[Paper] A Cache Decision Policy for QoE Enhancement of Video and Audio Transmission over ICN/CCN

Abstract

This paper aims to QoE (Quality of Experience) enhancement of video and audio transmission over ICN (Information-Centric Networking)/ CCN (Content-Centric Networking). Each intermediate node can cache content in ICN/CCN. Then, cache decision policies, which decide whether the node cache chunks or not when receiving the chunks, have an important role. We therefore focus on a cache decision policy for QoE enhancement. We propose and evaluate a cache decision policy that combines the ideas of LCD (Leave Copy Down) and probabilistic caching, which does not require special resources or prior knowledge. We assess application-level QoS (Quality of Service) using a computer simulation with a tree network and QoE by means of a subjective experiment. We then show that the proposed policy can enhance QoE against conventional policies.