Path Computation Element Central Controllers (PCECCs) for Network Services
AssigneeFuturewei Technologies, Inc.
InventorsQianglin Quintin Zhao, Renwei Li
Life of this patent
Estimating the term…
Abstract
A method implemented by a path computation element centralized controller (PCECC), the method comprises: receiving a service request to provision for a service from a first edge node and a second edge node in a network; computing a path for a label switched path (LSP) from the first edge node to the second edge node in response to the service request; reserving label information for forwarding traffic of the service on the LSP; and sending a label update message to a third node on the path to facilitate forwarding of the traffic of the service on the path, wherein the label update message comprises the label information.
Claims21
A method comprising:
- receiving, by a path computation element centralized controller (PCECC), a service request to provision for a service from a first edge node and a second edge node in a network;
- computing, by the PCECC, a path for a label switched path (LSP) from the first edge node to the second edge node in response to the service request;
- reserving, by the PCECC, label information for forwarding traffic of the service on the LSP;
- and
- sending, by the PCECC, a label update message to a third node on the path to facilitate forwarding of the traffic of the service on the path, wherein the label update message comprises the label information.
A path computation element centralized controller (PCECC) comprising:
- a receiver configured to receive a request to create a service from a first edge node to a second edge node in a network;
- a processor coupled to the receiver and configured to:
- compute a path for a label switched path (LSP) from the first edge node to the second edge node in response to the request;
- and
- reserve label information for forwarding traffic of the service on the LSP;
- and
- a transmitter coupled to the processor and configured to send a label update message to a third node on the path to facilitate forwarding of the traffic of the service on the path, wherein the label update message comprises the label information.
A network element (NE) comprising:
- a receiver configured to:
- receive, from a path computation element centralized controller (PCECC), a forwarding instruction for forwarding traffic of a service on a label switched path (LSP) in a network, wherein the forwarding instruction indicates a first label identifying the service in the network;
- and
- receive a data packet associated with the traffic;
- a processor coupled to the receiver and configured to attach the first label to the data packet;
- and
- a transmitter coupled to the processor and configured to forward the data packet to a next hop node on a path of the LSP according to the forwarding instruction.
A system comprising:
- a path computation element centralized controller (PCECC) configured to:
- compute a path for a label switched path (LSP) from a first edge node to a second edge node;
- reserve label information for forwarding traffic of a service on the LSP;
- transmit a label update message comprising the label information;
- a network element (NE) located on the path and configured to:
- receive the label update message from the PCECC;
- receive a data packet associated with the traffic;
- attach the label information to the data packet;
- and
- transmit the data packet to a next hop node on the path according to the label update message.
Dependencies are inferred from the claim text.