U-LTE and Wi-Fi Coexistence: A Survey

Coexistence between U-LTE and Wi-Fi networks is a deciding factor on the acceptance of U-LTE. As a result, a large number of studies have been carried out to identify what could be the effects that U-LTE may cause to Wi-Fi and which mechanisms could be used to ensure that these two technologies share the 5 GHz unlicensed frequency band in an efficient and fair manner. This chapter presents a survey on related work to answer the following questions: (i) What issues arise from simultaneous operation of LTE and Wi-Fi in the same spectrum bands? (ii) Which technology is affected the most? and (iii) Which factors determine the impacts of U-LTE to Wi-Fi?. It also identifies the strengths and weaknesses of existing solutions and suggests potential strategies to improve performance of these two technologies.