Disclosed are methods for delivering data (212) to a wireless station (102). An access point (104), or any other suitable device or system, receives a plurality of association requests (204) from a plurality of wireless stations (102) and transmits a different association identifier (208) to each of the plurality of wireless stations (102). The access point (104) buffers data (212) for a subset of the wireless stations (102). If the number of wireless stations (102) with buffered data (212) at the access point (104) is less than a threshold, then the access point (104) transmits a list of association identifiers indicating that buffered data (212) are held for each wireless station (102) identified by the list. If the number of wireless stations (102) with buffered data (212) at the access point (104) is not less than the threshold, then the access point (104) transmits data indicative of a range of association identifiers indicating that buffered data (212) are held for at least one wireless station (102) identified by the range.