Implementing multicasting
AssigneeNokia Siemens Networks Oy
InventorsToni Paila, Lin Xu
Life of this patent
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Abstract
The invention relates to an arrangement and method for implementing multicasting in IP networks, in which multicast packets are transmitted by means of a multicast tree from one transmitter through several multicast controllers to several recipients. In the method at least one multicast tree intended for control messages is generated in the network from a network multicast controller to cell-level multicast controllers. The network multicast controller transmits along the multicast tree control messages to the cell-level multicast controllers. The control messages contain information on the network multicast and a command to connect to the network multicast tree intended for multicasts.
Claims15
A method for implementing multicasting in IP networks, in which multicast packets are transmitted by means of a multicast tree from one transmitter through several multicast controllers to several recipients, the method comprising:
- generating at least one multicast tree intended for control messages in the network from a network multicast controller to multicast controllers at cell level,
- transmitting control messages from the network multicast controller along the multicast tree to the multicast controllers at cell level, the control messages containing information on the multicast transmission of the network and a command to connect to the multicast tree of the network intended for multicasts.
An arrangement for implementing multicasting in IP networks that comprises
- a number of routers transmitting messages of the different components in the network to each other,
- at least one multicast transmitter that is arranged to transmit multicast packets through a multicast tree to several receivers,
- a number of cell-level multicast controllers that are arranged to transmit packets to receivers,
- a network multicast controller that is arranged to control the cell-level multicast controllers,
- wherein the network comprises at least one multicast tree intended for control messages from the network multicast controller to the cell-level multicast controllers,
- the network multicast controller is arranged to transmit control messages along the multicast tree to the cell-level multicast controllers,
- and the control messages contain information on the multicast transmission of the network and a command to connect to the multicast tree of the network intended for multicast transmissions.
Dependencies are inferred from the claim text.