I see four options:
1. Don't use your laptop as WiFi-router, but buy a hardware router with more power. Nothing better than dedicated hardware.
2. Buy a range extender.
3. Put your laptop nearer to your bedroom when using it as a router.
4. Use powerline Ethernet in stead of WiFi
How to extend wifi range,do I need to buy a device? I create my home wifi with My WIFI Router software, but signal is a little weak in my bedroom. The developer told me the power of the wifi signal created by the software - My WIFI Router is decided by the wifi hardware of my laotop. Is it true? Do you know how to boost or extend wifi range?