V2X网络中车辆队列的队列头选择的中断分析
Outage Analysis of Platoon-Head Selection for Vehicle Platooning in V2X Networks
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中文总结 AI 辅助
该研究针对V2X网络中车辆队列的队列头选择，推导了不同中继模式下的中断表达式，实验表明动态中继选择及H-PH合理放置可显著降低中断概率，提升通信可靠性。
中文摘要 AI 辅助
本研究分析了车联网（V2X）中车辆队列的队列头选择的分组中断性能。切换队列头（H-PH）为组切换提供测量值，而通信队列头（C-PH）则中继下行链路分组。在对数正态阴影和Nakagami-m衰落条件下，我们推导了三种半双工解码转发C-PH选择模式以及直接基站（BS）组播的服务状态平均中断表达式。对于块级选择，精确的尾部公式将N维阴影期望简化为单积分。在5辆车的场景中，目标速率为50 Mb/s，且领头车辆位于两个基站中途时，直接组播的中断概率为0.269，而块级和时隙级中继选择模式的中断概率分别为0.144和0.0459。将H-PH从领头车辆移至中间车辆可使时隙级中断降低12.0%。这些结果凸显了H-PH放置和动态中继选择的可靠性优势，以及队列内快速信道状态信息共享的潜在增益。
英文摘要
This study analyzes the packet-outage performance of platoon-head selection for vehicle platooning in vehicle-to-everything (V2X) networks. A handover platoon head (H-PH) provides measurements for group handover, whereas a communication platoon head (C-PH) relays downlink packets. We derive serving-state-averaged outage expressions for three half-duplex decode-and-forward C-PH selection modes and for direct base-station (BS) groupcast under log-normal shadowing and Nakagami-m fading. For block-level selection, an exact tail formulation reduces an N-dimensional shadowing expectation to a single integral. In a five-vehicle scenario with a 50-Mb/s target rate and the leading vehicle midway between two BSs, direct groupcast yields an outage probability of 0.269, whereas the block- and slot-level relay-selection modes yield 0.144 and 0.0459, respectively. Moving the H-PH from the leading to the middle vehicle reduces slot-level outage by 12.0%. These results highlight the reliability benefits of H-PH placement and dynamic relay selection, as well as the potential gain of rapid intra-platoon channel state information sharing.
