Multicast transmission to a radio access network
First Claim
1. A method for performing a multicast transmission in a network, the method comprising:
- generating a message comprising identification information at a network node of a core network, wherein the identification information comprises an indicator of a virtual context associated with a multicast group, and wherein the virtual context corresponds to a plurality of respective International Mobile Subscriber Identity (IMSI) identifiers only for the terminal devices of the multicast group such that the multicast message is to be sent only to the terminal devices of the multicast group; and
transmitting the message from the network node of the core network to a radio network controller of a radio access network and simultaneously reserving resources for each of the terminal devices of the multicast group using a control information transmission protocol, wherein the control information transmission protocol comprises a radio access network application part protocol.
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Abstract
The present invention relates to a method and system for performing a multicast transmission in a cellular network, wherein an identification information, which indicates terminal devices and/or areas in which authorized terminal devices are assumed to be located, is transmitted from a core network (100) to a radio access network of the cellular network by using a control information transmission protocol. Then, a signalling connection of a control and user data transmission protocol is establishing based on said identification information and used for transmitting multicast related data and corresponding control information between the core network (100) and the radio access network. Thereby, already defined protocol layers can be used for implementing multicast transmission, while modifications are minimized.
15 Citations
23 Claims
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1. A method for performing a multicast transmission in a network, the method comprising:
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generating a message comprising identification information at a network node of a core network, wherein the identification information comprises an indicator of a virtual context associated with a multicast group, and wherein the virtual context corresponds to a plurality of respective International Mobile Subscriber Identity (IMSI) identifiers only for the terminal devices of the multicast group such that the multicast message is to be sent only to the terminal devices of the multicast group; and transmitting the message from the network node of the core network to a radio network controller of a radio access network and simultaneously reserving resources for each of the terminal devices of the multicast group using a control information transmission protocol, wherein the control information transmission protocol comprises a radio access network application part protocol. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for performing a multicast transmission in a network, the method comprising:
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receiving a message comprising identification information from a network node of a core network at a radio network controller of a radio access network, wherein the identification information comprises an indicator of a plurality of terminal devices in a multicast group to which a multicast transmission is directed, and wherein the indicator identifies a virtual context associated with the multicast group; simultaneously reserving resources for each of the plurality of terminal devices in the multicast group using a control information transmission protocol, wherein the control information transmission protocol comprises a radio access network application part protocol; and establishing a signaling connection by creating a virtual context in the radio network controller of the radio access network based on the identification information received from the network node of the core network, wherein the virtual context corresponds to a plurality of respective International Mobile Subscriber Identity (IMSI) identifiers only of the plurality of terminal devices in the multicast group, and wherein the plurality of terminal devices includes all terminal devices to which a multicast message is to be sent such that the multicast message is to be sent only to the terminal devices of the multicast group. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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Specification