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

Claim 0:
1. A method of operating a network, the network having one or more nodes which are in communication with a server, the server including or being in communication with a high precision time source, the method comprising estimating a time delay between the server and each node, which comprises:
configuring a physical layer for transport of time protocol data between the server and each node 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.