METHOD FOR INITIAL ACCESS PROCEDURE

A method comprising: receiving, in an apparatus comprising a wirelessly chargeable power source or a power source with energy harvesting capability, a configuration message from a network node, said message comprising a first and a second random access (RA) resources, and a threshold value for selecting the first or the second RA resource based on an energy level of said power source; obtaining data to be transmitted to the network node; initiating an initial access procedure by sending the first RA resource and/or the data to the network node in response to the energy level being at least at the threshold value; or initiating the initial access procedure by sending the second RA resource to the network node in response to the energy level being below the threshold value; and entering, in response to sending the second RA resource, into an energy harvesting mode for charging said power source.