Abstract:IEEE 802.11ac technology has become the main technology of the next generation LAN, which has greatly improved the transmission rate by increasing the types of multiple input and multiple output technologies, channel width, coding and modulation strategies. However, the increased types also lead to many problems such as excessive search space when the rate is selected, long search time, and high computational complexity. And the existing rate adaptive algorithm for IEEE802.11a/b/g/n cannot solve this problem. To settle this problem, we propose a hybrid rate adaptive algorithm called VhRa in high-speed wireless LAN mode. The algorithm utilizes the MIMO mode, the optimal setting of the channel width and the monotonic relationship between the RSSI to perform feature extraction, and selects the mode based on the zigzag detection by using the dichotomy in the MCS selection, thereby reducing the space for algorithm search and improving the search efficiency. Thus, the algorithm further increases the transmission throughput. The experiment results show that VhRa offers search efficiency up to 42% over RRAA, up to 20% over Minstrel-HT. At the same time, the throughput analysis of the algorithm is carried out in different scenarios. Compared with RRAA, Minstrel-HT, and Samplelite in mobile environment, VhRa offers throughput gain up to 90% over RRAA, up to 10% over Minstrel-HT, and up to 34% over Samplelite.