US 12,470,313 B2
Timestamping ethernet physical layer (PHY) frames
Xi Chen, Fremont, CA (US)
Assigned to Aeonsemi, Inc., Grand Cayman (KY)
Filed by Aeonsemi, Inc., Grand Cayman (KY)
Filed on Jan. 3, 2023, as Appl. No. 18/149,619.
Prior Publication US 2024/0223296 A1, Jul. 4, 2024
Int. Cl. H04J 3/06 (2006.01); G06F 12/123 (2016.01)
CPC H04J 3/0667 (2013.01) [G06F 12/123 (2013.01); H04J 3/0682 (2013.01); G06F 2212/154 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A method for timestamping packets by a timing synchronization controller of a communication device, comprising:
acquiring timing information indicating a time at which a physical coding sublayer (PCS) of the communication device outputs a first frame to a physical medium attachment (PMA) sublayer of the communication device;
determining a delay between the first frame and a packet having a preamble followed by a start frame delimiter (SFD);
generating a timestamp based at least in part on the timing information and the delay between the first frame and the packet; and
inserting the timestamp into the packet.