Device-to-device (D2D) communication method and apparatus

The invention discloses a device-to-device (D2D) communication method and apparatus. The D2D communication method comprises the following steps: first user equipment (UE) obtaining a first power value, wherein the first power value comprises a maximum standard power value of the first UE for sending data; the first UE obtaining a second power value, wherein the second power value comprises a power value for D2D communication between the first UE and the second UE; and the first UE comparing the first power value and the second power value with a third power value, determining that minimum power is output power used for sending the data to the second UE by the first UE, and the third power value comprises a maximum emission power value of the first UE. According to the invention, the output power used for sending the data to the second UE by the first UE is determined, and under the condition that D2D communication performance is not affected, it is ensured that interference power of the first UE for a base station does not go beyond a first target power value configured for an RRC signaling of the base station.