Performance evaluation of LTE in unlicensed bands for indoor deployment of ultra-broadband mobile networks

The continuous growth of worldwide mobile subscriptions and the progress of mobile devices and telecommunications in the last few years has led to a tremendous increase of demand for high data rates. The scarcity of licensed spectrum and the high costs of this resource have encouraged mobile operators to move towards the unlicensed spectrum. LTE Licensed-Assisted Access is the proposed technology, that allows to work on the 5 GHz unlicensed band. To operate on these frequencies already occupied by Wi-Fi and radar systems, LTE must fairly coexist with the above. The aim of this paper is to analyze the downlink performance improvements, offered by the aggregation of unlicensed bands, in terms of user throughput.