I already have Actiontec powerline and 4 port Hub.
My questions is Do I need another hub to get internet connection in my bedroom. What do i need to buy? Can i just buy another port hub or do have order another set?
You need two of these to establish a powerline network. One in the location where the Internet comes into the house. Another in the remote location, in your case, the bedroom. No hub or switch required on the bedroom end. Just plug the device directly into the powerline adapter. (unless you have more than one device, in which case, you need a switch) You do need a router on the end where the internet connection originates. That powerline adapter must plug into the router or switch via ethernet cable to feed the internet into the powerline network.