In high-density scenarios such as exhibitions and stadiums, to improve service experience of users, the number of access users on a radio and VAP is limited. In addition, preferential access of VIP users is configured to ensure that new VIP users can still access a WLAN even when the number of access users reaches the specified threshold. This function improves experience of VIP users. As shown in Figure 1, when the number of access users reaches a specified threshold, VIP user STA_VIP can access the WLAN replacing a non-VIP user. New non-VIP users cannot access the WLAN.