论文标题
Noma具有有限区块长度的有效容量用于低延迟通信
Effective Capacity of NOMA with Finite Blocklength for Low-Latency Communications
论文作者
论文摘要
在本文中，我们调查了有限区块长度（简短数据包通信）的两用户非正交多访问（NOMA）网络的链路层速率，其中两个用户与一组V用户配对。总体可靠性包括传输误差概率和排队延迟违规概率。使用有效容量（EC）框架，两种用户在有限区块长度上的性能通过有限区块长度验证。具体而言，考虑到瑞利褪色通道上的传输，我们在有限的区块长度方面得出了两用户NOMA网络的EC的闭合形式表达式。我们还研究了多源NOMA网络，并得出了两用户NOMA子集的总EC，并表明具有不同通道条件的用户的NOMA设置可实现最大的总欧元。为了关注两用户NOMA网络，我们研究了传输信号噪声比率，延迟指数和传输误差概率对每个用户可实现的EC的影响。分析表明，当延迟指数较高时，由于传输误差概率的主要因素，延迟违规概率不会提高到一定值以下。使用Monte-Carlo模拟验证了两种用户NOMA的单个EC的拟议闭合形式表达式的准确性。
In this paper, we investigate the link-layer rate of a two-users non-orthogonal multiple access (NOMA) network in finite blocklength (short packet communications) regime, where the two users are paired from a set of V users. The overall reliability consists of the transmission error probability and the queuing delay violation probability. The performance of the two-users NOMA network in finite blocklength is verified for achieving latency and reliability, using the effective capacity (EC) framework. Specifically, we derive closed-form expressions for the EC of the two-users NOMA network in finite blocklength regime, considering transmissions over Rayleigh fading channels. We also study a multiuser NOMA network and derive the total EC of two-users NOMA subsets, and show that the NOMA set with users having distinct channel conditions achieve maximum total EC. Focusing on a two-users NOMA network, we study the impact of the transmit signal-to-noise ratio, delay exponent, and transmission error probability, on the achievable EC of each user. The analysis shows that when the delay exponent is high, the delay violation probability does not improve below a certain value due to the dominant factor of the transmission error probability. The accuracy of the proposed closed-form expressions for the individual EC of a two-users NOMA is verified using the Monte-Carlo simulations.
