Design of Resource Allocation Mechanisms for Wireless Power Transfer-based Internet-of-things Data Collection System
MA Lizhi1, TANG Rui2, ZHANG Ruizhi3, HE Jinpu4
1. College of Mechanical and Electrical Engineering, Chengdu University of Technology, Chengdu 610059, China; 2. School of Electronic Information Engineering, China West Normal University, Nanchong 637002, China; 3. School of Information and Communication Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China; 4. Pan-Asia Business School, Yunnan Normal University, Kunming 650092, China
Abstract：In this study， we consider four data transmission protocols for the wireless power transfer-based Internet-of-Things (IoT) data collection system and then design the resulting resource allocation mechanisms to enhance user fairness. First， we adopt the time division multiple access protocol， in which the joint slot partition and power allocation can be equivalently transformed into a convex problem. However， this protocol poses stringent requirements for synchronization precision in IoT devices. Thus， we introduce the nonorthogonal multiple access (NOMA) protocol to avoid the partition of the transmission slot. We then propose a block coordinate descent algorithm-based mechanism to achieve a stationary point of the original non-convex problem by alternately solving two convex subproblems. However， this approach leads to severe co-channel interference， thus， impairing the transmission performance. Therefore， we design two fixed-length sliced partial NOMA protocols to balance transmission performance and implementation complexity. We also leverage the matching theory and successive convex approximation algorithm to propose two-joint slice assignment and power allocation mechanisms， respectively. Our simulation results verify the trade-off between transmission performance and implementation complexity and show the convergence of the proposed mechanisms as well as the impact of system parameters on optimized results.
马礼智, 唐睿, 张睿智, 何金璞. 基于无线能量传输的物联网数据采集系统中资源分配机制的设计[J]. 信息与控制, 2023, 52(2): 220-234.
MA Lizhi, TANG Rui, ZHANG Ruizhi, HE Jinpu. Design of Resource Allocation Mechanisms for Wireless Power Transfer-based Internet-of-things Data Collection System. Information and control, 2023, 52(2): 220-234.
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