In this paper an overview of Long Term Evolution (LTE) and Long Term Evolution-Advanced (LTE-A) is presented. It will offers superior experience to user and simplified technology for next generation mobile broadband. It provides ubiquitous coverage and roaming with existing 2G and 3G networks. Now day, mobile data traffic is expected to overtake voice traffic, which will place high requirements on mobile networks today and in the future.LTE, meets Next Generation Mobile Network’s (NGMN) requirements. Third Generation Partnership Project Long Term Evolution (3GPP LTE) aim to provide high performance services for mobile voice, video and data services at low cost deployments. LTE and LTE-Advanced technologies are candidates for the fourth generation (4G) mobile communication networks.
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