AI预测驱动通信,零延迟下保证内容失真不超限
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- 用在线置信预测实现零延迟压缩,保障重建质量
- 实验显示比特率降低,失真严格满足约束
- 适合实时控制、视频文本等任务导向场景
6G系统与智能设备协同发展,推动信息论向语义和任务导向转变。本文研究预测驱动通信场景:具备AI预测能力的设备在零延迟约束下,通过有反馈的无错或丢包信道进行通信,并保证重建序列的失真。考虑两类失真度量:(i) 停机式指标,适用于可容忍偶尔丢包的任务(如实时控制);(ii) 有界失真指标,适用于文本、视频等语义丰富任务。提出两种零延迟压缩算法,利用在线置信预测为每条序列提供失真保障。针对丢包信道,引入双重自适应置信更新机制,并推导出确保失真约束的丢包统计条件。在语义文本压缩任务上的实验验证了该方法,相比现有先进预测驱动压缩技术,显著降低比特率且严格满足失真要求。
原文摘要 · Abstract (English)
The development of 6G wireless systems is taking place alongside the development of increasingly intelligent wireless devices and network nodes. The changing technological landscape is motivating a rethinking of classical Shannon information theory that emphasizes semantic and task-oriented paradigms. In this paper, we study a prediction-powered communication setting, in which devices, equipped with artificial intelligence (AI)-based predictors, communicate under zero-delay constraints with strict distortion guarantees. Two classes of distortion measures are considered: (i) outage-based metrics, suitable for tasks tolerating occasional packet losses, such as real-time control or monitoring; and (ii) bounded distortion metrics, relevant to semantic-rich tasks like text or video transmission. We propose two zero-delay compression algorithms leveraging online conformal prediction to provide per-sequence guarantees on the distortion of reconstructed sequences over error-free and packet-erasure channels with feedback. For erasure channels, we introduce a doubly-adaptive conformal update to compensate for channel-induced errors and derive sufficient conditions on erasure statistics to ensure distortion constraints. Experiments on semantic text compression validate the approach, showing significant bit rate reductions while strictly meeting distortion guarantees compared to state-of-the-art prediction-powered compression methods.
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