Video transmission over IEEE 802.11n WLAN with adaptive aggregation scheme

IEEE 802.11n is a next-generation wireless WLAN standard which can support a MAC data throughput over 100 Mbps. Frame aggregation mechanism is a key feature at the MAC layer which can improve the efficiency of channel utilization. In this paper, we investigate the performance of video transmission over IEEE 802.11n with frame aggregation mechanism. We derive the relationship between Subframe size and bit error rate and the relationship between retry limit and packet loss rate, which can be easily used to design adaptive scheme for video transmission. Simulation results shown that the optimal subframe size adaptively to channel conditions can improve the throughput but has little effect on the video quality, and proper retransmission policy can significantly improve the video quality without increasing the end-to-end delay.