论文标题
Noma对信息时代的影响：无赠款传输观点
Impact of NOMA on Age of Information: A Grant-Free Transmission Perspective
论文作者
论文摘要
本文的目的是表征非正交多重访问（NOMA）对赠款传输信息时代（AOI）的影响。特别地，将一种称为NOMA辅助随机访问的NOMA的低复杂性形式应用于无赠款传输，以说明NOMA减少AOI的两个好处，即增加通道访问并减少用户碰撞。获得了NOMA辅助授予助学金传播所获得的AOI的封闭形式的分析表达式，并进行了渐近研究以证明最简单形式的NOMA的使用已经足以将正交多重访问（OMA）的AOI减少40％以上。此外，开发的分析表达式也被证明可用于优化用户的传输尝试概率，这是无授予传输的关键参数。
The aim of this paper is to characterize the impact of non-orthogonal multiple access (NOMA) on the age of information (AoI) of grant-free transmission. In particular, a low-complexity form of NOMA, termed NOMA-assisted random access, is applied to grant-free transmission in order to illustrate the two benefits of NOMA for AoI reduction, namely increasing channel access and reducing user collisions. Closed-form analytical expressions for the AoI achieved by NOMA assisted grant-free transmission are obtained, and asymptotic studies are carried out to demonstrate that the use of the simplest form of NOMA is already sufficient to reduce the AoI of orthogonal multiple access (OMA) by more than 40%. In addition, the developed analytical expressions are also shown to be useful for optimizing the users' transmission attempt probabilities, which are key parameters for grant-free transmission.
