This document provides an overview of LTE and LTE-Advanced mobile communication standards. It discusses the history and development of LTE beginning in 2004. The benefits of LTE include higher bandwidth, data rates, and efficiency. The network architecture of LTE includes evolved Node Bs, serving gateways, packet data network gateways, and mobility management entities. Key technologies that enable LTE are OFDMA, MIMO, and SC-FDMA. LTE-Advanced was standardized in 2011 and first implemented commercially in 2012, providing further enhanced capabilities over LTE.