Apparatus and process for transmitting a deceitful signal to a mobile phone
US6765884B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 27, 2000 |
| Grant date | Jul 20, 2004 |
| Priority date | — |
| Expiry date | Jul 13, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W4/00
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
To eliminate the acoustic nuisance caused by a ringing of a mobile telephone (1) in a limited geographical zone (7), a device (8) for the transmission of a signal (9) is placed in this zone (7). The decoy signal (9) is obtained by identifying the radioelectric synchronization signal (10), received by a receiver (11), that is the most powerful signal transmitted in this zone (7) and by producing a replica of this synchronization signal (10). This replica is amplified and desynchronized with respect to the received signal (10). Thus a mobile telephone (1) present in this zone (7) considers this decoy signal (9) to be the most powerful one and will therefore get connected with the dummy transmitter (12) that transmits this dummy signal (9). Thus, the production of acoustic nuisance in this zone (7) is avoided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.