Rankings are determined according to the PvP Points gained in PvP. At a given date and time, accumulation of PvP points will be closed, and all rewards in accordance to the rankings will be provided.
PvP ranking and rewards can be checked by tapping these buttons on your screen: Go to PvP > Ranking > Choose Ranking Type > PvP Points > Ranking Rewards, where it will be indicated when the rankings have stopped being recorded after the time limit, and rankings have been decided. Once your ranking is determined, you will be given rewards according to your rank. Also, after the time period is reset, the next period of ranking begins.