The present invention relates to an apparatus and method for analyzing vulnerability of a Zigbee network. In the case where the operating state of the internal combustion engine belongs to a filter continuous recovery region, the filter forced recovery is performed when the operating state of the internal combustion engine continues to belong to the filter continuous recovery region for a predetermined time or longer. The stroller system may also be reconfigured to allow an infant occupying the upper position to sit facing the caregiver in a similar manner as a grocery cart.