[Papers] Multiple-transmission-rate scheme using SVC technology and QoE control suitable for multicast distribution over WLAN systems
Shitara Isamu, Takefumi Hiraguri, Kentaro Nishimori, Morino Yoshiaki, Mamoru Ugajin, Hideaki Yoshino · ITE Transactions on Media Technology and Applications · 2018
Since multicast distribution using a wireless local area network (WLAN) system is broadcast distribution for each group, it can efficiently use bandwidth and is suitable for broadcast-type video delivery services. However, the conventional multicast distribution scheme for WLAN systems has several issues. A multicast is transmitted at a single transmission rate because of the distribution by a group with multiple stations (STAs). Thus, the STAs far from the access point (AP) cannot receive multicast data at a high transmission rate. On the other hand, in the case of a low transmission rate, it is impossible to transmit high-bit-rate video, and the channel utilization efficiency decreases. Furthermore, since there is no retransmission control function, packet loss occurs immediately when a propagation error or packet collision occurs. In conventional related works, the communication quality suitable for multicast distribution over a WLAN is insufficient.