Patent ID: 9667370
Date: 2017-05-30
CPC Classifications: H04J,H04L

Claim:
1. A synchronization method, comprising: generating, by a first network entity, an ingress timestamp corresponding to a time at which a first packet is received by the first network entity; inserting the ingress timestamp in the first packet; generating, by a precision time protocol (PTP) device of the first network entity, a second packet in response to the first packet, wherein the second packet includes a timestamp generation command; generating, by a network physical layer (PHY) of the first network entity, an egress timestamp responsive to the timestamp generation command, the egress time stamp corresponding to a time at which the second packet is transmitted by the network PHY of the first network entity; inserting, by the network PHY of the first network entity, the egress timestamp into a third packet; and transmitting, by the network PHY of the first network entity, the third packet to a second network entity.