Hitless service in a variable rate optical transponder

Patent metadata

Field	Value
Publication number	US-9479446-B2
Application number	US-201414479398-A
Country	US
Kind code	B2
Filing date	Sep 8, 2014
Priority date	Sep 11, 2013
Publication date	Oct 25, 2016
Grant date	Oct 25, 2016

Abstract

Methods and systems for variable rate control include determining a new communications rate in response to measured data traffic patterns. A receive change message is transmitted to a receiver that triggers the receiver to wait for an end of transmission (EoT) message and to set a new communications rate. A transmit change message is transmitted to a transmitter that triggers the transmitter to send the EoT message to the receiver, to set the new communications rate, and to send a start of transmission (SoT) message to the receiver before resuming data communications.

First claim

The invention claimed is:

1. A receiver, comprising:
a variable rate transponder that provides data communications at a configurable rate; and
a hitless service provisioning (HSP) module configured to set a new communications rate of the variable rate transponder in response to the receipt of an end of transmission (EoT) message and to trigger a resumption of communications at the new rate in response to the receipt of a start of transmission (SoT) message,
wherein the transponder receives a training pattern prior to receipt of the SoT message to train for a connection resumption;
wherein the HSP module is further configured to set the new communications rate based on received instructions from a centralized controller and receive the instructions prior to reception of the EoT message.

2. The receiver of claim 1 wherein the HSP module receives the instructions on an out-of-band channel different from that on which the variable rate transponder operates.

3. The receiver of claim 1 wherein the HSP module receives the instructions on an in-band channel that the transponder uses for data communication.

4. A transmitter, comprising:
a variable rate transponder that provides data communications at a configurable rate; and
a hitless service provisioning (HSP) module configured to trigger the transmission of an end of transmission (EoT) message, to set a new communications rate of the variable rate transponder, to trigger the transmission of a training pattern after setting the new communications rate of the variable rate transponder, to trigger the transmission of a start of transmission (SoT) message, and to trigger a resumption of communications following transmission of the SoT message;
wherein the HSP module is further configured to set the new communications rate based on received instructions from a centralized controller and receive the instructions prior to reception of the EoT message.

5. The transmitter of claim 4 , wherein the HSP module receives the instructions on an out-of-band channel different from that on which the variable rate transponder operates.

6. The transmitter of claim 4 , wherein the HSP is further configured to determine the new communications rate and to trigger the transmission of the new communications rate on an in-band channel that the transponder uses for data communications.

7. The transmitter of claim 4 , wherein the HSP is further configured to continue the transmission of the training pattern for a duration that exceeds an expected time of receiver reconfiguration.

Assignees

• Nec Lab America Inc
• Nec Corp

Inventors

• Hu Junqiang
• Kanonakis Konstantinos
• Wang Ting
• Ji Philip

Classifications

• H04Q2011/0086

  Network resource allocation, dimensioning or optimisation · CPC title

• H04L47/225

  Determination of shaping rate, e.g. using a moving window · CPC title

• H04B10/40

  Transceivers · CPC title

• H04L47/25 Primary

  with rate being modified by the source upon detecting a change of network conditions · CPC title

• H04Q11/0062

  Network aspects · CPC title