Coexistence of LTE and WLAN systems and improvement of L2S interface

As Licensed spectrum for mobile communication is too limited to fulfill the increasing needs for high data rate, this paper focuses on the coexistence of Long Term Evolution (LTE) and Wireless Local Area Network (WLAN) systems on the unlicensed spectrum. Under the scenario of WLAN system interfering with LTE system, simulation results are presented to show the reception performance of LTE system. Meanwhile, link-level to system-level (L2S) interface is an important technology to reduce complexity of system-level simulation. Based on the observations of simulation results, we apply Mutual Information Effective Signal-to-Interference-and-Noise-Ratio (SINR) Mapping (MIESM) in L2S interface. The error between mapping and simulation results is negligible under low modulation order, but for high modulation order, it can't be ignored. By analyzing the factors of error, we develop a novel optimization model to improve the accuracy of MIESM, which can be applied to the future L2S interface technology for system level simulation.

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