Automatic detection and prevention of network overload conditions using SDN
First Claim
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1. A method for mitigating network overload conditions at a target network node in a communications network, comprising:
- by a controller node of the communications network, collecting key performance indicators from a plurality of source network nodes;
by the controller node, based on the key performance indicators collected from the plurality of source network nodes, and without using information from other nodes, computing probabilities of failure of each of the source network nodes;
by the controller node, collecting key performance indicators from a plurality of intermediate network nodes, each intermediate network node receiving information from at least one of the source network nodes;
by the controller node, based on the key performance indicators collected from the intermediate network nodes, and further based on the probabilities of failure of the source network nodes from which information is received, computing probabilities of failure of each of the intermediate network nodes;
by the controller node, collecting key performance indicators from the target network node, the target network node receiving information from the intermediate network nodes;
by the controller node, computing a probability of failure of the target network node based on the key performance indicators of the target network node and further based on the probabilities of failure of the intermediate network nodes, weighted by a closeness of relationships of the intermediate network nodes to the target network node;
making a determination that the probability of failure of the target network node exceeds a threshold; and
based on the determination, spawning a new instance of the target network node;
wherein the target network node is a policy and charging rules function node, the intermediate network nodes include at least one of a gateway node and path computation element function node, and the source network nodes are edge nodes.
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Abstract
A controller node in a network implementing software defined networking (SDN) proactively detects network overload conditions in a target node and subsequently prevents the conditions from developing by launching a new virtual network node. The detection and prevention are based on the determination of a probability of failure of the target node as a weighted function of information from the target node and probabilities of failure of related nodes.
17 Citations
17 Claims
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1. A method for mitigating network overload conditions at a target network node in a communications network, comprising:
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by a controller node of the communications network, collecting key performance indicators from a plurality of source network nodes; by the controller node, based on the key performance indicators collected from the plurality of source network nodes, and without using information from other nodes, computing probabilities of failure of each of the source network nodes; by the controller node, collecting key performance indicators from a plurality of intermediate network nodes, each intermediate network node receiving information from at least one of the source network nodes; by the controller node, based on the key performance indicators collected from the intermediate network nodes, and further based on the probabilities of failure of the source network nodes from which information is received, computing probabilities of failure of each of the intermediate network nodes; by the controller node, collecting key performance indicators from the target network node, the target network node receiving information from the intermediate network nodes; by the controller node, computing a probability of failure of the target network node based on the key performance indicators of the target network node and further based on the probabilities of failure of the intermediate network nodes, weighted by a closeness of relationships of the intermediate network nodes to the target network node; making a determination that the probability of failure of the target network node exceeds a threshold; and based on the determination, spawning a new instance of the target network node; wherein the target network node is a policy and charging rules function node, the intermediate network nodes include at least one of a gateway node and path computation element function node, and the source network nodes are edge nodes. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A network controller node of a communications network, comprising:
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at least one processor; at least one network interface; and at least one computer readable storage device having stored thereon computer readable instructions that, when executed by the at least one processor, cause the at least one processor to perform operations for mitigating network overload conditions at a target network node in a communications network comprising; collecting key performance indicators from a plurality of source network nodes; based on the key performance indicators collected from the plurality of source network nodes, and without using information from other nodes, computing probabilities of failure of each of the source network nodes; collecting key performance indicators from a plurality of intermediate network nodes, each intermediate network node receiving information from at least one of the source network nodes; based on the key performance indicators collected from the intermediate network nodes, and further based on the probabilities of failure of the source network nodes from which information is received, computing probabilities of failure of each of the intermediate network nodes; collecting key performance indicators from the target network node, the target network node receiving information from the intermediate network nodes; computing a probability of failure of the target network node based on the key performance indicators of the target network node and further based on the probabilities of failure of the intermediate network nodes, weighted by a closeness of relationships of the intermediate network nodes to the target network node; making a determination that the probability of failure of the target network node exceeds a threshold; and based on the determination, spawning a new instance of the target network node; wherein the target network node is a policy and charging rules function node, the intermediate network nodes include at least one of a gateway node and path computation element function node, and the source network nodes are edge nodes. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A non-transitory computer-readable medium having stored thereon computer readable instructions for mitigating network overload conditions at a target network node in a communications network, wherein execution of the computer readable instructions by a processor causes the processor to perform operations comprising:
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collecting key performance indicators from a plurality of source network nodes; based on the key performance indicators collected from the plurality of source network nodes, and without using information from other nodes, computing probabilities of failure of each of the source network nodes; collecting key performance indicators from a plurality of intermediate network nodes, each intermediate network node receiving information from at least one of the source network nodes; based on the key performance indicators collected from the intermediate network nodes, and further based on the probabilities of failure of the source network nodes from which information is received, computing probabilities of failure of each of the intermediate network nodes; collecting key performance indicators from the target network node, the target network node receiving information from the intermediate network nodes; computing a probability of failure of the target network node based on the key performance indicators of the target network node and further based on the probabilities of failure of the intermediate network nodes, weighted by a closeness of relationships of the intermediate network nodes to the target network node; making a determination that the probability of failure of the target network node exceeds a threshold; and based on the determination, spawning a new instance of the target network node; wherein the target network node is a policy and charging rules function node, the intermediate network nodes include at least one of a gateway node and path computation element function node, and the source network nodes are edge nodes. - View Dependent Claims (14, 15, 16, 17)
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Specification