My late kitty, an 18 pounder, would jump on me in bed, pat my face, knead my chest, lay on my head, etc. Often at 4 am. If I closed my bedroom door, she would throw herself against it over and over.
Now, she would do the normal pet thing and plop a few inches from the back door to my enclosed patio/air shaft, staring at me until I let her in or out. She never did that with the front door because she knew that wasn't happening.
She was always waiting for me by the front or back door when I got home from work, depending if I was coming from the garage or the bus stop. Knew what time it was, heard the garage door, heard the bus, simply waited there all day? I dunno.
My conclusion about waking me up in the morning is that she knew very well she couldn't open doors and threw herself against the bedroom door solely to make noise.
She pretty much had no use for me except at mealtimes and to manage doorknobs. I miss her like heck!