Infrastructure-dependent wireless multicast - improving the code rate

This paper shows how a novel infrastructure which makes use of the multiple antennas available on IEEE 802.11n Access Points can be combined with block erasure coding to multicast video with no packet loss. This paper also shows that this can be obtained while maintaining an efficient code rate, which is better than 1) packet repetition on the new infrastructure, 2) Block erasure coding on the legacy infrastructure and 3) Leader-Based Protocols used on the legacy infrastructure. This study employs physical layer data rates of 52Mbps, 58.5Mbps and 65Mbps. Hence the infrastructure proposed solves also the “Performance Anomaly Problem” which results with legacy multicast that transmits the data using the most robust modulation and coding scheme.