Abstract: A system and a method of random access resource selection are provided. The method includes a target Base Station (BS) transmitting a first Synchronization Signal Block (SSB) to a User Equipment (UE), the first SSB associated with a first contention-free random access resource for the UE to transmit a random access preamble; the target BS transmitting a second SSB to the UE, the second SSB associated with a contention-based random access resource; and in a case that a first Synchronization Signal-Reference Signal Received Power (SS-RSRP) of the first SSB is not greater than an SS-RSRP threshold and a second SS-RSRP of the second SSB is greater than the SS-RSRP threshold, the target BS receiving the random access preamble from the UE using the contention-based random access resource.

Abstract: A method of uplink resource allocation and a user equipment are provided. The method includes: receiving a configuration and the configuration contains at least one configured uplink grant configuration; selecting one of the at least one configured uplink grant configuration in response to a trigger event; determining an uplink resource according to the selected configured uplink grant configuration; and transmitting pending uplink data via the uplink resource.

Abstract: A method performed by a UE for implementing a random access procedure is provided. The method transmits a MSGA, monitoring an MSGB-RNTI within an MSGB time window starting from an earliest symbol of an earliest PDCCH occasion after the MSGA transmission. The method receives the MSGB in a first slot. The MSGB includes a success RAR that contains a HARQ Feedback Timing Indicator, a Physical Uplink Control Channel (PUCCH) Resource Indicator, and a UE Contention Resolution Identity. The method determines, by a MAC entity of the UE, to instruct a lower layer to transmit a HARQ feedback in a second slot in response to the reception of the success RAR. The method delivers, by the MAC entity, the HARQ Feedback Timing Indicator and the PUCCH Resource Indicator to the lower layer, and performs, by the lower layer, a HARQ feedback delivery on an uplink (UL) resource.

Abstract: A method of deriving prediction sample values for decoding video data by a device is provided. A reference wraparound offset syntax specifying an offset used for computing a horizontal wrap-around position is decoded. A luma location is derived based on a product of a value of the reference wraparound offset syntax and a minimum coding block size. A predicted luma sample value is derived by using the luma location.

Abstract: Some embodiments provide a method of decoding a current video block in a video picture. From several partitioning schemes, the method identifies a partitioning scheme that is used to partition the current video block. Based on the identified partitioning scheme, the method selects one derivation to compute a first quantization parameter for the current video block from several candidate derivations for computing the first quantization parameter. The method computes a second quantization parameter for the current video block based at least in part on the computed first quantization parameter. The method then uses the computed second quantization parameter to decode the current video block.

Abstract: The present invention includes: a CCLM prediction derivation portion, for deriving a first parameter and a second parameter by using a sampled luminance value downsampled according to a chrominance format and an intra-frame prediction mode; and a CCLM prediction filter portion, for deriving a prediction image by using the first parameter and the second parameter, wherein the CCLM prediction derivation portion derives the first parameter by deriving a logarithmic value of a luminance difference value, deriving a first value by right-shifting a second value related to the luminance difference value by the logarithmic value, and using a third value acquired by multiplying a fourth value by a chrominance difference value and derives the second parameter by using the first parameter. The fourth value is determined from a reference table by using the first value.

Abstract: A user equipment and a method for scheduling a timeline for cancelling uplink (UL) transmission are provided. The method includes: transmitting a low priority UL channel scheduled by a first downlink control information (DCI) format; receiving a second DCI format scheduling a high priority UL channel; and cancelling transmission of the low priority UL channel and transmitting the high priority UL channel in response to determining that the high priority UL channel overlaps in time with the low priority UL channel, wherein a starting time of the high priority UL channel and an ending time of the second DCI format are separated by an offset greater than an absolute time duration.

Abstract: A method of decoding video data by a device is provided. Level values corresponding to a chroma coding block are received. The chroma coding block is one of chroma coding blocks resulting from partitioning a chroma coding tree block. A luma coding tree block corresponding to the chroma coding tree block is partitioned into luma coding blocks which are organized into quantization groups such that luma quantization parameters are determined for the luma coding tree block. One of the luma quantization parameters that is mapped to the chroma coding block is identified. A predictive quantization parameter is derived by using a value derived from the identified luma quantization parameter. A chroma quantization parameter is determined by adding a delta quantization parameter associated with each of the chroma coding blocks to the predictive quantization parameter. Transform coefficient values are generated based on the determined chroma quantization parameter.

Abstract: A method performed by a sidelink transmitting user equipment (SL TX UE) for sidelink (SL) vehicle to everything (V2X) unicast transmission to a sidelink receiving user equipment (SL RX UE). The method includes: receiving, a Radio Resource Control (RRC) configuration from a base station, the RRC configuration includes at least information for enabling SL Channel State Information (CSI) reporting and first Modulation and Coding Scheme (MCS) information for SL transmission by the SL TX UE; transmitting, a CSI-Reference Signal (CSI-RS) measurement resource configuration to the SL RX UE for deriving an SL CSI report; transmitting, an aperiodic CSI report trigger to the SL RX UE for triggering the SL CSI report in a sidelink control information (SCI); and receiving, the SL CSI report from the SL RX UE in a Physical Sidelink Shared Channel (PSSCH).

Abstract: A method for a BS for processing multiplexed UCI received from a UE is disclosed. The method includes grouping PUCCH resources for CSI and an SR with a low priority and PUCCH resources for a slot-based HARQ-ACK into a first group of PUCCH resources; grouping PUCCH resources for CSI and an SR with a high priority and PUCCH resources for a sub-slot based HARQ-ACK into a second group of PUCCH resources; determining a first set of PUCCH resources in a slot from the first group; obtaining first multiplexed UCI of a first PUCCH resource by a first UCI multiplexing procedure for UCI corresponding to the first set; determining a second set of PUCCH resources in a sub-slot of the slot from the second group; and obtaining second multiplexed UCI of a second PUCCH resource by a second UCI multiplexing procedure for UCI corresponding to the second set.

Abstract: Some of the present implementations provide a method for assembling a target SIB for a target service. The method receives, from a first cell on a first frequency carrier, a plurality of SIB segments of the target SIB, each of the plurality of SIB segments associated with a corresponding value tag. The method stores a first SIB segment in the plurality of SIB segments in a memory of the UE. For each subsequent SIB segment in the plurality of SIB segments, the method determines whether a corresponding value tag of the subsequent SIB segment is the same as the corresponding value tag of the first SIB segment and if they are the same, stores the subsequent SIB segment in the memory of the UE. The method then assembles the target SIB using the stored plurality of SIB segments.

Abstract: A method for random access (RA) performed by a user equipment (UE) is provided. The method includes receiving a first beam failure recovery configuration of an uplink (UL) bandwidth part (BWP); initiating a first RA procedure for notifying a base station of a beam failure occurrence in a serving cell when a number of beam failure instances is larger than or equal to a threshold; receiving a second beam failure recovery configuration of the UL BWP before completion of the first RA procedure; stopping the first RA procedure upon receiving the second BFR configuration of the UL BWP; and initiating a second RA procedure for notifying the base station of the beam failure occurrence regardless of a number of beam failure instances received after stopping the first RA procedure.

Abstract: A logical channel data packet transmission method for a user equipment (UE) is provided. The UE includes a processor configured to perform the following instructions. A packet data control protocol (PDCP) packet data unit (PDU) is duplicated to generate a first PDCP PDU and a second PDCP PDU in a PDCP entity. The first PDCP PDU is transmitted to a first radio link control (RLC) bearer. The second PDCP PDU is transmitted to a second RLC bearer. A first RLC PDU is generated in response to the first PDCP PDU in the first RLC bearer. A second RLC PDU is generated in response to the PDCP PDU in the second RLC bearer. The first RLC PDU and the second RLC PDU are received in a medium access control (MAC) entity associated to the first and second RLC bearers.

Abstract: A method of a physical uplink shared channel (PUSCH) repetition performed by a user equipment (UE) is disclosed. The method comprises receiving, from a base station (BS), a configuration for a first PUSCH transmission, in case a Radio Resource Control (RRC) message including information to configure a slot-based repetition operation for the first PUSCH transmission is received from the BS, not receiving, from the BS, an RRC message including information to configure a non-slot based repetition operation for a second PUSCH transmission during the first PUSCH transmission with the slot-based repetition operation, and in case an RRC message including information to configure a non-slot based repetition operation for the second PUSCH transmission is received from the BS, not receiving, from BS, an RRC message including information to configure a slot-based repetition operation for the first PUSCH transmission during the second PUSCH transmission with the non-slot based repetition operation.

Abstract: A user equipment and a method for a 2-step random access (RA) procedure are provided. The method includes performing a first Listen-Before-Talk (LBT) procedure on a Physical Random Access Channel (PRACH) occasion for transmitting a preamble of a message A (MSGA), performing a second LBT procedure on a Physical Uplink Shared Channel (PUSCH) occasion for transmitting a payload of the MSGA, the payload including a Cell-Radio Network Temporary Identifier (C-RNTI) Medium Access Control (MAC) Control Element (CE), monitoring Physical Downlink Control Channel (PDCCH) candidates for a first random access response (RAR) identified by a message B (MSGB)-Radio Network Temporary Identifier (RNTI) in a MSGB window, and determining whether to monitor the PDCCH candidates for a second RAR identified by the C-RNTI in the MSGB window based on whether the second LBT procedure is successful.

Abstract: Provided in the present invention is a method executed by user equipment, the method comprising: receiving downlink control information (DCI); determining, according to the DCI, a number of subframes occupied by a physical uplink shared channel (PUSCH) transmission comprising one or more PUSCH repetitions; dividing the one or more PUSCH repetitions into one or more blocks of PUSCH repetitions; and determining a redundancy version index for each of the one of more blocks of PUSCH repetitions, where each of the one or more blocks of PUSCH repetitions comprises at least one PUSCH repetition.

Abstract: In a moving image decoding device for decoding encoded data of a tile group splitting a picture into one or more rectangular regions and consisting of one or more segments, a WPP enabled flag for indicating whether a segment in an object tile group is a CTU row having a height of one CTU is decoded, and when the WPP enabled flag is 1, after a CTU at a right end of the CTU row is decoded, an end bit of a first segment having a fixed value is decoded.

Abstract: A prediction image generation method using two prediction images to generate a prediction image by a device is provided. First and second prediction image are generated. Bidirectional prediction gradient change prediction processing is performed by using a first shift value and difference values of the first and second prediction images respectively in horizontal and vertical directions to generate a first, second, third and fourth gradient images. Motion information is derived by using the first and second prediction images, the first, second, third and fourth gradient images, a second shift value, and a third shift value. Motion compensation correction value is derived by using the motion information and the first, second, third and the fourth gradient images. The prediction image is generated by using the first and second prediction images and the motion compensation correction value. The first, second and third shift values are respectively equal to 6, 4 and 1.

Abstract: The present invention provides a user equipment, a method executed by a user equipment, a base station, a method executed by a base station, a mobile control entity, and a method executed by a mobile control entity. The method executed by a user equipment comprises: receiving a paging message from a base station; and determining whether to perform a downlink early data transmission (EDT) preparation operation based on downlink EDT indication information when the user equipment UE initiates an RRC connection establishment procedure or an RRC connection resume procedure based on the paging message.

Abstract: A video decoding apparatus (31) for splitting an image into tiles, splits a tile of the tiles into coding tree units (CTUs), and decodes a video on a per-CTU basis, the video decoding apparatus including a header decoder (3020) configured to decode tile unit information indicating a unit for a size of a tile from header information of a coding stream, and a coding tree (CT) decoder (3021) configured to split the tile into CTUs, wherein the header decoder derives a tile upper left position and a tile size by using the tile unit information.