Framework for temporal label switched path tunnel services
AssigneeFuturewei Technologies, Inc.
InventorHuaimo Chen
Life of this patent
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Abstract
A method for establishing a temporal label switched path (T-LSP) implemented in a node in a network. The method includes receiving a path request including a time interval and a set of constraints; obtaining traffic engineering information from a first database; computing, by the node, a path satisfying the time interval and the set of constraints based on the traffic engineering information obtained; storing the time interval and the set of constraints in a second database; and instructing an ingress node of the temporal LSP to signal the temporal LSP in the network along the path computed at a start of the time interval identified in the path request and to tear down the temporal LSP at an end of the time interval identified in the path request.
Claims14
A method for establishing a temporal label switched path (LSP) implemented in a software defined network (SDN) controller in a network, comprising:
- receiving, at the SDN controller, a path request for the temporal LSP, the path request identifying a time interval defining an LSP creation time and tear down time and a set of constraints;
- computing a path for the temporal LSP that satisfies the time interval and the set of constraints based on traffic engineering information obtained from a first database, the temporal LSP being scheduled for carrying traffic in the time interval that crosses multiple domains and is computed in accordance with communications with a second controller that is responsible for a second domain of the multiple domains;
- sending, to an ingress node of the temporal LSP in the network, a single message to set up the temporal LSP at the defined creation time and to tear down at the defined tear down time, the temporal LSP at an end of the time interval identified in the path request;
- and
- setting up and tearing down the temporal LSP based on the single message.
A software defined network (SDN) controller comprising:
- a memory storage comprising instructions;
- and
- a processor in communication with the memory, wherein the processor executes the instructions to cause the network controller to:
- receive, at the SDN controller, a path request for the temporal label switched path (LSP), the path request identifying a time interval defining an LSP creation time and tear down time and a set of constraints;
- compute a path for the temporal LSP that satisfies the time interval and the set of constraints based on traffic engineering information obtained from a first database, the temporal LSP being scheduled for carrying traffic in the time interval cross multiple domains and computed in accordance with communications with a second controller that is responsible for a second domain of the multiple domains;
- sending, to an ingress node of the temporal LSP in the network, a single message to set up the temporal LSP at the defined creation time and to tear down at the defined tear down time the temporal LSP at an end of the time interval identified in the path request;
- and
- setting up and tearing down the temporal LSP based on the single message.
Dependencies are inferred from the claim text.