Patent ID: 9654930
Date: 2017-05-16
CPC Classifications: G01S,H04W

Claim:
1. A method of determining a location of a mobile device, comprising: detecting, at the mobile device, at least one Radio Frequency transmitter; comparing an identifier associated with the at least one detected Radio Frequency transmitter with identifiers of a number of Radio Frequency transmitters located within a geographical area, global locations associated with the identifiers having been decoded from information received at the mobile device prior to detection of the at least one Radio Frequency transmitter at the mobile device, the information comprising a global location of a single node of a geographically bounded tag of a region that covers the geographical area and an indexing procedure for determining global locations of other nodes of other geographically bounded tags of the region, the geographically bounded tags represented by a set of geometrically similar polygonal shapes of a grid structure, ones of the identifiers of the number of Radio Frequency transmitters associated with ones of the nodes; and determining the location of the mobile device by identifying a matching node between the identifier associated with the at least one detected Radio Frequency transmitter and one of the identifiers of the number of Radio Frequency transmitters associated with one of the nodes of the geographically bounded tags; wherein the identifiers of the number of Radio Frequency transmitters are reduced versions of corresponding Radio Frequency transmitter addresses and the location of the mobile device is determined based on a weighted average when the identifier associated with the at least one detected Radio Frequency transmitter is associated with more than one node.