论文标题
与补充材料的基于NOMA的车辆缓存系统中的混合多播/单播设计
Hybrid Multicast/Unicast Design in NOMA-based Vehicular Caching System with Supplementary Material
论文作者
论文摘要
在本文中，我们研究了一个多输入单输出缓存的非正交多访问（NOMA）车辆方案的混合多播/单播方案，面对迅速波动的车辆无线通道。考虑到更实际的情况，正在考虑不完美的渠道状态信息。在本文中，我们制定了一个优化问题，以最大程度地提高峰值功率，峰值回程，最小单播率和最大多播停机概率下的单播和率。为了解决公式的非凸问题，提出了一种下结合的松弛方法，该方法可以将原始问题分为两个凸子问题。计算机模拟显示，拟议的缓存NOMA优于正交多重访问。
In this paper, we investigate a hybrid multicast/ unicast scheme for a multiple-input single-output cache-aided non-orthogonal multiple access (NOMA) vehicular scenario in the face of rapidly fluctuating vehicular wireless channels. Considering a more practical situation, imperfect channel state information is taking into account. In this paper, we formulate an optimization problem to maximize the unicast sum rate under the constraints of the peak power, the peak backhaul, the minimum unicast rate, and the maximum multicast outage probability. To solve the formulated non-convex problem, a lower bound relaxation method is proposed, which enables a division of the original problem into two convex sub-problems. Computer simulations show that the proposed caching-aided NOMA is superior to the orthogonal multiple access counterpart.
