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Sensors 2018, 18(6), 1890; https://doi.org/10.3390/s18061890

Fairness-Aware Resource Allocation in Multi-Hop Wireless Powered Communication Networks with User Cooperation

Department of Computer Science and Technology, Xi’an Jiaotong University, Xi’an 710049, China
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Received: 14 April 2018 / Revised: 23 May 2018 / Accepted: 5 June 2018 / Published: 8 June 2018
(This article belongs to the Section Sensor Networks)
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Abstract

In wireless powered communication networks (WPCNs), the harvested energy varies greatly among user nodes (UNs), resulting in throughput unfairness. Since the harvested energy is limited, each UN must strategically allocate the energy used for forwarding the other nodes’ information and for transmitting its own information, which further aggravates the global unfairness in terms of throughput. In this paper, we leverage user cooperation in multi-hop transmission to improve the throughput fairness. We formulate the fairness problem as the max-min throughput with resource allocation, which is NP-hard. We design an approximate algorithm to address this problem. The theoretical proof and the simulation results both show that the proposed algorithm provides tight upper and lower bounds for the optimal solution. Compared with the benchmark methods, our proposed method significantly enhances the throughput fairness for WPCNs. View Full-Text
Keywords: user cooperation; approximate algorithm; WPCN; max-min throughput problem user cooperation; approximate algorithm; WPCN; max-min throughput problem
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Lei, M.; Zhang, X.; Ding, H.; Yu, B. Fairness-Aware Resource Allocation in Multi-Hop Wireless Powered Communication Networks with User Cooperation. Sensors 2018, 18, 1890.

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