Επεκτείνοντας το CLS: Ένα πολύ-σχηματικό συνεργατικό σύστημα εύρεσης θέσης βασισμένο στο Bluetooth και στο IEEE802.11
Building on CLS: A multi-modal cooperative location-sensing system using Bluetooth and IEEE802.11
Μαστοράκης, Κωνσταντίνος Ν
Mastorakis, Konstantinos
Παπαδοπούλη, Μαρία
During the last years we witnessed an increasing interest in pervasive computing systems and applications. Thereis agrowing needfor systems that will enhance the information access without any distractions to the user. These pervasive systems are embedded to the environment and can offer context-orlocation-aware services. For the support of these services, location-sensing systems are critical.
One such system is Cooperative Location Sensing (CLS) system. It allows de¬vices to estimate their location in a self-organizing matter without the need for extensive infrastructure, or specialized hardware. The initial CLS version runs on IEEE802.11-enabled devices. We have extended CLS to take advantage of the Bluetoothwireless communication technology. TheCLS-bluetoothclient uses signal strength information to produce a position estimation. In addition, this extended CLS allows the synergistic use of the two wireless technologies, namely IEEE802.11 and bluetooth.
InthisM.Sc. thesis, we analyzetheseCLS extensions andpresenttheperformance evaluation experiments for both Bluetooth-only and joint Bluetooth-IEEE802.11 positioning estimations. Furthermore, we investigated the impact of physical ob¬stacles(mobile or stationery) on signal strengthinformation and ontheperformance of the system. We found a median location estimation error of 1.7 meters using Bluetooth-only estimationand amedianlocationerrorof1.6 meters using thejoint IEEE802.11-Bluetooth estimation, under normal conditions.
(EN)
