Method and apparatus in a wireless messaging system for dynamic

Details Method and apparatus in a wireless messaging system for dynamic Method and apparatus in a wireless messaging system for dynamic

1997-10-30

2000-04-18

Zimmerman, Brian

Communications: electrical

Continuously variable indicating

With meter reading

455 381, 455440, 455435, 455502, G08B 522

Patent

active

060520647

ABSTRACT:
Base transmitters (116) of a wireless messaging system are pre-programmed (802) with location identifiers (216) for identifying the positions at which the base transmitters are located. In response to an inbound message from a portable subscriber unit (122), a fixed portion (102) of the wireless messaging system makes an estimate (808) of a location at which the portable subscriber unit is positioned. A controller (112) sends (812) an outbound message (614) and the estimate to the base transmitters, and the base transmitters calculate (812) distances between themselves and the portable subscriber unit, based upon the location identifiers and the estimate. In addition, the base transmitters independently make a decision (818) whether to transmit the outbound message, based upon a comparison of a predetermined rule with the distance of the base transmitter from the portable subscriber unit.

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