Fair Random Access with Track-Based SNR Scheduling for Full-Duplex Wireless Powered Communication Networks

Abstract

In this paper, we propose fair random access with track-based SNR scheduling for a full-duplex wireless powered communication network (FD-WPCN) which consists of one Hybrid-Access point (H-AP) operating in the FD mode through two antennas and multiple single-antenna Wireless Devices (WDs). As the number of WDs increases due to the rapid growth of Internet of Thing (IoT), the random access-based WPCN needs to be investigated. In practice, the WD state and SNR values have great influence on network performance. Not all of WDs are always active so that we consider the WD state in terms of the active probability. Also, since WDs have different SNR values in different locations, they are placed in track-based descending order from the SNR values. Hence, WDs with high SNR acquire random access (RA) slots before the WDs with low SNR so that low SNR WDs can harvest more energy in total. According to the comparison results, the proposed method alleviates the doubly near-far problem to enhance the user fairness.