Patent ID: 8669862

Claim:
A portable device for obtaining location information within a building, comprising: a local area network interface operably coupled to communicate with neighboring wired and wireless devices; a processing module operably coupled to: obtain through the local area network interface the location information regarding the portable device from one or more of the neighboring wired and wireless devices, the location information comprising at least geographic coordinates, building information and geographic relationship information between the portable device and at least one of the one or more neighboring wired and wireless devices; wherein the geographic relationship information includes distance and angle between the portable device and the one or more neighboring portable devices in the building; determine whether existing location information regarding the portable device is insufficient to determine the geographic coordinates, the existing location information comprising at least a portion of raw geographic location data; when the existing location information is insufficient, generate a query message requesting location information including at least another portion of raw geographic location data from at least one neighboring device; receive a response regarding the query message; when the response collectively includes sufficient location information when combined with the existing location information, determine the location information regarding the portable device; and convert the location information into a location signal; and a radio section operably coupled to: convert the location signal into a location wireless signal; and transmit, within a local coverage area, the location wireless signal.