Modeling and Performance Analysis of LTE Coexisting with Wi-Fi
Zichao Qin, Aijing Li, Hai Wang · 2020
The explosive growth of mobile data makes mobile operators seek the capacity of their cellular network. Besides, the scarcity of spectrum resources brings a great challenge to the development of wireless communication. Therefore, the mobile operator intends to extend LTE technology to the unlicensed spectrum, which is mainly used by Wi-Fi. LAA and LTE-U are two major unlicensed LTE technologies developed for the coexistence with Wi-Fi. Due to different access mechanisms, LAA and LTE-U have different performance trends with the change of the number of Wi-Fi stations. In this paper, we model and analyze the two coexistence modes using the Markov model, and analyze the throughput of the system, the access probability Toffand collision probability of LTE and Wi-Fi in the system where the two coexistence methods are applied to the coexistence network. The results show that LAA coexistence method is suitable for coexistence scenarios with low Wi-Fi density, while LTE-U is more suitable for coexistence scenarios with relatively high Wi-Fi density.