METHOD FOR ACTIVATING/DEACTIVATING CELL IN WIRELESS COMMUNICATION SYSTEM AND DEVICE THEREFOR

    公开(公告)号:US20180007731A1

    公开(公告)日:2018-01-04

    申请号:US15544777

    申请日:2016-01-20

    Abstract: A cell activation/deactivation method in a wireless communication system and an apparatus therefor are disclosed. Specifically, a method for activating/deactivating a secondary cell (SCell) by a UE in a wireless communication system supporting carrier aggregation includes: receiving an SCell addition related message from an eNB; partially activating one or more first SCell when a partial activation related message for the first SCell from among a plurality of SCells added according to the SCell addition related message is received from the eNB; and fully activating one or more second SCell when a full activation related message for the second SCell from among the plurality of SCells added according to the SCell addition related message is received from the eNB, wherein normal SCell operations are applied to the second SCell and only some of the normal SCell operations are applied to the first SCell.

    METHOD FOR REPORTING CHANNEL STATE IN WIRELESS COMMUNICATION SYSTEM, AND APPARATUS THEREFOR

    公开(公告)号:US20170366997A1

    公开(公告)日:2017-12-21

    申请号:US15533298

    申请日:2015-12-23

    Abstract: A method for reporting channel state for an unlicensed band in a wireless communication system, according to an embodiment of the present invention, is performed by a terminal, and may comprises the steps of: blind-detecting a reference signal in an unlicensed band cell (UCell) subframe according to the setting of a plurality of channel state reports; determining, according to the blind detection result, whether or not the UCell subframe is an available resource for the channel state reports; and if the UCell subframe is determined to be an available resource for the channel state reports, calculating a value for the channel state reports using the reference signal detected in the UCell subframe.

    METHOD FOR PERFORMING BACKOFF IN WIRELESS CONNECTION SYSTEM THAT SUPPORTS UNLICENSED BANDS, AND APPARATUS SUPPORTING SAME

    公开(公告)号:US20170339720A1

    公开(公告)日:2017-11-23

    申请号:US15524819

    申请日:2015-11-06

    Abstract: The present invention relates to a wireless connection system that supports unlicensed bands. A method for performing backoff, methods for configuring a reservation signal transmission and a transmission opportunity section, and apparatus supporting the same. A method for performing a backoff operation in a wireless connection system supporting unlicensed bands, that is an embodiment of the present invention, may comprises the steps of: configuring a backoff counter N so as to perform a backoff operation; determining whether a current sub-frame is a back-off permitted section; performing a carrier sensing (CS) operation for checking if an unlicensed band is in an idle state if the sub-frame is within a backoff permitted section, for each CS unit; decreasing the backoff counter N by 1 after performing the CS operation; and transmitting a reservation signal or data using a U cell that is formed in an unlicensed band if the backoff counter value expires. In this regard, the CS operation is not performed in sub-frames except for the backoff permitted section and the backoff counter value can be maintained continuously.

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