Being absent from one’s wife for more than six months

I'm getting married back home , but unfortunately I will not be able to bring her to this country because I,m student. I know a Hadith where Omar ibn Alkhatab (RAA)- if I,m right - said that husband and wife must not be way from each other for more than six months. Unfortunately , I will only be able to comeback after a year minumum. Am I allowed to do that using the islaamic principal "necessity dictates exception".