chapter 1 Introduction -- chapter 2 Related Work in Push-Pull Scheduling -- chapter 3 Hybrid Push-Pull Scheduling -- chapter 4 Adaptive Push-Pull Algorithm with Performance Guarantee -- chapter 5 Hybrid Scheduling with Client’s Impatience -- chapter 6 Dynamic Hybrid Scheduling with Request Repetition -- chapter 7 Service Classification in Hybrid Scheduling for Differentiated QoS -- chapter 8 Online Hybrid Scheduling over Multiple Channels -- chapter 9 Conclusions and Future Works.