QoE based cache control in wireless multicast

In this paper, we investigate the problem of optimal content cache strategy with content of multi-available streaming rates over wireless network of different user channel condition. Our design objective is to maximize the quality of experience (QoE) at the user end under a limited cache server storage when considering the different channel condition among users. More specifically, the proposed strategy chooses the optimal subset of streaming rates based on channel condition and storage budget so that the expected QoE value at the user end is maximized. As a result, the propose strategy promote the utilization efficiency of insufficiency network resources and cache budget. Furthermore, through the analysis of the simulation results, there is a tradeoff between the cache size and the QoE value, depending on the number of users and their channel condition. The proposed cache strategy is based on the MMT standard.