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| Resource allocation algorithm for wireless energy harvesting cooperative network integrating uplink and downlink |
Xin-tong ZHOU( ),Kun XIAO*() |
| School of Electronic and Information Engineering, Guangxi Normal University, Guilin 541004, China |
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Abstract The energy-efficient resource allocation algorithm was studied in the wireless energy harvesting (EH) cooperative network, in order to improve and balance the energy efficiency between uplink and downlink of the time division duplex system. A cooperative network system model considering wireless EH, spectrum sharing and system power constraints was established. Based on the established model, the system’s optimization problems of harvesting and traditional energy efficiency were formed, which integrating uplink and downlink, power constraints, bandwidth constraints and rate matching for uplink and downlink. The optimal solutions of resource allocation were obtained by mathematical analysis of the optimization problems, including the optimal transmit power of the source node, the relay node and the destination node, the optimal bandwidth allocation of the uplink and downlink, the optimal power splitting of the EH node and the optimal system energy efficiency. A resource allocation algorithm based on maximization of harvesting energy efficiency and maximization of energy efficiency was obtained. Monte Carlo simulation was carried out based on the model and the algorithm, and the algorithm was compared with the literature algorithms. Simulation results show that the algorithm effectively improves the harvesting energy efficiency and traditional energy efficiency by comprehensively optimizing resource allocation of uplink and downlink.
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Received: 05 February 2023
Published: 27 December 2023
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| Fund: 国家自然科学基金资助项目(61861006)；广西自然科学基金资助项目(2018GXNSFAA050062) |
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Corresponding Authors:
Kun XIAO
E-mail: xt213000@126.com;xiaokun@gxnu.edu.cn
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综合上下行链路的无线能量收集协作网络资源分配
为了提高和平衡时分双工系统上下行链路之间的能效，在无线能量收集(EH)协作网络中开展节能资源分配算法研究. 建立考虑无线能量收集、频谱共享、系统功率受限的协作网络模型；基于所建模型，形成综合上下行链路、功率约束、带宽约束和上下行速率匹配的优化问题，分别优化系统的绿色能效和传统能效. 对优化问题进行数学分析，得到资源分配的最优解，即源节点、中继节点和目的节点的最优发射功率，上下行链路最优的带宽分配，能量收集节点最优的功率分割以及最优的系统能效；归纳得到分别基于系统绿色能效最大化和基于系统能效最大化的资源分配算法. 对所建模型与所得资源分配算法开展蒙特卡洛仿真分析，将所得算法与文献算法进行对比. 仿真结果表明，通过综合优化系统上下行链路的资源分配，所得算法有效提升了绿色能效和传统能效.
关键词：
无线协作网络,
能量收集(EH),
资源分配,
频谱共享,
能量效率
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