High Throughput Resource Unit Assignment Scheme for OFDMA-based WLAN
Mingqing Wu, Jiabing Wang, Yi‐hua Zhu, Jintong Hong · 2019
Orthogonal Frequency Division Multiple Access (OFDMA) introduced in IEEE 802.11ax amendment promises to improve spectral efficiency by grouping subcarriers into resource units (RUs). It is important to design RU assignment to improve throughput for the OFDMA-based WLAN. In this paper, we present the High Throughput RU Assignment Scheme (HiTRAS) and formulate the optimization problem maximizing network throughput for the HiTRAS. The solution of the optimization problem leads to the optimal RU assignment that allocates RUs to multiple mobile stations (STAs) so that the STAs can transmit their uplink traffic simultaneously and thus high throughput is gained. The simulation results show that the HiTRAS outperforms the existing schemes in terms of throughput.