Multicast in point-to-point packet-switched oriented networks
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Abstract
The invention provides a solution for performing multicast within a telecommunication network. The basic idea is to introduce multicast transmission for parts of a network that is basically point-to-point oriented. This is done by creating transport multicast groups TLMG to transport data between network entities. The idea is to have a TLMG going to a node being close to the user. In one embodiment of the invention one TLMG is established between the SGSNs and RNCs and a second one between the GGSN and SGSNs. From the RNC the data is sent via a radio bearer to a user.
60 Citations
39 Claims
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1-20. -20. (canceled)
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21. A method for performing multicast transmission for a multicast group within a telecommunication network, wherein said network includes a core network comprising a router and at least one host in an access network part for handling users, wherein at least one intermediate node is located between the router and the host, and wherein the telecommunication network has a point-to-point layer above a transport layer, said method comprising the steps of:
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a user registers to a multicast group for the multicast transmission;
the router receives the registration;
the host is informed about the user being served by the host and registering to the multicast group;
the multicast transmission between the router and the host is introduced on the transport layer and said transmission is performed by means of at least one transport level multicast group tunnel on the transport layer, wherein said tunnel is assigned to the multicast group and wherein said tunnel is established by means of a transport layer protocol for tunnelling; and
,the host uses radio bearer signaling towards the user registered to the multicast group to route the multicast data to the user. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
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37. A router for performing multicast transmission for a multicast group within a telecommunication network, wherein said network includes a core network comprising a router and at least one host in an access network part for handling users, wherein at least one intermediate node is located between the router and the host, and wherein the telecommunication network has a point-to-point layer above a transport layer, said router comprising:
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means for handling a user request for registration to a multicast group;
means for providing a transport multicast group tunnel established by means of a transport layer protocol for tunnelling on the transport layer; and
,means for administrating a relation between the multicast group and the transport multicast group tunnel.
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38. An intermediate node for performing multicast transmission for a multicast group within a telecommunication network, wherein said network includes a core network comprising a router and at least one host in an access network part for handling users, wherein said intermediate node is located between the router and the host, and wherein the telecommunication network has a point-to-point layer above a transport layer, said intermediate node comprising:
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means for handling a user request for registration to a multicast group;
means for providing a transport multicast group tunnel established by means of a transport layer protocol for tunnelling on the transport layer towards the host; and
,means for administrating a relation between incoming and outgoing multicast data of the multicast transmission.
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39. A host for performing multicast transmission for a multicast group within a telecommunication network, wherein said network includes a core network comprising a router and said host in an access network part for handling users, wherein at least one intermediate node is located between the router and said host, and wherein the telecommunication network has a point-to-point layer above a transport layer, said host comprising:
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means for receiving multicast transmission arriving on the transport multicast group tunnel established by means of a transport layer protocol for tunnelling on the transport layer; and
,means for administration a relation between the received multicast transmission and the user in order to forward the multicast transmission by means of radio bearer to the user.
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Specification