2012년부터 시작된 5G 연구는 ITU-R의 IMT2020를 중심으로 서비스를 위한 광대역(eMBB: enhanced Mobile Broad Band), 초신뢰성(uMTC: ultra reliable MTC), 초연결(mMTC: massive MTC) 을 3개 축으로 8개의 Key Capability로 구체화 되고 있으며 무선기술에 초점을 맞추고 진행되었던 이전 세대의 기술과 달리 유선 네트워크, 가상화기술, 서비스를 포함하는 다양한 방면으로 진행되고 있다. 본 논문에서는 현재까지 다양한 분야에서 이루어진 4G 의 진화를 위한 연구 및 5G 의 연구 동향을 아키텍쳐 관점에서 살펴보았다. 또한 5G 네트워크의 구현을 위해 해결이 필요한 문제를 정의하고 정의된 문제를 해결하기 위해 진행되고 있는 최근 연구 동향을 통해 향후 기술 전개방향을 예상해 보았다. 마지막으로 분석된 구조와 문제점을 종합하여 향후 예상되는 5G 구조에 대한 상위 구조를 제시하였다.
KSP Keywords
broad-band
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