WIRELESS COMMUNICATION DEVICE, WIRELESS COMMUNICATION SYSTEM AND WIRELESS COMMUNICATION METHOD

摘要

Efficiency in data transmission performed in the case of a contention based radio resource being set is improved. A radio communication apparatus (2) selectively performs one of a first transmission method using for data transmission a radio resource which is assigned by a radio communication apparatus (1) and which can be used on a contention basis by a plurality of radio communication apparatus (2 and 3) and a second transmission method involving random access. Alternatively, the radio communication apparatus (2) selectively performs one of the first transmission method and a third transmission method involving a request made to the radio communication apparatus (1) to assign a radio resource for data transmission.