Method and system for PHY initiated wake-up in energy efficient ethernet networks
One or both link partners coupled via an Ethernet link may comprise a PHY device operable to initiate a wake-up interval. The PHY device may monitor parameters that may indicate Ethernet link status. Exemplary parameters may comprise a timer, communication performance metrics and/or configuration parameters. From a low power mode, the PHY device may generate a wake state idle symbol based on the monitoring and may communicate it to a local and/or a remote MAC. The local and/or remote MAC may establish a wake-up interval. The wake-up interval may comprise synchronization, circuit adaption and updating of communication parameters, which may enable control of noise cancellation functions and/or equalization functions. One or both of the link partners may transition to a low power mode after the wake-up interval and/or to an active state after the wake-up interval.
1. A method for communication, the method comprising:
in an Ethernet network comprising link partners that are coupled via an Ethernet link, each of said link partners comprise a physical layer device, wherein said physical layer device in one or both of said link partners is operable to perform:
monitoring one or more parameters which are indicative of a status of said Ethernet link and/or one or both of said link partners;
generating a wake state idle symbol, based on said monitoring; and
communicating said generated wake state idle symbol to a media access controller, wherein said media access controller establishes a wake-up interval based on said communicated wake state idle symbol and said wake state idle symbol is an Ethernet protocol idle symbol.
2. The method according to claim 1 , wherein said wake-up interval comprises one or more of synchronization, circuit adaption and updating of communication parameters.
3. The method according to claim 2 , comprising controlling noise cancellation functions based on said circuit adaption and/or said updating of communication parameters.
4. The method according to claim 2 , comprising controlling equalization functions based on said circuit adaption and/or said updating of communication parameters.
5. The method according to claim 1 , wherein said parameters which are indicative of a status comprise one or more of a timer, communication performance metrics and/or configuration parameters.
6. The method according to claim 1 , wherein said link partners are in a low power mode prior to said wake-up interval.
7. The method according to claim 1 , comprising communicating said wake state idle symbol to said media access controller which is local to said physical layer device which generated said wake state idle symbol.
8. The method according to claim 1 , comprising communicating said wake state idle symbol to said media access controller which is not local to said physical layer device which generated said wake state idle symbol.
9. The method according to claim 1 , comprising transitioning to a low power mode after said wake-up interval.
10. The method according to claim 1 , comprising transitioning to an active state after said wake-up interval.
11. A system for communication, the system comprising:
one or more circuits for use in an Ethernet network comprising link partners that are coupled via an Ethernet link, said one or more circuits in each of said link partners comprising one or more physical layer devices, wherein said one or more circuits in one or both of said link partners are operable to:
monitor one or more parameters which are indicative of a status of said Ethernet link and/or one or both of said link partners;
generate a wake state idle symbol based on said monitoring; and
communicate said generated wake state idle symbol to a media access controller, wherein said media access controller establishes a wake-up interval based on said communicated wake state idle symbol and said wake state idle symbol is an Ethernet protocol idle symbol.
12. The system according to claim 11 , wherein said wake-up interval comprises one or more of synchronization, circuit adaption and updating of communication parameters.
13. The system according to claim 12 , wherein said one or more circuits are operable to control noise cancellation functions based on said circuit adaption and/or said updating of communication parameters.
14. The system according to claim 12 , wherein said one or more circuits are operable to control equalization functions based on said circuit adaption and/or said updating of communication parameters.
15. The system according to claim 11 , wherein said parameters which are indicative of a status comprise-one or more of a timer, communication performance metrics and/or configuration parameters.
16. The system according to claim 11 , wherein said link partners are in a low power mode prior to said wake-up interval.
17. The system according to claim 11 , wherein said one or more circuits are operable to communicate said wake state idle symbol to said media access controller which is local to said physical layer device which generated said wake state idle symbol.
18. The system according to claim 11 , wherein said one or more circuits are operable to communicate said wake state idle symbol to said media access controller which is not local to said physical layer device which generated said wake state idle symbol.
19. The system according to claim 11 , wherein said one or more circuits are operable to transition to a low power mode after said wake-up interval.
20. The system according to claim 11 , wherein said one or more circuits are operable to transition to an active state after said wake-up interval.