Impact of direct links on Intelligent Reflect Surface-aided MEC networks
Impact of direct links on Intelligent Reflect Surface-aided MEC networks
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DOI：
10.1016/j.phycom.2022.101905
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发表时间：
2022-10
期刊：
影响因子：
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通讯作者：
Rui Zhao;Chengyuan Fan;Jianghong Ou;Dahua Fan;Jiangtao Ou;Maobin Tang
中科院分区：
文献类型：
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作者：
Rui Zhao;Chengyuan Fan;Jianghong Ou;Dahua Fan;Jiangtao Ou;Maobin Tang
研究了一种智能反射面（IRS）辅助的移动的边缘计算（MEC）网络，网络中存在直接链路，可以通过IRS中的多个元件辅助计算任务的传输。我们执行的性能评估煽动的直接链路上的中断概率的影响。具体而言，首先，我们分析了系统中断概率（SOP）与不同数量的反射元素和能量消耗的约束。此外，我们提出了两种选择方法的情况下，多个反射元件。特别地，方法I最大化第一跳反射信道，而方法II最大化双跳产物信道。进一步，针对这两种不同的方法，分别考虑了反射信道信息和中断概率的解析表达式，对系统的中断概率进行了估计。最后，数值结果验证了我们的结果的正确性。结果表明，增加反射元件的数量可以有效地降低SOP。
This paper studies an intelligent reflect surface (IRS) aided mobile edge computing (MEC) network, where the direct link exists in the network can assist the task transmission for computing with the help of multiple elements in the IRS. We perform the performance evaluation by instigating the impact of direct link on the outage probability. Specifically, Firstly, we analyze the system outage probability (SOP) with a different number of reflecting elements and energy consumption constraints. Moreover, we propose two selection methods for the case of multiple reflecting elements. In particular,Method Imaximizes the first-hop reflecting channel whileMethod IImaximizes the dual-hop product channel. In further, for the two different methods, we estimate the outage probability of the system by considering the reflecting channel information and providing the analytic expression of the outage probability, respectively. Finally, the numerical results verify the correctness of our results. The results show that increasing the number of reflecting elements can effectively reduce the SOP.