Date Added: Oct 2010
3GPP LTE/SAE is a next generation radio access system that supports future end-user requirements. The fundamental aim of Long-Term Evolution (LTE) is to improve the service provisioning and reduce user and operators cost, which will be fulfilled by improving data rates, coverage, system capacity and reducing latency. The paper presents the technical overview of Long Term Evolution (LTE)/ System Architecture Evolution (SAE), the QoS provisioning aspects of Evolved Packet System (EPS), the key research challenges and the ongoing work to provide solutions. The discussion also provides an insight into 3GPP LTE-Advanced, which is the future of LTE on the roadway to 4G.