Session

Hi, I have a problem with my session variables. I set them using for e.g., $_SESSION["user"]=$name; However, because of weak network links, somehow my $_SESSION variables get unset. Is there a way to still keep the session variables even though the network is unstable?? i.e. as long as my browser is open, is there a way to still store my session variables? by the way, i'm not referring to the session ids, I'm referring to the variables that i wanted to session_register(). Thank you. Regards, Hwee