Multicast group management in telecommunication networks
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Abstract
The invention relates to a method, network node, router, serving node and system for performing multicast data delivery in a mobile telecommunication network. The basic idea is to provide a management of the multicast groups within a mobile telecommunication network. In particular this means to synchronise the multicast group information between routers, like for example the GGSNs. This avoids duplicate multicast data delivery tree allocation for the same multicast group.
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Citations
36 Claims
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1-19. -19. (Cancelled)
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20. A method for performing multicast data delivery within a mobile telecommunication network having multicast groups, said network including routers that receive multicast data and forward said data to users, wherein the multicast data delivery of a multicast group is performed by means of a multicast delivery tree with a router as a root and with the users as leafs of said tree, wherein within the mobile telecommunication network a management of the multicast groups is performed according to the following steps:
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a registration message with a request for joining a user to a multicast group is sent to the router;
the requested router checks at the receipt of the registration message, whether said router supports the multicast group;
in case of supporting the multicast group the requested router performs the registration of the user to the multicast group;
otherwise the requested router queries other routers for estimating a router supporting the multicast group in order to register the user to the requested multicast group; and
a procedure is started for joining the user to the multicast delivery tree having the supporting router as a root of the tree. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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35. A router for performing multicast data delivery within a mobile telecommunication network having multicast groups, said network including routers that receive multicast data and forward said data to users, wherein the multicast data delivery of a multicast group is performed by means of a multicast delivery tree with a router as a root and with the users as leafs of said tree, said router comprising:
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means for receiving a registration message with a request for joining a user to a multicast group;
means for checking whether said router supports the multicast group;
means for performing the registration of the user to the multicast group;
means for querying other routers for estimating a router supporting the multicast group in order to register the user to the requested multicast group;
means for joining the user to the multicast delivery tree having the supporting router as a root of the tree; and
means for receiving a deregistration message with a request for deregistration a user from the multicast group and for performing the de-registration of the user from a multicast group.
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36. A serving node for performing multicast data delivery within a mobile telecommunication network having multicast groups, said network including routers that receive multicast data and forward said data to users, wherein the multicast data delivery of a multicast group is performed by means of a multicast delivery tree with a router as a root and with the users as leafs of said tree, said serving node comprising:
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means for receiving a list with the multicast groups being pre-configured for the user;
means for performing the registration of the user to a multicast group; and
means for joining the user to the multicast delivery trees having for each tree a router supporting the multicast group as a root of the tree.
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Specification