D2d data packet transmission method, and transmission resource allocation method and apparatus

Provided are a D2D data packet transmission method, and a transmission resource allocation method and apparatus. The method comprises: setting a plurality of data packet copies of a D2D data packet; determining the transmission frequencies of all the data packet copies, wherein the transmission frequencies of all the data packet copies are different; and transmitting the data packet copies at corresponding transmission frequencies. The D2D data packet transmission method provided in the embodiments of the present invention can realise a small data transmission time delay, thereby achieving the purpose of better controlling time delays.