Electronic device in wireless communication system, and wireless communication method

A communication method on a base station side in a wireless communication system, comprising:

• determining, irrespectively of a path loss between a first user equipment and a second user equipment and based on an in-band emission, for the first user equipment, D2D transmission power parameters for performing Device-to-Device D2D communication with the second user equipment,
• wherein the D2D transmission power parameters comprise a first power parameter that indicates a D2D nominal power for the first user equipment to perform D2D communication, and the D2D nominal power is different from a cellular nominal power for the first user equipment to perform a cellular communication with the base station device.

A method of performing, with a user equipment of a wireless communication system, Device-to-Device (D2D) communication with a target user equipment, the method comprising:

• acquiring D2D transmission power parameters from a base station, the D2D transmission power parameters comprising a first power parameter that indicates a D2D nominal power for the user equipment to perform D2D communication, the D2D nominal power being different from a cellular nominal power for the user equipment to perform cellular communication with the base station;
• transmit D2D signals to the target user equipment with a D2D transmission power determined based on the received D2D transmission power parameters, wherein
• the D2D transmission power parameters are determined by the base station irrespectively of a path loss between the user equipment and the target user equipment and based on an in-band emission for the user equipment performing D2D communication with the target user equipment.