| 摘要 |
A monitoring computer (115) monitors the communications occurring within at least one communication system for a unique communication unit identification (ID) code associated with a communication unit (105, 110). In a first embodiment, for each occurrence of the unit ID code, the monitoring computer determines a location of the communication unit affiliated with that unit ID code. When two or more instances of the unit ID code occur within a predetermined period of time at locations separated by more than a predetermined distance, the unit ID code is identified as a potentially duplicated unit ID code. In a second embodiment, a counter is incremented for each occurence of the unit ID code. If the counter exceeds a predetermined number within a predetermined period of time, the unit ID code is identified as a potentially duplicated unit ID code.
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