论文标题
QoS延迟约束下NOMA上行链路网络的渐近状态分析
Asymptotic regime analysis of NOMA uplink networks under QoS delay Constraints
论文作者
论文摘要
在第五代及以后的（B5G）技术中，延迟构成的出现是超可靠的低潜伏期通信特别感兴趣的话题（例如，增强现实，触觉通信）。在本报告中，我们研究了在服务质量（QoS）延迟约束下的两个用户上行链路非正交多访问（NOMA）网络的性能，这些网络是通过其有效容量（EC）的每个用户延迟指数捕获的。我们为Noma使用者的EC提出了新颖的封闭形式表达式，并通过Monte Carlo模拟对其进行验证。有趣的是，我们的研究表明，在高信号与噪声比（SNR）区域中，强大的NOMA用户在与弱者相同的延迟约束下，EC的EC有限。我们表明，对于弱的用户，OMA在transmit SNR的较小值下的EC比Noma高，并且NOMA在发射SNR的高值下变得更加有益。对于强大的用户，我们表明，在传输SNR的较小值下，NOMA的EC比OMA高，并且在较高的传输值下，SNR OMA变得更加有益。通过引入用户配对时，当存在两个以上的NOMA用户时，我们表明，与用户配对的Noma在总链接层EC期间优于OMA。最后，我们找到了一组对，它为NOMA提供了多个用户对的上行链路中最高的总链路层。
In the fifth generation and beyond (B5G) technologies, delay constrains emerge as a topic of particular interest for ultra reliable low latency communications (e.g., enhanced reality, haptic communications). In this report, we study the performance of a two user uplink non orthogonal multiple access (NOMA) network under quality of service (QoS) delay constraints, captured through each user delay exponents in their effective capacity (EC). We propose novel closed form expressions for the EC of the NOMA users and validate them through Monte Carlo simulations. Interestingly, our study shows that in the high signal to noise ratio (SNR) region, the strong NOMA user has a limited EC no matter how large the transmit SNR is, under the same delay constraint as the weak user. We show that for the weak user OMA achieves higher EC than NOMA at small values of the transmit SNR and that NOMA become more beneficial at high values of the transmit SNR. For the strong user, we show that NOMA achieves a higher EC than OMA at small values of the transmit SNR and that at high values of the transmit SNR OMA becomes more beneficial. By introducing user pairing when more than two NOMA users are present, we show that NOMA with user pairing outperforms OMA in term of the total link layer EC. Finally, we find the set of pairs which gives the highest total link-layer in the uplink for NOMA with multiple user-pairs.
