Abstract: A system for estimating the location of a mobile device is discussed herein. In one embodiment, the system can include a mobile device having a processor and a receiver, and a network of transceiver devices. The transceiver devices can be paired into multiple transceiver pairs of transceiver devices within communication range. The mobile device and transceivers can transmit a range request (REQ) packet by one transceiver in a pair; receive the REQ packet by another transceiver in the pair; transmit a range response (RSP) packet by the another transceiver; receive REQ packets by the mobile device; and receive RSP packets by the mobile device. The system is configured to estimate the differences of distances from the mobile node to the first and the second transceiver node in pairs; and to determine a location of the mobile device based on the estimated distance differences of devices.

Abstract: A method traces a route in a wireless network including nodes. A trace packet is generated in a tracer node. The trace packet includes addresses of a source node and a destination node in a route. The trace packet is sent from the tracer node to the source node, and then along the route to the destination node. In response to receiving the trace packet in each node along the route, a report packet is sent to the tracer node.