Access control for a packet-oriented network, taking into account resilience requirements
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Abstract
The invention relates to a method for providing resources for adapting the routing process in response to the failure of a network element in a packet-oriented network. Barring checks that use thresholds are provided to control the volume of traffic in the network. Data packets are barred if their routing would otherwise mean the crossing of a threshold. According to the invention, the thresholds are defined by taking into account failure topologies or possible malfunction scenarios, to ensure that a corresponding malfunction does not lead to an overload in the network. Said definition of the thresholds allows resources to be provided or reserved to all intents and purposes for intercepting malfunctions. The advantage of the invention is that quality criteria can be upheld and quality of service features guaranteed, even during the malfunctions.
120 Citations
24 Claims
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1-12. -12. (canceled)
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13. A method of providing resources for adapting of a routing of data packets in a packet-oriented network having network elements including nodes and links, the method provided for the case of failure of a network element, the method comprising:
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determining an adapted routing through the network of a group of data packets in case of failure of a network element;
determining limit values for an admission check based on at least one transmission quality criterion, the transmission quality criterion representing a transmission quality of the group of data packets routed through the network according to the determined adapted routing;
deriving an admission limit for the admission check from the limit values;
executing the admission check relative to the group of data packets by comparing an attribute of the group of data packets to the derived admission limit; and
providing resources for an adapted routing of the group of data packets within the network only if the attribute does not violate the derived admission limit. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A router for a packet-oriented network having network elements including nodes and links, comprising a routing control unit for providing resources for an adapted routing of data packets through the network in case of failure of a network element, wherein the router is configured to:
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determine an adapted routing through the network of a group of data packets in case of failure of a network element;
determine limit values for an admission check based on at least one transmission quality criterion, the transmission quality criterion representing a transmission quality of the group of data packets routed through the network according to the determined adapted routing;
derive an admission limit for the admission check from the limit values;
execute the admission check relative to the group of data packets by comparing an attribute of the group of data packets to the derived admission limit; and
provide resources for an adapted routing of the group of data packets within the network only if the attribute does not violate the derived admission limit.
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Specification