论文标题
NOMA的链路层速率具有有限的块长度用于低延迟通信
Link-Layer Rate of NOMA with Finite Blocklength for Low-Latency Communications
论文作者
论文摘要
非正交多访问（NOMA）与有限的区块长度（短数据包）通信被视为超级可靠和低延迟通信（URLLC）的推动者。在本文中，我们研究了有限区块长度方面的两用户NOMA的链路层速率，即有效容量。通过考虑排队延迟违规概率和传输误差概率，分析了NOMA用户的延迟性能。我们进一步为NOMA使用者在瑞利褪色环境中的个体有效能力提供了封闭式表达。通过模拟，我们研究了传输信号噪声比和延迟指数对可实现的有效能力的影响以及Noma弱者和强大用户的排队延迟违规概率。特别是，结果表明，当使用短数据包通信时，排队延迟违规概率不能提高到阈值以下。
Non-orthogonal multiple access (NOMA) in conjunction with finite blocklength (short packet) communications is regarded as an enabler for ultra-reliable and low-latency communications (URLLC). In this paper, we investigate the link-layer rate, i.e., the effective capacity, of a two-user NOMA in finite blocklength regime. The delay performance of the NOMA users is analyzed by taking into consideration the queueing delay violation probability and the transmission error probability. We further provide closed-form expressions for the individual effective capacity of the NOMA users in Rayleigh fading environment. Through simulations, we investigate the impact of the transmit signal-to-noise ratio and the delay exponent on the achievable effective capacity and the queueing delay violation probability of the NOMA weak and strong users. In particular, results show that when using short packet communications, the queueing delay violation probability cannot be improved below a threshold.
