Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive broadcast information from a base station indicating a numerology or a reference signal (RS) pattern to be used in broadcast or multicast transmissions (e.g., a physical multicast channel (PMCH)). The UE may identify a modulation and coding scheme (MCS) associated with the broadcast or multicast transmission and may determine a transport block size (TBS) based on the MCS and at least one of the numerology or the RS pattern. For instance, a UE may determine TBS for numerologies associated with a single symbol that spans multiple subframes differently from that of other numerologies. Additionally or alternatively, a UE may determine TBS for sparse RS patterns differently from that of other RS patterns. The UE may then perform communication with the base station via the broadcast or multicast transmissions in accordance with the TBS.

A wireless device receives a downlink control information (DCI) indicating uplink resources in m subframes of a licensed assisted access (LAA) cell. The DCI comprises: a resource blocks (RBs) field; a modulation and coding scheme (MCS) field; and a redundancy versions (RV) field and a new data indicators (NDI) field for each of the m subframes. The wireless device transmits, in each of the m subframes, one or more transport blocks employing the RBs field and the MCS field across the m subframes and employing each RV field and each NDI field corresponding to each subframe.

A method of operating a time division duplex (TDD) wireless communication system is disclosed. The method includes establishing communications with a remote transceiver. A subframe configuration including static and flexible subframes is determined and transmitted to the remote transceiver. A channel state information (CSI) report is received from the remote transceiver in response to the subframe configuration.

A method for performing link adaptation includes in a first network node of a wireless network: initializing data transmission with a second network node of the wireless network by transmitting a request-to-send message to the second network node and by receiving a clear-to-send message from the second network node, wherein the request-to-send message and the clear-to-send message are transmitted on one or more channels of the wireless network; after said initializing, generating a first data packet of the data transmission, wherein said generating comprises processing the first data packet with link adaptation parameters fixedly associated for use in connection with first data packets of data transmissions, wherein said link adaptation parameters are included in a subset of most robust link adaptation parameters supported by the first network node; receiving, from the second network node, a message indicating new link adaptation parameters for use in a subsequent data transmission; and generating a second data packet of the data transmission, wherein said generating the second data packet comprises processing the second data packet with the new link adaptation parameters indicated in the message.

This application provides a method and apparatus for feeding back channel information for an unlicensed band and a communication system, wherein, a method includes: UE determines a subframe for feeding back channel information by UE according to configuration of an eNB; the UE detects whether there exists a predefined reference signal in the subframe for measuring channel quality; and when there exists the predefined reference signal in the subframe for measuring channel quality, the UE reports a channel quality measurement result of the subframe for measuring channel quality at the subframe for feeding back channel information. With the embodiments of this disclosure, errors of CQI measurement and report in using the LTE technology at an unlicensed band may be avoided.

Disclosed are a parameter transmission method and apparatus, and a non-transitory computer-readable storage medium. The transmission parameter method includes: sending, by a sending end, control information carrying a value of at least one transmission parameter in at least one transmission parameter set; wherein the control information adopts a value of a transmission parameter for a slot or a link on which the control information acts.

A method is described for generating and transmitting a frame by a station. The method includes determining a bandwidth of a frame to be transmitted by the station; generating a long training field for the frame, wherein the long training field includes a set of pilot tones located at a set of subcarrier positions, wherein when the bandwidth of the frame is 10 MHz, the set of subcarrier positions include four subcarrier positions and the four subcarrier positions are set as {−21-α1,−7-α2,7+α3,21+α4} where α1, α2, α3, and α4 are odd values, and wherein when the bandwidth of the frame is 20 MHz, the set of subcarrier positions include six sub carrier positions, including {−53-β1,−25-β2,−11-β3, 11+β4,25+β5,53+β6} where β1, β2, β3, β4, β5, and β6 are odd values.

A signaling transmission method and device, a signaling reception method and device, a storage medium and a terminal are provided. The signaling transmission method includes: if an advanced setting for transmitting Real Time Application (RTA) packets is supported, configuring an indication signaling, wherein the indication signaling is used to instruct a Wireless Local Area Network (WLAN) station to transmit a packet based on packet duration limitation and/or transmission opportunity duration limitation; and transmitting the indication signaling. Embodiments of the present disclosure may shorten latency to meet communication requirements of RTA.

A link adaptation method is disclosed for a transmitter node configured for spatial multiplexing of signals into streams and for transmission of spatially multiplexed streams over a forward channel, wherein each stream is intended for a receiver node. The method comprises selecting a transmission pre-coding setting for at least one of the spatially multiplexed streams based on an acquired channel estimate of the forward channel, estimating a forward channel disturbance component, wherein the forward channel disturbance component includes signal distortion for the forward channel caused by at least one hardware component of the transmitter node and/or the receiver node, and performing link adaptation for at least one of the spatially multiplexed streams based on the selected transmission pre-coding setting and the estimated forward channel disturbance component. Corresponding apparatus, transmitter node and computer program product are also disclosed.

An electronic device may receive a frame associated with a second electronic device. This frame may include a MAC header with information specifying a request for a trigger or a trigger frame, and the information may include a suggested time interval during which the trigger or the trigger frame is to be provided and a requested resource allocation. For example, the MAC header may include an A-control field, and the A-control field may include the information or may include multiple A-MPDUs and one or more of the A-MPDUs (such as a last A-MPDU or all of the A-MPDUs) may include the information. Moreover, the time interval may begin at a previous transmission associated with the second electronic device, and the requested resource allocation may include a capacity. In response to the request, the electronic device may provide the trigger or the trigger frame addressed to the second electronic device.