| 摘要 |
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. |
| 主权项 |
1. A method of providing communications to and from devices being transported by vehicles, comprising:
obtaining, at a hybrid communications distributor disposed in a terrestrial location, first content that is to be delivered to a device, the device being a mobile computing device that is temporarily being transported by a vehicle; selecting, by a processor of the hybrid communications distributor, a first modulation scheme from a set of pre-defined modulation schemes; causing, by the hybrid communications distributor, a forward transmission to be sent via a forward link to the vehicle, the forward link included in a first communication link supported by a first frequency band, the forward transmission configured using the first modulation scheme, and the forward transmission including (i) the first content, and (ii) an indication of the device; receiving, at the hybrid communications distributor from the vehicle, via a reverse link included in a second communication link supported by a second frequency band, feedback information; selecting, by the processor of the hybrid communications distributor and based on the feedback information, a second modulation scheme from the set of pre-defined modulation schemes for delivery of a subsequent forward transmission to the vehicle, the subsequent forward transmission including second content to be delivered to the device or to another device being transported by the vehicle; and causing, by the hybrid communications distributor, the subsequent forward transmission to be sent via the forward link to the vehicle, the subsequent forward transmission configured using the second modulation scheme. |
