摘要:
[Object] To implement wireless communication also with a communicating apparatus that is a limited band terminal capable of receiving only part of frequencies. [Overcoming Means] 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.
摘要:
According to the present invention, transmission is efficiently and repeatedly performed within a slot. The number of repetitions in the slot is calculated using OFDM symbol allocation in a slot notified using a predetermined field during RRC signaling or DCI formatting and the number of divisions in the slot notified by the RRC signaling (or the number of OFDM symbols serving as repetition unit). When the calculated number of repetitions does not satisfy a predetermined condition, repeated transmission is not performed.
摘要:
The present invention provides a terminal apparatus for communicating with a base station apparatus, the terminal apparatus including: a controller configured to use an MCS table among a first MCS table, a second MCS table, and a third MCS table, and an MCS index, to determine a modulation order and a target coding rate to be used in a PDSCH, wherein the third MCS table is used in a case that at least a higher parameter for an MCS table is configured to a prescribed value, and a PDSCH is scheduled by a PDCCH with a CRC scrambled by a first RNTI, or a PDSCH is scheduled by a PDCCH with a CRC scrambled by a second RNTI is added.
摘要:
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.
摘要:
To provide a base station apparatus, a terminal apparatus, a location server, and a communication apparatus that are capable of improving position estimation accuracy. A physical signal generating unit configured to generate first positioning reference signal and second positioning reference signal, and a transmitter configured to transmit the first positioning reference signal and the second positioning reference signal to a terminal apparatus are provided. The first positioning reference signal is mapped on one resource block and the second positioning reference signal is mapped on at least six resource blocks. The resource block is constituted of prescribed subcarriers in a frequency domain. A maximum v number of consecutive subframes on which the first positioning reference signal is transmitted is larger than a maximum number of consecutive subframes on which the second positioning reference signal is transmitted.
摘要:
Radio transmission is performed even to a communication party whose bandwidth that can be used for transmission and reception is limited without having an influence of an offset of a DC component. A radio transmitter applied to an OFDMA communication system in which a plurality of different terminals performs communication using OFDM signals at the same time that includes a mapping part that allocates transmission power to each"subcarrier, and also selects a subcarrier to which minimum power of the transmission power to be allocated is allocated and modulates transmission data in units of communication slots to output the modulated data; and a transmission part for transmitting radio signals including the modulated data using each of the subcarriers.
摘要:
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 signal detection unit that demodulates a signal that is transmitted to the terminal apparatus itself, based on first modulation mapping in a case where a predetermined transmission mode is configured, and that demodulates a signal based on second modulation mapping in a case where a transmission mode other than the predetermined transmission mode is configured. A base station apparatus that communicates with a terminal apparatus includes a modulation unit that performs modulation using first modulation mapping from bits addressed to a plurality of terminal apparatuses, in a case where a predetermined transmission mode is configured, and that performs modulation using second modulation mapping from bits that are addressed to one terminal apparatus, in a case where a transmission mode other than the predetermined transmission mode is configured.
摘要:
A terminal apparatus, which performs communication with a first base station apparatus and a second base station apparatus which has a smaller maximum transmit power than that of the first base station apparatus, includes a control unit that extracts control information from signals received from the first base station apparatus and the second base station apparatus and sets communication parameters of an uplink data signal, in which a bit number of information which is extracted by the control unit as the control information from the signal from the second base station apparatus is smaller than a bit number of information which is extracted as the control information from the signal from the first base station apparatus.
摘要:
To perform control so as to achieve a transmission power that satisfies a desired communication quality by an access method which a mobile station apparatus uses, in consideration of the frequency-selective diversity effect, when switching an access method to the one having a different frequency-selective diversity effect. In a wireless communication system in which a communication control apparatus and a communication terminal apparatus that are able to use a plurality of types of access methods perform wireless communication using any of the access methods, the communication control apparatus, when the necessity of changing the access method arises, determines the access method after change and notifies the communication terminal apparatus of switching the access method before change to the determined access method, and performs the transmission power control in accordance with communication characteristics of the determined access method.