Distributed interference and delay aware design for D2D communication in large wireless networks with adaptive interference estimation[J].IEEE Transactions on Wireless Communications,2017,16(6):3924-3939.doi:10.1109/TWC.2017.2690280.
[18]NEELY M J.Stochastic Network Optimization with Application to Communication and Queueing Systems[M].San Rafael,CA:Morgan&Claypool,2010.
[19]BOYD S and VANDENBERGHE L.Convex Optimization[M].Cambridge,England:Cambridge University Press,2004.