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arXiv 2202.06353cs.ITmath.IT
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基于NOMA的车地通信动态功率和速率分配

Dynamic Power and Rate Allocation for NOMA Based Vehicle-to-Infrastructure Communications

Chongtao Guo, Bin Liao

摘要:

在本文中,非正交多址接入(NOMA)为基础的下行链路车辆到基础设施网络。特别是,我们专注于两个用户的特定情况下,其中一个需要可靠的道路安全关键数据传输,而另一个追求高容量的服务,扩展到多用户场景。该算法仅利用信道状态信息的慢衰落特性,在考虑可靠性敏感用户的有效载荷传输中断概率的情况下,联合优化发射功率和目标速率,以最大化容量饥渴用户的期望总吞吐量.通过引入对偶变量,将优化问题转化为无约束单目标序贯决策问题。一个动态规划为基础的算法,然后设计,以获得最佳的政策,最大化的拉格朗日。然后,提出了一种基于二分搜索的方法来寻找最优的对偶变量。数值结果表明,该方案优于基线方法的预期收益,性能区域,和目标值。

英文摘要:

In this paper, a non-orthogonal multiple access (NOMA) based downlink vehicle-to-infrastructure network is considered. Particularly, we focus on the specific case of two users, one of which requires reliable road-safety-critical data transmission while the other pursues high-capacity services, with extension to multi-user scenarios. Leveraging only slow fading of channel state information, the transmit powers and target rates are jointly optimized to maximize the expected sum throughput of the capacity hungry user, with consideration of the payload delivery outage probability of the reliability sensitive user. The optimization is formulated as an unconstrained single-objective sequential decision problem via introducing a dual variable. A dynamic programming based algorithm is then designed to derive the optimal policy that maximizes the Lagrangian. Afterwards, a bisection search based method is proposed to find the optimal dual variable. The proposed scheme is shown by numerical results to be superior to the baseline methods in terms of the expected return, performance region, and objective value.

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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