Abstract: Systems, apparatuses, and methods for wireless communications are provided. A method may comprise receiving, by a wireless device from a base station, one or more messages comprising downlink control information (DCI) associated with a DCI format; determining that a first field of the DC corresponds to a predefined value, determining that, based on the first field corresponding to the predefined value, the DCI is for a random access procedure associated with a physical downlink control channel (PDCCH) order; determining, based on the determining that the DCI is for a random access procedure associated with a PDCCH order and based on a plurality of fields of the DCI, a random access channel (RACH) occasion; and transmitting, based on the RACH occasion, a random access preamble.

Abstract: Disclosed is a method for transmitting an ACK/NACK signal for an HARQ (Hybrid Automatic Repeat reQuest) in a CA (Carrier Aggregation) system, the method including obtaining at least one transmission resource among first and second transmission resources; configuring a first table showing a relationship in which a combination of at least one of the first and second transmission resources and modulation symbols is mapped to an ACK/NACK signal, and transmitting modulation symbols corresponding to a transmission target ACK/NACK signal in the first table by using transmission resource corresponding to the transmission target ACK/NACK signal in the first table.

Abstract: A vehicle includes a power supplier, a junction block configured to supply power from the power supplier, an integrated central control unit configured to receive the power from the junction block, a controller configured to be receive the power through the integrated central control unit and to control at least one load unit of the vehicle, and a control unit configured to identify a power failure location of the vehicle and to determine a power supply method of the junction block during an autonomous driving of the vehicle, based on power monitoring information of each of the integrated central control unit, the junction block, and the controller and predetermined condition information, the predetermined condition information including power supply state information and power supply method information of each load unit corresponding to each of a plurality of pieces of power failure location information.

Abstract: One or more synchronization procedures in wireless communications are provided. A wireless user device may determine a global navigation satellite system (GNSS) as a synchronization reference source associated with a sidelink synchronization. The wireless user device may determine, based on the GNSS being the synchronization reference source associated with a sidelink synchronization and a subcarrier spacing index for sidelink, a slot number for sidelink communication. The wireless user device may transmit, based on the slot number, a sidelink synchronization signal from the wireless user device to a second wireless user device.

Abstract: A method and apparatus for performing a sidelink Hybrid Automatic Repeat Request (HARQ) operation are provided. The method may include establishing a communication session through an upper layer signaling; receiving configuration information for a HARQ operation through the upper layer; receiving downlink control information (DCI) from a network; transmitting sidelink data through a sidelink channel based on the received DCI; and receiving a response to the sidelink data.

Abstract: Provided is a method and apparatus for receiving a reference signal. A wireless user device may determine, based on a synchronization signal (SS) block index and based on an index associated with a time interval, an initialization value associated with a reference signal for a physical broadcast channel (PBCH). The wireless user device may receive, based on the initialization value and based on a frequency domain shift value, the reference signal via at least one resource element (RE). The reference signal may be mapped, based on the frequency domain shift value, to the at least one RE. The wireless user device may receive the PBCH.

Abstract: Provided is a method and apparatus for performing a random access procedure. A wireless device may transmit a random access preamble and may monitor for a random access response. The wireless device may determine to transmit a second random access preamble or to transmit uplink data responsive to the random access response. A time for preparing the second random access preamble may be determined based on a subcarrier spacing associated with the random access preamble or a subcarrier spacing associated a downlink channel associated with the random access response. A time for preparing the uplink data may be determined based on a subcarrier spacing associated with the uplink data or a subcarrier spacing associated a downlink channel associated with the random access response.

Abstract: The method by which a terminal sets a sidelink resource pool in a wireless communication system comprises steps in which the terminal: receives, from a base station, resource pool configuration information on the basis of upper layer signaling; and performs sidelink communication with another terminal on the basis of the resource pool configuration information, wherein the resource pool configuration information can be information based on a sidelink resource pool configuration of an unlicensed band.

Abstract: Hybrid Automatic Retransmit ReQuest-Acknowledgment (HARQ-ACK) index mapping and uplink resource allocation is performed and controlled for channel selection transmission. A method for transmitting HARQ-ACK information to an eNode-B (eNB) by a User Equipment (UE) includes identifying KPCell as a number of downlink subframe(s) of a PCell associated with an uplink subframe and identifying KSCell as a number of downlink subframe(s) of an SCell associated with the uplink subframe; generating Discontinuous Transmission (DTX) response information for a cell having a smaller number of downlink subframes between the PCell and the SCell; generating HARQ-ACK information including the generated DTX response information and response information on data received by the UE from the eNB; and transmitting the generated HARQ-ACK information to the eNB through the uplink subframe.

Abstract: The present disclosure may provide a method of performing, by a terminal, a Hybrid Automatic Repeat and Request (HARQ) feedback procedure in a new radio (NR) vehicle-to-everything (V2X) system. Here, the method of performing, by the terminal, the HARQ feedback procedure in the NR V2X system may include receiving sidelink (SL) data from a transmitting (Tx) terminal, determining a PSFCH resource including feedback information about the received sidelink data, and transmitting a PSFCH to the Tx terminal through the determined PSFCH resource.

Abstract: Exemplary embodiments provide a method and apparatus for supporting a device-to-device (D2D) communication between user equipments (UEs), the method including: generating, at an evolved NodeB (eNB), D2D scheduling assignment (D2D SA) grant; transmitting the generated D2D SA grant to a transmission (Tx) UTE, the D2D SA grant enabling the Tx UE to transmit an SA to a reception (Rx) UE through a D2D communication; generating, at the eNB, a D2D data grant; transmitting the generated D2D data grant to the Tx UE, the D2D data grant enabling the Tx UE to transmit a Transport Block (TB) to the Rx UTE; generating a separate grant for indicating data overriding; and transmitting the generated separate grant to the Tx UE, the separate grant enabling the Tx UTE to transmit an overriding data to the Rx UE.

Abstract: A method and apparatus for supporting a device-to-device (D2D) communication between user equipments (UEs) are provided. The method of a device-to-device (D2D) communication between user equipments (UEs), the method includes: receiving, at a transmission (Tx) UE, resource assignment information transmitted from an evolved NodeB (eNB), the resource assignment information being associated with a D2D discovery signal to be transmitted in a discovery period; determining, at the Tx UE, that a D2D discovery signal associated with a first discovery type and a D2D discovery signal associated with a second discovery type are to be transmitted in a first subframe included in the discovery period; and in the first subframe, transmitting the D2D discovery signal associated with the second discovery type and dropping the D2D discovery signal associated with the first discovery type.

Abstract: One or more synchronization procedures in wireless communications are provided. A wireless user device may determine a global navigation satellite system (GNSS) as a synchronization reference source associated with a sidelink synchronization. The wireless user device may determine, based on the GNSS being the synchronization reference source associated with a sidelink synchronization and a subcarrier spacing index for sidelink, a slot number for sidelink communication. The wireless user device may transmit, based on the slot number, a sidelink synchronization signal from the wireless user device to a second wireless user device.

Abstract: Provided is a method and apparatus for using an offset between a synchronization signal block and a resource block grid. The method may include receiving, by a user device, a synchronization signal (SS) block comprising a synchronization signal and a physical broadcast channel (PBCH), determining, from the PBCH, a value of a subcarrier offset between the SS block and an RB grid, determining, based on the value of the subcarrier offset and a frequency location of the SS block, the RB grid, and decoding, based on the determined RB grid, one or more of a reference signal, a control channel, or a data channel.

Abstract: A method, apparatus, and system for generating and transmitting a physical broadcast channel (PBCH) are provided. A base station may perform a first scrambling process on PBCHs in a time period before a channel coding, and perform a second scrambling process after the channel coding. PHCH payloads and PBCH DMRS may provide information bits to be used in the scrambling processes.

Abstract: A method for detecting a deadlock of a database management system and recovering from the deadlock includes: updating data stored in a first server and a second server; determining whether the database management system is in a deadlock state by comparing data of the first server with data of the second server; and recovering from the deadlock state by changing data of the first server or the second server so that the data of the first server and the second server are identical.

Abstract: According to an aspect of the present disclosure, there is provided a method of transmitting feedback information from a user equipment (UE) in a new radio (NR) vehicle-to-everything (V2X) system. Here, the method of transmitting feedback information may include performing, by a first UE and a second UE, a session establishment process based on at least one of unicast and groupcast; exchanging, by the first UE and the second UE, ID information in the session establishment process; and completing, by the first UE and the second UE, the session establishment. Here, when the first UE and the second UE complete the session establishment, a physical layer ID representing a session may be determined.

Abstract: A method of performing, by a terminal, a Hybrid Automatic Repeat and Request (HARQ) feedback procedure in a new radio (NR) vehicle-to-everything (V2X) system may include receiving sidelink (SL) data from a transmitting (Tx) terminal, determining a PSFCH resource including feedback information about the received sidelink data, and transmitting a PSFCH to the Tx terminal through the determined PSFCH resource.

Abstract: Disclosed is a method and apparatus for generating information indicating a synchronization signal (SS) block. A method comprises: determining a frequency resource associated with a wireless device; determining, by a base station and based on the determined frequency resource, whether to add or omit a first bitmap indicating a plurality of groups in which at least one synchronization signal (SS) block is transmitted: generating, based on the determining to add the first bitmap, system information comprising a parameter comprising: the first bitmap; and a second bitmap indicating a position of one or more transmission SS blocks in each of the plurality of groups; and transmitting, based on the position, the one or more transmission SS blocks each comprising a Physical Broadcast Channel (PBCH) and a synchronization signal.

Abstract: Provided is a method and apparatus for using an offset between a synchronization signal block and a resource block grid. The method may include receiving, by a user device, a synchronization signal (SS) block comprising a synchronization signal and a physical broadcast channel (PBCH), determining, from the PBCH, a value of a subcarrier offset between the SS block and an RB grid, determining, based on the value of the subcarrier offset and a frequency location of the SS block, the RB grid, and decoding, based on the determined RB grid, one or more of a reference signal, a control channel, or a data channel.