A Study of Video-on-Demand Learning System in E-learning Platform

E-learning concerns an education system based on computer and network technology and has become one of the most potential e-commerce business. As one kind of e-learning system, video-on-demand (VOD) learning system can offer learners additional approach to absorb new knowledge without the restriction of time and place. Many researches have proved that bandwidth is a key factor to commercialize VOD system. Centralized and distributed architectures of VOD learning system are proposed in this paper. Edge server is proposed to share the burden of Core Server and handle demands directly. Broadcasting popular videos by using periodic broadcasting scheme can effectively reduce the network bandwidth.