Patent ID: 11962403
Assignee: CISCO TECHNOLOGY, INC.
Field: Telecommunications (Electrical engineering)
Classification: CPC H | IPC H

Claim 14:
15. A system comprising:
a network having one or more nodes; and
a server in communication with the one or more nodes, and including or being in communication with a high precision time source, wherein the server estimates a time delay between the server and each of the one or more nodes in the network by:
configuring a physical layer for transport of time protocol data between the server and each of the one or more nodes;
initiating a delay request from the server which is transported over the physical layer to a node of the one or more nodes, wherein a first timestamp for the delay request is recorded from the high precision time source;
receiving at the server a delay response from the node receiving the delay request, wherein a second timestamp for the delay response is recorded from the high precision time source, wherein the delay response is a passive reflection of the delay request from the node back to the server; and
estimating the time delay between the server and the node from half of a time difference between the first and second timestamps.