FIELD: radio engineering, communication.
SUBSTANCE: invention relates to wireless communication. The method of selecting a radio communication resource according to the present invention is intended for selection of a radio communication resource to be allocated to an uplink acknowledgement signal which indicates the reception state of a downlink signal from a plurality of radio communication resources defined by frequency and code. The method includes a step of designating a plurality of radio communication resources by first information on an uplink radio communication resource; a step of designating one radio communication resource by second information on an uplink radio communication resource; and a step of selecting one allocated radio communication resource designated by the second information among a plurality of radio communication resources designated by the first information as a radio communication resource for allocation to the uplink acknowledgement signal.
EFFECT: flexibly setting the time of allocating a downlink radio communication resource.
14 cl, 9 dwg
