Research of TSBToA Based Positioning Algorithms and Technology in Wi-Fi Environment
Jun-Seong Kim, Jong-In Jung, Sangsun Lee · 17th ITS World CongressITS JapanITS AmericaERTICO · 2010
Tracking technologies which provide real-time and customized information through various information collecting and processing for pedestrians who use traffic connections and transferring centers have been examined. However some problems are caused due to the wide-range positioning error for some services such as device installation and service place. It is also difficult to be applied to traffic linkage and transfer services because many situations can happen. So the authors used 'TOA (time of arrival) location surveying mode' based on Time Stamp, which is less affected in wireless environment interference than 'RSSI mode'. Then the authors researched the more accurate Time Stamping mode to improve surveying accuracy. Though the existing Time Stamping was only executed at the WLAN (wireless local area network) MAC (medium access control) layer, this paper researched improved data transmit time accuracy to minimize transmit delay messages for location surveying between MAC and PHY (physical layer).