본 논문에서는 차세대 이동통신 시스템으로 개발되고 있는 HMm시스템의 3계층 프로토콜 전송절차 검증 및 SIP기반의 VoIP서비스 및 웹브라우징 서비스를 제공할 수 있는 가상 단말을 설계하고 구현하였다. 현재 구현된 가상단말은 SIP서비스를 위한 UA기능과 웹 브라우징 기능을 포함하고 있으며, UA간의 직접적인 통화 기능 및 Proxy를 이용한 통화 기능, 그리고 웹 브라우징 기능을 시험하였다. 향후 개발된 가상단말을 바탕으로 보다 확장된 SIP헤더를 처리하고 HMm 3계층 프로토콜을 세부적으로 검증할 수 있는 기능을 추가할 예정이다.
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