New Radio (NR) Vehicle-to-Everything (V2X) Sidelink (SL), an integral part of the 5G NR standard, is expected to revolutionize the automotive and rail industries by enabling direct and low-latency exchange of critical information between traffic participants independently of cellular networks. However, this advancement depends primarily on efficient SL resource allocation. Mode 2(a) is a well-known method for this purpose, where each node autonomously selects resources. However, this method is prone to packet collisions due to the hidden-node problem. In this paper, we propose a cooperative scheduling method that could potentially address this issue. We describe an extension of Mode 2(a) that allows nodes to share resource allocation information at two hops. Initial simulation results show a promising improvement over Mode 2(a).

翻译：新无线电（NR）车辆到万物（V2X）侧链（SL）作为5G NR标准的重要组成部分，通过实现交通参与者之间独立于蜂窝网络的直接、低延迟关键信息交换，有望革新汽车与铁路行业。然而，这一进步主要依赖于高效的SL资源分配。模式2(a)是实现此目标的经典方法，其中每个节点自主选择资源。但该方法因隐藏节点问题而容易发生数据包碰撞。本文提出一种能够潜在解决该问题的协作调度方法。我们描述了模式2(a)的一种扩展方案，允许节点在两跳范围内共享资源分配信息。初步仿真结果显示，该方法相较于模式2(a)具有显著提升。