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:
Oct. 05, 1999
Filed:
Jan. 15, 1997
Maria E Palamara, Denville, NJ (US);
Robert Ellis Richton, Madison, NJ (US);
Lucent Technologies Inc., Murray Hill, NJ (US);
Abstract
The present invention is a wireless location messaging system and method for determining the location of a mobile-telephone in a home or roaming wireless communication system, and in a multitude of call states using an audit signal and a confirmation signal that provides enhanced location accuracy. In one embodiment, the present invention wireless location messaging system is implemented in a wireless communication system comprising a base station for transmitting an audit signal, receiving a confirmation signal transmitted by a mobile-telephone in response to the audit signal and time stamping when the confirmation signal was received, and a location system for determining a location of the mobile-telephone using the receive times of the confirmation signal. The audit signal and the confirmation signal are transmitted using a communication channel that depends on the current call state of the mobile-telephone. Another embodiment of the present invention includes a location register that indicates the wireless communication system last known to serve the particular mobile-telephone. If a second wireless communication system was last known to the serve the particular mobile-telephone, the second wireless communication system is cause to transmit the audit signal, receive the confirmation signal, and time stamp the confirmation signal using its base stations. Subsequently, these receive times are used to determine the location of the particular mobile-telephone.