Mobile radio telephone system having an identity which can be dynamically changed
US6978156B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 6, 1999 |
| Grant date | Dec 20, 2005 |
| Priority date | — |
| Expiry date | Mar 6, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W8/183
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
The invention relates to a mobile radio system having a plurality of mobile terminals (ME) connected with a mobile switching center (MZ) via an air interface for communication control and optionally for billing. The mobile terminals (ME) are controlled by a subscriber identity module (SIM) in which data for associating at least one user are stored, the subscriber identity module (SIM) having an identity (IMSI) associated therewith. For utilizing a mobile radio device for different purposes, such as private and business, a subscriber identity module is known which contains at least two permanently stored identities and thus has the disadvantage of being inflexible. The invention therefore proposes a subscriber identity module (SIM) containing a calculation rule for calculating from the stored identity (IMSI) at least one further identity (IMSIw), the identities generated by the calculation rule being associated accordingly in the mobile switching center (MZ).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.