Enchanced time difference localization system
US6108555A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 26, 1996 |
| Grant date | Aug 22, 2000 |
| Priority date | — |
| Expiry date | Dec 26, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S2205/008
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and apparatus for locating a mobile radio communications transceiver in a cellular-telephone or cellular-like communications system use a simplified system for passive monitoring of the signals emitted by the transceiver. Two receiving base stations can determine the timing of signal arrivals from the remote transceiver. This timing information 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 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.