A first base station receives, from a wireless device, at least one first message comprising a parameter indicating whether the wireless device supports multiple uplink semi persistent scheduling (SPS) configurations for V2X communications. At least one second message is selectively transmitted when the parameter indicates support of the multiple SPS configurations. The at least one second message comprises: an uplink SPS radio network temporary identifier (RNTI), at least one uplink SPS configuration parameter, and an SPS configuration index for the at least one uplink SPS configuration parameter. A downlink control information (DCI) corresponding to the uplink SPS RNTI is transmitted. The DCI comprises the SPS configuration index. At least one transport block is received employing the at least one uplink SPS configuration parameter.