BC-DIR：面向V2X网络中QUIC的带Bandit控制的感知截止时间的增量冗余
BC-DIR: Bandit-Controlled Deadline-Aware Incremental Redundancy for QUIC in V2X Networks
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中文总结 AI 辅助
本文提出BC-DIR框架，将无码编码、软解码截止时间与上下文Bandit控制结合，在V2X网络中提升QUIC传输的完成率并降低开销，经仿真验证其性能优于基准方案。
中文摘要 AI 辅助
车联网（V2X）通信需要在高度动态的无线环境下实现及时且可靠的消息传输。现有将前向纠错（FEC）集成到QUIC中的方法主要依赖主动冗余，当丢包超过配置码的纠错能力时则回退到重传，这会导致突发丢包下恢复效率低下，且在网络状况良好时产生不必要的开销。本文提出一种面向基于QUIC的V2X传输的带Bandit控制的感知截止时间的增量冗余（BC-DIR）框架。BC-DIR将无码编码与软解码截止时间、冗余余量相结合，使修复能在可用传输预算内触发，同时注入超出即时 deficit 的额外修复符号以提升突发丢包下的恢复能力。上下文Bandit控制器还会根据端到端反馈在线调整冗余配置。我们还开展了突发丢包下的截止时间约束可靠性分析，证明了所提修复机制相比传统重传的优势，且存在最优冗余余量。蒙特卡洛仿真验证了分析结果。BC-DIR在基于QUIC的传输栈中实现，并在Veins/OMNeT++中分别在拥塞的城市V2X场景和稳定网络条件下进行评估。实验结果显示，在不同流量拥塞水平下，BC-DIR在拥塞V2X场景中相比基准方案将完成率提升了10%至40%，而在网络状况良好时，相比原生QUIC甚至可减少约1%的开销。
英文摘要
Vehicle-to-Everything (V2X) communications require timely and reliable message delivery under highly dynamic wireless conditions. Existing approaches that integrate forward error correction (FEC) into QUIC rely mainly on proactive redundancy and fall back to retransmission once losses exceed the correction capability of the configured code, leading to inefficient recovery under burst loss and unnecessary overhead when network conditions are favorable. This paper presents a Bandit-Controlled Deadline-Aware Incremental Redundancy (BC-DIR) framework for QUIC-based V2X transport. BC-DIR combines rateless coding with a soft decoding deadline and a redundancy margin, enabling repair to be triggered within the available delivery budget while injecting additional repair symbols beyond the immediate deficit to improve recovery under burst loss. A contextual bandit controller further adapts the redundancy configuration online according to end-to-end feedback. We also develop a deadline-constrained reliability analysis under burst loss, showing the advantage of the proposed repair mechanism over conventional retransmission and the existence of an optimal redundancy margin. Monte Carlo simulations validate the analytical results. BC-DIR is implemented in a QUIC-based transport stack and evaluated in Veins/OMNeT++ under both congested urban V2X scenarios and stable network conditions. Experimental results show that, across different traffic congestion levels, BC-DIR improves completion ratio by 10\%--40\% over benchmark schemes in congested V2X scenarios, while under favorable network conditions it can even reduce overhead by about 1\% compared with native QUIC.
