FIELD: wireless communication.
SUBSTANCE: communication terminal apparatus comprises a transmission unit, configured and/or programmed to transmit a random access preamble in a physical random access channel (PRACH) to a communication device of a base station, and a receiving unit configured and/or programmed to receive downlink control information from the communication device of the base station with parity cyclic parity check (CRC) parity bits, scrambled by random access radio network (RA-RNTI) temporary identifier, wherein RA-RNTI is determined at least based on index of orthogonal frequency division multiplexing (OFDM) symbol, from which PRACH starts, wherein the random access preamble in the PRACH is transmitted based on the PRACH mask index included in the physical downlink control channel (PDCCH) order.
EFFECT: high efficiency of transmitting data over an uplink through use of the entire frequency band.
8 cl, 21 dwg
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