Transmission device, reception device, and communication method

A reception device for receiving a data signal from each of multiple transmission de vices, the reception device comprising:

• a reception processing unit configured to receive the data signal transmitted without transmitting control information for transmission authorization;
• an identification signal demultiplexing unit configured to demultiplex an identification signal received together with the data from an orthogonal resource;
• a transmission terminal identification unit configured to identify, based on the identification signal, the transmission device having performed data transmission;
• and
• a control information transmission unit configured to transmit in advance a transmission parameter to be used for the data transmission, wherein
• the transmission parameter transmitted by the control information transmission unit includes information of a frequency resource used for the data transmission for each of the multiple transmission devices, and the information of the frequency resource is capable of indicating a use of a continuous frequency resource and a use of a discontinuous and equal interval frequency resource.

A communication method of a transmission device for transmitting a data signal to a reception device, the communication method comprising the steps of:

• transmitting the data signal without receiving control information for transmission authorization transmitted by the reception device;
• multiplexing an identification signal on an orthogonal resource;
• and
• receiving a transmission parameter in advance, the transmission parameter being capable of indicating, for transmitting the data signal, a use of a continuous frequency resource and a use of a discontinuous and equal interval frequency resource, wherein
• in the transmitting step, the data signal is transmitted, based on the transmission parameter by any of a first data transmission to transmit the data signal by using the continuous frequency resource, and a second data transmission to transmit the data by using the discontinuous and equal interval frequency resource.

A communication method of a reception device for receiving a data signal from each of multiple transmission devices, the communication method comprising the steps of:

• receiving the data signal transmitted without transmitting control information for transmission authorization;
• demultiplexing an identification signal received together with the data from an orthogonal resource;
• identifying, based on the identification signal, the transmission device having performed data transmission;
• and
• transmitting in advance a transmission parameter to be used for the data transmission, wherein
• the transmission parameter includes information of a frequency resource used for the data transmission for each of the multiple transmission devices, and the information of the frequency resource is capable of indicating a use of a continuous frequency resource and a use of a discontinuous and equal interval frequency resource.