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Joint User Association and Spectrum Allocation for Small Cell Networks With Wireless Backhauls

机译:带有无线回程的小型蜂窝网络的联合用户协会和频谱分配

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摘要

Heterogenous networks and massive MIMO can significantly enhance spectral and energy efficiencies of wireless networks and have recently attracted lots of attention. In this letter, we investigate joint user association and spectrum allocation to further improve spectral efficiency for massive MIMO enabled heterogeneous networks with full-duplex wireless backhauls. The optimization problem is formulated as a mixed-integer nonlinear programming problem, and therefore, is nonconvex and combinational. To solve the problem efficiently, the original optimization problem is divided into two subproblems that can be solved with low-computational-complexity methods. The simulation results confirm our theoretical analysis and demonstrate the performance improvement of the proposed algorithm.
机译:异构网络和大规模MIMO可以显着提高无线网络的频谱和能量效率,并且最近引起了很多关注。在这封信中,我们研究了联合的用户关联和频谱分配,以进一步提高具有全双工无线回程的大规模启用MIMO的异构网络的频谱效率。该优化问题被表述为混合整数非线性规划问题,因此是非凸的和组合的。为了有效地解决该问题,将原始优化问题分为两个子问题,这些子问题可以用低计算复杂度的方法解决。仿真结果证实了我们的理论分析并证明了所提算法的性能改进。

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