Hybrid CDN/P2P 아키텍처에서의 협력적 비디오 스트리밍과 실행 버퍼 관리 기법
Cooperative Video Streaming and Active Node Buffer Management Technique in Hybrid CDN/P2P Architecture
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초록
본 논문에서는 새로운 미디어 관리 및 전송 운용에 적합한 네트워크 형태인 Hybrid CDN/P2P 아키텍처 기반 하에서 전송 지연과 패킷 손실을 최소화하는 동시에 안정적인 망 운용 정책을 제안한다. 또한 실시간으로 대용량, 고품질의 미디어를 효과적으로 전송하고 네트워크 품질을 향상시킬 수 있도록 하기 위해 전송 스케줄링과 사용자의 요구 패턴을 기반으로 한 끊김 없는 데이터전송 그리고 이를 통한 트래픽 및 로드를 관리하는 방법을 함께 제안한다. 제안하는 영상 전송기법의 효율성 및 적용 적합도를 검증하기 위해 수행된 실험결과에 따라 제안하는 방법이 기존에제안된 방법에 비해 비교적 좋은 성능 평가가 이루어졌음을 확인하였다. 이는 프록시 서버 간의협력적 운용 방법을 통해 보유 데이터 정보를 상호 공유하고 이를 통해 각 노드가 원하는 데이터를 전송받도록 하는 동시에 실행 버퍼 전송 기법을 통해 데이터 전송 과정에서 전달된 데이터의재사용성을 높이고 있기 때문이다.
Abstract
Recently, hybrid CDN/P2P video streaming architecture is specially designed and deployed to achieve the scalability of P2P networks and the desired low delay and high throughput of CDNs. In this paper, we propose a cooperative video streaming and active node buffer management technique in hybrid CDN/P2P architecture. The key idea of this streaming strategy is to minimize network latency such as jitter and packet loss and to maximize the QoS(quality of service) by effectively and efficiently utilizing the information sharing of file location in CDN’s proxy server which is an end node located close to a user and P2P network. Through simulation, we show that the proposed cooperative video streaming and active node buffer management technique based on CDN and P2P network improves the performance of realtime video streaming compared to previous methods.
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