The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 12, 2002
Filed:
Jun. 08, 1999
Brendan Patrick Ludden, Swindon, GB;
Luis Lopes, Swindon, GB;
Motorola, Inc., Schaumburg, IL (US);
Abstract
Apparatus for determining the location of a subscriber unit ( ) in a mobile telecommunications network, and particularly in a GSM cellular network, includes the provision of several receiver stations ( ) positioned at separate known locations within each cell. Each of the receiver stations ( ), which are synchronised by means of an on-board GPS receiver ( ), measures the time of arrival of a message transmitted from the subscriber unit ( ). The time of arrival measurements recorded by each receiver station ( ) are then transmitted to a base transceiver station ( ) for computation of the subscriber unit's location relative to the receiver stations. The apparatus can provide a reasonably accurate means for location with a low susceptibility to interference.