In WiFi systems, nodes adopt CSMA MAC protocol to access to the shared media through contention. At the beginning, CWmin 31 meaning that there are 32 slots available for users. 1) Prove the collision probabilities of n active users for contention for channel access can be repressed by, 31 3232 In WiFi systems, nodes adopt CSMA MAC protocol to access to the shared media through contention. At the beginning, CWmin 31 meaning that there are 32 slots available for users. 1) Prove the collision probabilities of n active users for contention for channel access can be repressed by, 31 3232