Tracking of mobile terminal equipment in a mobile communications system
US6636742B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 22, 2000 |
| Grant date | Oct 21, 2003 |
| Priority date | — |
| Expiry date | Jan 31, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W8/12
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Drawbacks of known methods of location determination are that the location can be determined only when the mobile station is setting up a call and during the call. The invention utilises that characteristic feature of mobile telephone systems that the location of the terminal is always known to the system with location area precision and that the geographical network topology is known to the network planning system. The tracing system includes three functional parts: a first part provides the mobile telephone system with the connection number of the traced terminal as an enquiry input, and in response to the input it receives information on where the subscriber's location area should be enquired for. The second functional part asks for the subscriber's location area and receives in response a location area code, which identifies the location area unambiguously. The third functional part searches the location area table for information corresponding with the subscriber's location area and attends to reporting on the results. The location area table is formed on a basis of cell topology information which is available in advance from the network planning system, which converts the loc…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.