Patent ID: 9414196
Filing Date: 2016-08-09
CPC Classification: G01S,H04W

Claim Text:
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 one of nodes of a grid structure defined by a set of geometrically similar polygonal shapes representing geographically bounded Geocoded Vector Signature (GVS) tags that lie within a GVS region and an indexing procedure for determining the global locations of others of the nodes of the grid structure, ones of the identifiers being associated with ones of the nodes; and determining the location of the mobile device within the geographical area by identifying a match 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 GVS tags, wherein the identifiers of the number of Radio Frequency transmitters are reduced versions of corresponding Radio Frequency transmitter addresses; and determining the location of the mobile device comprises returning the location of a centre of one of the geometrically similar polygonal shapes of the grid structure when the identifier matches one of the reduced versions of the Radio Frequency transmitter addresses.