System and method for preventing unauthorized use of a micro cellular system
US5943396A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 21, 1995 |
| Grant date | Aug 24, 1999 |
| Priority date | — |
| Expiry date | Dec 21, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W84/045
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
In a micro cellular system (MCS) which co-exists with a cellular system (CMTS) in a frequency band, fraudulent use of the MCS when it is moved from the CMTS to the location of another CMTS is prevented by providing a control unit 2 in the MCS which controls the overall operation of the MCS and a system ID receiving and judging unit which is capable of receiving all the downward control channels used in the CMTS. When the system ID receiving and judging unit receives a system ID transmitted from the CMTS which matches a system ID stored in the MTS, the control unit is allowed to start the operations of the MCS. Otherwise, the MCS is disabled. Therefore, if the MCS moves to another CMTS zone where the system ID is different, it is impossible to operate the MCS.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.