Patent ID: 8559412
Filing Date: 2013-10-15
Classification: G06F,H04J,H04W

Abstract:
1. A method comprising: receiving, at a first node in a network, a timing packet containing time information, the timing packet originated by a time server and including a field updated to reflect cumulative delays as the timing packet traverses the network; updating, by the first node, the time information in the timing packet to reflect a cumulative delay associated with communicating the timing packet to the first node over a network link to which the first node is connected; sending, by the first node, the timing packet with the updated time information to a second node to enable the second node to use the updated time information for synchronization of the second node; determining a delay experienced by the timing packet in transit through the first node and updating, by the first node, the time information in the timing packet to further reflect the delay associated with transit of the timing packet through the first node; wherein determining the delay experienced by the timing packet in transit through the first node is based on a counter that is clocked by a local clock device of the first node, wherein the local clock device of the first node has lower accuracy than a clock device associated with the time server.