GPRS 망으로 이동한 이동 ISP 가입자는 자신의 홈 ISP 망을 접속하여 무선 인터넷 서비스를 받기 위해 홈 ISP 망으로부터 인증을 받고 IP를 할당 받아야 한다. 이에 본 논문에서는 GPRS 망으로 이동한 이동 ISP 가입자의 인증 처리를 위해 PPP CHAP과 RADIUS 인증 서버의 연계 방안을 제시 한다. 이를 위해 우선 이동 ISP 망 가입자의 단말에서 정의되어야 할 인증 메시지 구조와 GPRS 망 게이트웨이에서 구현될 메시지 구조를 제시한다. 아울러 GGSN과 ISP 망간의 인증 메시지 구조 정의를 기반으로 제안된 내용에 대해 시험 환경 구축을 통해 실제 시뮬레이션 결과를 보였다.
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