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Method and apparatus for channel usage in unlicensed spectrum considering beamformed transmission in a wireless communication system

專利號
US10841914B2
公開日期
2020-11-17
申請人
ASUSTek Computer Inc.（TW Taipei）
發(fā)明人
Jia-Hong Liou; Ming-Che Li
IPC分類
H04W72/04; H04W16/14; H04B7/02; H04L5/00
技術(shù)領(lǐng)域
ue,tti,beam,ul,subframe,scheduling,channel,in,trp,or
地域： Taipei

摘要

A method and apparatus are disclosed from the perspective of a UE (User Equipment). In one embodiment, the method includes the UE monitors or receives a control signal within a channel occupancy, wherein the control signal indicates a number of consecutive TTIs (Transmission Time Intervals) and TTI format(s) related information of the TTIs. The method further includes the UE derives transmission direction of symbols in the TTIs or functionality of symbols in the TTIs from the information. The method also includes the UE considers the last TTI of the indicated TTIs as an ending TTI of the channel occupancy. In addition, the method includes the UE performs DL (Downlink) data reception or UL (Uplink) data transmission until the ending TTI.

說明書

  • UEs that are configured by higher layers with more than one CSI process and when the corresponding DCI format is mapped onto the UE specific search space given by the C-RNTI as defined in [3];
  • UEs that are configured with two CSI measurement sets by higher layers with the parameter csi-MeasSubframeSet, and when the corresponding DCI format is mapped onto the UE specific search space given by the C-RNTI as defined in [3];
  • the 3-bit field applies to UEs that are configured with more than five DL cells and when the corresponding DCI format is mapped onto the UE specific search space given by the C-RNTI as defined in [3];
  • otherwise the 1-bit field applies.
  • SRS request—2 bits. The interpretation of this field is provided in section 8.2 of [3].
  • PUSCH starting position—2 bits as specified in Table 5.3.3.1.1A-1 applicable to only the first scheduled subframe.
  • PUSCH ending symbol—1 bit, where value 0 indicates the last symbol of the last scheduled subframe and value 1 indicates the second to last symbol of the last scheduled subframe.
  • Channel Access type—1 bit as defined in section 15.2 of [3].
  • Channel Access Priority Class—2 bits as defined in section 15.2 of [3].

    • If the number of information bits in format 0B is equal to the payload size for DCI format 1, 2, 2A, 2B, 2C or 2D associated with the configured DL transmission mode in the same serving cell, one zero bit shall be appended to format 0B.

    [ . . . ]

    5.3.3.1.8A Format 4A

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