The patent claims that before this awesome "invention" users had to hit either 1,2, or 3 on the keypad followed by the send button in order to manage the call waiting aspect of your phone. It also claims that you had to press a different number to control a given call waiting function (place on hold, hang up current call, combine calls into a three way call, etc) depending on what you were doing on the phone at the time, so this was confusing and cumbersome for users.
So this Sony employee "invented" a simple menu system (though the patent seems to cover any sort of system, aka apple's buttons which pop up on screen when you get a call waiting type of call) which lets you (via a scroll wheel and button, in the example) select "Hold" or "Disconnnect" or what have you by scrolling and clicking. In this way the user doesn't have to remember whether they should press 1, 2, or 3 and instead can just click on words to do what they want.
It's worthwhile to look at the images which contain samples of the menu system (as well as flow charts and block layouts of a typical GSM cell phone).
TLDR: This extremely generic/broad patent is for a simple system to handle call waiting on a cell phone. A system which is novel because it's easier to use than the old keypad based system in use at the time.
Consequently it's ridiculous.
