Pozitionarea terminalului mobil in retele de acces UTRAN

Autor/autori: Ing. Vasile PETRICA, Ing. Gabriela BURLACU

Rezumat: Serviciul de localizare (LCS) a terminalului mobil poate fi furnizat de retelele de acces de tip UTRAN ca serviciu platit de abonati, pentru serviciile de urgenta (112), pentru serviciile speciale sau pentru managementul resurselor radio. Pozitionarea este posibila prin instalarea unor unitati de masurare a pozitiei (LMU) in Nodurile B si a unui centru de localizare (MLC) in controlorul retelei radio. Daca LMU si MLC sunt pozitionate independent acestea comunica cu Nodurile B si controlorul retelei radio prin interfetele Uu si respectiv Iupc. Metodele de pozitionare standardizate utilizate in UTRAN sunt: Cell coverage, OTDOA (Observed Time Difference Of Arrival), U-TDOA (Uplink-Time Difference Of Arrival) si A-GPS (Assisted Global Positioning Systems). Acuratetea de estimare a pozitiei terminalului mobil este, in functie de metoda, intre 5 si 1000 m.

Cuvinte cheie: serviciul de localizare, pozitionare, terminale mobile, retele UTRAN

Abstract: Location Services (LCS) of mobile terminal may be provided by UTRAN access networks as subscribers paid service or for emergency services (112), special services or radio resource management. The positioning is possible by installing location measurement units (LMU) in Node B and a mobile location centre (MLC) in radio network controller. If LMU and MLC are positioned independently they communicate with Node B and radio network controller by Uu interface and Iupc respectively. The standardized positioning methods used in UTRAN are: Cell coverage, OTDOA (Observed Time Difference Of Arrival), U-TDOA (Uplink Time Difference Of Arrival) and A-GPS (Assisted Global Positioning Systems). The accuracy of estimate mobile terminal position is based on method, between 5 and 1000 m.

Keywords: location service, positioning, mobile terminals, UTRAN networks

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