Innovative Technology Lab Co., Ltd.

The present disclosure relates to a method and apparatus for discontinuous reception (DRX) for a link between a network and a user equipment (UE) based on device-to-device (D2D) communication in a wireless communication system. A method for DRX of a first UE in a wireless communication system may include receiving, from a second UE, hybrid automatic repeat request (HARQ) feedback information related to sidelink data transmitted from the first UE; transmitting, by the first UE, HARQ NACK information to a base station in an uplink based on the HARQ feedback information from the second UE; sleeping during an operation of the first timer that starts after the first UE transmits the HARQ NACK information; and monitoring a downlink control channel that includes resource allocation information on a sidelink data retransmission during an operation of a second timer that starts after the first timer expires.

The present disclosure relates to a partial sensing method and apparatus for device-to-device (D2D) communication in a wireless communication system. Disclosed is a method of selecting a resource for D2D communication based on partial sensing in a wireless communication system, the method including receiving a transmission resource reservation period and a reception resource reservation period from a base station through upper layer signaling; determining a selection window; determining a sensing window for partial sensing based on the selection window, based on the transmission resource reservation period; excluding an overlapping resource through sensing in the determined sensing window; and performing transmission by selecting a resource for transmitting control information and data in the selection window based on the excluded resource information. The reception resource reservation period received through upper layer signaling may be set to a limited value based on the transmission resource reservation period.

The present disclosure relates to a method and device for determining a resource to be sensed for device-to-device (D2D) communication in a wireless communication system. A method of performing sensing for device-to-device (D2D) communication in a wireless communication system according to an aspect of the present disclosure may include receiving, by a first user equipment (UE), sidelink control information (SCI) in slot m; determining a first exclusion candidate based on a reception power measurement value of a data channel corresponding to the SCI; determining slot m+Gap in which the same data as in the slot m is transmitted; determining a second exclusion candidate based on the slot m+Gap; excluding a resource in which the first and second exclusion candidates and a candidate to be sensed overlap from a resource to be sensed; and performing sensing on the resource to be sensed.

Provided is a method of performing, by a user equipment (UE), wireless communication in a wireless communication system, the method including generating a first message and transmitting the generated first message. Here, a transmission format for transmitting the first message may be determined depending on whether transmission profile (Tx profile) information is transmitted from an upper layer of the UE.

Sidelink downlink control information may include a first indicator field that indicates a sidelink hybrid automatic repeat request (HARQ) feedback timing. A bitwidth of the first indicator field may be based on at least one of one or more parameters from the base station. The first wireless user device may transmit, based on the SL DCI and to a second wireless user device, a first sidelink signal. The first wireless user device may receive, during a first time interval and from the second wireless user device, first sidelink HARQ feedback information responsive to the first sidelink signal. The first wireless user device may determine, based on the sidelink HARQ feedback timing and based on the first time interval, a second time interval. The first wireless user device may transmit, during the second time interval and to the base station, the first sidelink HARQ feedback information.

The present disclosure can provide a method in which a terminal performs transmission in a wireless communication system. The method for performing transmission can comprise the steps in which: a terminal receives a plurality of pre-configured resources; the device confirms as to whether the plurality of pre-configured resources collide; the terminal selects any one pre-configured resource among a plurality of collided pre-configured resources; and transmission for the selected preconfigured resource is performed.

Provided is a method of transmitting a Physical Uplink Shared Channel (PUSCH) in a special subframe by a User Equipment (UE). The method includes receiving an Uplink (UL) grant from a base station, the UL grant being included in a downlink time period of Time Division Duplex (TDD) cell, wherein the TDD cell having TDD UL/DL configuration 1, 2 or 6; determining a resource in an Uplink Pilot Time Slot (UpPTS) of a special subframe of the TDD cell to transmit a PUSCH associated with the received UL grant, wherein the special subframe, having subframe number 1 or 6, consists of a Downlink Pilot Time Slot (DwPTS), a guard period (GP), and the UpPTS; transmitting, from the UE, the PUSCH mapped to the resource in the UpPTS; and receiving a Physical Hybrid Automatic Repeat Request Indicator Channel (PHICH) responsive to the PUSCH.

Sidelink downlink control information (SL DCI) associated with transmission of one or more sidelink signals may be communicated. A wireless user device may transmit, based on the SL DCI and to one or more second wireless user devices, the one or more sidelink signals via a first quantity of sidelink channel resources. The wireless user device may receive first sidelink HARQ feedback information responsive to the one or more sidelink signals. The wireless user device may determine, based on a sidelink HARQ feedback timing, a time interval to transmit the first sidelink HARQ feedback information. The wireless user device may determine, based on the first quantity, a sidelink HARQ codebook. The wireless user device may transmit, during the time interval, based on the sidelink HARQ codebook, and to the base station, an uplink signal indicating the first sidelink HARQ feedback information.

A wireless user equipment (UE) that performs a listen before talk (LBT) operation in a sidelink unlicensed band in a wireless communication system may be configured to select a resource pool and a resource for sidelink communication based on a resource pool and resource selection procedure, to perform an LBT procedure using the resource pool and the resource selected based on the sidelink unlicensed band, to verify a consistent LBT failure trigger status based on the LBT procedure, and to select the resource for the sidelink communication based on a transmission resource selection procedure when the consistent LBT failure is triggered.

A first wireless UE that operates in a sidelink unlicensed band in a wireless communication system include at least one antenna configured to transmit and receive one or more wireless signals; at least one processor; and a memory configured to store instructions for the first wireless UE when executed by the at least one processor, and the first wireless UE may be configured to transmit SL data to a second wireless UE through a physical sidelink shared channel (PSSCH), to receive SL hybrid automatic repeat request (HARQ)-ACK information on the PSSCH based on a physical sidelink feedback channel (PSFCH) reception occasion (ROC) associated with the PSSCH, and to generate SL HARQ feedback information based on the SL HARQ-ACK information and report the same to a base station, and based on the unlicensed band, the PSSCH may be associated with a PSFCH ROC set that includes a plurality of PSFCH ROCs.