Patent ID: 9606219
Date: 2017-03-28
CPC Classifications: G01S

Claim:
1. A method for locating an object, the method comprising: establishing a bidirectional channel between the object and a master node of a network, wherein the master node is a stationary node, and the object is configured to communicate at least indirectly with the master node; using the bidirectional channel, synchronizing a clock maintained at the object and first and second clocks at respective first and second slave nodes, the synchronizing including transmitting at least one synchronization message that includes a timestamp, the synchronizing based on a common time base governed by a master clock at the master node, wherein the first and second slave nodes are stationary nodes; obtaining a first set of time-of-flight measurements using the common time base and one or more wireless signals sent between the object and the first and second slave nodes; estimating a first position of the object using the first set of time-of-flight measurements and location information of the first and second slave nodes; receiving non-location data at the object at the first position; transferring the non-location data to the first slave node; and storing the non-location data, the storing including associating the non-location data with the first position.