A base station (110) in a wireless communications network (100) counts mobile stations (114) receiving broadcast content via multi-user channel. The base station broadcasts (608) a repeating message identifying at least one broadcast content stream and, for each stream, a REGISTER (R) or DO NOT REGISTER...http://www.google.com.au/patents/US7062272?utm_source=gb-gplus-sharePatent US7062272 - Method and apparatus to track count of broadcast content recipients in a wireless telephone network
