Patent ID: 8254264
Filing Date: 2012-08-28
Classification: H04L

Abstract:
1. A method for estimating latency between a first node and a second node comprising: sending a first signal from the first node to a landmark node along a first path; sending a second signal from the second node to the landmark node along a second path; wherein the second node is on the path between the first node and the landmark node; identifying a common milestone on the first and second paths, wherein the common milestone is a node on the first path between the first node and the landmark node, and on the second path between the second node and the landmark node; determining a first distance from the first node to the common milestone; determining a second distance from the second node to the common milestone; and estimating the latency based on the first and second distances by: determining a common milestone that is positioned such that the second node is on a shortest path between the first node and the common milestone by subtracting the first distance from the second distance.