METHOD AND APPARATUS FOR HANDLING SIDELINK AND UPLINK HARQ-ACK FEEDBACK IN A WIRELESS COMMUNICATION SYSTEM

    公开(公告)号:US20200267597A1

    公开(公告)日:2020-08-20

    申请号:US16796665

    申请日:2020-02-20

    Abstract: A method and apparatus are disclosed. In an example from the perspective of a first device, the first device is configured with a second set of slot offsets by a network. The first device receives, from the network, a second Downlink Control Information (DCI) scheduling a sidelink resource. The first device performs sidelink transmission, to a second device, on the sidelink resource. The first device monitors and/or receives a sidelink hybrid automatic repeat request-acknowledgement (SL HARQ-ACK) feedback from the second device in a fourth slot. The SL HARQ-ACK feedback is associated with the sidelink transmission. The first device derives, based on the fourth slot and a second slot offset value indicated by the second DCI, a third slot for transmitting a SL HARQ-ACK to the network. The second set of slot offsets includes the second slot offset value. The SL HARQ-ACK is set/derived/determined based on the received SL HARQ-ACK feedback.

    Method and apparatus for handling SFI (slot format information) collision in a wireless communication system

    公开(公告)号:US10660091B2

    公开(公告)日:2020-05-19

    申请号:US16050862

    申请日:2018-07-31

    Abstract: A method and apparatus are disclosed from the perspective of a network node. In one embodiment, the method includes the network node transmitting a first slot format information (SFI) to a User Equipment (UE), wherein the first SFI indicates transmitted direction of symbols of a first set of slots. The method also includes the network node transmitting a second SFI carried by a group common physical downlink control channel (PDCCH) to the UE, wherein the second SFI indicates transmitted direction of symbols of a second set of slots, and wherein if the first set of slots and the second set of slots are partially overlapped in time domain and the second SFI is transmitted after the first SFI, transmitted direction of overlapped symbols indicated by the second SFI is aligned with transmitted direction of the overlapped symbols indicated by the first SFI.

    METHOD AND APPARATUS FOR IMPROVING HARQ FEEDBACK IN SHORTENED TTI IN A WIRELESS COMMUNICATION SYSTEM

    公开(公告)号:US20180123743A1

    公开(公告)日:2018-05-03

    申请号:US15793226

    申请日:2017-10-25

    Inventor: Chun-Wei Huang

    Abstract: Methods and apparatuses for improving HARQ feedback in shortened TTI in a wireless communication system are disclosed herein. In one method, a user equipment is configured with a processing interval between receiving a downlink data and transmitting a corresponding acknowledgement (ACK)/negative acknowledgement (NACK) response. The UE receives downlink data with 1 millisecond TTI at a downlink subframe. The UE transmits the ACK/NACK response of the downlink data on a resource at an uplink subframe, wherein the resource is based on an offset value if the processing interval is shorter than 4 milliseconds.

    Method and apparatus for obtaining time alignment regarding multiple TRPS in a wireless communication system

    公开(公告)号:US12156263B2

    公开(公告)日:2024-11-26

    申请号:US17866055

    申请日:2022-07-15

    Abstract: Methods, systems, and apparatuses are provided for enhancing timing alignment for uplink (UL) multi-Transmission/Reception Point (TRP) (or mTRP) scenarios in a wireless communication system. A method for a UE in a wireless communication system can comprise receiving a signaling, wherein the signaling indicates activation for a first TRP and/or is a Physical Downlink Control Channel (PDCCH) signal, determining to perform a first random access procedure on the first TRP, based on the signaling, to obtain a first Time Alignment (TA) information associated with the first TRP, and performing multi-TRP operation on the first TRP associated with the first TA information and a second TRP associated with a second TA information.

    METHOD AND APPARATUS OF HANDLING SIDELINK FEEDBACK TRANSMISSION IN MULTIPLE CARRIERS IN A WIRELESS COMMUNICATION SYSTEM

    公开(公告)号:US20230300815A1

    公开(公告)日:2023-09-21

    申请号:US18122754

    申请日:2023-03-17

    CPC classification number: H04W72/0473 H04W72/40

    Abstract: A method and apparatus are disclosed. In an example from the perspective of a device configured with a set of carriers and/or cells including a first carrier and/or a first cell, the device determines a limited power value based on a maximum transmit power and a number of a set of sidelink feedback transmissions on the set of carriers and/or cells in a transmission time interval (TTI) and/or an occasion. The device determines a first power value based on a first downlink (DL) pathloss in the first carrier and/or the first cell. The device determines a first sidelink transmit power of a first sidelink feedback transmission based on the limited power value and the first power value. The set of sidelink feedback transmissions includes the first sidelink feedback transmission. The device performs the first sidelink feedback transmission, on the first carrier and/or the first cell, based on the first sidelink transmit power.

    METHOD AND APPARATUS FOR SIDELINK DISCONTINUOUS RECEPTION IN A WIRELESS COMMUNICATION SYSTEM

    公开(公告)号:US20230292397A1

    公开(公告)日:2023-09-14

    申请号:US18119179

    申请日:2023-03-08

    CPC classification number: H04W76/28 H04W72/1263 H04W72/0446 H04W72/20

    Abstract: Methods, systems, and apparatuses for Sidelink Discontinuous Reception (SL DRX) in a wireless communication system to avoid ambiguity on slot offset calculations on SL DRX. A method for a UE comprises performing a SL communication associated with a destination Identity (ID), having a SL DRX configuration associated with the SL communication, wherein the SL DRX configuration comprises at least an on-duration timer and a DRX cycle, deriving a first offset associated with the SL communication based on the destination ID and the DRX cycle, deriving a second offset associated with the SL communication based on the destination ID and a number of slots per subframe, starting the on-duration timer after a time period determined based on the second offset from the beginning of a subframe, wherein the subframe is determined based on at least the first offset, and monitoring Sidelink Control Information (SCI) when the on-duration timer is running.

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