Abstract: Techniques for providing hybrid communications to devices on vehicles include using 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. A subsequent forward link is selected, based on the reverse data, from a plurality of forward links, each of which is supported by a different frequency band. Forward data may be multiplexed and/or multicast, and in some cases, multiple forward links may be used for distributed forward data delivery. These techniques allow for efficient data delivery to the vehicle, and in particular while the vehicle is in transit and link conditions are dynamic.

Abstract: Techniques for optimizing modem use for data delivery to vehicles that are near to or parked at ports include using a high-capacity forward communications link, in a first frequency band, to support a logical forward link of a data tunnel via which data is delivered between a data provider and the vehicle. Instead of using the reverse communications link of the first frequency band, though, a reverse communications link in a different frequency band is used to support the reverse logical link of the data tunnel, as reverse data typically requires less bandwidth. Thus, the forward communications link is used in a high-throughput, unidirectional manner. Forward data may be multiplexed and/or multicast, and in some cases, multiple forward communications links may be used in parallel to support the logical forward link of the data tunnel.