A system, device, and method for receiver access control in a multicast communication network uses a policy service to determine whether a subscriber device can be admitted to a multicast group. The subscriber device accesses the multicast communication network via an access device. The access device...http://www.google.de/patents/US6963573?utm_source=gb-gplus-sharePatent US6963573 - System, device, and method for receiver access control in a multicast communication system
