1. Get your land surveyed by metes and bounds by the Govt. authorised surveyor.
2. When once the borders of your land are clearly marked by the surveyor, then you can build the border wall to your land and the neighbour can not object to that because the survey would have been done earlier and the clear demarcation of the land would have been marked.
3. Even though you are in Dubai, you can give POA to some body in your family, may be to your wife or any other person, on your behalf,. to arrange for surveying of your land in India.