Internet keeps disconnecting. -_-?

when im on my laptop for a while, it periodically disconnects. every 10-20 minutes it will say 'no signal' and i will have to wait 5 minutes for the connection to come back on again.. it gets really annoying, and im not sure why its doing it because my roommate uses the same connection as me and she never has any troubles staying connected. is there anything i could do to fix this problem? thank you for all help.