System for detecting positional information
US6134448A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Dec 30, 1998 |
| Grant date | Oct 17, 2000 |
| Priority date | — |
| Expiry date | Dec 30, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W16/32
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A mobile terminal has a simple construction in a mobile communication system of a small-zone system. The mobile terminal 1 transmits base station identification information transmitted from base stations 2a through 2d and information of the intensity of electric field of received radio wave from the base station to a position managing station, while the position managing station specifies the current position of the mobile terminal, based on the above-mentioned information by means of a relational expression of the intensity of electric field and a distance between a point of transmission and reception and a database of the base station. With the simple construction of the mobile terminal 1, the current position of the mobile terminal 1 can be specified with higher accuracy. Further, the mobile terminal 1 transmits the base station identification information of the plurality of base stations and the intensity of electric field of the received radio wave from the base station to the position managing station, the current position of the mobile terminal 1 can be specified with higher accuracy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.