Method and apparatus for locating a subscriber unit in a communication system
US6141558A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 7, 1998 |
| Grant date | Oct 31, 2000 |
| Priority date | — |
| Expiry date | May 7, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W76/50
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
After determining a distressed mobile subscriber communication unit 100 is within a communication coverage area (60) of a base transceiver station (BTS) (22), a mobile BTS (55) positioned at a first location (201) uses a rotating directional antenna (46) to force mobile subscriber communication units including the mobile subscriber communication unit (100) to hand off communication. When the mobile BTS (55) detects the subscriber ID associated with the mobile subscriber communication unit (100) during handoff, a first direction of the directional antenna (46) is noted. The same procedure is repeated at another location (202) and a second direction of the directional antenna (46) is noted. A triangulation process using the first and second direction of the directional antenna and the first and second locations (201) and (202), reveal the location (203) of the mobile subscriber communication unit (100).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.