Patent ID: 8218545
Filing Date: 2012-07-10
Classification: H04L

Abstract:
1. A method, comprising: transmitting multicast data packets in at least one first multicast tree from one transmitter through a plurality of multicast controllers to a plurality of recipients, wherein only unidirectional downlink communication exists between the multicast controllers and the recipients; generating at least one second multicast tree reserved for control messages in an internet protocol network beginning from a network multicast controller and ending to one or more multicast controllers at cell level; and the cell level multicast controller originates a message to join the second multicast tree, if the join message is received, then transmitting the control messages from the network multicast controller along the at least one second multicast tree reserved for control messages to the at least one multicast controller at cell level, the control messages comprising information on the multicast transmission of a internet protocol network and a command configured to connect to the at least one first multicast tree of the internet protocol network configured for multicasts.