QoE estimation from MAC-level QoS in audio-video transmission with IEEE 802.11e EDCA

This paper estimates quality of experience (QoE), i.e., user-level QoS from MAC-level QoS for audio-video transmission over an IEEE 802.11e EDCA wireless LAN. The MAC-level QoS in this case has already been studied extensively; however, it may not provide exact information on QoE, which we can obtain by the estimation. We first examine MAC-level QoS by simulation in the case where wireless stations transmit audio and video flows to an access point (AP) in the presence of transmission errors. We then assess QoE by the method of successive categories, which is a psychometric method, and perform QoS mapping between MAC-level and user-level with multiple regression analysis. As a result, we obtain multiple regression lines which estimate QoE from MAC-level QoS. Furthermore, we evaluate the effect of content types on the QoE by using estimated values from MAC-level QoS.