| 摘要 |
<p>A system and method for communicating between a signal generator and a signal receiver, for providing controlled access to information and/or communication channels, whereby the signal generator and the signal receiver are set to wirelessly transmit and receive a plurality of simultaneously transmitted signals, respectively, and the signal receiver is set to selectively provide access to information and/or communication channels on receiving the plurality of simultaneously transmitted signals from the signal generator, the signal generator comprising means for limiting a transmission of a predetermined signal to at least one of a prescribed duration and a prescribed number of activations for access to the information and/or communication channels.</p> |
