1. A method, comprising:determining an initial configuration mode of a network element for setting up a self-controlled radio access network, wherein determining the initial configuration mode comprises a precondition that the network element relies on mobile battery power, and a loss or limited backhaul connection;
determining an initial downlink transmission power of the network element coupled with the determined initial configuration mode;
detecting a need of changing downlink transmission power of the network element based on at least one of traffic demands and conditions of the self-controlled radio access network;
determining a new downlink transmission power; and
indicating at least one of the change of downlink transmission power and the initial configuration mode to at least one user equipment.