Patent ID: 8111639

Claim:
A radio transmitting apparatus, comprising: a propagation distance estimating section that estimates a propagation distance from a communicating party station based on a signal transmitted from the communicating party station; a selecting section that selects a random access channel format of a frame length supporting the estimated propagation distance, from a plurality of random access channel formats of frame lengths supporting propagation distances; a transmitting section that transmits a random access channel frame using the selected random access channel format; and an arrangement section that arranges a plurality of items of information in the selected random access channel format, according to the frame length of the selected random access channel format, in descending order of levels of priority assigned respectively to the plurality of items of information, wherein: the arrangement section arranges only an item of information of a highest level of priority in a random access channel format of a shortest frame length from among the plurality of random access channel formats.