论文标题
截断的通道反转功率控制以启用具有不完美通道互惠的单向urllc
Truncated Channel Inversion Power Control to Enable One-Way URLLC with Imperfect Channel Reciprocity
论文作者
论文摘要
我们建议使用通道反转功率控制（CIPC）来实现单向超级可靠和低延迟通信（URLLC），在一个方向上只需要超可靠性和低延迟。基于频道互惠，我们提出的CIPC方案通过改变传输信号和功率来保证用于将信息解码为恒定值$ q $的接收信号的功率，这会放松对用户了解通道状态信息（CSI）的假设。因此，CIPC方案消除了CSI反馈的开销，减少通信延迟，并探索多个天线的好处，以显着提高传输可靠性。我们为提出的CIPC方案的数据包损耗概率得出分析表达式，基于我们确定封闭间隔和凸面设置，用于以不完美和完美的通道倒流在CIPC中优化$ q $。我们的结果表明，CIPC是实现单向URLLC的有效手段。进一步揭示了可靠性，延迟和所需资源（例如传输天线）之间的权衡，这为设计单向URLLC系统提供了新的原则。
We propose to use channel inversion power control (CIPC) to achieve one-way ultra-reliable and low-latency communications (URLLC), where only the transmission in one direction requires ultra reliability and low latency. Based on channel reciprocity, our proposed CIPC schemes guarantee the power of received signal that is used to decode the information to be a constant value $Q$, by varying the transmit signal and power, which relaxes the assumption of knowing channel state information (CSI) at the user. Thus, the CIPC schemes eliminate the overhead of CSI feedback, reduce communication latency, and explore the benefits of multiple antennas to significantly improve transmission reliability. We derive analytical expressions for the packet loss probability of the proposed CIPC schemes, based on which we determine a closed interval and a convex set for optimizing $Q$ in CIPC with imperfect and perfect channel reciprocity, respectively. Our results show that CIPC is an effective means to achieve one-way URLLC. The tradeoff among reliability, latency, and required resources (e.g., transmit antennas) is further revealed, which provides novel principles for designing one-way URLLC systems.
