论文标题
在有限的块长度方面的无人机辅助D2D网络的性能
Performance of UAV-assisted D2D Networks in the Finite Block-length Regime
论文作者
论文摘要
我们开发了一个综合框架，以表征和优化由无人机（UAV）辅助的D2D网络的性能，其中D2D传输底层底层蜂窝传输。与常规的非视线（NLOS）陆地传输不同，航空传播很可能经历视线（LOS）。因此，以精确的网络性能表征和资源优化的方式表征具有准确褪色模型的混合空中事物网络的性能至关重要。我们首先表征了各种性能指标的封闭形式表达式，例如框架解码误差概率（称为可靠性），用户的中断概率和ergodic能力。陆地和空中传输可能会出现Los Rician褪色或Nlos Nakagami-M的衰落，具有一定的概率。基于派生的表达式，我们制定了分层双目标混合式 - 零件编程（MINLP）问题，以最大程度地减少所有用户的总发射功率，并最大程度地提高D2D用户的聚集量，以受到服务质量（QOS）度量（即可靠性和毛茸茸的能力）的质量质量（QOS）。我们将提出的问题建模为一对一的一对一匹配游戏。为了解决此问题，我们首先在任何可能的子渠道上为每个D2D和蜂窝用户获得最佳的闭合功率分配，然后将它们合并以设计有效的子渠道和功率分配算法。提出了提出的算法的复杂性分析。数值结果验证了我们衍生表达式的准确性，并揭示了与地面继电器在增加D2D对的吞吐量相比，尤其是对于遥远的D2D对而言。
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.
