| CPC H04W 28/10 (2013.01) [H04W 24/10 (2013.01); H04W 28/0278 (2013.01); H04W 4/40 (2018.02)] | 14 Claims |

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1. A server comprising:
at least one transceiver;
at least one processor; and
at least one memory connected to the at least one processor and storing instruction that, based on being executed, cause the server to perform operations comprising:
receiving first channel state information between a Telematics Communication Unit (TCU) and a base station and second channel state information between the TCU and an electronic device in a vehicle;
receiving information on an available buffer size from the TCU;
generating a first table based on a data rate in a downlink period between the base station, the TCU, and the electronic device in the vehicle, based on the first channel state information and the second channel state information;
identifying a bottleneck period in the downlink period based on the information on the available buffer size; and
transmitting downlink data to the TCU through the base station based on the first table.
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