Finding copied sim cards
US6341220B1 · kind B1 · utility
17Cited by
8References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 30, 1998 |
| Grant date | Jan 22, 2002 |
| Priority date | — |
| Expiry date | Oct 30, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W12/72
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method and apparatus implementing the method for detecting copying of an international mobile subscriber identity in a mobile communication network in which the location of mobile stations is updated in at least one register of the network. According to the method, the number of at least one type of location updatings (advantageously inter-MSC) is monitored within a predetermined monitoring period (e.g. 24 hours). This number is compared to a predetermined threshold value, and if the number of location updatings exceeds the predetermined threshold value, a signal indicative of the exceeding will be generated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.