能效优先的用户关联与功率控制协同优化机制
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摘要
在异构蜂窝网络中,针对系统的能效提出了一种基于效用函数最大化模型的用户关联与功率控制协同优化方案,该方案表示为非线性混合整数问题。为了求得该问题的最优解,设计了一种迭代算法,首先将原问题转换为带参数的多项式形式的问题,在外层循环利用Dinkelbach方法求得最佳的能效因子,然后在内层循环分别求得最佳的用户关联矩阵和传输功率。最终实验结果表明,用户关联与功率控制协同的优化方案在能效和负载平衡方面比固定功率条件下的用户关联策略的性能更优。
This paper presented a collaborative optimization scheme based on the utility function maximization model for user association and power control to increase energy efficiency in heterogeneous cellular networks,this scheme expressed as a nonlinear and mixed integer problem. In order to found the optimal solution of this problem,it designed an iterative algorithm,first,it transformed the original problem into a polynomial problem with parameters,then,found the best energy efficiency factor by Dinkelbach method in outer layer,next,it obtained the optimal user association matrix and transmission power respectively in inner layer. At last,experimental results show that the proposed scheme has better performance in terms of energy efficiency and load balancing than the user association strategy at fixed power.
This paper presented a collaborative optimization scheme based on the utility function maximization model for user association and power control to increase energy efficiency in heterogeneous cellular networks,this scheme expressed as a nonlinear and mixed integer problem. In order to found the optimal solution of this problem,it designed an iterative algorithm,first,it transformed the original problem into a polynomial problem with parameters,then,found the best energy efficiency factor by Dinkelbach method in outer layer,next,it obtained the optimal user association matrix and transmission power respectively in inner layer. At last,experimental results show that the proposed scheme has better performance in terms of energy efficiency and load balancing than the user association strategy at fixed power.
引文
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[9] Zhou Tianqing,Liu Zhuxiong,Zhao Junhui,et al. Joint user association and power control for load balancing in downlink heterogeneous cellular networks[J]. IEEE Trans on Vehicular Technology,2018,67(3):2582-2593.
[10]Garcia-Saavedra A,Serrano P,Banchs A,et al. Energy-efficient fair channel access for IEEE 802. 11 WLANs[C]//Proc of IEEE International Symposium on a World of Wireless,Mobile and Multimedia Networks. Piscataway,NJ:IEEE Press,2011:1-9.
[11]Ye Qiaoyang,Rong Beiyu,Chen Yudong,et al. User association for load balancing in heterogeneous cellular networks[J]. IEEE Trans on Wireless Communications,2013,12(6):2706-2716.
[12] Shen Kaiming,Yu Wei. Downlink cell association optimization for heterogeneous networks via dual coordinate descent[C]//Proc of IEEE International Conference on Acoustics,Speech and Signal Processing. Piscataway,NJ:IEEE Press,2013:4779-4783.
[13] Prasad N,Arslan M,Rangarajan S. Exploiting cell dormancy and load balancing in LTE Het Nets:optimizing the proportional fairness utility[J]. IEEE Trans on Communications,2014,62(10):3706-3722.
[14]Tan C W,Chiang M,Srikant R. Fast algorithms and performance bounds for sum rate maximization in wireless networks[J]. IEEE/ACM Trans on Networking,2013,21(3):706-719.
[15]Sung C W,Leung K K. A generalized framework for distributed power control in wireless networks[J]. IEEE Trans on Information Theory,2005,51(7):2625-2635.
[2] Jiang Dingde,Zhang Peng,Lyu Zhihan,et al. Energy-efficient multi-constraint routing algorithm with load balancing for smart city applications[J]. IEEE Internet of Things Journal,2016,3(6):1437-1447.
[3] Yang Chungang,Li Jiandong,Anpalagan A,et al. Joint power coordination for spectral-and-energy efficiency in heterogeneous small cell networks:a bargaining game-theoretic perspective[J]. IEEE Trans on Wireless Communications,2016,15(2):1364-1376.
[4] Nguyen H H,Hwang W J. Distributed scheduling and discrete power control for energy efficiency in multi-cell networks[J]. IEEE Communications Letters,2015,19(12):2198-2201.
[5] Zhao Yalan,Xia Hailun,Zeng Zhimin. Grouping based power control for improving energy efficiency in dense small cell networks[C]//Proc of the 26th Annual International Symposium on Personal,Indoor,and Mobile Radio Communications. Piscataway,NJ:IEEE Press,2015:1644-1648.
[6] Zhu Yutao,Zeng Zhimin,Zhang Tiankui,et al. An energy efficient user association scheme based on cell sleeping in LTE heterogeneous networks[C]//Proc of International Symposium on Wireless Personal Multimedia Communications. Piscataway,NJ:IEEE Press,2014:75-79.
[7]苏恭超,陈彬,林晓辉,等.异构蜂窝网络中一种基于匈牙利算法的用户关联方法[J].电子科技大学学报,2017,46(2):346-351.(Su Gongchao,Chen Bin,Lin Xiaohui,et al. User association in heterogeneous cellular networks via the Hungarian method[J]. Journal of University of Electronic Science and Technology of China,2017,46(2):346-351.)
[8]苏恭超,陈彬,林晓辉,等.异构蜂窝网络中用户关联与基站功率的协同优化[J].电讯技术,2016,56(1):7-13.(Su Gongchao,Chen Bin,Lin Xiaohui,et al. Joint optimization of cell association and power control in heterogeneous cellular networks[J].Telecommunication Engineering,2016,56(1):7-13.)
[9] Zhou Tianqing,Liu Zhuxiong,Zhao Junhui,et al. Joint user association and power control for load balancing in downlink heterogeneous cellular networks[J]. IEEE Trans on Vehicular Technology,2018,67(3):2582-2593.
[10]Garcia-Saavedra A,Serrano P,Banchs A,et al. Energy-efficient fair channel access for IEEE 802. 11 WLANs[C]//Proc of IEEE International Symposium on a World of Wireless,Mobile and Multimedia Networks. Piscataway,NJ:IEEE Press,2011:1-9.
[11]Ye Qiaoyang,Rong Beiyu,Chen Yudong,et al. User association for load balancing in heterogeneous cellular networks[J]. IEEE Trans on Wireless Communications,2013,12(6):2706-2716.
[12] Shen Kaiming,Yu Wei. Downlink cell association optimization for heterogeneous networks via dual coordinate descent[C]//Proc of IEEE International Conference on Acoustics,Speech and Signal Processing. Piscataway,NJ:IEEE Press,2013:4779-4783.
[13] Prasad N,Arslan M,Rangarajan S. Exploiting cell dormancy and load balancing in LTE Het Nets:optimizing the proportional fairness utility[J]. IEEE Trans on Communications,2014,62(10):3706-3722.
[14]Tan C W,Chiang M,Srikant R. Fast algorithms and performance bounds for sum rate maximization in wireless networks[J]. IEEE/ACM Trans on Networking,2013,21(3):706-719.
[15]Sung C W,Leung K K. A generalized framework for distributed power control in wireless networks[J]. IEEE Trans on Information Theory,2005,51(7):2625-2635.