arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2008.06137cs.ITmath.IT
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有限块长机制下无人机辅助D2D网络的性能

Performance of UAV-assisted D2D Networks in the Finite Block-length Regime

Mehdi Monemi, Hina Tabassum

摘要:

我们开发了一个全面的框架,以表征和优化性能的无人机(UAV)辅助D2D网络,其中D2D传输蜂窝传输。与传统的非视距(NLoS)地面传输不同,空中传输极有可能经历视距(LoS)。因此,用精确的衰落模型表征混合空中-地面网络的性能对于精确的网络性能表征和资源优化至关重要。我们首先表征各种性能指标,如帧解码错误概率(称为可靠性),中断概率和遍历容量的用户的封闭形式的表达式。地面和空中传输可能以一定概率经历LoS Rician衰落或NLoS Nakagami-m衰落。基于导出的表达式,我们用公式表示分层双目标混合整数非线性规划(MINLP)问题,以最小化所有用户的总发射功率并最大化服从服务质量(QoS)测量的D2D用户的聚合吞吐量(即,可靠性和遍历容量)。我们提出的问题作为一个二部一对多匹配游戏模型。为了解决这个问题,我们首先获得每个D2D和蜂窝用户在任何可能的子信道上的最佳闭式功率分配,然后将它们合并以设计有效的子信道和功率分配算法。提出的算法的复杂性分析。数值结果验证了我们推导的表达式的准确性,并揭示了空中中继的意义相比,地面中继在增加D2D对的吞吐量,特别是对于遥远的D2D对。

英文摘要:

We develop a comprehensive framework to characterize and optimize the performance of a unmanned aerial vehicle (UAV)-assisted D2D network, where D2D transmissions underlay cellular transmissions. Different from conventional non-line-of-sight (NLoS) terrestrial transmissions, aerial transmissions are highly likely to experience line-of-sight (LoS). As such, characterizing the performance of mixed aerial-terrestrial networks with accurate fading models is critical to precise network performance characterization and resource optimization. We first characterize closed-form expressions for a variety of performance metrics such as frame decoding error probability (referred to as reliability), outage probability, and ergodic capacity of users. The terrestrial and aerial transmissions may experience either LoS Rician fading or NLoS Nakagami-m fading with a certain probability. Based on the derived expressions, we formulate a hierarchical bi-objective mixed-integer-nonlinear-programming (MINLP) problem to minimize the total transmit power of all users and maximize the aggregate throughput of D2D users subject to quality-of-service (QoS) measures (i.e., reliability and ergodic capacity) of cellular users. We model the proposed problem as a bi-partite one-to-many matching game. To solve this problem, we first obtain the optimal closed-form power allocations for each D2D and cellular user on any possible subchannel, and then incorporate them to devise efficient subchannel and power allocation algorithms. Complexity analysis of the proposed algorithms is presented. Numerical results verify the accuracy of our derived expressions and reveal the significance of aerial relays compared to ground relays in increasing the throughput of D2D pairs especially for distant D2D pairs.

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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