Patent ID: 9060342
Filing Date: 2015-06-16
Classification: G01S,H04W

Abstract:
1. A method of enabling a receiver including processor to passively determine its own position by receiving wireless messages within a wireless network, the method comprising: transmitting and receiving a plurality of messages between at least two pairs of nodes of known position within the wireless network; one node of each pair of nodes transmitting at least a transmit time of a first message transmitted by the one node and another message including a receive time at the one node of a reply message transmitted by the other node of the pair of nodes in response to the first message; passively receiving and decoding the plurality of messages transmitted between the at least two pairs of nodes at said receiver; and determining own position by said processor for said receiver from (i) the known positions of the at least two pairs of nodes, (ii) reception time at said receiver of each of the plurality of messages transmitted between the at least two pairs of nodes, and (iii) the transmit time of the first message and the receive time of the reply message at the one node transmitted by the one node to the other node of each pair of the at least two pairs of nodes.