Location systems and cellular communication networks
US7089019B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 26, 2003 |
| Grant date | Aug 8, 2006 |
| Priority date | — |
| Expiry date | Nov 2, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S5/14
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A location system for use in a mobile communication network includes base stations which transmit known signals at predetermined times for use in deriving location data; a first transmitting and receiving units; a unit for determining times of arrival of the known signals from each base station at each of the first transmitting and receiving units; a unit for determining times of arrival of the known signals from each base station at a second transmitting and receiving unit at an unknown location; a comparing unit for comparing timing differences between the known signals received at the first transmitting and receiving units and the second transmitting and receiving unit; and location determining unit for determining the location of the second unit. Each of the first transmitting and receiving units includes a unit for deriving its location from a further set of received signals such as GPS signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.