QoE-Aware Content Oriented Path Optimization Framework with Egress Peer Engineering
Koichiro Kanaya, Yasunobu Toyota, Wataru Mishima, Hiroki Shirokura, Hiroshi Esaki · 2022
We propose COFFEE, a Content Oriented Flexible Framework with Egress Engineering, improving client QoE in content delivery. BGP lacks visibility into performance, so they do not know which path maximizes the QoE of their content. COFFEE engineers egress paths based on the strategies formulated by content operators. Thus, it realizes performance-aware routing that reflects the characteristics of each content. The framework performs passive measurement, calculates a QoE score, and performs EPE-based routing control, for each content server. We deployed COFFEE on a real production network to evaluate its feasibility. It was verified that the paths could be routed to the QoE-optimal paths according to the application contents prepared for the experiment. In the experiment environment, the change from the content user's access to the optimal path that matched the content strategy was applied within 2 seconds. The degradation of forwarding performance due to the introduction of the framework was also confirmed to be negligible.