标题： MEC增强的安全关键型C-V2X通信信息新鲜度 显示英文标题

标题： MEC-enhanced Information Freshness for Safety-critical C-V2X Communications

摘要： 信息新鲜度是连接和自动驾驶驾驶等实时应用中至关重要的状态更新及时性指标。 信息年龄（AoI）度量被广泛认为有助于量化传递给相关实体的信息新鲜度。 最近，多接入边缘计算（MEC）的出现为车对一切（V2X）通信带来了多项性能优势，强调了体验到的端到端（E2E）消息延迟。 在本文中，我们认为，当涉及到安全关键的应用场景时，例如脆弱道路使用者（VRU）的情况，其他度量可以更深入地评估和解决密集城市环境中的可扩展性问题。 特别是，可以通过利用AoI度量来直接评估数据包到达时间间隔对附近车辆接收到的VRU消息及时性的影响。 为此，假设一个基于MEC的多VRU系统设置，我们对AoI进行建模，并通过与基于数值评估的最新网络架构进行性能比较，提供了MEC基础设施部署在不同系统参数设置下，针对大量连接实体的信息新鲜度和系统可扩展性提升的证据。 显示英文摘要

摘要： Information freshness is a status update timeliness indicator of utmost importance to several real-time applications, such as connected and autonomous driving. The Ageof- Information (AoI) metric is widely considered as useful to quantify the information freshness of delivered messages to the involved entities. Recently, the advent of Multi-access Edge Computing (MEC) promises several performance benefits for Vehicular-to-Everything (V2X) communications, emphasizing on the experienced End-to-End (E2E) message delay. In this paper, we argue that, when it comes to safety-critical use cases, such as the one of Vulnerable Road User (VRU), additional metrics can be more insightful to evaluate and address scalability issues in dense urban environments. In particular, the impact of the packet inter-arrival time on the timeliness of VRU messages arriving at nearby vehicles can be directly assessed by exploiting the AoI metric. For that purpose, assuming a MEC-enabled multi-VRU system setting, we model the AoI and, by means of a performance comparison to the state-of-the-art network architecture based on numerical evaluations, we provide evidence of the information freshness and system scalability enhancements offered by MEC infrastructure deployment for different system parameter settings involving a large number of connected entities.