A system and method for proximity control of a barrier comprise a stationary wireless signal receiving device and a mobile transmitting device. The wireless signal receiving device may monitor at least one transmitting device within a predetermined coverage area and may be a radio frequency receiver or a spread spectrum receiver located near the barrier. In one embodiment, the transmitter device emits a control signal that is received by the receiving device when the transmitter is within a reception range. In one embodiment, the control signal includes transmitter identification information, directional information and position information.

 
Web www.patentalert.com

< Methods and apparatus for transmitting data in a radio communication system including signaling allocation of a common channel

< Method of transmitting audio and video signals over radio and television channels

> Public wireless/cordless internet gateway

> Method for setting a R-P link in mobile communication system

~ 00281