사물인터넷은 다양한 응용 및 융합 서비스를 창출할 새로운 기회의 장으로 떠오르고 있다. 가트너 등의 시장 조사기관 및 전문가 들의 예측에 따르면 2020년까지 사물인터넷 디바이스는 300~500억 대로 증가할 것이며, 시장 규모는 3,000억 달러를 초과할 것으로 전망하였다. 이러한 거대한 규모의 시장 선점을 위한 기술 간, 업체 간 경쟁도 한층 증대되고 있다. 비 3GPP 계열 LPWA 네트워크는 유럽을 중심으로 이미 서비스가 시작되었으며, 3GPP에서는 LPWA 네트워크 실현을 위해 Narrowband Internet-of-Things(NB-IoT)를 새롭게 소개하였다. NB-IoT는 비 3GPP 계열 LPWA 기술과의 경쟁 속에서도 빠르게 시장에 진입할 것으로 기대된다. 본고에서는 표준화가 완료된 3GPP Release 13 NB-IoT 기술과 Release 14을 목표로 표준화가 진행 중인 NB-IoT enhancement에 대해 기술한다.
KSP Keywords
NarrowBand Internet of Things(NB-IoT), internet of things(IoT)
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