A wireless communication device includes: a transmission unit that transmits a request frame indicating a request for traffic information; a receiving unit that receives a response frame in which the traffic information is stored; and a control unit that controls transmission of a frame related to permission of transmission directed to a first wireless communication device that is identified on the basis of the traffic information stored in the received response frame and that is permitted to perform multiple access. A wireless communication device includes: a receiving unit that receives a request frame indicating a request for traffic information; a transmission unit that transmits a response frame in which the traffic information is stored in response to the received request frame; and a control unit that controls transmission of a frame related to the traffic information on the basis of a communication parameter related to multiple access.

A wireless communication device includes: a transmission unit that transmits a request frame indicating a request for traffic information; a receiving unit that receives a response frame in which the traffic information is stored; and a control unit that controls transmission of a frame related to permission of transmission directed to a first wireless communication device that is identified on the basis of the traffic information stored in the received response frame and that is permitted to perform multiple access. A wireless communication device includes: a receiving unit that receives a request frame indicating a request for traffic information; a transmission unit that transmits a response frame in which the traffic information is stored in response to the received request frame; and a control unit that controls transmission of a frame related to the traffic information on the basis of a communication parameter related to multiple access.

In order to perform efficient communications. A terminal apparatus includes a higher layer processing unit configured to configure a subcarrier spacing of a physical channel, based on a first parameter, and a transmission unit configured to perform an uplink transmission by using the physical channel. In a case that transmissions on a first physical channel configured with a first subcarrier spacing and a second physical channel configured with a second subcarrier spacing occur in one serving cell, and that the second subcarrier spacing is wider than the first subcarrier spacing, the transmission unit allocates a transmit power on a priority basis to the second physical channel.

A wireless communication device includes: a transmission unit that transmits a request frame indicating a request for traffic information; a receiving unit that receives a response frame in which the traffic information is stored; and a control unit that controls transmission of a frame related to permission of transmission directed to a first wireless communication device that is identified on the basis of the traffic information stored in the received response frame and that is permitted to perform multiple access. A wireless communication device includes: a receiving unit that receives a request frame indicating a request for traffic information; a transmission unit that transmits a response frame in which the traffic information is stored in response to the received request frame; and a control unit that controls transmission of a frame related to the traffic information on the basis of a communication parameter related to multiple access.

A wireless communication device includes: a transmission unit that transmits a request frame indicating a request for traffic information; a receiving unit that receives a response frame in which the traffic information is stored; and a control unit that controls transmission of a frame related to permission of transmission directed to a first wireless communication device that is identified on the basis of the traffic information stored in the received response frame and that is permitted to perform multiple access. A wireless communication device includes: a receiving unit that receives a request frame indicating a request for traffic information; a transmission unit that transmits a response frame in which the traffic information is stored in response to the received request frame; and a control unit that controls transmission of a frame related to the traffic information on the basis of a communication parameter related to multiple access.

In a data transmission method, a terminal device obtains configuration information of a subframe n for transmitting at least one of a downlink data channel, an uplink data channel, a downlink control channel, an uplink control channel, a downlink reference signal, and an uplink reference signal. The terminal device performs data transmission between the terminal device and a network device on the subframe n according to the configuration information.

A communication system includes a communication apparatus and a base station. The communication apparatus includes a Discrete Fourier Transform (DFT) transformer which transforms a time-domain signal into a frequency-domain signal with a DFT size that is a product of powers of a plurality of values; a mapper which maps the frequency-domain signal on a plurality of frequency bands, each frequency band being located at a position separate from position(s) of other(s) of the plurality of frequency bands; and a signal generator which generates a single carrier-frequency division multiple access (SC-FDMA) time-domain signal from the mapped signal. The base station includes a receiver which receives the SC-FDMA time-domain signal; a combiner which generates the frequency-domain signal from the SC-FDMA time-domain signal; and a transformer which transforms the frequency-domain signal into the time-domain signal with an inverse Discrete Fourier Transform (IDFT) having the DFT size.

A communication system includes a communication apparatus and a base station. The communication apparatus includes a Discrete Fourier Transform (DFT) transformer which transforms a time-domain signal into a frequency-domain signal with a DFT size that is a product of powers of a plurality of values; a mapper which maps the frequency-domain signal on a plurality of frequency bands, each frequency band being located at a position separate from position(s) of other(s) of the plurality of frequency bands; and a signal generator which generates a single carrier-frequency division multiple access (SC-FDMA) time-domain signal from the mapped signal. The base station includes a receiver which receives the SC-FDMA time-domain signal; a combiner which generates the frequency-domain signal from the SC-FDMA time-domain signal; and a transformer which transforms the frequency-domain signal into the time-domain signal with an inverse Discrete Fourier Transform (IDFT) having the DFT size.

A method that incorporates aspects of the subject disclosure may include, for example, receiving digital data via a plurality of fiber optic cables, wherein the digital data represents a plurality of radio frequency signals received at a plurality of remote radio units via a plurality of uplink paths, wherein the first virtual processing system is configured to mitigate interference detected in one or more of the plurality of uplink paths, performing a plurality of measurements of the digital data to identify an interference condition associated with at least a portion of the plurality of uplink paths associated with the plurality of remote radio units; and providing updated digital data, according to the interference condition that is identified, to a second virtual processing system including at least one second virtual processor, wherein the second virtual processing system is configured to operate as one or more baseband units for providing cellular communication services. Other embodiments are disclosed.

A radio transmission apparatus selects any one group from a plurality of groups each indicating a combination of a plurality of radio reception apparatuses, notifies at least a plurality of radio reception apparatuses belonging to the selected group of an identification number assigned in advance to the selected group, and allocates transmission data addressed to the radio reception apparatuses belonging to the selected group to each of a plurality of frequency resources based on order of the radio reception apparatuses, which is determined in advance in the selected group.