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:
Jul. 24, 2001
Filed:
Dec. 11, 1998
Bagher R. Zadeh, Dallas, TX (US);
Shahrokh Amirijoo, Richardson, TX (US);
Ericsson Inc., Richardson, TX (US);
Abstract
A wireless communication network and methodology providing GPS assistance data for positioning of mobiles with built-in GPS receivers (GPS-MS). The system and methodology includes obtaining a site location of the BTS currently serving a GPS-MS to be located, as well as obtaining the air interface time in relation to the absolute GPS time at the BTS currently serving the GPS-MS. Knowing the geographical location of the BTS currently serving the GPS-MS, range measurement assistance data is provided with a time of calculation to the GPS-MS. This information is used by the GPS-MS to obtain GPS measurement data at the indicated time of calculation using this a priori information. The GPS-MS obtains GPS measurement data based on the a priori information quickly, and returns the GPS assistance data to a mobile location center (MLC) which ultimately determines the position of the GPS-MS. The MLC has ephermis data, and converts the air interface time to the absolute GPS time for calculation of the GPS-MS position. Minimal traffic across the wireless network is required, and the position of the GPS-MS can be quickly obtained.