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arXiv 1901.07006cs.NI
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5G随机接入增强技术性能评估研究uRLLC

On Performance Evaluation of Random Access Enhancements for 5G uRLLC

Jayashree Thota, Adnan Aijaz

摘要:

在实现用于未来工厂(FoF)应用的超可靠低延迟通信(uRLLC)中的关键挑战之一是增强蜂窝随机接入信道(RACH)过程。现有技术的LTE RACH过程不满足所设想的FoF应用的延迟要求。此外,由于来自大规模机器类型通信(mMTC)设备的拥塞和过载而导致冲突,特别是在人口密集的工厂场景中,这变得具有挑战性。本文的主要目标是对5G无线网络上uRLLC的不同随机接入(RA)增强进行全面的性能评估。我们的性能评估是基于一个现实的系统级模拟器。在这项工作中考虑的核心增强包括早期数据传输(EDT),保留的优先级和灵活的物理(PHY)层参数的使用。我们还提出了三个新的RA增强uRLLC。性能评估表明,所提出的RA增强可以在工厂环境中以99.99%的可靠性满足小于10 ms延迟的3GPP控制平面目标。

英文摘要:

One of the key challenges in realizing ultra-reliable low-latency communications (uRLLC) for factories-of-the-future (FoF) applications is to enhance the cellular random access channel (RACH) procedure. The state-of-the-art LTE RACH procedure does not fulfil the latency requirements for envisioned FoF applications. Moreover, it becomes challenging due to congestion and overloading from massive machine type communication (mMTC) devices leading to collisions especially in a densely populated factory scenarios. The main objective of this paper is to conduct a comprehensive performance evaluation of different random access (RA) enhancements for uRLLC over 5G wireless networks. Our performance evaluation is based on a realistic system-level simulator. The core enhancements considered in this work include early data transmission (EDT), reserved preambles and the use of flexible physical (PHY) layer numerology. We also propose three new RA enhancements for uRLLC. Performance evaluation demonstrates that the proposed RA enhancements can fulfil the 3GPP control plane target of less than 10 ms latency with 99.99% reliability in factory environments.

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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