Abstract: A method that carries out uplink multiple access while reducing complexity in processing accompanying exchange of control information. A terminal device that performs uplink multiple access communication includes a reception unit that receives a frame including uplink multiple access connection information, a first autonomous decentralized control unit that instructs securing time of a wireless resource, and a second autonomous decentralized control unit that instructs securing time of a wireless resource after reception of a frame including the uplink multiple access connection information. The terminal device is instructed securing time of the wireless resource by the first autonomous decentralized control unit in a case that a frame including the uplink multiple access connection information is not received. Securing time of the wireless resource is instructed by the second autonomous decentralized control unit in a case that a frame including the uplink multiple access connection information is received.

Abstract: A terminal apparatus (20) includes: a first direction configuring unit configured to receive transmission beam information that is information of a transmission beam used by a transmission device (10-m) and configure a first direction (102-m) that is a direction vector of the transmission beam in a first coordinate system based on the transmission beam information; a radio receiving unit configured to configure a reception beam used for reception of a signal from the transmission device; a second direction configuring unit configured to configure a second direction (202-m) that is a direction vector of the reception beam in a second coordinate system; and an orientation measuring unit configured to perform measurement of an orientation of the terminal apparatus itself based on the first direction (102-m) and the second direction (202-m).

Abstract: A signal that is transmitted to a terminal apparatus itself is demodulated with high precision, and throughput is improved. A terminal apparatus that communicates with a base station apparatus includes: a reception unit that receives downlink control information from the base station apparatus; and a signal detection unit that demodulates a signal that is transmitted to the terminal apparatus itself, based on first modulation mapping, and demodulates an interference signal based on second modulation mapping, in a case where information relating to a transmit power of the interference signal is included in the downlink control information.

Abstract: In an LTE-A system, there is a problem that it is difficult to perform stable communication in a case where there is a time when another system occupies an unlicensed band being used. There is provided a base station apparatus that communicates with a terminal device in a second frequency band different from a first frequency band capable of being used as a dedicated frequency band. The base station apparatus includes: a wireless transmission unit that transmits data or control information to the terminal device; and a wireless reception unit that receives data or control information transmitted from the terminal device.

Abstract: Provided are a frequency channel allocating section (10) that allocates frequency channels, a terminal reception quality information processing section (6) that calculates an optimal modulation rate and required transmit power for each subcarrier, a subcarrier power control section (12) that controls a level of transmit power for each subcarrier, and a determining section (10) that checks a reception bandwidth of a communicating apparatus, while determining whether the communicating apparatus is a full band terminal capable of receiving all the frequency channels in the system band or is a limited band terminal capable of receiving only part of frequencies, and when the communicating apparatus is the limited band terminal, the transmit power of all or part of subcarriers is decreased in a frequency channel that is adjacent to a reception band allocated to the communicating apparatus and that is allocated to another communicating apparatus.

Abstract: A terminal apparatus for communicating with a base station apparatus includes a transmission unit configured to transmit Phase-tracking reference signals (PTRS), and an higher layer processing unit configured to configure information for indicating a time density and/or a frequency density of the PTRS. A PTRS pattern is configured such that the time density of the PTRS is higher for a larger Modulation and Coding Scheme (MCS) scheduled for the terminal apparatus, and the frequency density of the PTRS is based on the number of resource blocks scheduled for the terminal apparatus.

Abstract: Included are a receiver configured to receive first downlink data mapped to the first component carrier and second downlink data mapped to the second component carrier; and a transmitter configured to transmit a signal for indicating delivery confirmation of the first downlink data and the second downlink data. A timing to transmit the signal for indicating the delivery confirmation is defined by a prescribed number of time slots, and a length of each of the time slots is configured based on a subcarrier spacing of the first component carrier and a subcarrier spacing of the second component carrier.

Abstract: In a base station device for transmitting data signals to a plurality of terminal devices, the base station device includes a signal multiplexing unit that multiplexes data signals for at least a first terminal device and a second terminal device, a control information generation unit that generates, for the first terminal device, control information containing information related to the data signal destined for the second terminal device, and a radio receiving unit that receives information of a reception processing capability of each terminal device.

Abstract: A method that carries out uplink multiple access while reducing complexity in processing accompanying exchange of control information. A terminal device that performs uplink multiple access communication includes a reception unit that receives a frame including uplink multiple access connection information, a first autonomous decentralized control unit that instructs securing time of a wireless resource, and a second autonomous decentralized control unit that instructs securing time of a wireless resource after reception of a frame including the uplink multiple access connection information. The terminal device is instructed securing time of the wireless resource by the first autonomous decentralized control unit in a case that a frame including the uplink multiple access connection information is not received. Securing time of the wireless resource is instructed by the second autonomous decentralized control unit in a case that a frame including the uplink multiple access connection information is received.

Abstract: In the present invention, in a case that an AE requests to change a registrar CSE from a first CSE to a second CSE, an AE-ID, a resource ID of an AE management resource, and a CSE-ID of the registrar CSE, or one of these, is included in a re-registration request. This enables reuse of the AE management resource, thus allowing the amount of communication between the AE and the registrar CSE to be reduced.

Abstract: A communication device comprising at least a receiver and a demodulator. The receiver receives first receiving signals and second receiving signals, wherein the first receiving signals are allocated to a first set of subcarriers composed of two or more continuous subcarriers, the second receiving signals are allocated to a second set of subcarriers composed of two or more continuous subcarriers, and at least a portion of the second set of subcarriers overlaps a portion of the first set of subcarriers in a time frame. The demodulator configured to detect the second receiving signals transmitted using one or more subcarriers from receiving signals including the first receiving signals and the second receiving signals, wherein the one or more subcarriers are subcarriers such that the first set of subcarriers overlap the second set of subcarriers, and the demodulator being demodulates the first receiving signals.

Abstract: A bi-directional communication method needs to be switched on the basis of cost of bi-directional communication. Provided is a communication system including a first terminal apparatus and a second terminal apparatus, in which the first terminal apparatus includes a radio unit that transmits a first signal by using a first communication path that is a direct communication path to the second terminal apparatus, the second terminal apparatus includes a radio unit that transmits a second signal by using a second communication path that is a communication path different from the first communication path, and the first terminal apparatus transmits the first signal on the basis of a feature amount of the second signal transmitted by the second terminal apparatus.

Abstract: A terminal apparatus for communicating with a base station apparatus, the terminal apparatus including: a receiver configured to receive information related to subcarrier spacing for an OFDM signal from the base station apparatus; and a transmitter configured to transmit an uplink data channel to the base station apparatus by using the OFDM signal, based on the information related to the subcarrier spacing. The transmitter generates the OFDM signal by using a plurality of the subcarrier spacings, and the transmitter configures a transmit power of the uplink data channel, based on the subcarrier spacing of subcarriers to which the uplink data channel has been mapped.

Abstract: To provide a base station apparatus, a terminal apparatus, and a communication method capable of efficiently performing retransmission control for small size data in grant-free multiple access where the base station apparatus accommodates a large number of terminal apparatuses.

Abstract: A terminal apparatus using large FFT points transmits a reference signal such that short OFDM symbols are repeated.

Abstract: A method that carries out uplink multiple access while reducing complexity in processing accompanying exchange of control information. A terminal device that performs uplink multiple access communication includes a reception unit that receives a frame including first uplink multiple access information, and a transmission unit that transmits a frame including second uplink multiple access information based on the frame including the first uplink multiple access information, and further, after standby of a predetermined period, initiates the uplink multiple access communication.

Abstract: The objective of the invention is to achieve efficient downlink non-orthogonal multiple access using a limited amount of control information. A base station device that adds and transmits symbols addressed to a first terminal device and one or more second terminal devices, using portion of available subcarriers, includes: a power setting unit that sets the first terminal device to a lower energy than the one or more second terminal devices; a scheduling unit that, for signals addressed to the one or more second terminal devices, performs resource allocation that is different from resource allocation for a signal addressed to the first terminal device; and an MCS determining unit that controls modulation schemes such that, when allocating resources for the signal addressed to the first terminal device, the modulation schemes used by the one or more second terminal devices, to be added to the signal addressed to the first terminal device, are the same.

Abstract: A coding unit and a radio transmitting unit are included. The coding unit includes a first coding unit, a division unit, and a second coding unit. The first coding unit codes information bits by using first coding. The division unit divides an output from the first coding unit into blocks. The second coding unit performs error correction coding on each of the blocks output by the division unit to generate a coded block. The radio transmitting unit transmits a plurality of the coded blocks at a random transmission timing.

Abstract: A display unit is configured to display visual information that is visually recognized and superimposed on an external scene. A detection unit is configured to detect an event possibly causing danger by visually recognizing the visual information. A mounting unit is configured to be mountable on a head of a user and support the display unit and the detection unit. A controller is configured to suppress display of the visual information on the display unit in a case that the event is detected. Embodiments of the present invention can be applied to any of a terminal apparatus, a communication method, or a program.

Abstract: In some embodiments, a communication apparatus can transmit OFDM signals that include at least a first period and a second period. The communication apparatus can include a transmitting section and a signal processing section. The transmitting section can transmit the OFDM signals to an additional communication apparatus by using multiple subcarriers allocated a set of two or more contiguous frequency channels. The contiguous frequency channels can be used simultaneously by the additional communication apparatus. The signal processing section is configured to not use at least all subcarriers positioned in the respective centers of these frequency channels when allocating data to the subcarriers in the frequency channels used to transmit the OFDM signals for a first period.