In short, if you recall the Vista Broadcast Flag issue that caused routers to lockup or reboot, this sounds like a router bug. Since it's not your router, you have to ask those that supply the router to fix or replace the defective box.
I have comcast xfinity wireless internet. My wireless network connection is called "HOME." Today, everytime I've closed my laptop and come back to it, it cannot find the "HOME" connection. This is also true of my ps3, it no longer can connect. When I look at my list of network connections I see my neighbors but not mine. The only thing that seems to fix it is unplugging and replugging in the modem. If it were once I'd think nothing of it but it has been several times today. Any suggestions as to what might be happening? Why does turning off my laptop make the network connection disappear altogether?