Adaptive energy efficient Ethernet

Patent metadata

Field	Value
Publication number	US-10972293-B1
Application number	US-201816162751-A
Country	US
Kind code	B1
Filing date	Oct 17, 2018
Priority date	Oct 17, 2018
Publication date	Apr 6, 2021
Grant date	Apr 6, 2021

Abstract

An Ethernet transceiver is disclosed. The Ethernet transceiver includes transceiver circuitry having receiver circuitry to receive refresh signals during corresponding refresh cycles from a link partner during a low-power idle mode of operation. Each refresh signal has a refresh period, and where a quiet period is interposed between successive refresh cycles. Signal quality detection circuitry, during the low-power idle mode, determines a measure of signal quality associated with the received refresh signals. Subsequent refresh cycles exhibit at least one of an adjusted refresh period or an adjusted quiet period based on the measure of signal quality.

First claim

We claim:

1. An Ethernet transceiver, comprising:
transceiver circuitry including:
receiver circuitry to receive refresh signals from a link partner during a low-power idle mode of operation, each refresh signal having a refresh period and a quiet period, wherein the quiet period is interposed between successive refresh signals,
signal quality detection circuitry to, during the low-power idle mode, determine a measure of signal quality associated with the received refresh signals, and
circuitry to communicate to the link partner a signal based on the measure of signal quality of the received refresh signals for adjusting at least one of the refresh period or the quiet period.

2. The Ethernet transceiver of claim 1 , wherein the circuitry to communicate to the link partner a signal further comprises:
transmitter circuitry to transmit the signal based on the measure of signal quality to the link partner; and
wherein the signal is used by the link partner to adjust a time interval associated with the at least one of the refresh period or the quiet period.

3. The Ethernet transceiver of claim 1 , wherein:
the circuitry to communicate to the link partner a signal based on the measure of signal quality comprises transmitter circuitry to transmit at least one from the group comprising signal-to-noise ratio (SNR), bit error rate (BER), and a decoding error indicator.

4. The Ethernet transceiver of claim 1 , wherein:
the transceiver circuitry comprises 10GBASE-T transceiver circuitry.

5. The Ethernet transceiver of claim 1 , wherein:
the signal quality detection circuitry continuously determines signal quality associated with the received refresh signals and with subsequent refresh signals.

6. The Ethernet transceiver of claim 2 , wherein:
the transmitter circuitry transmits the signal based on the measure of signal quality as an inband control signal.

7. The Ethernet transceiver of claim 6 , wherein:
the transmitter circuitry transmits the inband control signal in accordance with an Operations, Administration and Maintenance (OAM) protocol.

8. An Ethernet network, comprising:
a network hub including multiple Ethernet ports;
multiple network devices coupled to the multiple Ethernet ports via multiple Ethernet data links;
wherein each of the multiple Ethernet data links includes an upstream path for transferring data from the network hub to a given network device, and a downstream path for transferring data from the given network device to the network hub; and
wherein each of the Ethernet data links is configurable to operate in a low-power idle mode of operation to transfer refresh signals along each link, each refresh signal having a refresh period, and a quiet period, wherein the quiet period is interposed between successive refresh signal, each link including
signal quality detection circuitry to, during the low-power idle mode, determine a measure of signal quality associated with the refresh signals, and
circuitry to communicate to a link partner a signal based on the measure of signal quality of the received refresh signals for adjusting at least one of the refresh period or the quiet period.

9. The Ethernet network of claim 8 , wherein:
the signal based on the measure of signal quality is transferred between respective link partners of each link as an inband control signal.

10. The Ethernet network of claim 8 , wherein:
the circuitry to communicate to the link partner a signal based on the measure of signal quality comprises transmitter circuitry to transmit at least one from the group comprising signal-to-noise ratio (SNR), bit error rate (BER), and a decoding error indicator.

11. The Ethernet network of claim 8 , wherein:
the network hub and the multiple network devices are disposed within the body of a motor vehicle.

12. The Ethernet network of claim 9 , wherein:
the inband control signal is transferred in accordance with an Operations, Administration and Maintenance (OAM) protocol.

13. The Ethernet network of claim 11 , wherein:
the multiple network devices generate data for use in an autonomous driving system.

14. A method of operation for an NBASE-T Ethernet transceiver, comprising:
receiving refresh signals from a link partner during a low-power idle mode of operation, each refresh signal having a refresh period, and a quiet period, wherein the quiet period is interposed between successive refresh signals,
during the low-power idle mode, determining a measure of signal quality associated with the received refresh signals, and
communicating to the link partner a signal based on the measure of signal quality of the received refresh signals for adjusting at least one of the refresh period or the quiet period.

15. The method of claim 14 , wherein the communicating a signal comprises:
transmitting information associated with the measure of signal quality to the link partner.

16. The method of claim 14 , wherein:
the communicating to the link partner a signal based on the measure of signal quality comprises communicating at least one signal from the group comprising signal-to-noise ratio (SNR), bit error rate (BER), and a decoding error indicator.

17. The method of claim 14 , wherein the receiving refresh signals comprises:
receiving refresh signals in accordance with a 10GBASE-T Ethernet transceiver protocol.

18. The method of claim 14 , wherein the determining comprises:
continuously determining signal quality associated with the received refresh signals and the subsequent refresh signals.

19. The method of claim 15 , wherein:
the transmitting of the information associated with the measure of signal quality is carried out by transmitting an inband control signal.

20. The method of claim 19 , wherein:
the transmitting of the information associated with the measure of signal quality is carried out by transmitting a signal in accordance with an Operations, Administration and Maintenance (OAM) protocol.

Assignees

• Aquantia Corp
• Marvell Asia Pte Ltd

Inventors

• Benyamin Saied
• Razavi Majomard Seid Alireza

Classifications

• H04L49/352

  Gigabit ethernet switching [GBPS] · CPC title

• Y02D30/50

  in wire-line communication networks, e.g. low power modes or reduced link rate · CPC title

• H04L12/40039

  Details regarding the setting of the power status of a node according to activity on the bus · CPC title

• H04L12/12 Primary

  Arrangements for remote connection or disconnection of substations or of equipment thereof · CPC title

• H04L12/10 Primary

  Current supply arrangements · CPC title