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PROBE BASED RESIZING OF ODUFLEX CONNECTIONS

IP.com Disclosure Number: IPCOM000248845D
Publication Date: 2017-Jan-17

Publishing Venue

The IP.com Prior Art Database

Abstract

The present disclosure relates to probe based resizing of Optical channel Data Unit (ODU) Flexible (ODUflex) connections. In particular, the present disclosure utilizes a probe action end-to-end of the path prior to a resize to guarantee the availability of M+N bandwidth (M current size, N additional bandwidth for resize) within a Link Aggregated Group (LAG) network. The feedback data returned by the probe action can be used by a source node to determine action on the resize as well as evaluate an alternate, new path. The probe action is applicable to ITU Recommendation G.7044/Y.1347 (G.HAO) and control plane networks.

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PROBE BASED RESIZING OF ODUFLEX CONNECTIONS

ABSTRACT

The present disclosure relates to probe based resizing of Optical channel Data Unit (ODU) Flexible (ODUflex) connections.  In particular, the present disclosure utilizes a probe action end-to-end of the path prior to a resize to guarantee the availability of M+N bandwidth (M current size, N additional bandwidth for resize) within a Link Aggregated Group (LAG) network.  The feedback data returned by the probe action can be used by a source node to determine action on the resize as well as evaluate an alternate, new path.  The probe action is applicable to ITU Recommendation G.7044/Y.1347 (G.HAO) and control plane networks.

DETAILED DESCRIPTION

Again, in various exemplary embodiments, the present disclosure relates to probe based resizing of Optical channel Data Unit (ODU) Flexible (ODUflex) connections.  In particular, the present disclosure utilizes a probe action end-to-end of the path prior to a resize to guarantee the availability of M+N bandwidth (M current size, N additional bandwidth for resize) within a Link Aggregated Group (LAG) network.  The feedback data returned by the probe action can be used by a source node to determine action on the resize as well as evaluate an alternate, new path.  The probe action is applicable to ITU Recommendation G.7044/Y.1347 (G.HAO) and control plane networks.

Optical Transport Network (OTN) is defined in various ITU Specifications such as, for example, ITU G.709/Y.1331 “Interfaces for the Optical Transport Network (OTN),” the contents of which are herein incorporated by reference.  OTN allows network operators to converge networks through seamless transport of the numerous types of legacy protocols while providing the flexibility required to support future client protocols.  Standards for Optical Transport Networks (OTN) have been extended to support a flexible rate Optical channel Data Unit (ODU) called ODUflex (GFP) (Generic Framing Procedure) to support the transport of variable packet rates and ODUflex (CBR) (Constant Bit Rate) to support fixed bit rates, of varying size.  ODUflex is not only flexible but may be resized in a hitless manner, that is, their rate may be increased or decreased in fixed increments while carrying but without affecting service.  Optical transport bandwidth used to connect geographically separated packet switching sites currently needs to be provisioned to accommodate the peak demand. This can be inefficient when peak demand far exceeds typical demand. The current state of the art for ODUflex resizing is to implement the standard ODUflex resizing algorithms defined in ITU Recommendation G.7044/Y.1347 “Hitless Adjustment of ODUflex (GFP)” (HAO), the contents of which are herein incorporated by reference.

Exemplary network

Referring to FIG. 1, in an exemplary embodiment, a network diagram illustrates an exemplary network 10 with various interconnected nodes 12 (illustrated as nodes 12A – 12J).  The no...