A first communications device obtains a first resource and a second resource; the first communications device sends first control information and first data to at least one communications device in a group on the first resource, where the first communications device and the at least one communications device in the group belong to a first communications device group, and the first communications device and the at least one communications device in the group each have a group identifier of the first communications device group; and the first communications device receives acknowledgement information from a second communications device on the second resource, where the second communications device is the at least one communications device in the group.

An indication can be received at a device from a network. The indication can request the device to feedback channel state information corresponding to a first transmit time interval length operation and/or a second transmit time interval length operation. When the indication requests channel state information feedback for the first transmit time interval length operation: a first reference transmit time interval of a first transmit time interval length can be determined based on the transmit time interval in which the indication is received. When the indication requests channel state information feedback for the second transmit time interval length operation: a second reference transmit time interval of a second transmit time interval length can be determined based on the transmit time interval in which the indication is received.

A scrambling sequence generation method is disclosed for reference signals, data, and downlink and uplink control channels. The scrambling sequence generation method determines an initial seed value used to calculate the scrambling sequence. The initial seed value is based on different parameters relating to the to be transmitted signals, and some of these parameters are explicitly defined for New Radio.

Methods, systems, and devices for wireless communications are described. In some systems (e.g., non-orthogonal multiple access (NOMA) systems), a base station may serve a large number of user equipments (UEs) on the uplink. To improve detectability for these uplink transmissions (e.g., if reference signals are not available for the transmissions), the UEs may implement parallel transmissions of preambles with uplink data. A UE may split the uplink data into one or more data layers, and may select one or more preamble layers to transmit superposed with the data layers. These preambles may be sequences known to both the UE and the base station to aid in detectability. The UE may assign different signature sequences to each of these layers based on cross-correlation values (e.g., assigning sequences with higher cross-correlation values to the data layers for improved detectability), and may scramble the layers into a single shared signal for transmission.

Disclosed are a method and device for transmitting a power saving signal, the method includes: sending, by a network device, a power saving signal to a terminal device, wherein the power saving signal comprises a first sequence, the first sequence is used to indicate at least part of identification information related to the terminal device, and/or the first sequence is used for the terminal device to perform time-frequency synchronization; wherein the identification information related to the terminal device comprises: an identity of a device group which the terminal device belongs to, a device identity of the terminal device, and Physical Cell Identification (PCI) information of a cell where the terminal device resides.

The present invention discloses a method for a terminal to receive a synchronization signal in a wireless communication system. Particularly, the method includes the steps of receiving a synchronization block including a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a physical broadcasting channel (PBCH) and receiving a DMRS (demodulation reference signal) via resource region in which the PBCH is received. In this case, an index of the synchronization block can be determined in consideration of a sequence of the DMRS.

A base station may determine an SS block index associated with an SS block for transmission, and may scramble information based on at least a portion of the determined SS block index. The information may include at least one of a reference signal, data, paging information, control information, broadcast information, or a CRC associated with control information. The base station may transmit the SS block and scrambled information to a UE. A UE may receive an SS block and information scrambled based on at least a portion of an SS block index associated with the SS block. The information may include at least one of a reference signal, data, paging information, control information, broadcast information, or a CRC associated with control information. The UE may descramble the scrambled information based on the at least the portion of the SS block index.

Aspects of the present disclosure implement techniques of a new 3D waveform coding scheme that leverages the spatial properties of 5G NR systems. Specifically, in 5G systems, each UE location may be characterized by three parameters: propagation delay (t.sub.p), angle of elevation (θ), and angle of azimuth (φ). Global coding matrix may be generated by linear combination of these three attributes and a unique lattice code may be generated for each UE at different locations from the base station. Thus, considering the coding gain increases with increasing the distance between the codes, aspects of the present disclosure take advantage of geometrical properties of lattice. Particularly, within the 3D waveform coding, if lattice distance between co-beamed UEs is determined to be greater than threshold radius, a conjugate lattice code for the UEs may be applied in accordance with aspects of the present disclosure.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a receiving node may determine a cyclic redundancy check (CRC) based at least in part on log-likelihood ratios (LLRs) associated with downlink control information (DCI) received from a transmitting node. The receiving node may perform a full unmasking of the CRC using a radio network temporary identifier (RNTI) based at least in part on a descrambling of the CRC with the RNTI, wherein a number of bits associated with the RNTI is associated with a number of bits associated with the CRC. The receiving node may initiate an early termination of a decoding of the LLRs based at least in part on the full unmasking of the CRC. Numerous other aspects are described.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a base station, an indication that indicates whether a common search space (CSS) is associated with a first type of physical downlink control channel (PDCCH) or a second type of PDCCH. The first type of PDCCH may correspond to a cell-broadcast PDCCH and the second type of PDCCH may correspond to a UE-specific PDCCH. The CSS may be for downlink control information (DCI) with a cyclic redundancy check scrambled by a group radio network temporary identifier (G-RNTI) that schedules a multicast and broadcast service (MBS). The UE may receive, from the base station, the first type of PDCCH or the second type of PDCCH. Numerous other aspects are described.