Method and apparatus for determining location information of a position in a multi-storey building
US8385943B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 2, 2012 |
| Grant date | Feb 26, 2013 |
| Priority date | — |
| Expiry date | May 2, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W4/33
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for determining location information of a position in a multi-storey building, the method comprising: retrieving observation data comprising observed addresses and corresponding observed received signal strengths of wireless access points detected at the position from a memory; retrieving, for each storey of the building, a radio map comprising a plurality of location points in the respective storey of the building from a database, each location point comprising addresses and corresponding mean received signal strengths of wireless access points detected at the location point and coordinates of the location point; selecting one or more location points comprising the observed addresses from the radio map; determining a storey estimate of the position by calculating a sum probability for each storey of the building, the sum probability being calculated by summing all individual probabilities of each observed address contained in each selected location point in the radio map of the respective storey being detected on the respective storey; and setting the storey estimate as the storey of the building having highest value of the calculated sum probability, wherei…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.