US4907290A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mobile transmitter/receiver
Assignee: Datatrak Ltd
•
Filing: 1988-05-13
•
Granted: 1990-03-06
•
Expires: 2008-05-13
Abstract
Abstract A mobile transmitter/receiver is for use in a communication system comprising a plurality of fixed transmitters/receivers located at spaced apart positions in a terrestial area, each fixed transmitter/receiver operating on one or more of a plurality of radio frequency channels. The mobile transmitter/receiver comprises: a transmitting/receiving section for transmitting information to and receiving information from the fixed transmitters/receivers; a location determining section for receiving signals from the fixed transmitters/receivers for determining the location of the mobile transmitter/receiver within the communication system; data storage for storing information relating to radio communication paths from all locations in the area to the fixed transmitters/receivers; a selecting section for determining from the location of the mobile transmitter/receiver determined by the location determining section and the information stored in the data storage a selected one of said communication paths; and a conditioning section for conditioning the transmitting/receiving section in accordance with information stored in the data storage relating to the selected communication path.
Inventors
- 👤 Edward W. Crompton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:42
CPC Classifications
H; H04; H04W; H04W64/00; H04W88/00; H04W88/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
157 words
A mobile transmitter/receiver for use in a communication system comprising a plurality of fixed transmitters/receivers located at spaced apart positions in a terrestial area, each fixed transmitter/receiver operating on one or more of a plurality of radio frequency channels, and locating means, the mobile transmitter/receiver comprising: transmitting/receiving means for transmitting information to and receiving information from the fixed transmitters/receivers; location determining means for receiving signals from the locating means for determining the location of the mobile transmitter/receiver within the communication system; data storage means for storing information relating to radio communication paths from all locations in the area to the fixed transmitters/receivers; selecting means for determining from the location of the mobile transmitter/receiver determined by the location determining means and the information stored in the data storage means, a selected one of said communication paths; and conditioning means for providing the transmitting/receiving means with information stored in the data storage means relating to the selected communication path.
Claim 2
Dependent Claim
157 words
A mobile transmitter/receiver for use in a communication system comprising a plurality of fixed transmitters/receivers located at spaced apart positions in a terrestial area, each fixed transmitter/receiver operating on one or more of a plurality of radio frequency channels, and locating means, the mobile transmitter/receiver comprising: transmitting/receiving means for transmitting information to and receiving information from the fixed transmitters/receivers; location determining means for receiving signals from the locating means for determining the location of the mobile transmitter/receiver within the communication system; data storage means for storing information relating to radio communication paths from all locations in the area to the fixed transmitters/receivers; selecting means for determining from the location of the mobile transmitter/receiver determined by the location determining means and the information stored in the data storage means, a selected one of said communication paths; and conditioning means for providing the transmitting/receiving means with information stored in the data storage means relating to the selected communication path.
Claim 3
Dependent Claim
36 words
A mobile transmitter/receiver as claimed in claim 1 wherein said conditioning means further comprises means for providing the transmitting/receiving means with power and/or sensitivity information from the data storage means relating to the selected communication path.
Claim 4
Dependent Claim
39 words
A mobile transmitter/receiver as claimed in claim 1 or 2 including means for directing a radio beam from the transmitting/receiving means in accordance with information from the data storage means relating to the direction of the selected communication path.
Claim 5
Dependent Claim
20 words
A mobile transmitter/receiver as claimed in claim 1 or 2 in which the data storage means includes a lookup table.
Claim 6
Dependent Claim
154 words
A communication system comprising: a plurality of fixed transmitters/receivers located at spaced apart positions in a terrestial area, each fixed transmitter/ receiver operating one or more of a plurality of radio frequency channels; locating means; and a plurality of mobile transmitters/receivers each comprising transmitting/receiving means for transmitting information to and receiving information from the fixed transmitters/receivers, location determining means for receiving signals from the locating means for determining the location of the mobile transmitter/receiver within the communication system, data storage means for storing information relating to radio communication paths from all locations in the area to the fixed transmitters/receivers, selecting means for determining from the location of the mobile transmitter/receiver determined by the location determining means and the information stored in the data storage means, a selected one or said communication paths, and conditioning means for providing the transmitting/receiving means with information stored in the data storage means relating to the selected communication path.
Claim 7
Dependent Claim
154 words
A communication system comprising: a plurality of fixed transmitters/receivers located at spaced apart positions in a terrestial area, each fixed transmitter/ receiver operating one or more of a plurality of radio frequency channels; locating means; and a plurality of mobile transmitters/receivers each comprising transmitting/receiving means for transmitting information to and receiving information from the fixed transmitters/receivers, location determining means for receiving signals from the locating means for determining the location of the mobile transmitter/receiver within the communication system, data storage means for storing information relating to radio communication paths from all locations in the area to the fixed transmitters/receivers, selecting means for determining from the location of the mobile transmitter/receiver determined by the location determining means and the information stored in the data storage means, a selected one or said communication paths, and conditioning means for providing the transmitting/receiving means with information stored in the data storage means relating to the selected communication path.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-03-05 | 1993-09-04 | 1994-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-03-05 | 1997-09-04 | 1998-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-03-05 | 2001-09-04 | 2002-03-06 | $7700.00 | Window Closed / Lapsed |