QoS-Oriented Content Delivery in E-Learning Systems
QoS-oriented content delivery is an important component in en-learning systems. In this paper, we study the object placement problem in the parallel-access context for QoS-oriented content delivery. The problem is formulated in terms of bandwidth maximization and further proved to be equivalent to the Fault Tolerant Facility Location Problem (FTFL). In this problem the bandwidth that violates the triangle inequality is measured by a cost function which forms a metric when the shortest-path routing is deployed. Though there have been ef.cient UFL algorithms with good performance guarantees, the challenge of the FTFL Problem arises due to the con.ict of its connectivity requirement (multiple distinct connections) and cost minimization (which leads to identical connections with the minimum cost). We investigate possible solutions for addressing this con.ict after giving an overview of the existing techniques. Extension of the problem to the context of QoE-aware multimedia delivery which has important applications in elearning systems is also discussed.
Shihong Xu Hong Shen
School of Computer Science, The University of Adelaide, SA 5005, Australia
国际会议
2009 IEEE International Symposium on IT in Medicine & Education( IEEE 教育与医药信息化国际会议)
济南
英文
665-670
2009-08-14（万方平台首次上网日期，不代表论文的发表时间）