Method and system for dynamically determining when to train Ethernet link partners to support energy efficient Ethernet networks

摘要

Training, refreshing and/or updating Ethernet link partners for silent channels and/or silent directions of channels may be determined based on control parameters. This may be used to improve energy efficiency in Ethernet communication. Control parameters may comprise a default value and/or may be determined based on prior training, refreshing and/or updating. New values for the control parameters may be generated based on a magnitude of change between current and prior control parameter values or based on performance such as bit error rate. User input may be utilized to determine when to execute the training, refreshing and/or updating. The training, refreshing and/or updating may be done for one or more of a near-end crosstalk canceller, alien near-end crosstalk canceller, far-end crosstalk canceller, alien far-end crosstalk canceller and echo canceller. After the training, refreshing and/or updating, the silent channels may transition to active and/or may remain silent.

主权项

1. A method, comprising:
in a first physical layer device that is coupled via a communication link having a plurality of communication channels to a second physical layer device, wherein during a low power mode of the first physical layer device, a first subset of the plurality of communication channels is in an active state that enables communication at a first transmission rate and a second subset of the plurality of communication channels is in a low power state that enables communication at a second transmission rate lower than the first transmission rate: prior to a decision to transition at least one of the second subset of the plurality of communication channels from the low power state to the active state, determining, based on an analysis of one or more control parameters based on a communication performance measured on at least one of the first subset of the plurality of communication channels in the active state, when to cause a triggering of training of parameters of operation of one or more of a near-end crosstalk canceller, an alien near-end cross talk canceller, a far-end cross talk canceller, an alien far-end cross talk canceller and an echo canceller used by at least one of the second subset of the plurality of communication channels; and executing the training of parameters of operation based on the determination.