Methods and systems for positioning based on observed difference of time of arrival

摘要

Disclosed are systems, methods and devices for computing an estimated location of a mobile device based, at least in part, on an observed difference of time of arrival of messages arriving at the mobile device. In particular implementations, such observed time arrival may comprise a difference between receipt at the mobile device a first message transmitted from a first transceiver device to a second transceiver device and receipt at the mobile device of a second message transmitted by the second transceiver device in response to the first message.

主权项

1. A method comprising, at a computing device:
obtaining a first parameter indicative, at least in part, of a difference between a time of receipt at a mobile device of a first message transmitted by a first transmitting device and a time of receipt at the mobile device of a second message transmitted by a second transmitting device in response to receipt of the first message at the second transmitting device; obtaining a second parameter indicative, at least in part, of a difference between a time of receipt at the mobile device of a third message transmitted by a third transmitting device and a time of receipt at the mobile device of a fourth message transmitted by a fourth transmitting device in response to receipt of the third message at the fourth transmitting device; and computing an estimated location of the mobile device based, at least in part, on the first parameter and the second parameter.