Abstract
Multimedia applications and in particular video streaming and video conferencing over IEEE 802.11 wireless networks are becoming more and more common, such applications do not only require large bands but also impose strict QoS. Very High Throughput (VHT) amendments have permitted to boost data rates and provide larger bandwidth. However, this haven't resolve problems related to multicast transmission. Indeed, the IEEE 802.11aa amendment has been defined. The latter introduces new multicast transport policies, the Group Addressed Transmission Service (GATS), at the aim of ensuring a reliable multicast transport. In this paper we perform the first evaluation of the performance of the GATS in the context of an IEEE 802.11ac based network. Analysis show that the IEEE 802.11ac amendment have permitted to significantly enhance the performance of the aforementioned mechanisms. However, it raises problems related to reliability.