Patent ID: 10602505

Abstract:
In a case of a contention-based radio communication technique, it is necessary to identify a terminal apparatus that has performed data transmission among terminal apparatuses sharing a frequency resource. There is a problem that it is difficult to identify the terminal apparatus that has performed data transmission in a case with a large number of terminal apparatuses that are non-orthogonally spatial multiplexed. Included are: a reception processing unit possible to perform first data reception of receiving a data signal transmitted without SR reception and control information of transmission permission and second data reception of receiving a data signal transmitted after SR reception or transmission of control information of transmission permission; an identification signal separator configured to separate an identification signal; a transmission terminal identification unit configured to identify the transmission device, based on the identification signal; a control information transmitting unit configured to transmit in advance a transmission parameter; and a reference signal separator configured to separate a DMRS. The transmission terminal identification unit identifies the transmission device, based on the identification signal only in the first data reception, and the reference signal separator separates the DMRS only in the second data reception.