Software defined networking methods

Patent metadata

Field	Value
Publication number	US-10979741-B2
Application number	US-201815992015-A
Country	US
Kind code	B2
Filing date	May 29, 2018
Priority date	Dec 15, 2014
Publication date	Apr 13, 2021
Grant date	Apr 13, 2021

Abstract

Systems and methods presented herein provide for a software defined network (SDN) controller in a cable television system that virtualizes network elements in the cable television system to provide content delivery and data services through the virtualized network elements. In one embodiment, the SDN controller is operable in a cloud computing environment to balance data traffic through the virtualized network elements. For example, the SDN controller may abstract Layer 2 Control Protocol (L2CP) frame processing of the network elements into the cloud computing environment to relieve the network elements from the burdens of Ethernet frame processing. In this regard, the SDN controller comprises a L2CP decision module that determines how L2CP should be processed for the network elements in the cable television system.

First claim

What is claimed is:

1. A method for processing a Layer 2 Control Protocol (L2CP) at a network element, comprising:
receiving a first L2CP frame at the network element;
transmitting the first L2CP frame from the network element to a L2CP module of a software defined network (SDN) controller, the L2CP module being logically separate from the network element;
receiving, at the network element, L2CP instructions from the L2CP module for processing the first L2CP frame, wherein the L2CP instructions include instructions to direct the first L2CP frame to a protocol entity; and
processing, at the network element, the first L2CP frame according to the L2CP instructions.

2. The method of claim 1 , wherein the L2CP instructions include instructions to pass the first L2CP frame to a virtual connection.

3. A method for supporting handling of a Layer 2 Control Protocol (L2CP), comprising:
receiving, at a L2CP module of a software defined network (SDN) controller, a first L2CP frame from a first network element that is logically separate from the L2CP module;
at the L2CP module, generating first L2CP instructions for instructing the first network element how to process the first L2CP frame, wherein generating the first L2CP instructions comprises considering configuration values of L2CP service attributes within the first L2CP frame to generate the first L2CP instructions; and
transmitting the first L2CP instructions from the SDN controller to the first network element.

4. The method of claim 3 , further comprising:
receiving, at the L2CP module of the SDN controller, a second L2CP frame from a second network element different from the first network element;
at the L2CP module, generating second L2CP instructions for instructing the second network element how to process the second L2CP frame; and
transmitting the second L2CP instructions from the SDN controller to the second network element.

5. The method of claim 3 , further comprising updating L2CP standards in the L2CP module.

6. The method of claim 3 , wherein generating first L2CP instructions comprises considering a protocol identifier of the first L2CP frame to generate the first L2CP instructions.

7. The method of claim 3 , further comprising hosting the SDN controller in a cloud computing environment.

8. A method for processing a Layer 2 Control Protocol (L2CP) at a network element, comprising:
receiving a first L2CP frame at the network element;
transmitting the first L2CP frame from the network element to a L2CP module of a software defined network (SDN) controller, the L2CP module being logically separate from the network element;
at the L2CP module, generating first L2CP instructions for instructing the network element how to process the first L2CP frame, wherein generating first L2CP instructions comprises considering configuration values of L2CP service attributes within the first L2CP frame to generate the first L2CP instructions;
transmitting the first L2CP instructions from the SDN controller to the network element; and
processing, at the network element, the first L2CP frame according to the first L2CP instructions.

9. The method of claim 8 , wherein the first L2CP instructions include instructions to pass the first L2CP frame to a virtual connection.

10. The method of claim 8 , further comprising updating L2CP standards in the L2CP module.

11. The method of claim 8 , wherein generating the first L2CP instructions comprises considering a protocol identifier of the first L2CP frame to generate the first L2CP instructions.

12. The method of claim 8 , further comprising hosting the SDN controller in a cloud computing environment.

13. A method for processing a Layer 2 Control Protocol (L2CP) at a network element, comprising:
receiving a L2CP frame at the network element;
transmitting the L2CP frame from the network element to a L2CP module of a software defined network (SDN) controller, the L2CP module being logically separate from the network element;
receiving, at the network element, L2CP instructions from the L2CP module for processing the L2CP frame, wherein the L2CP instructions include instructions to discard the L2CP frame; and
processing, at the network element, the L2CP frame according to the L2CP instructions.

Assignees

• Cable Television Laboratories Inc

Inventors

• Kim James
• Sundaresan Karthik
• Kee Thomas

Classifications

• H04N21/241

  Operating system [OS] processes, e.g. server setup · CPC title

• H04N21/238

  Interfacing the downstream path of the transmission network, e.g. adapting the transmission rate of a video stream to network bandwidth; Processing of multiplex streams {(hybrid fiber coaxial [HFC] networks for downstream channel allocation for video distribution H04L12/2801; flow control in packet networks H04L47/10; real-time communication protocols in data switching networks H04L65/00; scheduling or organising the servicing of application requests H04L67/60)} · CPC title

• H04N21/643

  Communication protocols {(network streaming protocols, e.g. real-time transport protocol [RTP] or real-time control protocol [RTCP], H04L65/65)} · CPC title

• H04N21/6118

  involving cable transmission, e.g. using a cable modem · CPC title

• H04N21/2402

  Monitoring of the downstream path of the transmission network, e.g. bandwidth available (traffic monitoring in data switching networks H04L43/00; monitoring data switching networks utilization H04L43/0876) · CPC title