Abstract: For the relay-enabled backscatter communication network, the entire transmission block is divided into the backscatter phase and the symmetric transmission scheme based relay-enabled backscatter phase, and a hybrid transmission scheme is proposed, based on which a throughput maximization resource allocation scheme is designed. Specifically, a multidimensional resource allocation problem is formulated to maximize the throughput by jointly optimizing the time allocation factor, the power reflection coefficients in each phase of the Internet of Things node and the transmitting power in each phase of the hybrid access point. As the formulated optimization problem includes couplings among optimization variables and the max-min function, it is non-convex and can not be solved by the existing convex tools. Therefore, a series of slack variables and auxiliary variables are introduced and the situational discussion is applied to convert the formulated problem into a convex one. Finally, computer simulations validate the superiority of the proposed scheme.

Key words: relay-enabled backscatter communication networks, hybrid transmission scheme, resource allocation