As new applications with more stringent requirements and more diverse needs emerge, next-generation Wi-Fi networks are envisioned to be equipped with advanced functionalities to properly handle them. In this dissertation, we develop novel algorithms for next-generation Wi-Fi networks in terms of three advanced functionalities: multi-link operation (MLO), integrated sensing and communications (ISAC), and access point (AP) mobility. About MLO, we have proposed innovative methods of model-free dynamic traffic steering and fairness-aware dynamic link selection. About ISAC, we have designed pioneering approaches for target tracking with ISAC and with joint ISAC and MLO, respectively. About AP mobility, we have extended a prior solution with enhanced heuristic algorithms for line-of-sight discovery. Finally, we conclude this dissertation with potential future work.