Cellular vehicle-to-everything (C-V2X) networks are regarded as one of the main pillars to enable efficient and sustainable Intelligent Transportation Systems (ITS) safety applications and services. Such services rely on the concept of exchanging periodic status updates (i.e., basic safety messages (BSMs)) between nearby vehicular users (VUEs). Hence, it is essential to ensure small inter-packet gaps (IPGs) between successive BSMs from nearby VUEs. Large IPGs, due to successive packet losses, can result in stale information at a VUE. In this paper, we study the tail behavior of the IPG and the information age (IA) distributions using C-V2X transmission mode 4 (a decentralized resource allocation method based on semi-persistent scheduling (SPS)). Specifically, we investigate improvements and trade-offs introduced by the SAE-specified concept of one-shot transmissions. We use a high-fidelity system-level simulator that closely follows the SPS process of C-V2X transmission mode 4 to evaluate the performance of the interleaved one-shot SPS transmissions. Our numerical results show that the tails of the IA and IPG complementary cumulative distribution functions (CCDFs) are significantly improved when one-shot transmissions are enabled in various simulation scenarios.
翻译：因此,必须确保邻近VUES的连续连续的BSM(IPGs)之间的小包间差距(IPGs)。由于连续的包装损失,大型的IPGs能够导致VUE信息失灵。在本文中,我们用C-V2X传输模式4(基于半渗透时间表的分散资源分配方法)来研究IPG的尾部行为和信息时代的分配。具体地说,我们调查SAE规定的一发式传输概念所引入的改进和交换。我们使用一个高度不易感知的系统模拟器,密切跟踪C-V2X传输模式4的SPS进程,以评估IPG的尾部行为和信息时代(IA)使用C-V2X传输模式4(基于半渗透时间表的分散资源配置方法)的定期状况更新(即基本安全信息信息信息模式4)的分布。我们使用一个高端点系统模拟器来评估SSPA-V2X传输模式4的模拟性能模拟性能。当我们的各种IMS-DFS的累积性传输功能能够大大改进的I-DS-DS-DS-S-DS-S-DS-S-DS-S-DS-S-S-S-S-S-S-S-I-SDSDSDS-S-S-S-S-S-S-SDSDS-S-S-S-S-S-S-S-S-S-S-S-S-S-A-A-A-S-I-S-S-A-C-C-C-C-SDSDF-SDS-C-S-S-S-C-C-C-C-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-A-I-S-S-S-S-C-C-C-C-C-C-C-C-A-A-A-C-I-I-I-I-I-I-I-S-S-S-S-S-S-S-S-S-A-A-A-A-A-A-A-A-A-C-C-C-C-C-
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