论文标题
具有可重构智能表面和不完美的设备跟踪的有效URLLC
Efficient URLLC with a Reconfigurable Intelligent Surface and Imperfect Device Tracking
论文作者
论文摘要
在几种用例中，已经提出了可重新配置的智能表面（RIS）技术扩展覆盖范围并允许更好地控制无线环境，包括超可靠的低延迟通信（URLLC），通信。但是，极具挑战性的延迟约束使明确的通道估计变得困难，因此定位信息通常用于配置RIS并照亮接收器设备。在这项工作中，我们分析了瑕疵在定位信息对可靠性的影响，从而导致了与中断概率的上限。然后，我们使用这种约束来执行功率控制，有效地找到了尊重定位不确定性下的URLLC约束的最小功率。优化是保守的，因此所有点都尊重URLLC约束，并且结合相对较小，最佳差距在1.5和4.5〜dB之间。
The use of Reconfigurable Intelligent Surfaces (RIS) technology to extend coverage and allow for better control of the wireless environment has been proposed in several use cases, including Ultra-Reliable Low-Latency Communications (URLLC), communications. However, the extremely challenging latency constraint makes explicit channel estimation difficult, so positioning information is often used to configure the RIS and illuminate the receiver device. In this work, we analyze the effect of imperfections in the positioning information on the reliability, deriving an upper bound to the outage probability. We then use this bound to perform power control, efficiently finding the minimum power that respects the URLLC constraints under positioning uncertainty. The optimization is conservative, so that all points respect the URLLC constraints, and the bound is relatively tight, with an optimality gap between 1.5 and 4.5~dB.
