TRANSMISSION POWER CONTROL MECHANISM FOR DISCOVERY SIGNAL TRANSMISSION

摘要

There is provided a mechanism usable for conducting a power control for a transmission of a discovery signal in a communication network, in particular for a D2D discovery signal. A network control element such as an eNB configures transmission power parameters usable for determining a transmission power to be set by a communication device such as a UE for transmitting a discovery signal for a specific communication mode such as a D2D communication mode. The configured transmission power parameters are sent by means of an information element such as a dedicated system information block. In the UE, the transmission power parameters are used to set the transmission power for transmitting the discovery signal in the specific communication mode. The discovery signal comprises a power information element indicating whether or not and possibly how the transmission power used for transmitting the discovery signal differs to a common transmission power reference value. A UE receiving the discovery signal for e.g. D2D communication mode comprising the power information element calculates a link quality and path loss on the basis of the actual transmission power of the received discovery signal and the information derived from the power information element.