Method for initiating a random access procedure in a carrier aggregation system and a device therefor

    公开(公告)号:US10034312B2

    公开(公告)日:2018-07-24

    申请号:US15535786

    申请日:2016-01-18

    Abstract: The present invention relates to a wireless communication system. More specifically, the present invention relates to a method and a device for initiating a random access procedure in a carrier aggregation system, the method comprising: receiving, from a network, an Radio Resource Control (RRC) signal which configures a new Secondary Cell (SCell) with Physical Uplink Control Channel (PUCCH) resource; checking whether a Time Alignment Timer (TAT) associated with a Timing Advance Group (TAG) to which the new SCell with the PUCCH resource belong is running or not; and initiating a random access procedure on the New SCell in the TAG if the associated TAT is not running.

    Triggering power headroom reporting in TDD system

    公开(公告)号:US10028237B2

    公开(公告)日:2018-07-17

    申请号:US14910873

    申请日:2014-08-05

    Abstract: The present invention relates to a wireless communication system. More specifically, the present invention relates to triggering conditions for power headroom reporting (PHR) in a wireless network employing TDD scheme. According to one aspect of the present invention, the a user equipment (UE), receives information informing the UE of multiple time division duplex (TDD) uplink/downlink (UL/DL) subframe configurations and information on a threshold value for a power headroom reporting (PHR). And, the UE triggers a power headroom reporting (PHR), when a required power backoff due to a power management for any of the multiple TDD UL/DL subframe configurations has changed more than the threshold value.

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