A wireless device receives, from a base station, a first system information block. The first system information block comprises a broadcast status parameter indicating that a second system information block for a sidelink communication is provided on-demand. A radio resource control (RRC) request to establish an RRC connection for the sidelink communication is transmitted based on the broadcast status parameter. Based on the RRC connection, a sidelink request for a sidelink resource for the sidelink communication is transmitted. An RRC message indicating the sidelink resource is received.