Good luck with that.  It will require the unanimous consent of Parliament (which includes the Senate itself) and all the provinces. Harper tried but ran headlong into the Constitution.   See Reference re Senate Reform, 2014 SCC 32

Why would Quebec, Ontario and Atlantic Canada give up the unbalanced power they possess compared to the western provinces?  Quebec and Ontario each have 24 seats while Atlantic Canada, which accounts for just under seven per cent of the national population, has 30. BC and Alberta? 6 each.

Also remember this from then MP Justin Trudeau in 2013?

 “We have 24 senators from Quebec and there are just six from Alberta and six from British Columbia. That's to our advantage,”