Adaptive modulation in a hybrid vehicle communication system
US9577857B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 25, 2014 |
| Grant date | Feb 21, 2017 |
| Priority date | — |
| Expiry date | Jan 30, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W72/30
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Techniques for providing hybrid communications to devices on vehicles include using a selected modulation scheme on a forward link to deliver data (that is intended to be received by an on-board device) onto a vehicle, and using a reverse link in a different frequency band to send reverse data from the vehicle. Based on the reverse data, a subsequent pre-defined modulation scheme for a subsequent forward transmission is selected from a plurality of modulation schemes corresponding to a plurality of performance levels of data delivery. The selections may be based on a current geo-spatial location of the vehicle, a type of data, and/or on one or more other dynamic conditions. The forward data may be multiplexed and/or multicast. Thus, adaptive modulation is achieved in a hybrid communications system in which the forward link and the reverse link to the vehicle are supported by different wireless communication bands.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.