Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Patent
1997-01-15
1999-10-05
Chin, Wellington
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
342450, 342457, H04B 7005
Patent
active
059638664
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.
REFERENCES:
patent: 5625668 (1997-04-01), Loomis et al.
patent: 5627877 (1997-05-01), Penttonen
patent: 5736964 (1998-04-01), Ghosh et al.
patent: 5740538 (1998-04-01), Joice et al.
patent: 5758288 (1998-05-01), Dunn et al.
Palamara Maria E.
Richton Robert Ellis
Chin Wellington
Goo Jimmy
Lucent Technologies - Inc.
Tran Congvan
LandOfFree
Wireless location messaging does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Wireless location messaging, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Wireless location messaging will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1182916