1. A method for a device-to-device resource allocation, comprising:receiving, by a user equipment, information on allocated resources while the user equipment is connected to a mobile communication network,
continuing a usage of the allocated resources for a device-to-device discovery and/or a device-to-device communication by the user equipment when the user equipment is in an idle mode,
monitoring, by the user equipment, a report trigger event while the user equipment is in the idle mode, and
transmitting, by the user equipment, a status report to the mobile communication network in response to detecting the report trigger event, the status report indicating whether the user equipment still continues usage of the allocated resources for the device-to-device discovery and/or the device-to-device communication.