Title :
Automatic location identification using a hybrid technique
Author :
Yost, George P. ; Panchapakesan, Shankari
Author_Institution :
Wireless Eng. Technol., Ericsson Inc., Richardson, TX, USA
Abstract :
Automatic location indication (ALI) has been mandated by the US Federal Communications Commission (FCC) for the use of Public Safety Answering Points (PSAPs) and other users, by late 2001. We analyze a hybrid approach which uses combination of time difference of arrival (TDOA) and independent time of arrival (TOA) information to supplement each other. Both pieces of information are available with no hardware modifications to currently-available handsets and relatively inexpensive alterations to the base station system. We obtain significantly reduced statistical errors compared with either technique separately. This reduction may be necessary for compliance with the FCC requirement. In addition, there is expected to be a reduction in the measurement bias. The technique has particular advantages in the large areas on the periphery of the central coverage regions
Keywords :
cellular radio; land mobile radio; radionavigation; safety; ALI; FCC; Federal Communications Commission; PSAP; Public Safety Answering Points; TDOA; TOA; USA; automatic location identification; cellular phone service providers; central coverage regions; handsets; hybrid technique; independent time of arrival; measurement bias reduction; statistical errors; time difference of arrival; Antenna measurements; Base stations; Cellular phones; FCC; Global Positioning System; Information analysis; Safety; Telephone sets; Time difference of arrival; Time measurement;
Conference_Titel :
Vehicular Technology Conference, 1998. VTC 98. 48th IEEE
Conference_Location :
Ottawa, Ont.
Print_ISBN :
0-7803-4320-4
DOI :
10.1109/VETEC.1998.686576