The document proposes a network slicing technique for IEEE 802.11ah networks that dynamically manages radio resources by reconfiguring Restricted Access Window (RAW) parameters over time. A Virtual Network Slicing Broker is introduced as a virtual network function that defines network slices based on service features and quality of service restrictions. It communicates with an IEEE 802.11ah access point to monitor network statistics and enforce slicing configurations using a static or dynamic approach. Simulation results show the dynamic approach allows the broker to reallocate resources between slices by updating the RAW configurations, improving overall network performance.