Optimal MRUs Allocation Mechanism Based on User Priority for Wi-Fi 7 Network

Multiple Resource Unit (MRU) is one of the new key features introduced by IEEE 802.11be draft. Different from IEEE 802.11ax standard, which supports assigning only one RU to each user, 802.11be supports MRU assigned to a single user to enhance the resource utilization and flexibility. Due to the strict restrictions on combinations of MRU sizes and locations specified in IEEE 802.11be draft, the resource allocation algorithms face some new challenges. In this paper, we designed an MRU resource allocation algorithm based on user priority, which considered the restrictions of MRU distribution pattern and MRU combination on different channel bandwidth. User priority is defined according to the channel condition and the priority of traffic types. Then an optimal MRUs allocation mechanism for users with different priorities is proposed to maximize the aggregate satisfaction level of the scheduled users. The matching problem of STAs and MRU locations is modeled based on graph theory KM (Kuhn-Munkras) algorithm, to find the perfect matching solution. Simulation results show that the proposed scheme can improve throughput by 39.8% and the user satisfaction level by 22.03%, compared with the baseline schemes, which evenly assigned the RU resources.