Short-distance radio communication system for vehicle
US9813846B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 18, 2016 |
| Grant date | Nov 7, 2017 |
| Priority date | — |
| Expiry date | Mar 18, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08C2201/91
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
This short-distance radio communication system for a vehicle includes an in-vehicle unit having more than one antenna and a portable unit performing radio communications with the in-vehicle unit. The in-vehicle unit transmits a first burst together with a call signal for calling the portable unit through a first antenna, and transmits a second burst subsequent to the first burst through a second antenna. The portable unit receives the signals transmitted from the in-vehicle unit, measures respective received signal strength indicators from the first burst and the second burst contained in the received signals, and responds to the in-vehicle unit according to results of comparing the respective indicators with given thresholds.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.