A wireless network is provided that includes a base station and subscriber stations that communicate with the base station using radio frequency (RF) time division duplex (TDD) signaling. The base station may establish medium access control (MAC) connections with each station. The base station monitors communications with the stations and, in accordance, assigns stations or MAC connections to modulation groups. The base station transmits signals on MAC connections or to stations in a modulation group in adjacent TDD slots within a TDD frame. The base station may receive access requests from the stations, evaluate traffic requirements for the stations, and determine a longest downlink portion for the stations. The base station then allocates downlink and uplink portions of a TDD frame according to the length of the longest downlink portion.

The present invention includes: a receiver configured to receive a DCI format used for scheduling a PDSCH, and a higher layer parameter including a parameter subframeAssignment-r15; and a transmitter configured to transmit a HARQ-ACK corresponding to the PDSCH, wherein in a case that a duplex mode of a primary cell is an FDD, whether the number of bits in a HARQ process number field in the DCI format is three bits or four bits is determined, based on whether or not an EN-DC is configured, whether or not the higher layer parameter including the parameter subframeAssignment-r15 is configured, and whether or not the DCI format is mapped to a USS given by a C-RNTI.

There is a large chunk of unlicensed/shared high-frequency spectrum above the 5G radio frequency that begin to be utilized for 5G applications. 5G currently supports a limited number of waveforms. The other waveforms may be beneficial to the shared high-frequency bands, such as SC-QAM/SC-FDM for downlink transmission and SC-QAM for uplink transmission to improve link budget and to reduce complexity. A method, apparatus, and computer-readable medium at a user equipment (UE) are disclosed to determine a first waveform for a broadcast channel, based in part on a received synchronization block signal from a base station. Then the UE further determines a second waveform for at least one signaling channel, based in part on the received broadcast channel.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive an indication of one or more waveforms supported by a base station, wherein the one or more waveforms include at least one of an orthogonal frequency division multiplexing (OFDM) waveform, a single carrier frequency domain (SC-FD) waveform, or a single carrier time domain (SC-TD) waveform. The UE may determine whether the UE is capable of communicating with the base station based at least in part on the indication. The UE may selectively communicate with the base station using at least one waveform of the one or more waveforms based at least in part on the determination. Numerous other aspects are provided.

The present disclosure relates to an adaptive mode switching method for simultaneous wireless power/information transmission operating in a dual mode and an apparatus for performing the same. The adaptive mode switching apparatus for simultaneous wireless power/information transmission operating in a dual mode includes: an energy harvesting unit; a single tone information receiving unit; a multi-tone information receiving unit; a time-division switch; and an adaptive mode switching control unit which determines a communication mode and a modulation index based on a battery status, the magnitude of the received signal, and a data transmission rate and controls the time-division switch in accordance with the selected communication mode and modulation index. It is possible to overcome a limited energy transmission area of simultaneous wireless power/information transmission (SWIPT) using a single tone in a low power IoT environment and a low transmission rate of a peak-to-average power ratio (PAPR)-based SWIPT using a multi-tone.

Embodiments of the present disclosure disclose an uplink data transmission method and apparatus. The method may include: generating uplink scheduling information according to an obtained scheduling information generation rule, where the uplink scheduling information includes at least a modulation and coding scheme; and when uplink data needs to be sent, modulating and encoding the uplink data by using the modulation and coding scheme, and sending the modulated and encoded uplink data to an access device. According to the embodiments of the present disclosure, uplink data sending efficiency of user equipment can be improved.

An access point (AP) having full duplex (FD) capabilities transmits a trigger frame to cause at least a first station (STA) to initiate an uplink (UL) reference frame to the AP, the trigger frame further causing at least one second STA to obtain a signal strength measurement during transmission of the UL reference frame, and the AP receives from the at least one second STA, a reporting frame containing information about the signal strength measurement.

A user apparatus includes a transmission/reception circuit that transmits an uplink signal and receives a downlink signal; and a control circuit that switches to transmitting, as the uplink signal, an uplink control signal or a random access channel signal within a time interval configured of a plurality of symbols, after a given interval that is provided to prevent transmission of the uplink signal and reception of the downlink signal from overlapping each other within the time interval, by using a format in which first several symbols are blanked in the time interval.

The present disclosure relates to an adaptive mode switching method for simultaneous wireless power/information transmission operating in a dual mode and an apparatus for performing the same. The adaptive mode switching apparatus for simultaneous wireless power/information transmission operating in a dual mode includes: an energy harvesting unit; a single tone information receiving unit; a multi-tone information receiving unit; a time-division switch; and an adaptive mode switching control unit which determines a communication mode and a modulation index based on a battery status, the magnitude of the received signal, and a data transmission rate and controls the time-division switch in accordance with the selected communication mode and modulation index. It is possible to overcome a limited energy transmission area of simultaneous wireless power/information transmission(SWIPT) using a single tone in a low power IoT environment and a low transmission rate of a peak-to-average power ratio (PAPR)-based SWIPT using a multi-tone.

It must be understood that such structure comprising CP1 and CS1 is implicitly there, even if the transmitter only explicitly prepends a CP1. Indeed, and explained by example of a full duplex multicarrier system, the receiver will still be required to discard a number of samples equivalent to a cyclic suffix from the received time samples of each symbol to obtain orthogonality with the echo received from the transmit symbols.