Method and device for data transmission in V2I network

1. A data transmission method of a reference base station, comprising:

setting an entire time interval for transmitting encoded data to a vehicle passing a coverage range of the reference base station disposed around a road;

extracting a plurality of data time intervals corresponding to the encoded data to be transmitted from the reference base station to the vehicle;

determining encoded data to be transmitted to the vehicle in each of the data time intervals, wherein the encoded data includes an original packet and a coding packet obtained by performing systematic network coding (SNC) on original data;

transmitting the encoded data generated by the reference base station in each of the data time intervals; and transmitting a portion of an original packet included in encoded data generated by a nearby base station that is handed over from the reference base station, in a remaining time interval of the entire time interval from which the data time intervals are excluded,

wherein, in a data time interval starting from a handover point among a plurality of data time intervals of the nearby base station that is handed over from the reference base station, a remaining portion of the original packet included in the encoded data generated by the nearby base station and a coding packet for the original packet are transmitted, and

wherein the determining of the encoded data comprises:

determining a maximum amount of data to be transmitted from the reference base station disposed around the road to the vehicle traveling on the road;

determining an encoding number for the SNC based on the determined maximum amount of data;

performing the SNC on the original data using the encoding number and the maximum amount of data; and

transmitting, to the vehicle, the encoded data obtained by performing the SNC.

2. The data transmission method of claim 1 , wherein the setting of the entire time interval comprises:

setting the entire time interval based on at least one parameter of information associated with the vehicle, information associated with the road on which the vehicle travels, information associated with the reference base station, or information associated with a channel formed between the vehicle and the reference base station.

3. The data transmission method of claim 1 , further comprising:

additionally generating a coding packet corresponding to the remaining time interval using the original packet included in the encoded data generated by the nearby base station.

4. The data transmission method of claim 1 , wherein the determining of the maximum amount of data comprises:

determining the maximum amount of data based on at least one parameter of information associated with the vehicle, information associated with the road on which the vehicle travels, information associated with the base station, or information associated with a channel formed between the vehicle and the reference base station.

5. The data transmission method of claim 1 , wherein the determining of the encoding number comprises:

determining the encoding number based on the maximum amount of data and a loss of the data to be transmitted from the reference base station to the vehicle.

6. The data transmission method of claim 1 , wherein the performing of the SNC comprises:

obtaining the encoded data including the original packet and the coding packet by applying, to the original data of the encoding number, an identity matrix determined based on the encoding number and a coding coefficient matrix determined based on the maximum amount of data and a loss of the data to be transmitted to the vehicle.