이동통신은 그동안 1세대 AMPS에서부터 CDMA 등을 거쳐 CDMA2000 1X EV-DO, 4세대 등으로 계속 발전하고 있으며, 이에 따라 이동통신용 RF, 베이스밴드, 멀티미디어 SoC의 산업 및 기술 발전의 견인차가 되고 있다. 이러한 이동통신 SoC의 산업 및 기술 동향을 소개한다. 이동통신기술은 단순히 이동 중에 아날로그로 전화를 송수신하는 1세대로부터 데이터 통신을 비롯하여 동영상 멀티미디어를 제공하고 있고, 속도의 향상과 더불어 향후 광대역 통신망에 접속할 수 있는 IP기술의 도입하고 있는 중이다. 이에 따라 이동통신용 SoC 또한 많은 발전을 거듭해 왔고, 현재는 카메라/캠코더 기능, MP3, 위성 DMB, TV, 리모콘, 터치패드, 스테레오 기능 등 전통적인 전화기능에 여러 가지 부가기능이 통합된 컨버전스의 형태로 출현하고 있다. 통신기능에 있어서는 이동통신 기술의 발전형태에 따라 (그림 1)과 같이 분류할 수 있다. 크게 볼 때 CDMA 계열과 GSM 계열이 각각 독립적으로 발전해 오면서 IMT-2000 이후 4세대에서는 통합된 규격이 될 가능성이 많다. 또한, 멀티미디어 측면에서 볼 때 이동통신 단말은 (그림 2)와 같이 발전될 것으로 전망하고 있다.
KSP Keywords
IMT-2000, cdma2000 1x EV-DO
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