인터넷 환경은 고정된 위치에서 사용하는 형태에서 이동하면서 사용하는 형태로 변화하고 있다. PDA 는 올해부터 CDMA 통신 모듈을 탑재한 PDA 폰과 무선랜 기능을 갖춘 이른바 '컨버전스 PDA'의 등장이 본격화할 것으로 보인다. 주요 PDA 업체들은 이미 CDMA 모듈을 장착한 PDA 폰과 무선랜 PDA를 주력 제품으로 내세우고 있다. 이러한 환경에서 VoIP 서비스, 메신저 서비스, 전자칠판을 이용하여 데이터를 공유, 전송하는 등의 공동작업 서비스 등 PDA 중심의 모바일 협동작업 서비스가 가장 유용한 서비스중의 하나로 부각될 것이다. 본문에서는 이러한 모바일 협동작업 서비스를 제공할 수 있는 서버에 요구사항을 정의하고 본문에서 채택한 SIP/SIMPLE 표준에 대하여 설명한 후 이를 기반으로 개발한 모바일 협동 작업 서버시스템에 대한 특징들을 설명한다.
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