A radio communication apparatus, including a communication control part
that controls direct communication or relay communication via a base
station with other radio communication apparatuses, a data generation
part that generates a mode transition notification to notify the other
radio communication apparatuses, which are targets of the direct
communication, of a transition to a power thrifty mode or a switching
request, notification to request switching from the direct communication
to the relay communication via the base station, and the mode transition
notification to the base station, and a mode control part that causes the
transition of an operation mode to the power thrifty mode after all
responses to the mode transition notification and the switching request
notification are received.