Method for managing message transmissions between vehicle and off-board system

A method performed by an off-board system for managing message transmissions between a vehicle and the off-board system, the method comprising:

• transmitting by the off-board system, a first fragment of a message to the vehicle via a first communication channel;
• receiving a notification from the vehicle indicating that a second communication channel is available to use;
• managing message queues by moving a second fragment of the message from the queue of messages for transmission via the first communication channel to the queue of messages for transmission via the second communication channel;
• and
• transmitting the second fragment of a message to the vehicle via the second communication channel.

An onboard electronic control unit comprised in a vehicle for managing message transmissions between the vehicle and an off-board system, the onboard electronic control unit is configured to:

• communicate a first fragment of a message between the vehicle and the off-board system via a first communication channel, the first communicating channel having a first throughput, a first transfer rate, a first latency, a first path loss ratio, and a first inter-packet delay variation;
• detect by the vehicle, availability of a second communication channel, the second communication channel having at least one of a second throughput higher than the first throughput, a second transfer rate greater than the first transfer rate, a second latency less than the first latency, a second path loss ratio less than the first path loss ratio, or a second inter-packet delay variation less than the first inter-packet delay variation;
• and
• communicate a second fragment of the message between the vehicle and the off-board system via the second communication channel.

An off-board system for managing message transmissions between a vehicle and the off-board system, the off-board system is configured to:

• transmit a first fragment of a message to the vehicle via a first communication channel;
• receive a notification from the vehicle indicating that a second communication channel is available to use;
• manage message queues by moving a second fragment of the message from the queue of messages for transmission via the first communication channel to the queue of messages for transmission via the second communication channel;
• and
• transmit the second fragment of a message to the vehicle via the second communication channel.