Power and traffic optimized methods of operating rf access systems

Abstract

There is described a method of operating an RF access system, the system comprising an anchor arranged at a predetermined location and configured to communicate with one or more key devices. The method comprises: operating the anchor in a first mode, the first mode comprising first RF ranging operations for determining a first ranging result for the anchor relative to a key device; determining whether the first ranging result fulfils a predetermined condition; if the first ranging result fulfils the predetermined condition, operating the anchor in a second mode, the second mode comprising second RF ranging operations for determining a second ranging result for the anchor relative to the key device, and RF radar operations for determining a radar result for the anchor relative to a holder of the key device; and determining position information associated with the key device based on the second ranging result and the radar result. Furthermore, a method of operating an RF access system comprising a plurality of anchors is described. Finally, RF access systems configured to perform the methods are described.

Dependencies are inferred from the claim text.