The fusion networking based on N3IWF achieves seamless integration of WiFi and 5G technologies. By leveraging existing WiFi networks for industry-side smooth access to operator 5G networks, and operator existing networks for high-level authentication and security based on 5G networks, the N3IWF offers the most economical, efficient, and secure enterprise network deployment. N3IWF is a gateway product for WiFi-5G fusion networking, supporting N2 and N3 interfaces for 5GC. In addition, the Sequans N3IWF provides secure connections for UE's non-3GPP network access to 5G, supporting IPsec between UE and N3IWF. The WiFi-5G fusion network solution based on Sequans N3IWF can be widely applied in various scenarios, such as banks, small and medium-sized enterprises, high-speed train carriages, campuses, and shopping malls.