You can sponsor your parents as a PR (you don't have to be a citizen). You must be physically living in Canada while sponsoring. You must also meet the low income cut off (LICO) which means you must be making a certain amount of money in order to sponsor your parent. If your single and only plan to sponsor your mother (no dependent siblings), then you must be making $27,674 to sponsor.
http://www.cic.gc.ca/english/information/applications/guides/5196E10.asp#tphp idtphp
You should also be aware that the wait is very long (5+ years). The first stage of processing (Mississauga) takes 41 months. The second stage of processing happens at the local office and approximately processing times are posted here:
http://www.cic.gc.ca/english/information/times/perm/fc-parents.asp