Communications localization system
US5959580A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 3, 1994 |
| Grant date | Sep 28, 1999 |
| Priority date | — |
| Expiry date | Nov 3, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S2205/06
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and apparatus for locating a mobile radio communications transceiver in a cellular-telephone or cell-like communications system uses a simplified system for passive monitoring of the signals emitted by the transceiver. A single base station can determine a line of bearing to the remote transceiver. This line of bearing is then combined with collateral, position-sensitive information to determine the likely location of the transceiver. The present invention has particular applicability to roadway transportation in that it facilitates enhanced emergency (9-1-1) services and roadside assistance in response to calls for assistance, and it permits the passive monitoring of traffic flow.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.