在WLAN中提高组播速率的研究

Research on improving multicast rate in WLAN

由于基于802.11标准的组播通信没有速率协调机制,导致组播数据包只能以最低速率发送,因此存在信道占用率高、组播性能较差的问题。文中提出了一种基于SDN的组播速率适配算法,用于在WLAN网络对多播组进行动态组播速率自适应管理。试验表明,基于该算法的组播通信的信道占有率低于IEEE802.11标准,同时能够支持更多的组播客户端和播组。

The multicast communication based on the 802.11 standard does not have a rate coordination mechanism, so the multicast data packet can be transmitted only at the lowest rate.Therefore, there is a problem of high channel occupancy and poor multicast performance..An SDN-based multicast rate adaptation algorithm for dynamic multicast rate adaptive management of multicast groups in WLAN networks is proposed in this paper.Experimental results show that the channel occupancy of multicast communication based on this algorithm is lower than the IEEE 802.11 standard, and it can support more multicast clients and broadcast groups.