Abstract: Methods and apparatuses for contention window adjustment on a sidelink (SL) in a wireless communication system. A method of a user equipment (UE) includes determining whether hybrid automatic repeat request (HARQ) feedback is available after a last update of a contention window size (CW); determining a set of HARQ feedback corresponding to physical sidelink shared channels (PSSCHs) in a reference duration when the at least one HARQ feedback is determined as available; and determining a first condition based on the set of HARQ feedback. The method further includes determining to: reset the CW to a minimum allowed value when the first condition is satisfied or increase the CW to a next higher allowed value when the first condition is not. The method further includes performing a SL channel access procedure based on the CW and performing a SL transmission over a channel after successfully performing the SL channel access procedure.

Abstract: Apparatuses and methods for dynamic adaptation on periodic or semi-persistent uplink transmissions are provided. A method of user equipment (UE) in a wireless communication system includes receiving a set of configurations from a higher layer, identifying, from the set of configurations, a first set of configurations indicating resources for a periodic or semi-persistent uplink transmission, and identifying, from the set of configurations, a second set of configurations for a physical downlink control channel (PDCCH) including a downlink control information (DCI) format, wherein the DCI format includes adaptation information.

Abstract: A UE in a wireless communication system is provided. The UE comprises at least one processor configured to identify a DTTC including at least one of a first periodicity, a duration of a first transmission window, or a first timing offset of the first transmission window, wherein the DTTC is identified for the DSCH or RLM in a serving cell, and identify a DMTC including at least one of a second periodicity, a duration of a second transmission window, or a second timing offset of the second transmission window, wherein the DMTC is identified for RRM measurement based on the DSCH. The UE further comprises a transceiver operably connected to the processor, the transceiver configured to receive, from a BS, at least one DSCH from a set of DSCH over unlicensed downlink channels based on the identified DTTC, wherein the received at least one DSCH includes a SS/PBCH block.

Abstract: Apparatuses and methods for dynamic adaptation of a time domain resource for periodic or semi-persistent downlink signal are provided. A method of operating a user equipment (UE) includes receiving a set of configurations from a higher layer, identifying a first set of configurations from the set of configurations indicating resources for reception of downlink signals, and identifying a second set of configurations from the set of configurations for a physical downlink control channel (PDCCH) including a downlink control information (DCI) format. The DCI format includes adaptation information. The method further includes receiving the downlink signals based on the first set of configurations, receiving the PDCCH including the DCI format based on the second set of configurations, identifying, based on the adaptation information, a third set of configurations indicating the resources for reception of the downlink signals, and receiving the downlink signals based on the third set of configurations.

Abstract: Methods and apparatuses for initiating channel occupancy in a semi-static mode SL channel access in a wireless communication system. A method of a user equipment (UE) includes receiving, from a higher layer, an indication on a semi-static mode SL channel access, receiving a set of configurations for the semi-static mode SL channel access, including a duration of a period and determining a first portion of the period as a channel occupancy associated with the period. The method further includes determining a second portion of the period as an idle duration associated with the period, performing a SL channel access procedure in the idle duration associated with the period, and transmitting a first SL transmission over a channel in the channel occupancy associated with the period after successfully performing the SL channel access procedure.

Abstract: A base station (BS) in a wireless communication system is provided. The BS comprises a processor configured to determine frequency units within a frequency range for a bandwidth of an operating carrier, wherein a listen-before-talk (LBT) operation is performed over each of the frequency units; and determine, for each of the frequency units, a set of intended spatial transmit (TX) parameters and a set of spatial receiver (RX) parameters of the LBT operation; and determine a subset of the frequency units for a downlink transmission based on the LBT operation performed over each of the frequency units; and a transceiver operably connected to processor, which is configured to transmit, to a user equipment (UE), downlink channels using the bandwidth corresponding to the determined subset of the frequency units.

Abstract: Apparatuses and methods for time domain resource allocation for a physical sidelink feedback channel (PSFCH) with carrier aggregation are provided. A method of a user equipment (UE) includes receiving a set of configurations from a higher layer and a carrier indicator field in a physical channel. The method further includes identifying, based on the set of configurations, a resource pool including resource blocks (RBs) for transmission of PSFCHs; identifying, based on the set of configurations, a first carrier frequency from a set of carrier frequencies based on the carrier indicator field; and determining a first set of RBs from the resource pool for transmission of a first PSFCH in the first carrier frequency. The method further includes determining a first transmission occasion for the first PSFCH and transmitting the first PSFCH in the first transmission occasion using the first set of RBs in the first carrier frequency.

Abstract: Methods and apparatuses for channel access procedure priority on a sidelink (SL) in a wireless communication system. A method of a user equipment (UE) includes determining a type of a SL channel access procedure before a SL transmission, which is a Type 1 SL channel access procedure or a Type 2 SL channel access procedure, and determining, based on a type of the SL transmission, a channel access priority class (CAPC) when the type of the SL channel access procedure is the Type 1 SL channel access procedure, wherein the CAPC is associated with a parameter p. The method further includes performing, based on the type of the SL channel access procedure and the CAPC, the SL channel access procedure before the SL transmission and performing the SL transmission if the SL channel access procedure is successfully performed.

Abstract: Methods and apparatuses for discovery burst transmission for a sidelink (SL) in a wireless communication system. A method of a user equipment (UE) includes identifying a set of sidelink (SL) synchronization signals and physical SL broadcast channel (S-SS/PSBCH) blocks for a SL discovery burst, determining a transmission duration of the SL discovery burst, and determining a duty cycle of the SL discovery burst. The method further includes determining, based on the transmission duration and the duty cycle, a type of SL channel access procedure; performing, based on the type of SL channel access procedure, a SL channel access procedure; and transmitting the SL discovery burst after successfully performing the SL channel access procedure.

Abstract: Methods and apparatuses for synchronization signal and physical broadcast channel (SS/PBCH) block frequency location indication and multi-slot physical downlink control channel (PDCCH) monitoring in a wireless communication system A method of a user equipment (UE) includes receiving a first SS/PBCH block; determining a value of kSSB based on the first SS/PBCH block; determining that a first control resource set (CORESET) for a Type0-PDCCH common search space (CSS) set is not present; and determining a global synchronization channel number (GSCN) of a second SS/PBCH block as NGSCNReference+NGSCNOffset·NGSCNStep, when the value of kSSB is within a range. The first CORESET is associated with the first SS/PBCH block. A second CORESET for a Type0-PDCCH CSS set associated with the second SS/PBCH block is present. The method further includes receiving the second SS/PBCH block according to the determined GSCN of the second SS/PBCH block.

Abstract: An apparatus and method of a network entity in a wireless communication system is provided. The apparatus and method comprises: identifying a non-terrestrial network (NTN) type associated with an NTN; configuring a set of operational parameters for performing wireless communication based on the NTN type; identifying, based on a network configuration associated with the NTN, one or more interfaces to transmit information indicating the NTN type; and transmitting, to a user equipment (UE) or a network function (NF), the information indicating the NTN type via the identified one or more interfaces.

Abstract: Methods and apparatuses for frequency domain enhancement on physical sidelink feedback channel (PSFCH) in a wireless communication system. A method of operating user equipment (UE) includes receiving a physical sidelink shared channel (PSSCH) that enables a hybrid automatic repeat request (HARQ) feedback and determining an interlace from a set of interlaces. Each interlace in the set of interlaces includes a first set of resource blocks (RBs) with a uniform interval. The method further includes determining a RB set with contiguous RBs, determining, based on an intersection between the interlace and the RB set, a second set of RBs for a physical sidelink feedback channel (PSFCH) transmission, performing a sidelink (SL) channel access procedure and transmitting, after successfully performing the SL channel access procedure, the PSFCH carrying the HARQ feedback in the second set of RBs.

Abstract: A method for a user equipment (UE) to provide hybrid automatic repeat request acknowledgement (HARQ-ACK) information includes transmitting physical sidelink shared channels (PSSCHs), where each of the PSSCH transmissions provides a transport block (TB); receiving physical sidelink feedback channels (PSFCHs); and generating values for HARQ-ACK information bits from the PSFCH receptions. The PSFCH receptions correspond to the PSSCH transmissions and the values of the HARQ-ACK information bits correspond to the TBs in the PSSCH transmissions. The method further includes generating a HARQ-ACK codeword that includes the values of the HARQ-ACK information bits arranged in a predetermined order and transmitting the HARQ-ACK codeword in a physical uplink control channel (PUCCH).

Abstract: A method of a first UE comprises: determining a sidelink synchronization identity (SL-SID) and a set of resources; generating at least one sidelink synchronization signal and physical broadcast channel (S-SSB) based on the SL-SID and the set of resources, wherein each S-SSB of the at least one S-SSB includes first two symbols for a sidelink primary synchronization signal (S-PSS) and second two symbols for a sidelink secondary synchronization signal (S-SSS); generating a first sequence corresponding to the S-PSS, wherein the first sequence is determined based on a binary phase shift keying (BPSK) modulated M-sequence with a 127 of sequence length and a low cross-correlation with a PSS; generating a second sequence corresponding to the S-SSS, wherein the second sequence is determined based on a BPSK modulated Gold-sequence with a 127 of sequence length; and transmitting, the at least one S-SSB over sidelink channels established with the second UE.

Abstract: Apparatuses and methods for transmission window determination for a physical sidelink feedback channel (PSFCH) in a wireless communication system. A method of user equipment (UE) includes receiving a set of configurations from a higher layer and receiving a physical sidelink shared channel (PSSCH). The PSSCH enables hybrid automatic repeat request (HARQ) feedback. The method further includes determining a transmission window for a PSFCH; performing a sidelink (SL) channel access procedure before a transmission occasion in the one or multiple transmission occasions; and transmitting the HARQ feedback in the transmission occasion for the PSFCH over a channel upon successfully performing the SL channel access procedure. The transmission window includes the one or multiple transmission occasions for the PSFCH and the one or multiple transmission occasions are based on at least one of: a window offset, an interval between two neighboring transmission occasions, and a number of transmission occasions.

Abstract: Methods and apparatuses of a BSs and UEs in a wireless communication system are provided. A method of operating the UE comprises: receiving, from a BS over a shared spectrum channel, a first DCI including a COT of the BS; determining a first portion of the COT for a downlink transmission from the BS and a second portion of the COT for an uplink transmission to the BS, wherein the COT includes a gap between the first and second portions of the COT; performing a channel access procedure based on a duration of the gap; receiving the downlink transmission in the first portion of the COT; and transmitting the uplink transmission in the second portion of the COT based on a sensing status of the shared spectrum channel that is sensed as an idle state during the channel access procedure in the duration of the gap.

Abstract: A UE in a wireless communication system is provided. The UE comprises a transceiver configured to receive SS/PBCH block over downlink channels using a set of parameters based on an operation mode. The operation mode is configured for the SS/PBCH block as a first operation mode in which the SS/PBCH block is used on a LAA Scell or a second operation mode in which the SS/PBCH block is at least used on a Pcell. The set of parameters is configured as a first set of parameters for the SS/PBCH block when the operation mode of the SS/PBCH block is configured as the first operation mode or a second set of parameters for the SS/PBCH block when the operation mode of the SS/PBCH block is configured as the second operation mode. The first and second set of parameters include different information each other.

Abstract: A method of a user equipment (UE) for power saving is provided. The method comprises receiving, from a serving cell, a set of configurations, receiving a power saving signal (PoSS) from a first downlink channel based on the received set of configurations, acquiring a first part of information for power saving from the PoSS, receiving, based on the received set of configurations, a second downlink channel that is a control channel, and acquiring a second part of information for the power saving from the received second downlink channel.

Abstract: Methods and apparatuses for time adjustment during handover in non-terrestrial networks. A method of operating a user equipment (UE) includes receiving configuration information for a first and a second RS and receiving the first RS from a first base station (BS) and the second RS from a second BS. The method also includes measuring a time of arrival of the second RS relative to a time of arrival of the first RS, determining a differential propagation delay between the first RS and the second RS based on the times of arrival. The method further includes determining a transmission time for an uplink (UL) UE-dedicated channel to the second BS based on the differential propagation delay and transmitting the UL UE-dedicated channel to the second BS based on the determined time.

Abstract: Methods and apparatuses in a wireless communication system operating with shared spectrum channel access. A method of operating a UE includes receiving an SS/PBCH block; determining a higher-layer parameter ssb-SubcarrierOffset based on an MIB of a PBCH included in the SS/PBCH block; determining a bit (??+5) from a payload of the PBCH; and determining a first value (kSSB) based on a second value (kSSB). Four LSBs of the second value (kSSB) are indicated by the higher-layer parameter ssb-SubcarrierOffset and an MSB of the second value (kSSB) is indicated by the bit (??+5).