Max-min fair resource allocation in multi-cell ultra-high throughput WLAN

One fundamental issue in supporting multi-cell ultrahigh throughput wireless local area networks (WLAN) is how to coordinate inter-cell interference. In this paper, we present a novel max-min fair resource allocation scheme to increase system capacity and improve the communication quality of cell-edge users. We assume the users within one cell operate on orthogonal frequency channels, while users in different cells can reuse frequency channels when the predefined interference threshold is satisfied. By manipulating the original formulation and using the Lagrange multiplier method, we propose a joint channel assignment and power allocation algorithm. In order to further ensure the performance of cell-edge users, we provide higher priorities for cell-edge users during the scheduling process. The simulation shows that the proposed scheme can effectively reduce the inter-cell interference and improve the performance of cell-edge users. Compared with other existing work, the proposed scheme also achieves relatively ideal fairness and higher system performance.