Novel Association Strategies for Supporting Multicast in WLANs With Smart Antennas
Multicast is an important service in Wireless Local Area Networks (WLANs) as it provides an efficient means to send packets to multiple stations at the same time. Unfortunately, the transmission of multicast packets in current WLANs is bounded by the subscribing stations with the lowest data rate. A key approach to improve multicast capacity is to deploy an association control strategy that maximizes one of the following objectives: multicast throughput or number of supported users. However, past work has not considered the use of smart antennas to minimize these objectives. In fact, they only consider grouping stations according to the data rate afforded by omni directional transmission from Access Points (APs).