I am guess that seeing as you don't have a phone jack your best bet would be to tap into wifi hot spots when your on your down time. Here is a link to set it up
https://support.us.playstation.com/app/answers/detail/a_id/238/~/connect-ps3-to-wireless-network-(easy-settings)
but if you are wanting to play it while you aren't near wifi to my knowledge your only option would be satellite and from what I hear the delays of information from your system to the satellite are enough to make FPS in mutlplayer unplayable.