Slowly but steadily operators are exploring the possibility to use Self Organizing Network (SON) functions in their network. Of course operators were the one to talk about SON in NGMN. Priority of the requirement was "No LTE without SON"... Amazing Operator's have mentioned the priority has high without any hesitance. To collect the basic use-cases, what 3GPP talks about SON and challenges ahead, I have listed the same in my IEEE paper published recently. The paper available in IEEE explore.