Patent ID: 8224350
Filing Date: 2012-07-17
Classification: G01S,G06F,H04W

Abstract:
1. A method of determining the location of a portable device, comprising: obtaining identities of wireless communication devices detectable by the portable device at a particular location which is to be determined, thereby to obtain a set of identities; comparing the set of identities with the content of a database, which database stores a plurality of findings, to select one or more findings; each finding comprising a reference location and a set of identities of wireless communication devices sighted at that location; and determining the location of the portable device based on processing the selected findings, comprising selecting a location based on one or more reference locations, wherein the reference locations to be used are those associated with findings based on: the number of devices associated to the finding which correspond to identities in the set; the number of devices associated to the finding which do not correspond to any identities in the set; and the number of identities in the set which are not identified in the database as being associated to the finding.