Skip to Main Content
In a broadcasting scheme, the user's latency is a very important parameter. The harmonic broadcasting scheme has been found to have the best performance for user's latency and staircase broadcasting scheme has been found to have the best performance for local storage as well as for disk transfer rates. In this paper a modified staircase scheme has been proposed which shows that if the video data is downloaded with lesser speed which would save the local storage and hence the disk transfer rate, the users still can be provided with the video in a continuous manner without any jerk or jitter. Further, if the downloading rate of the video is reduced after 3.25 channels, the users' services for viewing the videos does not get affected. In particular, for employing bandwidth of about 40 mbps, the modified staircase data scheme shows the performance for user latency about 29% better and the local storage is same but disk I/O transfer rates are slightly higher (4%) in comparison to staircase scheme. In comparison to harmonic scheme, user's latency is 24% higher but buffer storage and disk I/O transfer rates are about 35% and 30%, respectively, better for the same bandwidth. However the values of the performance parameters converge to those of harmonic scheme as the bandwidth is increased.
Date of Publication: Dec 2002