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User terminal and radio communication method

專(zhuān)利號(hào)
US11178679B2
公開(kāi)日期
2021-11-16
申請(qǐng)人
NTT DOCOMO, INC.（JP Tokyo）
發(fā)明人
Kazuki Takeda; Satoshi Nagata; Lihui Wang; Liu Liu; Huiling Jiang
IPC分類(lèi)
H04W4/00; H04W72/12
技術(shù)領(lǐng)域
sr,tti,stti,spucch,ue,ttis,in,pucch,subframe,prohibit
地域： Tokyo

摘要

The present invention is designed so that, even when communication is made using a plurality of transmission time intervals (TTIs), scheduling requests are transmitted adequately. According to one aspect of the present invention, a user terminal has a transmitting/receiving section that transmits and/or receives using a plurality of transmission time intervals (TTIs) of different durations, and a control section that determines a resource to use to transmit a scheduling request (SR) based on at least one of a first TTI and a second TTI having a shorter TTI duration than the first TTI.

說(shuō)明書(shū)

Although embodiment 1.3.3 is very similar to embodiment 1.3.1, the differences will be explained below. In embodiment 1.3.1, the SR is transmitted at the earliest timing where an SR can be transmitted from the present time regardless of the type of traffic and the duration of TTIs. Meanwhile, embodiment 1.3.3 differs from embodiment 1.3.1 in that, by enabling the above new parameter. SR transmission sTTIs is prioritized when LL traffic is present.

FIG. 8 is a diagram to show an example of SR transmission according to embodiment 1.3.3. In this example, as the SR configuration for long TTIs (1-ms TTIs), a configuration index of 0 is configured in the UE (referring to FIG. 1, the SR starting position is subframe #0, and the SR periodicity is five subframes). Furthermore, as the SR configuration for short TTIs, a configuration index of 155 is configured in the UE (referring to FIG. 4, the SR starting position is sTTI #0 (the first slot in subframe #0), and the SR periodicity is two sTTIs).

Furthermore, in the UE, a prohibit timer expiration time of 5 ms is configured for both long TTIs and short TTIs. In addition, the above sTTI priority control parameter is configured to “enabled.” In first subframe #0, the UE has no LL traffic for a related LCH.

In this case, the UE does not transmit an SR using the sPUCCH in sTTI #0, transmits an SR using the PUCCH in subframe #0, and starts the prohibit timer.

權(quán)利要求

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