Road vehicle communication method using light and radio
US6766172B1 · kind B1 · utility
Assignees
Inventors
Key dates
| Filing date | Sep 19, 2000 |
| Grant date | Jul 20, 2004 |
| Priority date | — |
| Expiry date | Oct 24, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W88/085
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A road vehicle communication method allows bothway communication to be held between a mobile station, which sends a request for an information service and receives it, and a central base station and local base stations located at a roadside for sending the information service to the mobile station. The central base station and the local base stations use optical fibers in part of the transmission path thereof for the bothway communication and perform at least one of electric-to-optical conversion and optical-to-electric conversion. The mobile station is caused to send the request for an information service beforehand. In response to the request, the local base station covering the mobile station expected to receive the information service is estimated. When the mobile station lies in a service area to which the local base station estimated is assigned, a control station is caused to provide the mobile station with information corresponding to the information service requested.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.