| 摘要 |
<p>A process for detecting the presence of active cell phones in an area protected from their use, comprising the following steps: acquiring the identification signals and codes of the cell base stations or BTS active in the protected area; transmitting radio interference into the protected area in the bands and on the frequencies used internationally for cellular telephony; stopping the emission of the aforesaid radio interference; creating a signal of a virtual BTS, or a local mobile telephone station not connected to the network, having an idenfication code different from those of the real BTS active in the protected area; receiving radio frequency registration signals from cell phones; determining the presence of these cell phones; and signalling their presence to responsible personnel.</p> |
