METHOD FOR ADJUSTING CONTENTION WINDOW SIZE CONSIDERING PRIORITY CLASS IN WIRELESS ACCESS SYSTEM SUPPORTING UNLICENSED BAND, AND APPARATUS FOR SUPPORTING SAME

    公开(公告)号:US20180249484A1

    公开(公告)日:2018-08-30

    申请号:US15757314

    申请日:2016-07-12

    Abstract: The present invention relates to a wireless access system supporting an unlicensed band, various methods for adjusting a contention window size, methods for performing a carrier sensing process in a single engine and a multi-engine, and an apparatus supporting the same. As one embodiment of the invention, a method for adjusting a contention window size (CWS) in a wireless access system supporting an unlicensed band may comprise: a step of setting a contention window size (CWS) necessary for performing a channel access process for each of priority classes; a step of performing a channel access process for a particular priority class in a channel in an unlicensed band on the basis of the set CWS; a step of performing a downlink transmission related to the particular priority class if it is determined that the channel in the unlicensed band is in an idle state as a result of the channel access process; and a step of making adjustments for all CWS' of priority classes if a triggering event, which relates to a downlink transmission and increases or reduces the CWS for the particular priority class, occurs.

    METHOD AND DEVICE FOR PERFORMING HARQ BASED ON POLAR CODES

    公开(公告)号:US20180175976A1

    公开(公告)日:2018-06-21

    申请号:US15843562

    申请日:2017-12-15

    Abstract: Disclosed herein is method and device for performing a Hybrid Automatic Repeat request (HARQ) based on polar codes in a wireless communication system. A transmitter transmits a first packet to a receiver. The transmitter receives a re-transmission request for the first packet from the receiver. The transmitter transmits a second packet to the receiver. Herein, each of the first packet and the second packet includes at least one information bit and at least one frozen bit. An information bit having a smallest mutual information corresponding to a bit channel within the first packet is re-transmitted through a first bit channel capable of transmitting at least one information bit included in the second packet. Alternatively, a new information bit is transmitted through a second bit channel capable of transmitting at least one information bit included in the second packet.

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