I never did controlled crying, I don't like leaving my DS crying when I don't have to, yes he needs to learn to self settle but will do so with other methods and in our own way and a bit of when he's ready thrown in.
I did more of a return method, with nighty night sweetheart, big kiss, leave the room, then returning by just placing him down and continuing to do that.
To start with he was back up shouting before I had even left the room, so return back to him and place him down with no talking, it feels like you are doing it a million times to begin with, but for me that was OK as he wasn't upset but got the idea.
It then became less times of laying him down and his sleep massively improved.... For 3/4 months, then he hit 18 months and it all went to pot for 3 weeks, then settled back down again.
If he is just shouting in the night and not upset, what happens if you leave him to it ?