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arXiv 1907.02576cs.ITeess.SPmath.IT
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多跳链路中最优延迟通信的早期检测

Early Detection for Optimal-Latency Communications in Multi-Hop Links

École de technologie supérieure (ÉTS)(高等技术学院);Universidad Técnica Particular de Loja (UTPL)(洛哈私立理工大学);Hydro-Québec’s Research Institute (IREQ)(魁北克水电研究所)

Diego Barragán Guerrero, Minh Au, Ghyslain Gagnon, François Gagnon, Pascal Giard

AI总结:

本文提出一种基于序贯检验的早期检测方案,在有限块长度下实现多跳链路中符号的提前可靠检测,显著降低延迟并保持错误概率低于阈值。

摘要:

现代无线机器对机器型通信旨在同时提供超高可靠性和低延迟,这些严格要求看似相互排斥。根据噪声信道编码定理,我们知道可靠通信要求传输速率低于信道容量。为了保证任意低的错误概率,这意味着需要使用长度趋于无穷大的消息。然而,长消息不适合低延迟通信。在本文中,我们提出了一种在有限块长度机制下用于无线通信的早期检测方案,该方案采用序贯检验技术来减少延迟同时保持可靠性。我们证明了我们的方案导致平均检测时间小于符号持续时间。此外,在多跳低流量或连续传输链路中,我们表明我们的方案能够在传输结束前可靠地检测符号,显著降低延迟,同时将错误概率保持在预定义阈值以下。

英文摘要:

Modern wireless machine-to-machine-type communications aim to provide both ultra reliability and low latency, stringent requirements that appear to be mutually exclusive. From the noisy channel coding theorem, we know that reliable communications mandate transmission rates that are lower than the channel capacity. To guarantee arbitrarily-low error probability, this implies the use of messages whose lengths tend to infinity. However, long messages are not suitable for low-latency communications. In this paper, we propose an early-detection scheme for wireless communications under a finite-blocklength regime that employs a sequential-test technique to reduce latency while maintaining reliability. We prove that our scheme leads to an average detection time smaller than the symbol duration. Furthermore, in multi-hop low-traffic or continuous-transmission links, we show that our scheme can reliably detect symbols before the end of their transmission, significantly reducing the latency, while keeping the error probability below a predefined threshold.

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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