A method and apparatus for establishing feedback channels in an MBMS (multimedia broadcast/multicast service) for UMTS (Universal Mobile Telecommunication System) by selectively establishing RRC connections with terminals that are capable of transmitting uplink feedback information regarding the particular...http://www.google.de/patents/US7363047?utm_source=gb-gplus-sharePatent US7363047 - Apparatus and method for establishing feedback in a broadcast or multicast service
