Patent ID: 8811199
Filing Date: 2014-08-19
Classification: H04W

Abstract:
1. A method for locating a node within a wireless mesh network comprising: measuring, by a first node, a first calibration count multiplier based upon an error in count value over a given time period; measuring, by a second node, a second calibration count multiplier based upon an error in count value over a given time period; transmitting a first message by the first node; receiving the first message by the second node; transmitting a second message by the second node; receiving the second message by the first node; measuring a first elapsed time from a beginning of transmitting the first message to a beginning of receiving the second message; measuring a second elapsed time from a beginning of receiving the first message to a beginning of transmitting the second message; transmitting a third message by the second node containing the second elapsed time; receiving the third message by the first node; and calculating a distance between the first and second nodes based upon the first and second elapsed times and the first and second calibration count multipliers; wherein the second calibration count multiplier is contained in either the second or third message.