If freeze my sperm before vasectomy, what needs be done in the event i want to have a child, not consider reverse vasectomy, talk about sperm frozen?

Your call: Yes you sperm can be preserved in cryogenic lab (sperm bank) for decades for a fee . Reported over 20 yrs later of course you can freeze at home , you have to engage the service of a cryogenic lab ( sperm bank ) for a fee reported fertilization occurred 20 yrs later .It is not going to be cheap , your insurance will not cover for this kin v