On Potentials and Limitations of a Hybrid WLAN-RFID Indoor Positioning Technique

Algorithm 1

Maximum RSSI mode: pseudocode description.

//zone determination: get the zone with the strongest RSSI value

for each zone in numZone

   for each tag in numTag

  maxTagRSSI [zone] = ValueRSSI (tag, zone);

selectedZone = zone with highest maxTagRSSI;

//for each AP, the most frequent value of RSSI is selected among the

numObservations available

for each ap in numAP

   for each obs in numObservations

  vectorRSSI [ap] = mostFrequentRSSI (ap, obs);

//search the k nearest reference points to vectorRSSI in zone subset of

database

selectedReferencePoints = searchDB (selectedZone, vectorRSSI, k);

userPosition = weightedFunction (selectedReferencePoints)