you can't travel to any countries other than your home country untill u dont have a minimum 3 months valid visa,so before the travel u have to renew his RP,and ther is no problems in reneewing the RP beefore the ddate of expiry,even u can do it tomorrow itself..no need to worry,the date of RP will be from the date of expiry only..if u need more clarifications,call me on 30298020