Internet connectivity issue

Frequently, I seem to get "kicked" off the Internet. I will be visiting a website, finish whatever I'm doing, and wish to return to my home page. A message appears on the screen saying that I have no Internet connection. I click on the "diagnostics" button and ma taken through several steps to reestablish the connection: find my network on a list of local networds, sign in with my network password, etc. This shouldn't be happening and I'd like to correct the problem now. I have a wireless router. I also have a laptop connected to the Internet via the wireless router. Could that be the cause of the problem?