WAIC 网络上行多用户分簇比例公平访问方法

Wireless local area network (WLAN) is one of the candidate technologies for wireless interconnection in wireless avionics intra-communications (WAIC) cabins. Drawing from the access mechanism defined by the IEEE 802.11ax standard and improving the uplink multi-user orthogonal frequency division multiple access (OFDMA), a proportional fairness-based minimum padding overhead (PF-MPO) method is proposed. This method clusters multiple users and improves system throughput while ensuring proportional fairness between clusters. In addition, it can reduce padding overhead by adjusting the transmission duration of nodes within the clusters. Moreover, a waiting delay PF-MPO (WD-PF-MPO) method is extended from the PF-MPO method by setting a waiting delay threshold to allow users with high delays to transmit immediately. Simulation results show that, compared with the maximum carrier-to-interference (MAX C/I) method, which focuses solely on maximizing average throughput, PF-MPO and its extension can increase the system’s Jain fairness index to above 0.9, while reducing the maximum transmission delay by at least 25% compared to MAX C/I. Furthermore, WD-PF-MPO can further decrease the maximum transmission delay while maintaining fairness.