CPC G01S 7/4865 (2013.01) [G01S 5/0081 (2013.01); G01S 5/0221 (2013.01); G01S 5/0252 (2013.01); G01S 5/14 (2013.01); H04W 64/00 (2013.01)] | 8 Claims |
1. A method, at an information processing system, for determining a position of a portable electronic device, the method comprising:
receiving, by the information processing system, a positioning request from a portable electronic device, wherein the positioning request is associated with a defined area comprising a plurality of wireless nodes, each wireless node in the plurality of wireless nodes being situated at a given location within the defined area, wherein the plurality of wireless nodes is arranged in an x-y configuration forming a sparse grid, the sparse grid comprising a plurality of sections where each section is defined by a transmission signature corresponding to a wireless node grouping from the plurality of wireless nodes, and where the positioning request comprises the transmission signature detected by the portable electronic device for at least one section of the plurality of sections;
responsive to a determination that the transmission signature within the positioning request is detectable within multiple sections of the plurality of sections, determining, by the information processing system, that a first section of the multiple sections adjacent to a last known position of the portable electronic device comprises an interior structure and a second section of the multiple sections adjacent to the last known position is without an interior structure; and
selecting, by the information processing system, the first section as a current position of the portable electronic device in response to determining that the first section is adjacent to the last known position and is without an interior structure.
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