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arXiv 2109.09217eess.SYcs.SY
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基于NOMA的IRS辅助MEC网络节能设计

Energy-Efficient Design for IRS-Assisted MEC Networks with NOMA

Qun Wang, Fuhui Zhou, Han Hu, Rose Qingyang Hu

摘要:

节能设计在无线因特网物联网(IoT)网络中至关重要。为了在服务于大规模用户的同时实现节能运行,研究了一种智能反射面(IRS)辅助的非正交多址接入(NOMA)移动边缘计算(MEC)网络。通过联合优化卸载功率、本地计算频率、接收波束形成和IRS相移矩阵,使能量效率(EE)最大化。由于目标函数的非凸性和变量间的耦合性,该问题的求解具有挑战性。提出了一种基于半定规划松弛的交替算法。仿真结果表明,所提出的设计方案在EE方面优于基准方案,应用IRS和NOMA可以有效地提高MEC网络的性能。

英文摘要:

Energy-efficient design is of crucial importance in wireless internet of things (IoT) networks. In order to serve massive users while achieving an energy-efficient operation, an intelligent reflecting surface (IRS) assisted mobile edge computing (MEC) network with non-orthogonal multiple access (NOMA) is studied in this paper. The energy efficiency (EE) is maximized by jointly optimizing the offloading power, local computing frequency, receiving beamforming, and IRS phase-shift matrix. The problem is challenging to solve due to the non-convex fractional objective functions and the coupling among the variables. A semidefinite programming relaxation (SDR) based alternating algorithm is developed. Simulation results demonstrate that the proposed design outperforms the benchmark schemes in terms of EE. Applying IRS and NOMA can effectively improve the performance of the MEC network.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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