Patent ID: 10819388

Abstract:
In a case that a large number of terminal apparatuses accommodated in a contention based radio communication technology share a frequency resource, the number of data signals of the terminal apparatuses which are non-orthogonally multiplexed in the spatial domain increases. Therefore, in a case that the number of non-orthogonally multiplexed data signals of the terminals is considerably large, residual interference after removing interference in the reception processing degrades transmission performance. A transmission device for transmitting a data signal to a reception device includes a transmission processing unit configured to transmit the data signal without receiving SR transmission and control information for transmission authorization transmitted by the reception device, an identification signal multiplexing unit configured to multiplex an identification signal on an orthogonal resource, and a control information receiving unit configured to receive in advance a transmission parameter associated with the data signal transmission. The transmission parameter includes any of a first data transmission to transmit the data signal by using a continuous frequency resource and a second data transmission to transmit the data by using a discontinuous and equal interval frequency resource.