Patent ID: 8681753

Claim:
A wireless device comprising: a mobile router configured to be located within a vehicle that has a predictable path of movement and configured to act as a hub of a wireless network on board the vehicle, wherein the mobile router is configured to communicate with a fixed transceiver in a cell of which the mobile router resides during a predictable path of movement of the vehicle, and wherein the mobile router is equipped with routing capability, wherein said mobile router is configured to implement routing of data packets between a packet-switched data network and at least one end user terminal operating in the wireless network on board the vehicle, and wherein said mobile router is configured to perform a corrective measure in a radio connection between a transceiver of said mobile router and said fixed transceiver using a magnitude of a doppler shift of the radio connection and a determined speed at which the mobile router on board the vehicle is moving received from a speed determination unit, which corrective measure comprises dynamically selecting packet size based at least in part on the magnitude of the doppler shift, wherein a smaller packet size is selected when the magnitude of the doppler shift becomes larger and a larger packet size is selected when the magnitude of the doppler shift becomes smaller.