Technique for Operating a Network Node
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Abstract
A technique of operating a network node of a multicast communication network comprising a plurality of network nodes which are interconnected with each other by communication links is provided, wherein the network node is associate with a common source network node. A method implementation of the technique comprises: determining a first path which connects the network node to the common source network node along a primary network tree, and determining a second path which connects the network node to the common source network node along a secondary network tree, wherein the first path and the second path show redundancy with respect to each other; receiving, at the network node, multicast data from the common source network node via the first path; triggering, by the network node, reception of multicast data from the common source network node via the second path if the network node detects a failure of the first path (e.g., determines that no multicast data is received via the first path).
57 Citations
44 Claims
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1-23. -23. (canceled)
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24. A method of operating a network node of a multicast communication network comprising a plurality of network nodes that are interconnected with each other by communication links, wherein the network node is associated with a common source network node, the method comprising:
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determining a first path that connects the network node to the common source network node along a primary network tree, and determining a second path that connects the network node to the common source network node along a secondary network tree, wherein the first path and the second path show redundancy with respect to each other; receiving, at the network node, multicast data from the common source network node via the first path; triggering, by the network node, reception of multicast data from the common source network node via the second path if the network node detects a failure of the first path, wherein the primary network tree and the secondary network tree are realized as maximally redundant trees. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37)
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38. A method of operating a common source network node of a multicast communication network comprising a plurality of network nodes that are interconnected with each other by communication links, wherein the multicast communication network comprises a primary network tree and a secondary network tree that share the common source network node, and wherein, to each of a plurality of network nodes of the multicast communication network, a first path which connects the network node to the common source network node along the primary network tree, and a second path which connects the network node to the common source network node along the secondary network tree are respectively assigned, wherein the first paths and the second paths show redundancy with respect to each other, and wherein the primary network tree and the secondary network tree are realized as maximally redundant trees, the method comprising:
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sending multicast data from the common source network node to each of the plurality of network nodes associated with the common source network node via the respective first paths; upon receipt by the common source network node of a message from a network node indicating a failure of the first path assigned to the network node, sending data from the common source network node to at least one of the plurality of network nodes which associate with the common source network node via the respective second paths.
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39. A method of operating a multicast communication network comprising a plurality of network nodes which are interconnected with each other by communication links, the method comprising:
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determining a primary network tree and a secondary network tree within the multicast communication network, wherein the primary network tree and the secondary network tree share a common source network node, and wherein, to each of a plurality of network nodes of the multicast communication network, a first path that connects the network node to the common source network node along the primary network tree, and a second path that connects the network node to the common source network node along the secondary network tree are respectively assigned, wherein the first paths and the second paths show redundancy with respect to each other, and wherein the primary network tree and the secondary network tree are realized as maximally redundant trees; sending multicast data from the common source network node to each of the plurality of network nodes associated with the common source network node via the respective first paths; if a network node detects a failure of the first path assigned to the network node, sending data from the common source network node to the network node via the respective second path.
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40. A non-transitory computer-readable medium comprising program code portions stored thereupon and configured so that, when executed by a processor in a network node of a multicast communication network comprising a plurality of network nodes that are interconnected with each other by communication links, wherein the network node is associated with a common source network node, the program code portions cause the processor to:
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determine a first path that connects the network node to the common source network node along a primary network tree, and determine a second path that connects the network node to the common source network node along a secondary network tree, wherein the first path and the second path show redundancy with respect to each other; receive, at the network node, multicast data from the common source network node via the first path; trigger, by the network node, reception of multicast data from the common source network node via the second path if the network node detects a failure of the first path, wherein the primary network tree and the secondary network tree are realized as maximally redundant trees.
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41. A multicast communication network node of a multicast communication network comprising a plurality of network nodes which are interconnected with each other by communication links, wherein the network node is configured to be associated with a common source network node, the network node being:
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configured to determine a first path that connects the network node to a common source network node along a primary network tree, and to determine a second path that connects the network node to the common source network node along a secondary network tree, wherein the first path and the second path show redundancy with respect to each other, and wherein the primary network tree and the secondary network tree are realized as maximally redundant trees; and configured to receive multicast data from the common source network node via the first path, wherein the network node is further configured to detect a failure of the first path, and to trigger reception of multicast data from the common source network node via the second path if a failure of the first path is detected.
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42. A common source network node that can be operated in a multicast communication network comprising a plurality of network nodes which are interconnected with each other by communication links, wherein the multicast communication network comprises a primary network tree and a secondary network tree that share the common source network node, and wherein, to each of a plurality of network nodes of the multicast communication network, a first path which connects the network node to the common source network node along the primary network tree, and a second path which connects the network node to the common source network node along the secondary network tree are respectively assigned, wherein the first paths and the second paths show redundancy with respect to each other, and wherein the primary network tree and the secondary network tree are realized as maximally redundant trees, the common source network node being:
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configured to send multicast data from the common source network node to each of the plurality of network nodes associated with the common source network node via the respective first paths; and configured to determine whether it has received a message from a network node indicating a failure of the first path assigned to the network node, and configured to cause the communication unit to send data from the common source network node to each of the plurality of network nodes associated with the common source network node via the respective second paths.
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43. A method of operating a network node of a multicast communication network comprising a plurality of network nodes that are interconnected with each other by communication links, wherein the network node is associated with a common source network node, the method comprising:
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determining a first path that connects the network node to the common source network node along a primary network tree, and determining a second path that connects the network node to the common source network node along a secondary network tree, wherein the first path and the second path show redundancy with respect to each other, and wherein the primary network tree and the secondary network tree are realized as maximally redundant trees; receiving, at the network node, multicast data from the common source network node via the first path and the second path concurrently.
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44. A multicast communication network node of a multicast communication network comprising a plurality of network nodes that are interconnected with each other by communication links, wherein the network node is configured to be associated with a common source network node, the network node being:
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configured to determine a first path which connects the network node to a common source network node along a primary network tree, and to determine a second path which connects the network node to the common source network node along a secondary network tree, wherein the first path and the second path show redundancy with respect to each other, and wherein the primary network tree and the secondary network tree are realized as maximally redundant trees; and configured to receive multicast data from the common source network node via the first path and the second path concurrently.
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Specification