LTE는 3세대 이동통신기술을 장기적으로 진화시킨다는 의미이다. LTE의 가장 큰 특징은 기존의 3G 서비스 기술인 WCDMA(Wideband Code Division Multiple Access), HSDPA(High Speed Downlink Packet Access) 등의 서비스와 LTE 망 연동이 가능하고, 휴대폰 하나로 모든 다양한 미디어와 통신 이용이 가능하다는 것이다. LTE는 4세대 무선통신 표준에 대한 국제전기통신연합(ITU)의 요구사항을 만족하거나 능가 하도록 3GPP에서 개발된 버전을 말한다. 3GPP 기술 보고서에서는 무선 인터페이스(E-UTRA) 및 무선 인터페이스 네트워크(E-UTRAN)에 대한 요구사항을 설명하였다. 본 고에서는 4G LTE 개발을 위한 주요 기술적 고려사항을 바탕으로 서론에 이어 LTE의 요구사항 및 기술, 특성, 그리고 LTE의 아키텍처에서 네트워크 아키텍처, QoS 구조, LTE의 무선 프로토콜 구조, 그리고 마지막으로 결론을 맺었다.
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