An electronic device on a user equipment side in a wireless communication system wherein the user equipment is a cluster head of a D2D cluster, the electronic device comprising: a communication unit and a configuration unit, wherein the communication unit is configured to perform device-to-device D2D communication under a cellular communication protocol with a plurality of user equipments, to transmit data information and/or control information to the plurality of user equipments directly, wherein the plurality of user equipments are constructed into the D2D cluster; and wherein the configuration unit is configured to configure, for a first user equipment and a second user equipment of the plurality of user equipments, resources and a modulation and coding scheme MCS for performing the D2D communication between the first user equipment and the second user equipment, the second user equipment being a candidate object with which the first user equipment performs the D2D communication, wherein the communication unit is further configured to: transmit information indicating the resources and the MCS to the first user equipment and the second user equipment; wherein the communication unit is further configured to receive indication information indicating quality of a link between the first user equipment and the second user equipment from the first user equipment, and the configuration unit is configured to configure the resources and the MCS for performing the D2D communication between the first user equipment and the second user equipment in a case that the quality of the link indicated by the indication information meets a predetermined condition, wherein the communication unit is further configured to receive indication information indicating quality of a link between the first user equipment and a third user equipment from the first user equipment, and the predetermined condition at least comprises that the quality of the link between the first user equipment and the second user equipment is better than the quality of the link between the first user equipment and the third user equipment; wherein the communication unit is further configured to receive information indicating that the third user equipment is a broadcasting information source for the first user equipment and the second user equipment from the first user equipment and/or the second user equipment, and in a case that the predetermined condition is met, the configuration unit is configured to determine that the first user equipment performs unicasting D2D communication with the second user equipment, and the communication unit is configured to receive a transmission frame number status for the first user equipment and the third user equipment from the first user equipment, and transmit the transmission frame number status to the second user equipment. a communication unit and a configuration unit, wherein the communication unit is configured to perform device-to-device D2D communication under a cellular communication protocol with a plurality of user equipments, to transmit data information and/or control information to the plurality of user equipments directly, wherein the plurality of user equipments are constructed into the D2D cluster; and wherein the configuration unit is configured to configure, for a first user equipment and a second user equipment of the plurality of user equipments, resources and a modulation and coding scheme MCS for performing the D2D communication between the first user equipment and the second user equipment, the second user equipment being a candidate object with which the first user equipment performs the D2D communication, wherein the communication unit is further configured to: transmit information indicating the resources and the MCS to the first user equipment and the second user equipment; wherein the communication unit is further configured to receive indication information indicating quality of a link between the first user equipment and the second user equipment from the first user equipment, and the configuration unit is configured to configure the resources and the MCS for performing the D2D communication between the first user equipment and the second user equipment in a case that the quality of the link indicated by the indication information meets a predetermined condition, wherein the communication unit is further configured to receive indication information indicating quality of a link between the first user equipment and a third user equipment from the first user equipment, and the predetermined condition at least comprises that the quality of the link between the first user equipment and the second user equipment is better than the quality of the link between the first user equipment and the third user equipment; wherein the communication unit is further configured to receive information indicating that the third user equipment is a broadcasting information source for the first user equipment and the second user equipment from the first user equipment and/or the second user equipment, and in a case that the predetermined condition is met, the configuration unit is configured to determine that the first user equipment performs unicasting D2D communication with the second user equipment, and the communication unit is configured to receive a transmission frame number status for the first user equipment and the third user equipment from the first user equipment, and transmit the transmission frame number status to the second user equipment.