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Slotted ALOHA for Wireless Powered Resource-Constrained Networks

This paper introduces a Slotted ALOHA protocol targeted at wireless powered communication networks where nodes have very limited resources: each wireless energy transfer (WET) allows only basic operations and a single packet generation and transmission attempt. The hybrid access point (HAP) keeps track of the number of packet transmission attempts over the channel to perform WET once a given threshold value is reached. The numerical results indicate that there exists an optimal threshold value that maximizes throughput for a given number of nodes, packet generation rate, and number of energy packets.