{
  "$type": "site.standard.document",
  "description": "Embodiments for performing an indoor navigation are disclosed. In one embodiment, a location based service system includes: a plurality of access points installed in an indoor environment and configured to send Wi-Fi signals including access point identification information; a mobile terminal…",
  "path": "/patents/990395",
  "publishedAt": "2013-05-29T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "G01C21/206",
    "KOREA TRADE NETWORK [KR]"
  ],
  "textContent": "Embodiments for performing an indoor navigation are disclosed. In one embodiment, a location based service system includes: a plurality of access points installed in an indoor environment and configured to send Wi-Fi signals including access point identification information; a mobile terminal configured to receive a Wi-Fi signal from at least one of the access points and form a first Wi-Fi fingerprint based on the received Wi-Fi signal; and a navigation service server in communication with the mobile terminal, the navigation service server being configured to construct a plurality of Wi-Fi radio maps based on a plurality of second Wi-Fi fingerprints acquired at locations of the indoor environment, select a Wi-Fi radio map for estimating a location of the mobile terminal among the plurality of Wi-Fi radio maps, estimate the location of the mobile terminal by using a second Wi-Fi fingerprint corresponding to the first Wi-Fi fingerprint based on the selected Wi-Fi radio map, and form location information including the estimated location, wherein the first and second Wi-Fi fingerprints include received signal strength of the Wi-Fi signal and the access point identification information of the access point that sends the Wi-Fi signal.",
  "title": "SYSTEM AND METHOD FOR LOCATION-BASED SERVICE FOR NAVIGATING INDOORS"
}