Okay, so technically Apple isn't patenting "Spidey Sense" (TM Marvel Comics, of course), but a system to warn users of impending dropped signals, be they cellular or WiFi.
So, by way of example, if I called Steve Jobs to tell him I snapped a pick of the iPhone 3.0 prototype, and Rogers' service began to cut out, I'd get a notification (sound, alert dialog, or vibe) warning me I was going to lose the signal, and on his end, El Jobso would likewise be alerted.