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User terminal and radio communication method

專利號(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
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)

Upon arrival of LL traffic following sTTI index #6, the prohibit timer is still running, so the UE is unable to transmit SRs using the sPUCCH in sTTIs #8 and #10. When the prohibit timer expires at the end of subframe #5, the UE transmits an SR using the sPUCCH in sTTI #12, which is the earliest SR possibility in the sTTIs, and starts the prohibit timer.

Although next subframe #0 is an SR possibility, the prohibit timer is still running, so the UE cannot transmit an SR at this timing. Depending on traffic, it is possible to transmit SRs using subframes or sTTIs (for example, sTTI #4) after the prohibit timer expires.

FIG. 9 is a diagram to show another 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 (referring to FIG. 1, the SR starting position is subframe #0, and the SR periodicity is five subframes) and a prohibit timer expiration time of 5 ms are configured in the UE. Furthermore, as the SR configuration for short TTIs, a configuration index of 155 (referring to FIG. 4, the SR starting position is sTTI #0 (the first slot in subframe #0) and the SR periodicity is two sTTIs) and a prohibit timer expiration time of six sTTIs are configured in the UE.

Furthermore, 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 has no LL traffic for a related LCH in first subframe #0, so the UE does not transmit an SR using the sPUCCH in sTTI #0, and transmits an SR using the PUCCH in subframe #0, and starts the prohibit timer (=5 ms).

權(quán)利要求

1
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