Although LTE-Unlicenced (LTE-U) provides clear advantages for mobile operators, operating in the unlicensed 5 GHz band spectrum, the LTE-U’s coexistence with Wi-Fi has become a primary concern for the Wi-Fi industry which anticipates disruption on both the technical and business levels, according to ABI Research’s Carrier Wi-Fi market research. The LTE-U technology also promises better spectrum efficiency with better data rates and QoS to help Operators to expand network capacity without having to integrate another network, like Wi-Fi, within the cellular core.
ABI Research said that unlike Wi-Fi, LTE-U, as a propriety solution, does not sense the channel activity before transmitting. Instead, it applies a form of time sharing using periodic time slots. Such scheduled transmission of LTE-U not only adds interference and increases collisions for Wi-Fi’s opportunistic transmission, but also defies the concept of fair sharing as it seizes complete control over the channel and Wi-Fi’s transmission window.