Patent ID: 7983185
Filing Date: 2011-07-19
Classification: G01S,H04J

Abstract:
1. A method of determining location and timing information of a local node in a network, the method comprising: receiving, at the local node, pings from a plurality of remote nodes in the network, each ping comprising: defining respective rates, with respect to an independent local clock within the local node, for periodically calculating location solutions and clock solutions based on the received pings, the location solutions calculated at a first rate and the clock solutions calculated at a second rate, the second rate being less than the first rate; for each ping received within a predetermined time interval: processing the transmit count stamps, the remote locations, the receive count stamps, the calculated relationships between the receive count stamps and the defined respective rates, and the local locations-corresponding to the respective pings received within the predetermined time interval to determine a plurality of clock solutions within the predetermined time interval for correlating the independent local clock with a network time, and to determine a plurality of location solutions within the predetermined time interval for estimating a new local location of the local node.