Method and apparatus for preventing loss of uplink data in wireless communication system

    公开(公告)号:US11622300B2

    公开(公告)日:2023-04-04

    申请号:US17267907

    申请日:2019-09-26

    IPC分类号: H04W36/00 H04W36/08

    摘要: A method and apparatus for preventing loss of uplink data in wireless communication system is provided. A central unit (CU) of an integrated access and backhaul (IAB)-donor receives, from a wireless device, uplink data through a source IAB-node. The CU of the IAB-donor receives, from the source IAB-node, a message which informs that uplink packets among the uplink data are remained on the source IAB-node, wherein the message is related to handover procedures of the wireless device from the source IAB-node to a target IAB-node. The CU of the IAB-donor proceeds the handover procedures, after receiving the uplink packets.

    Method for performing beam measurement in wireless communication system and device therefor

    公开(公告)号:US11575451B2

    公开(公告)日:2023-02-07

    申请号:US17553080

    申请日:2021-12-16

    IPC分类号: H04B7/06 H04B17/24 H04W24/08

    摘要: The present invention provides a method for performing beam measurement in a wireless communication system, and a device for the method. Particularly, a method for a terminal to perform beam measurement in a wireless communication system may comprise: a step of receiving a plurality of reference signals corresponding to a plurality of transmission beams; a step of identifying at least one first transmission beam corresponding to at least one first reception beam included in a first reception beam group, on the basis of measurement performed on the first reception beam group by using the plurality of reference signals; a step of identifying at least one second transmission beam corresponding to at least one second reception beam included in a second reception beam group, on the basis of measurement performed on the second beam group by using the plurality of reference signals; and a step of reporting, to a base station, an index of the identified at least one first transmission beam and an index of the identified at least one second transmission beam, respectively.

    Method for recovering link between terminals in wireless communication system, and device therefor

    公开(公告)号:US11265948B2

    公开(公告)日:2022-03-01

    申请号:US16479149

    申请日:2017-01-20

    摘要: The present invention provides a method for re-establishing a link between terminals in a wireless communication system, and a device therefor. Particularly, the method for a first terminal to re-establish a link with another terminal in a wireless communication system comprises: a step of determining a radio link failure with respect to a radio link with a second terminal; a step of transmitting a first message, requesting measurement for re-establishing the radio link with the second terminal, to a base station on the basis of the determined radio link failure; a step of receiving a second message, including information on the configuration of the measurement, from the base station in response to the transmitted first message; and a step of transmitting, to the base station, a third message including a report on the radio link with the second terminal which has been re-established by performing the measurement based on the information on the configuration.

    Method and apparatus for transmitting uplink data in wireless communication system

    公开(公告)号:US11190314B2

    公开(公告)日:2021-11-30

    申请号:US16087356

    申请日:2017-03-23

    IPC分类号: H04L5/00 H04W72/12 H04W74/08

    摘要: Provided are a method and an apparatus for transmitting uplink data in a wireless communication system. Specifically, a first terminal transmits a random access preamble for requesting a connectionless transmission. The first terminal receives a random access response comprising scheduling information of the uplink data. The first terminal transmits the uplink data, a reference signal selected by the terminal and terminal identification information of the terminal from a first overlapping resource utilized by a second terminal. The first terminal receives, as a response for the uplink data, a response signal comprising a terminal identification information field containing terminal identification information corresponding to each reference signal.

    Method and device for setting space division connection between terminals for V2X communication

    公开(公告)号:US11039285B2

    公开(公告)日:2021-06-15

    申请号:US16341832

    申请日:2017-07-19

    摘要: Provided are a method and a device for setting a space division connection between terminals for V2X communication in a wireless communication system. Specifically, a second terminal requests a connection setting with a first terminal from a base station. The second terminal measures a signal of the first terminal and generates a first beam group pair comprising a transmission beam group of the first terminal, which has a large signal size, and a reception beam group of the second terminal. When the second terminal receives a signal of a third terminal by using the reception beam group of the second terminal, the second terminal measures a signal of the third terminal and generates a second beam group pair comprising a transmission beam group of the third terminal, which has a large signal size, and the reception beam group of the second terminal.

    Method and apparatus for transmitting scheduling request in wireless communication system

    公开(公告)号:US10764917B2

    公开(公告)日:2020-09-01

    申请号:US16301722

    申请日:2017-05-17

    IPC分类号: H04W72/12 H04W72/04 H04W74/08

    摘要: Provided are a method and an apparatus for transmitting a scheduling request in a wireless communication system. Particularly, a terminal receives, from a base station, allocation information for an SR resource and allocation information for an SPS resource. The terminal transmits a scheduling request through the SR resource or the SPS resource. The allocation information for the SR resource indicates that the SR resource is allocated to a first period. The allocation information for the SPS resource indicates that the SPS resource is allocated to a second period. When the scheduling request is transmitted through the SPS resource, the scheduling request is not transmitted through a predetermined plurality of subframes including the SPS resource.

    OPERATION FOR 3D BEAM FORMING IN A WIRELESS COMMUNICATION SYSTEM

    公开(公告)号:US20200259537A1

    公开(公告)日:2020-08-13

    申请号:US16861584

    申请日:2020-04-29

    摘要: Here, operation for 3D beam forming is disclosed. UE, receiving reference signals from one or more base stations (eNBs), may report feedback information comprising precoding matrix information to the one or more eNBs. The precoding matrix information indicates a first type precoding matrix for a horizontal direction and a second type precoding matrix for a vertical direction. eNBs may transmit signals, which are precoded based on a third type precoding matrix for beam forming both on the horizontal direction and the vertical direction.

    Method and device for receiving signal in wireless communication system to which multiplex transmission technique is applied

    公开(公告)号:US10727999B2

    公开(公告)日:2020-07-28

    申请号:US16306254

    申请日:2017-06-19

    摘要: A method and a device for receiving a signal in a wireless communication system to which a multiplex transmission technique is applied are provided. The wireless communication system proposed therein suggests a method for performing multiplex transmission when base stations within a network are synchronized. Particularly, a terminal receives, from a first base station, control information for the transmission of an M number of transmission blocks. The control information includes information for allocating multiplex transmission resources available for the first base station and a second base station during a predetermined subframe. The terminal receives the M number of transmission blocks from the first base station and the second base station via the multiplex transmission resources. Here, the M number of transmission blocks receives from the first base station and the M number of transmission blocks received from the second base station are decoded by using the same reference signal.