QoE Comparison of Retransmission and AL-FEC on Audiovisual Groupcast over Wireless LANs

This paper performs a QoE comparison of reliable transmission methods using retransmission and AL-FEC on audiovisual Groupcast over wireless LANs. We consider audiovisual groupcast with priority control by EDCA from a single access point to multiple wireless terminals. We compare four transmission methods: Groupcast, GCR Unsolicited Retry, GCR Block Ack, and Groupcast with AL-FEC. We perform a computer simulation under various network conditions to assess application-level QoS and evaluate QoE by a subjective experiment. As a result, we find that selecting the appropriate transmission method for the network conditions can enhance QoE.