A simple and bandwidth efficient staggered broadcasting protocol for hot videos in VoD service

In providing video-on-demand (VoD) service to a number of clients through networks, two major technical issues are focused on both to reduce the viewer´s waiting time maintaining a given bandwidth allocation and the client´s buffer requirements. In this paper, we propose a pagoda staggered broadcasting (PSB) method which has a simple structure and substantially improves VoD efficiency. The proposed method performs significantly better than the existing VoD methods in the viewer´s waiting time and the buffer requirement with simplicity. The numerical results demonstrate that the viewer´s waiting time of the PSB method is nearly equal to the existing pagoda broadcasting methods. However the complexity of this method decreases up to 60 % if dividing coefficient h is 1 by adjusting the short front part of a video.