Wireless communication system between a vehicle and a portable device
US9292984B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Dec 13, 2012 |
| Grant date | Mar 22, 2016 |
| Priority date | — |
| Expiry date | Jan 12, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07C2009/00769
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
In a wireless communication system, an approach determination section determines whether a portable device is inside of a nearby area of one of a plurality of transmitting antennas transmitting a primary signal. When the approach determination section determines that the portable device is inside of the nearby area, a transmission control section changes a driving voltage of another one of the transmitting antennas disposed outside of the nearby area, such that a communication area of the another one of the transmitting antennas is increased to encompass the nearby area of the one of the transmitting antennas, and the primary signal is retransmitted from the another one of the transmitting antennas.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.