Guaranteed Dynamic Scheduling of Ultra-Reliable Low-Latency Traffic via Conformal Prediction
Guaranteed Dynamic Scheduling of Ultra-Reliable Low-Latency Traffic via Conformal Prediction
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DOI：
10.1109/lsp.2023.3264939
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发表时间：
2023-02
影响因子：
3.9
通讯作者：
K. Cohen;Sangwoo Park;O. Simeone;P. Popovski;S. Shamai
中科院分区：
文献类型：
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作者：
K. Cohen;Sangwoo Park;O. Simeone;P. Popovski;S. Shamai
通过仅在必要时分配资源，对上行链路中的超可靠和低延迟通信流量(URLLC)的动态调度可以显著提高共存服务(例如增强型移动宽带(EMBB)设备)的效率。主要的挑战是URLLC包生成过程中的不确定性，这要求对即将到来的帧中的URLLC流量使用预测器。在实践中，这种预测可能高估或低估要生成的URLLC数据量，从而产生过多或不足的资源量以抢占地分配给URLLC分组。在这封信中，我们介绍了一种新的URLLC分组调度器，该调度器在可靠性和延迟方面提供了形式上的保证，而与URLLC流量预测器的质量无关。该方法充分利用了在线共形预测的最新进展，遵循动态调整分配资源量的原则，以满足设计者设定的可靠性和时延要求。
The dynamic scheduling of ultra-reliable and low-latency communication traffic (URLLC) in the uplink can significantly enhance the efficiency of coexisting services, such as enhanced mobile broadband (eMBB) devices, by only allocating resources when necessary. The main challenge is posed by the uncertainty in the process of URLLC packet generation, which mandates the use of predictors for URLLC traffic in the coming frames. In practice, such prediction may overestimate or underestimate the amount of URLLC data to be generated, yielding either an excessive or an insufficient amount of resources to be pre-emptively allocated for URLLC packets. In this letter, we introduce a novel scheduler for URLLC packets that provides formal guarantees on reliability and latency irrespective of the quality of the URLLC traffic predictor. The proposed method leverages recent advances in online conformal prediction (CP), and follows the principle of dynamically adjusting the amount of allocated resources so as to meet reliability and latency requirements set by the designer.