Apparatuses, methods, and systems are disclosed for enhanced DM-RS configuration. One apparatus in a mobile communication network includes a processor and a transceiver that receives a first indication of a configuration for Demodulation Reference Signal (“DM-RS”), where the DM-RS configuration includes a plurality of DM-RS configuration types. The transceiver also receives a second indication to autonomously switch among the plurality of DM-RS configuration types based on a configured subcarrier spacing value for a channel. The processor performs single channel estimation from multiple indicated antenna ports using the DM-RS configuration.

A method for performing wireless communication by a first device is proposed in an embodiment. The method may comprise the steps of: selecting a synchronization source on the basis of a sidelink synchronization priority; acquiring synchronization on the basis of the synchronization source; transmitting a sidelink-synchronization signal block (S-SSB) to a second device on the basis of the acquired synchronization; transmitting, to the second device, information related to a pattern of a physical sidelink shared channel (PSSCH) demodulation reference signal (DMRS) for decoding a PSSCH through sidelink control information (SCI) on a physical sidelink control channel (PSCCH); mapping the PSSCH DMRS onto a time resource related to the PSSCH on the basis of the information related to the pattern of the SSCH DMRS and an interval of a time resource scheduled for transmission of the PSSCH related to the PSCCH; and transmitting the PSSCH DMRS to the second device through the PSSCH.

A wireless device receives configuration parameters indicating: a control resource set (coreset) configured with a first transmission configuration indicator (TCI) state and a second TCI state; and a bitmap comprising a plurality of bits. Each bit of the plurality of bits indicates one of the first TCI state or the second TCI state and is for a respective repetition of repetitions of a downlink control information (DCI). The wireless device receive, via a search space associated with the coreset, each of a plurality of repetitions of a first DCI using an associated TCI state indicated by a respective bit of the plurality of bits.

Methods, systems, and devices for wireless communications are described. A user equipment (UE) may identify a beam used for communicating with a network entity, the beam associated with multiple bandwidth parts (BWPs) including a reference BWP with a first frequency. The UE may receive a BWP configuration from the network entity, the BWP configuration based on changing a frequency for at least one BWP of the multiple BWPs form the first frequency to a second frequency. Additionally or alternatively, the UE may identify a timing threshold associated with a BWP switching operation for multiple BWPs associated with the beam. The UE may switch from the first BWP to a second BWP during the timing threshold. The UE may communicate with the network entity according to the BWP configuration or the second BWP.

An apparatus and method for generating a broadcast signal frame corresponding to a time interleaver supporting a plurality of operation modes are disclosed. An apparatus for generating broadcast signal frame according to an embodiment of the present invention includes a combiner configured to generate a multiplexed signal by combining a core layer signal and an enhanced layer signal at different power levels; a power normalizer configured to reduce the power of the multiplexed signal to a power level corresponding to the core layer signal; a time interleaver configured to generate a time-interleaved signal by performing interleaving that is applied to both the core layer signal and the enhanced layer signal; and a frame builder configured to generate a broadcast signal frame including a preamble for signaling time interleaver information corresponding to the time interleaver, the time interleaver uses one of time interleaver groups, and the time interleaver performs the interleaving by using one of a plurality of operation modes.

The present disclosure relates to a communication scheme for convergence of an IoT technology and a 5G communication system for supporting a higher data transmission rate beyond a 4G system, and a system therefor. The present disclosure may be applied to an intelligent service (for example, a smart home, a smart building, a smart city, a smart car or connected car, healthcare, digital education, retail business, a security and security related service, or the like) on the basis of a 5G communication technology and an IoT related technology. The present invention provides a method for more efficiently transmitting uplink control information and data in a mobile communication system which operates in an unlicensed band or a mobile communication system which requires a channel detection operation.

Methods and apparatus adapted to address asymmetric conditions in a multi-antenna system. In one embodiment, the multi-antenna system comprises a wireless (e.g., 3G cellular) multiple-input, multiple-output (MIMO) system, and the methods and apparatus efficiently utilize transmitter and receiver resources based at least in part on a detected asymmetric condition. If an asymmetric condition is detected by the transmitter on any given data stream, the transmitter can decide to utilize only a subset of the available resources for that stream. Accordingly, the signal processing resources for that data stream are adapted to mirror the reduction in resources that are necessary for transmission. The transmitter signals the receiver that it will only be using a subset of the resources available, and the receiver adapts its operation according to the signaling data it receives. The multi-antenna system can therefore reduce power consumption as well as increasing spectral efficiency on the network.

This application provides a method and apparatus for obtaining a resource indication value. The method includes: a terminal receives downlink control information, which includes a resource indication value determined based on a first bandwidth part and indicates a data channel occupying contiguous virtual resource blocks in a second bandwidth part, and sends or receives the data channel, wherein a number RB.sub.start identifying the starting virtual resource block of the contiguous virtual resource blocks, a quantity L.sub.RBs of the contiguous virtual resource blocks, and the resource indication value RIV satisfy following relation: RB.sub.start=└K.Math.RB′.sub.start┘, and L.sub.RBs=└K.Math.L′.sub.RBs┘, wherein K is a positive number and satisfies K≤└N.sub.RB.sup.BWP2/N.sub.RB.sup.BWP1┘, N.sub.RB.sup.BWP1 referring to a bandwidth of the first bandwidth part, and N.sub.RB.sup.BWP2 referring to a bandwidth of the second bandwidth part; and RIV=N.sub.RB.sup.BWP1(L′.sub.RBs−1)+RB′.sub.start when (L′R.sub.RBs−1)≤└N.sub.RB.sup.BWP1/2┘, or RIV=N.sub.RB.sup.BWP1(N.sub.RB.sup.BWP1−L′.sub.RBs+1)+(N.sub.RB.sup.BWP1−1−RB′.sub.start) when (L′.sub.RBs−1)>└N.sub.RB.sup.BWP1/2┘

An infrastructure equipment that transmits signals representing data via a wireless access interface to a communications device and receives signals representing data via the wireless access interface from the communications device in accordance with a time divided structure in which the wireless access interface is divided into a plurality of repeating time units. The infrastructure equipment provides, in each of a first plurality of the time units, one of a plurality of control channels each configured to schedule one of a plurality of data channels, and provides, in each of a second plurality of time units of the signal transmitted to the communications device, one of the plurality of data channels, the plurality of data channels being formed of one or more bundles of data channels, wherein the infrastructure equipment transmits a bundle status indicator in one or more of the plurality of control channels.

Techniques and devices for wireless communications are described to support communication over multiple component carriers using configured resources. A base station may identify a resource configuration for one or more sets of configured resources for communication with a user equipment (UE) and may indicate the resource configuration to the UE. The base station may transmit a downlink control message to the UE that includes a field to indicate one or more sets of resources that are to be activated or deactivated. The UE may receive the downlink control message and, based on the downlink control message, may identify the one or more indicated sets of resources. The UE may determine, based on the downlink control message, whether the one or more sets of resources is activated or deactivated. The UE and the base station may communicate based on the one or more activated or deactivated sets of resources.