Signal time of arrival position determining method for calculati

Telecommunications – Radiotelephone system – Zoned or cellular telephone system

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

455406, 342463, H04M 1100, G01S 302

Patent

active

057582882

ABSTRACT:
A cellular telephone mobile unit position determining method which utilizes a plurality of range transceivers located at known fixed locations adapted to transmit approximately synchronized digital range signals. The method is especially adapted to determine the position of a cellular mobile unit within cellular service areas for determining billing charges and/or access restrictions. According to the invention, the fixed position range transceivers transmit range signals which are received by a mobile unit. The mobile unit determines either the time difference of arrival or absolute time of arrival of the range signals, which in turn is used to determine the mobile unit's position for cellular billing and/or access restriction purposes. The range transceivers are operable to receive an error signal and correspondingly adjust the output of the next transmitted range signal so as to drive the detected synchronization error to approximately zero.

REFERENCES:
patent: 5155490 (1992-10-01), Spradley, Jr. et al.
patent: 5225842 (1993-07-01), Brown et al.
patent: 5235633 (1993-08-01), Dennison et al.
patent: 5365516 (1994-11-01), Jandrell
patent: 5408683 (1995-04-01), Ablay et al.
patent: 5542100 (1996-07-01), Hatakeyama
patent: 5581261 (1996-12-01), Hickman et al.
patent: 5600706 (1997-02-01), Dunn et al.
patent: 5612703 (1997-03-01), Mallinckrodt
patent: 5717406 (1998-02-01), Sanderford et al.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Signal time of arrival position determining method for calculati does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Signal time of arrival position determining method for calculati, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Signal time of arrival position determining method for calculati will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1978304

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.