Share laptop wifi via bluetooth

Sitting in my own office, my itouch wifi connection is not stable and it will lose connection all the time, I thought my university has set some auto-disconnection function of it, since at home, it is always being connected to wifi without any problem. Or maybe the signal is just not stable enough? I am not sure.

But the question is this, my laptop use wifi stably! No problem at all. So I am wondering can I share the internet connection of my laptop via bluetooth with my itouch? If I can, how? If not, any technical reason? Or just Apple doesn't want it to implement this function into it?

Thanks

-Daniel