基于pc5的C-V2X模式4感知SPS在拥塞下碰撞预警应用中的性能特征

2019 IEEE Intelligent Transportation Systems Conference (ITSC) Pub Date : 2019-10-01 DOI:10.1109/ITSC.2019.8917397

Takeshi Hirai, T. Murase

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引用次数: 6

摘要

本文研究了基于pc5的蜂窝v2x模式4的基于感知的半持久调度(Sensing-based Semi-Persistent Scheduling, SPS)在拥塞环境下碰撞预警应用中的性能特点(特别是对通信质量的不利影响)。基于感知的SPS是一种新的蜂窝v2x标准。该调度协议具有两种干扰估计机制，以从插槽使用历史中选择被认为是低干扰的传输插槽。由于模式4的信道严重拥塞，频繁的碰撞错误导致了时隙信息的丢失，估计的干扰与实际的干扰存在差异。因此，这两种机制成为选择干扰较大的槽。仿真结果表明，在拥塞情况下，基于感知的SPS通信质量比没有估计机制的方法低9%。通过行为分析和计算机仿真，指出了基于感知的SPS存在的新缺点，并提出了改进基于感知的SPS算法的必要性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Performance Characteristics of Sensing-based SPS of PC5-based C-V2X Mode 4 in Crash Warning Application under Congestion

This paper presents the performance characteristics (notably, the adverse effects on communication quality) of Sensing-based Semi-Persistent Scheduling (Sensing-based SPS) of PC5-based Cellular-V2X mode 4 in crash warning application under congested environments. Sensing-based SPS is a new Cellular-V2X standard. This scheduling protocol has two interference estimation mechanisms to select a transmission slot considered as low interference from a history of slot usages. As the mode 4's channel becomes severely congested, frequent collision errors become to cause missing slot information and, the estimated interference becomes to differ from the actual one. Hence, the two mechanisms become to select a slot with higher interference. Our simulation results revealed that Sensing-based SPS was of 9% lower communication quality than that of a method with no estimation mechanisms in a congested situation. Our behavior analysis and computer simulations pointed out new disadvantages of Sensing-based SPS and presented a necessity to improve the algorithm of Sensing-based SPS.

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2019 IEEE Intelligent Transportation Systems Conference (ITSC)

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