Computer wake up

Not sure if this is the right forum to ask this question since it is not really regarding PocketCloud. But I don’t know where else to ask.

An essential part of being able to remotely control my desktop PC is the ability to wake it up from sleep state. I played around a little bit with some android apps to accomplish this, with mixed results. Is there a fail save way to do this? I read somewhere (forgot where) that it is actually possible to remotely wake up a computer from hibernate? This is for me an essential part of being able to use PocketCloud. I can’t (will not) leave my computer running all the time when I’m on a business trip or vacation.