A radio communication device includes: a communication circuit configured to transmit and receive a signal to and from first radio communication device; and a control circuit configured to cause the communication circuit to receive a first signal in a first layer, the first signal being configured to include data in a second layer different from the first layer, and cause the communication circuit to transmit, through a first radio resource on a shared channel, acknowledgement information when the first signal from the first radio communication device is received, the first radio resource being selected from among the shared channel without scheduling information from the first communication device, the acknowledge information indicating whether the data in the second layer is normally received from the first radio communication device.