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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

  • BWMHz is the single carrier bandwidth in MHz.
    15.1.5 Channel Access Procedure for Transmission(s) on Multiple Carriers
    An eNB can access multiple carriers on which LAA Scell(s) transmission(s) are performed, according to one of the Type A or Type B procedures described in this Subclause.
    15.1.5.1 Type A Multi-Carrier Access Procedures
    The eNB shall perform channel access on each carrier ci∈C, according to the procedures described in Subclause 15.1.1, where C is a set of carriers on which the eNB intends to transmit, and i=0, 1, . . . q?1, and q is the number of carriers on which the eNB intends to transmit.
    The counter N described in Subclause 15.1.1 is determined for each carrier ci and is denoted as Nci·Nci is maintained according to Subclause 15.1.5.1.1 or 15.1.5.1.2.
    15.1.5.1.1 Type A1
    Counter N as described in Subclause 15.1.1 is independently determined for each carrier ci and is denoted as Nci.
    If the absence of any other technology sharing the carrier cannot be guaranteed on a long term basis (e.g. by level of regulation), when the eNB ceases transmission on any one carrier cj∈C, for each carrier ci≠cj, the eNB can resume decrementing Nci when idle slots are detected either after waiting for a duration of 4·Tsl, or after reinitialising Nci.
    15.1.5.1.2 Type A2

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