A method for performing radio communication by a first apparatus, and an apparatus for supporting same may be provided. The method may comprise the steps of: obtaining second bits by attaching cyclic redundancy check (CRC) bits to first bits associated with second sidelink control information (SCI); obtaining third bits on the basis of channel coding for the second bits; obtaining fourth bits by performing rate matching on the third bits on the basis of the number of modulation symbols, wherein the number of modulation symbols is obtained on the basis of the number of first bits, the number of CRC bits, a beta-offset value included in first SCI associated with the second SCI, an alpha value configured for each resource pool, the number of symbols associated with transmission of a physical sidelink shared channel (PSSCH), the number of resource elements (Res) associated with transmission of the second SCI for each symbol, and a gamma value, the gamma value being the number of vacant REs in a resource block (RB) to which a last symbol associated with the second SCI belongs; and transmitting the second SCI to a second apparatus via the PSSCH on the basis of scrambling, modulation, and mapping for the fourth bits.

Disclosed are a communication technique which merges, with IoT technology, a 5G communication system for supporting a data transmission rate higher than that of a 4G system, and a system therefor. The present disclosure can be applied to intelligent services (for example, smart homes, smart buildings, smart cities, smart cars or connected cars, healthcare, digital education, retail, security- and safety-related services, and the like) on the basis of 5G communication technology and IoT-related technology. A method for a terminal of a communication system may comprise the steps of: receiving, from a base station, information indicating LBRM; identifying a parameter related to the maximum number of layers for one transport block; identifying the maximum number of layers for the one transport block on the basis of the parameter; identifying a transport block size to which the LBRM is applied, on the basis of the determined maximum number of layers; and transmitting or receiving data to or from the base station on the basis of the transport block size.

Embodiments of this application disclose a channel puncture mode indication method and a related apparatus, which are applied to a wireless local area network (WLAN) system, for example, a WLAN system supporting 802.11be. The method includes: An access point sends a multi-user request to send MU-RTS frame, where the MU-RTS frame includes a common information field, the common information field includes channel puncture information, and the channel puncture information indicates whether at least one 20 MHz channel is occupied.

Embodiments of a User Equipment (UE) and methods for communication are generally described herein. The UE may be configured for carrier aggregation using a primary component carrier (CC) and a secondary CC. The UE may attempt to detect a sidelink synchronization signal (SLSS) from another UE on the primary CC. The UE may, if the SLSS from the other UE is detected: determine, based on the detected SLSS, a common time synchronization for the primary CC and the secondary CC for vehicle-to-vehicle (V2V) sidelink transmissions in accordance with the carrier aggregation. The UE may, if the SLSS from the other UE is not detected: transmit an SLSS to enable determination of the common time synchronization for the primary CC and the secondary CC by the other UE. The SLSS may be transmitted on the primary CC.

A circuit arrangement includes a control circuit configured to identify a candidate message in received control data that indicates a potential location of an encoded message in the received control data, the candidate message having a predefined message bit length, a measurement circuit configured to perform a radio measurement, the control circuit further configured to compare the radio measurement to a predefined threshold, and a decoding circuit further configured to, if the radio measurement satisfies the predefined threshold, search for the encoded message in the received control data by decoding the candidate message from the received control data with a reduced message bit length less than the predefined bit length.

Wireless communications systems and methods related to transmission of reverse-link grants for anchor based sidelink communication are provided. A first user equipment (UE) determines a plurality of reverse-link grants for a respective plurality of UEs. The first UE transmits first sidelink control information (SCI) over a physical sidelink control channel (PSCCH). The first SCI may indicate whether user data follows in the physical sidelink shared channel (PSSCH). The first UE transmits a demodulation reference signal (DMRS) and second SCI over the PSSCH. The second SCI comprises the plurality of reverse-link grants in a block. The second SCI is rate matched from a with the DMRS and the third SCI being rate matched from the start of the PSSCH and including the block of reverse-link grants.

Wireless communications systems and methods related to cross Component Carrier (CC) transmission are provided that assist in minimizing PAPR. A first wireless communications device repeats data across multiple CCs in order to increase coverage while maintaining power levels within approved limits. In order to reduce PAPR, a number of different methods and mechanisms may be used. Rate matching may be performed across the multiple CCs as though a single virtual BWP. Alternatively, each copy of the data on its separate CC may be modified differently in some way, such as by using different scrambling IDs or different redundancy versions. Additionally, when utilizing DFT-s-OFDM modulation, an alternative method is provided which may lower PAPR. The DFT method includes performing a DFT on the combined data, tone mapping to each of the carriers, and performing an IFFT for each carrier individually. Each IFFT may be different than the other.

This application provides a method for communicating a modulation and coding scheme (MCS). A terminal device obtains a modulation order, a code rate, or a spectral efficiency, determines an index of a reference MCS from a mapping table based on the obtained modulation order, code rate, or spectral efficiency, and reports the index of the reference MCS to a network device. The mapping table includes one or more mapping relationships between an MCS index and a modulation order, a code rate, or a spectral efficiency. The terminal device may process uplink or downlink data based on the determined MCS, thereby improving data transmission reliability.

Provided in embodiments of the present application are a data transmission method, a terminal device and a network device, through which uplink data transmission can be performed when the channel detection bandwidth is inconsistent with the carrier bandwidth or the data transmission bandwidth of the system, thereby improving utilization efficiency for frequency spectrum resources of an unlicensed frequency spectrum. The method includes: receiving, by a terminal device, scheduling information transmitted by a network device; performing, by the terminal device, rate matching on the first transport block to obtain first data; determining, by the terminal device, an uplink transmission mode; and performing, by the terminal device, channel detection on the first carrier, and transmitting, according to a detection result and the uplink transmission mode, the first data to the network device through the first time-frequency resources.

Methods, systems, and devices for wireless communications are described. A user equipment (UE) may rate match an uplink transmission around a set of resources reserved by a base station. The base station may indicate a set of reserved resources which overlaps an uplink resource allocation to the UE. The base station may transmit an indicator of the reserved resources, and the UE may identify a location of a clear channel assessment (CCA) gap in a symbol period relative to the reserved resources. By rate matching around the reserved resources and one or more CCA gaps, the UE may transmit uplink information despite the allocated uplink resources colliding with the reserved resources.