Abstract
A packet radio data network and methods have been disclosed the network comprising at least a gateway node (GGSN) at least one serving node (SGSN) connected to the gateway node a plurality of radio access nodes (RAN) connected to the serving node (SGSN) the packet radio network transporting packet data from an external packet data network comprising an Internet Service Provider (ISP) to mobile stations (MS) wirelessly attached to radio access nodes (RAN). The gateway node subsequent to a PDP multipoint context activation procedure establishes at least a first multicast tunnel (GTPT1 GTPT4 GTPT10 GTP35) between the gateway node and at least one serving node the multicast tunnel carrying IP streams pertaining to at least two mobile stations belonging to a common multicast group.
A packet radio data network and methods have been disclosed the network comprising at least a gateway node (GGSN) at least one serving node (SGSN) connected to the gateway node a plurality of radio access nodes (RAN) connected to the serving node (SGSN) the packet radio network transporting packet data from an external packet data network comprising an Internet Service Provider (ISP) to mobile stations (MS) wirelessly attached to radio access nodes (RAN). The gateway node subsequent to a PDP multipoint context activation procedure establishes at least a first multicast tunnel (GTPT1 GTPT4 GTPT10 GTP35) between the gateway node and at least one serving node the multicast tunnel carrying IP streams pertaining to at least two mobile stations belonging to a common multicast group.
Technologies
Broadcast/Multicast Mobility and handover
Product
Serving GPRS Gateway Node (SGSN)Gateway node
Use Cases
Services
Multimedia broadcast/multicast service (MBMS)
Claim
1. Packet radio data network comprising at least a gateway node (GGSN), at least one serving node (SGSN) connected to the gateway node, a plurality of radio ac- cess nodes (RAN) connected to the serving node (SGSN), the packet radio network transporting packet data from an external packet data network, comprising an Internet Service Provider (ISP), to mobile stations (MS) wirelessly attached to radio access nodes (RAN),', 'the gateway node comprising routing functionality for tunnelling IP streams (packet data units) (PDU) to a mobile station via the given point of attachment of the mobile station to a radio access node (RAN),', 'the serving node comprising mobility management and security functions for the mobile stations, the serving node engaging in PDP context activation procedures which enable a given mobile station to perform packet switched communication with the external packet data network and enable charging of such communication, whereby', 'at least the gateway node, subsequent to a PDP multipoint context activation procedure, establishes at least a first multicast tunnel (GTPT1 - GTPT4, GTPT10 - GTP35) between the gateway node and at least one serving node, the multicast tunnel carrying IP streams pertaining to at least two mobile stations belonging to a common multicast group.
2. Packet data network according to claim 1 , wherein at least a second multicast tunnel (GTPT1 - GTPT4, GTPT10 - GTP35) comprising multicast data pertaining to at least one multicast group is established between a serving node and a radio ac- cess node (RAN).
3. Packet data network according to claim 1 , wherein the content of the first multicast tunnel is identical to the content of the second multicast tunnel (GTPT1 - GTPT4, GTPT10 - GTP35).
4. Packet data network according to claim 3, wherein the first and second multicast tunnels comprise IP streams from a single multicast group
5. Packet data network according to claim 4, wherein a third multicast tunnels with identical IP stream content to the second tunnel is established, the second and the third tunnels being directed to those various radio access nodes (RAN) which demand the content.
6. Packet data network according to claims 1 - 2, wherein the first multicast tunnel comprises combined IP streams pertaining to a plurality of multicast groups.
7. Packet data network according to claim 6, wherein either the IP content of the first type of tunnel is transferred to the second type of tunnel, such that the first and second type of tunnels carry identical IP stream content or wherein the content of individual IP streams not demanded at a given radio access node (RAN) is dis- carded from the IP stream content of the tunnel of the first type at entry into the serving node, such that the second multicast tunnel carries only a sub-set of the IP stream content of the first tunnel.
8. Packet data network according to claim 6 or 7, wherein the first and second types of multicast tunnels carry IP streams of the same class of quality of service.
9. Method of establishing a multicast tunnel in a packet radio data network compris- ing at least a gateway node (GGSN), at least one serving node (SGSN) connected to the gateway node, a plurality of radio access nodes (RAN) connected to the serving node (SGSN), the packet radio network transporting packet data from an external packet data network, comprising an Internet Service Provider (ISP), to mobile stations (MS) wirelessly attached to radio access nodes (RAN), the gateway node comprising routing functionality for tunnelling IP streams (packet data units) (PDU) to a mobile station via the given point of attachment of the mobile station to a radio access node (RAN),', 'the serving node comprising mobility management and security functions for the mobile stations, the serving node engaging in PDP context activation procedures which enable a given mobile station to perform packet switched communication with the external packet data network and enable charging of such communication,', 'the gateway node being adapted to combining IP streams pertaining to a plurality of multicast groups in the same tunnel towards the serving node,', '- the serving node (SGSN) upon receiving information that a mobile station desires to register to a multicast group', 'if no tunnel exist or existing tunnels are full,', '- the serving node creating a PDP context request of multipoint type, the gateway node responding with a PDP context response effectuating setting up a multicast tunnel between the gateway node and the serving node
10. Method according to claim 10, wherein further', 'if a tunnel exists, which is not full, but the tunnel does not comprise IP stream content pertaining to the requested multicast group', '- the gateway node acknowledging to the serving node the inclusion of IP stream content of the desired multicast group in the existing tunnel
11. Method according to claim 11 , wherein further if both a tunnel exist which is not full and the IP stream content corresponding to the desired multicast group already exists in the tunnel - the gateway node acknowledging to the serving node the new multicast group member in the tunnel
12. Method of establishing a multicast tunnel in a packet radio data network comprising at least a gateway node (GGSN), at least one serving node (SGSN) connected to the gateway node, a plurality of radio access nodes (RAN) connected to the serving node (SGSN), the packet radio network transporting packet data from an external packet data network, comprising an Internet Service Provider (ISP), to mobile stations (MS) wirelessly attached to radio access nodes (RAN),', 'the gateway node comprising routing functionality for tunnelling IP streams (packet data units) (PDU) to a mobile station via the given point of attachment of the mobile station to a radio access node (RAN),', 'the serving node comprising mobility management and security functions for the mobile stations, the serving node engaging in PDP context activation procedures, which enable a given mobile station to perform packet switched communication with the external packet data network and enable charging of such communication,', 'the gateway node being able to establish a tunnel to the serving node carrying IP streams relating to a given multicast group, the serving node establishing a tunnel to at least one radio access node (RAN) carrying identical IP streams relating to the same multicast group,', 'the serving node, upon receiving a PDP context request of type multipoint from a mobile station, validating the PDP context request and checks if the requested PDP context request is not already activated by another mobile station, and if it not active issues a create PDP context request to the gateway node
13. Method according to claim 12, wherein the gateway node upon receiving the create PDP context request, creates a new entry in its PDP context table, if the PDP context is not already activated in the gateway node, enabling the multicast tunnel to be established between the gateway node and the serving node
14. Method according to claim 13, wherein after the gateway node has created the new entry in its PDP table returns a PDP context response to the serving node, whereupon the serving node sends a create PDP context multipoint to the radio access node to which the mobile station in question is attached,15. Method according to claim 14, wherein the radio access node answers the serving node with a create PDP context multipoint response thereby enabling a tunnel to be established between the serving node and the radio access node, the tunnel carrying identical content as the tunnel established between the gateway node and the serving node.']
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SUMMARY
ClaimChart-EP1421808A1-STO
Patent number:EP1421808A1
Claim Chart Type : SEP Claim Chart
Price: 200 €
Note:
The information in blue was extracted from the third parties (Standard Setting Organisation, Espacenet)
The information in grey was provided by the patent holder
The information in purple was extracted from the FrandAvenue
Explicitly disclosed patent:openly and comprehensibly describes all details of the invention in the patent document.
Implicitly disclosed patent:does not explicitly state certain aspects of the invention, but still allows for these to be inferred from the information provided.
Basis patent:The core patent in a family, outlining the fundamental invention from which related patents or applications originate.
Family member:related patents or applications that share a common priority or original filing.