LTE in Unlicensed spectrum (LTE-U) is one of the hot topics in 2015 telecom industry. LTE-U extends the benefits of LTE and LTE Advanced to unlicensed spectrum, enabling mobile operators to offload data traffic onto unlicensed frequencies more efficiently.
LTE-U also poses major challenges to WiFi as both will
operate in an unlicensed and un-controlled spectrum. However, various techniques have
been developed to share the unlicensed spectrum fairly between LTE and WiFi
technologies. Please check below white paper from Nokia for more details on LTE-U