We study a multi-source wireless power transfer (WPT) enabled network supporting multi-sensor transmissions. Activated by energy harvesting (EH) from multiple WPT sources, sensors transmit short packets to a destination with finite blocklength (FBL) codes. This work for the first time characterizes the FBL reliability for such multi-source WPT enabled network and provides reliability-oriented resource allocation designs, while a practical nonlinear EH model is considered. For scenario with a fixed frame structure, we maximize the FBL reliability via optimally allocating the transmit power among multi-source. In particular, we first investigate the relationship between the FBL reliability and multiple WPT source power, based on which a power allocation problem is formulated. To solve the formulated non-convex problem, we introduce auxiliary variables and apply successive convex approximation (SCA) technique to the non-convex component. Consequently, a sub-optimal solution can be obtained. Moreover, we extend our design into a dynamic frame structure scenario, i.e., the blocklength allocated for WPT phase and short-packet transmission phase are adjustable, which introduces more flexibility and new challenges to the system design. We provide a joint power and blocklength allocation design to minimize the system overall error probability under the total power and blocklength constraints. To address the high-dimensional optimization problem, auxiliary variables introduction, multiple variable substitutions and SCA technique utilization are exploited to reformulate and efficiently solve the problem. Finally, through numerical results, we validate our analytical model and evaluate the system performance, where a set of guidelines for practical system design are concluded.
翻译:我们研究多源无线电力传输(WPT)的多源无线电力传输(WPT)启用网络,支持多传感器传输。通过多个WPT源的能源采集(EH),传感器将短包传送到有固定区段代码(FBL)的目的地。这项工作首次使FBL对多源WPT启用的网络具有可靠性的特点,并提供面向可靠性的资源分配设计,同时考虑一个实用的非线性EH型模式。对于具有固定框架结构的情景,我们通过优化分配多源传输的电力传输能力,最大限度地实现FBL的可靠性。特别是,我们首先调查FBL可靠性和多个WPT源电源电源电源电源的能量之间的关系,在此基础上制定电力分配问题。为了解决已拟订的无区段代码问题,我们引入了辅助变量并将连续的convex近似(SCA)技术应用于非convex组件组件。因此,可以找到一个亚优性解决方案。此外,我们将我们的设计扩展成一个动态框架结构假设,即分配给WPT阶段和短盘传输源传输源传输源源源源源源源源源源源源源源源源源的可靠性和多端源源源流流流流源流源段段段段段段段段段段段段段,我们最终的系统将一个可调整整个系统在设计成本设计成本配置系统下,从而引入一个可灵活度设计系统。</s>