OTN switching systems and methods using an SDN controller and match/action rules

Patent metadata

Field	Value
Publication number	US-9680588-B2
Application number	US-201414301728-A
Country	US
Kind code	B2
Filing date	Jun 11, 2014
Priority date	Jun 11, 2014
Publication date	Jun 13, 2017
Grant date	Jun 13, 2017

Abstract

A method and network include receiving a Time Division Multiplexing (TDM) connection; determining information in overhead of the TDM connection; and if match/action rules defined by controller exist for the TDM connection, establishing the TDM connection based on matching an associated rule in the match/action rules. A Software Defined Networking (SDN) controller is configured to receive a request from a node related to a new TDM connection in the network; determine one or more routes in the network for the new TDM connection; determine match/action rules for the one or more routes at associated nodes of the one or more nodes; if the one or more routes include at least two routes, determine a group table at associated nodes of the one or more nodes to distinguish between the at least two routes; and provide the match/action rules and the group table to the associated nodes.

First claim

What is claimed is:

1. A method, comprising:
receiving a Time Division Multiplexing (TDM) connection comprising an Optical Transport Network (OTN) connection;
determining information in OTN overhead of the TDM connection, wherein the information comprises source and destination addressing of the TDM connection and a route included in a Trail Trace Identifier (TTI) in the OTN overhead; and
if match/action rules defined by a Software Defined Networking (SDN) controller exist for the TDM connection, establishing the TDM connection based on matching an associated rule in the match/action rules with the information, wherein the SDN controller establishes the match/action rules to create and switch the TDM connection.

2. The method of claim 1 , further comprising:
establishing the TDM connection by creating cross-connects for the TDM connection based on the match/action rules.

3. The method of claim 1 , further comprising:
if match/action rules do not exist for the TDM connection, sending a request to the SDN controller for the SDN controller to determine a path and provide the match/action rules.

4. The method of claim 3 , further comprising:
subsequent to the sending the request, receiving the match/action rules from the SDN controller; and
creating cross-connects for the TDM connection based on the match/action rules.

5. The method of claim 1 , further comprising:
subsequent to the establishing, utilizing a group table to implement protection of the TDM connection at end nodes.

6. The method of claim 1 , wherein the information comprises the Trail Trace Identifier (TTI) and associated fields comprising a Source Access Point Identifier (SAPI) and a Destination Access Point Identifier (DAPI).

7. The method of claim 6 , wherein the associated fields further comprise an Operator Specific field used to specify a route in the network.

8. The method of claim 1 , wherein the information comprises a Multiplex Structure Identifier (MSI) table, and further comprising:
detecting a new connection based on a presence of new data in the MSI table denoting a connection rate and tributary port number.

9. The method of claim 1 , wherein the SDN controller utilizes OpenFlow.

10. The method of claim 1 , wherein the TDM connection comprises a Synchronous Optical Network (SONET) or Synchronous Digital Hierarchy (SDH) connection.

11. A Software Defined Networking (SDN) controller, comprising:
a network interface communicatively coupled to one or more nodes in a network;
a processor communicatively coupled to the network interface; and
memory storing instructions that, when executed, cause the processor to:
receive a request from a node related to a new Time Division Multiplexing (TDM) connection in the network comprising an Optical Transport Network (OTN) connection;
determine one or more routes in the network for the new TDM connection;
determine match/action rules for the one or more routes at associated nodes of the one or more nodes;
if the one or more routes comprise at least two routes, determine a group table at associated nodes of the one or more nodes to distinguish between the at least two routes; and
provide the match/action rules and the group table if the one or more routes comprise the at least two routes to the associated nodes, wherein the SDN controller establishes the match/action rules to create and switch the TDM connection, and wherein the associated nodes utilize the match/action rules and source and destination addressing and a route of the TDM connection included in a Trail Trace Identifier (TTI) in the OTN overhead of the TDM connection for establishment thereof.

12. The controller of claim 11 , wherein the SDN controller utilizes OpenFlow.

13. The controller of claim 11 , wherein the new TDM connection comprises a Synchronous Optical Network (SONET) or Synchronous Digital Hierarchy (SDH) connection.

14. A network, comprising:
a plurality of nodes;
a plurality of links interconnecting the nodes via Time Division Multiplexing (TDM); and
a Software Defined Networking (SDN) controller communicatively coupled to one or more of the plurality of nodes;
wherein each of the plurality of nodes are configured to:
receive a Time Division Multiplexing (TDM) connection comprising an Optical Transport Network (OTN) connection;
determine information in OTN overhead of the TDM connection, wherein the information comprises source and destination addressing and a route of the TDM connection included in a Trail Trace Identifier (TTI) in the OTN overhead;
if match/action rules exist for the TDM connection, establish the TDM connection based on matching an associated rule in the match/action rules with the information; and
if match/action rules do not exist for the TDM connection, send a request to the controller for the controller to determine a path and provide the match/action rules, wherein the SDN controller establishes the match/action rules to create and switch the TDM connection.

15. The network of claim 14 , wherein the controller is configured to:
receive the request related to a new Time Division Multiplexing (TDM) connection in the network comprising an Optical Transport Network (OTN) connection;
determine one or more routes in the network through associated nodes of the plurality of nodes for the new TDM connection;
determine match/action rules for the one or more routes;
if the one or more routes comprise at least two routes, determine a group table to distinguish between the at least two routes; and
provide the match/action rules and the group table if the one or more routes comprise the at least two routes to the associated nodes.

Assignees

• Connolly Matthew W
• Oltman John K
• Ciena Corp

Inventors

• Connolly Matthew W
• Oltman John K

Classifications

• H04Q2011/0033

  using time division switching · CPC title

• H04J3/12

  Arrangements providing for calling or supervisory signals · CPC title

• H04J3/1652 Primary

  Optical Transport Network [OTN] · CPC title

• H04L45/42

  Centralised routing · CPC title

• H04J2203/0058

  Network management, e.g. Intelligent nets · CPC title