论文标题
基于上下文的广播确认，以增强合作V2X消息的可靠性
Context-based Broadcast Acknowledgement for Enhanced Reliability of Cooperative V2X Messages
论文作者
论文摘要
大多数V2X应用程序/服务都通过不断的广播消息来支持。主要挑战之一是提高广播传输的可靠性，这些传输缺乏确保正确传递消息的机制。为了解决这个问题，一种选择是使用确认。但是，此选项应用于广播传输时存在可伸缩性问题，因为多辆车可以同时发送确认。为了在解决广播消息的可靠性时控制可伸缩性，本文提出并评估了基于上下文的广播确认机制，在该机制中，传输车辆选择性地要求确认特定/关键广播消息，并在未正确接收的情况下执行重新通讯。此外，V2X应用程序/服务确定了触发广播确认机制的情况/条件，以及应确认广播消息的接收器。本文评估了集体感知服务的基于上下文的广播确认机制的性能。获得的结果表明，提出的机制可以通过提高交换与交叉路口的车辆之间的CPM消息的可靠性，从而有助于提高交叉路口穿越行人的意识。该解决方案正在IEEE 802.11BD下进行讨论，因此可能与标准化过程有关。
Most V2X applications/services are supported by the continuous exchange of broadcast messages. One of the main challenges is to increase the reliability of broadcast transmissions that lack of mechanisms to assure the correct delivery of the messages. To address this issue, one option is the use of acknowledgments. However, this option has scalability issues when applied to broadcast transmissions because multiple vehicles can transmit acknowledgments simultaneously. To control scalability while addressing reliability of broadcast messages, this paper proposes and evaluates a context-based broadcast acknowledgement mechanism where the transmitting vehicles selectively request the acknowledgment of specific/critical broadcast messages, and performs retransmissions if they are not correctly received. In addition, the V2X applications/services identify the situations/conditions that trigger the execution of the broadcast acknowledgment mechanism, and the receiver(s) that should acknowledge the broadcast messages. The paper evaluates the performance of the context-based broadcast acknowledgment mechanism for a Collective Perception Service. The obtained results show the proposed mechanism can contribute to improve the awareness of crossing pedestrians at intersections by increasing the reliability in the exchange of CPM messages between vehicles approaching the intersection. This solution is being discussed under IEEE 802.11bd, and thus can be relevant for the standardization process.
