전력선 통신(Power Line Communication: PLC)은 전력을 실어 나르는 도체에 데이터를 전송시키는 통신시스템이다. 최근에 전력선 통신 기술은 매우 발전되어서 200Mbps 정도의 고속통신을 할 수 있게 되었다. 그러나 전력선 통신에 이용되는 전력선은 기본적으로 60Hz의 전력을 전송하도록 설계되었으므로 이보다 높은 고주파 신호를 보내면 표피효과로 인하여 전파가 방사되어 부근의 무선통신 시스템에 간섭 영향을 주게 된다. ITU에서는 이미 80MHz까지 전력선 통신을 사용하기 위한 관련 권고 작성이 진행 중이며 IEEE(Institute of Electrical and Electronics Engineers), OPERA(Open PLC European Research Alliance), CEPCA(Consumer Electronics Powerline Communications Alliance)와 같은 표준화 기관에서는 국제적인 전력선 통신 표준화 작업을 수행하고 있다. 또한 미국 등은 기존 무선통신 서비스에 간섭 영향을 최소화할 수 있는 기술 기준을 제정해서 전력선 통신과 주파수 대역을 공유해서 사용할 수 있도록 하고 있다. 국내에서도 30MHz 이하에서 사용되는 무선 서비스(해상/항공 통신, 아마추어무선, 방송, 공공통신 등)와의 간섭 측정 및 분석을 통해서 고속 전력선 통신을 사용할 수 있도록 2005년에 관련 규정 정비를 완료해서 옥내 및 옥외에서 고속 전력선 통신을 사용할 수 있다.
KSP Keywords
Power Line Communications(PLC), consumer electronics
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