Date Added: May 2010
IPTV has emerged as the future standard of television and drawn enormous attentions from both industry and research communities. Among different IPTV services, on-demand services are the most popular ones due to their convenience and rich content. However, supporting scalable and reliable on-demand IPTV ser-vices remains to be an important challenge. Existing IPTV architecture dedicates a centralized regional station to serve sub-scribers in the respective region regardless of temporal and spatial dynamics in service demand. As a result, it may cause significant imbalance of resource utilization and service provisioning delay at different stations, especially with increasing subscribers and video content.