| 摘要 |
The invention relates to a mobile communication system comprising: mobile stations (MS, MS'), a mobile switching center (MSC1), and a subscriber register (VLR1) containing subscriber data, which includes location information indicating the location of mobile stations. In order to detect the presence of a fraudulent mobile station the system comprises: monitoring means (1) for monitoring the processes which trigger location information changes in said subscriber register (VLR1), and detecting means (2) for detecting and indicating the presence of a fraudulent mobile station (MS') if a location information change has been triggered by a process which should not trigger a change of location information in said subscriber register (VLR1).
|
