US 12,143,205 B1
Unidirectional fast retraining of a bidirectional ethernet link
Seid Alireza Razavi Majomard, Belmont, CA (US); Ehab Tahir, Mississauga (CA); Ravi Pathakota, Fremont, CA (US); and Peter van Dyck, Brüggen (DE)
Assigned to MARVELL ASIA PTE LTD, Singapore (SG)
Filed by Marvell Asia Pte Ltd, Singapore (SG)
Filed on Mar. 9, 2023, as Appl. No. 18/119,295.
Claims priority of provisional application 63/318,648, filed on Mar. 10, 2022.
Int. Cl. H04L 1/00 (2006.01); H04L 25/03 (2006.01)
CPC H04L 1/0001 (2013.01) [H04L 25/03019 (2013.01)] 20 Claims
OG exemplary drawing
 
11. A method for communication comprising:
in an Ethernet Physical Layer (PHY) device for use in an Ethernet network in a vehicle,
communicating, by a local transceiver, with a peer PHY transceiver over a bidirectional Ethernet link in the vehicle, wherein the local transceiver supports communication modes that are separately configurable for transmission and reception, the communication modes being selected from (i) a data mode for communication of data, and (ii) a retraining mode for recovering from reception failure, wherein reception of retraining signals in the retraining mode is less sensitive to interference than reception of data signals in the data mode;
setting the local transceiver for data mode transmission to the peer PHY transceiver over the Ethernet link, and for data mode reception from the peer PHY transceiver over the Ethernet link in the data mode; and
in response to detecting that during data mode reception a reception quality of received signals has degraded to below a specified threshold, setting the local transceiver to reception in the retraining mode while concurrently transmitting to the peer PHY transceiver in the data mode.