Spectrum Multiplexing for LTE-U and Wi-Fi in Heterogeneous Network

In order to increase the network capacity and alleviate the problem of scarcity spectrum, long term evolution (LTE) in unlicensed spectrum (LTE-U) technology has been proposed to extend LTE to unlicensed spectrum. L TE-U undertakes the task of streaming data traffic for licensed spectrum, which can greatly enhance the capacity of the system. However, the introduction of LTE-U technology also gives rise to the problem of coexistence with Wi-Fi systems. In this paper, we introduce a system model of heterogeneous networks where L TE-U coexists with Wi-Fi and propose a spectrum multiplex scheme for this network scenario. The scheme ensures that Wi- Fi transmission is not interfered with, and achieves L TE- U multiplex transmission, further improving spectrum efficiency. Simulation results demonstrate that the proposed spectrum multiplex scheme can achieve L TE-U multiplex transmission while ensuring that Wi-Fi transmission is not interfered, and improves spectrum efficiency.