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Channel measurement techniques in discontinuous reception scenarios

專(zhuān)利號(hào)
US11503489B2
公開(kāi)日期
2022-11-15
申請(qǐng)人
QUALCOMM Incorporated（US CA San Diego）
發(fā)明人
Pranay Sudeep Rungta; Shailesh Maheshwari; Sanjana Vijaykumar Kalyanappagol; Ankit Verma
IPC分類(lèi)
H04W76/28; H04W24/10; H04B17/318; H04B7/06; H04W72/04; H04L5/00; H04B17/336
技術(shù)領(lǐng)域
ue,drx,channel,csi,may,in,be,reception,or,mode
地域： CA CA San Diego

摘要

Methods, systems, and devices for wireless communications are described for configuring a user equipment (UE) for reference signal measurement while operating according to a discontinuous reception (DRX) configuration. The DRX configuration may include periodic DRX ON-durations, during which the UE is to be in an active mode for reception and transmission of signals, and between which the UE may transition to a low-power inactive mode. One or more reference signals may be scheduled for transmission by the base station during periods in which the UE may be in the inactive mode, and the UE may skip monitoring one or more of the reference signals while in the inactive mode. For one or more reference signal occasions, the UE may determine, based at least in part on a change in a channel quality metric, to be in a limited active mode in order to measure the reference signal.

說(shuō)明書(shū)

For example, the base station 105-a and UE 115-a may establish one or more downlink channels 205 and one or more uplink channels 210. In this example, the base station 105-a may configure CSI-RS transmissions 215 that may be transmitted according to a schedule that is provided by the base station 105-a. The UE 115-a may monitor for the CSI-RS transmissions 215 and perform channel measurements based on the CSI-RSs that are received at the UE 115-a. The UE 115-a may format the channel measurements into channel state feedback reports 220 (e.g., CSI reports) that are transmitted to the base station 105-a according to a CSI reporting configuration (e.g., periodic, semi-persistent, or aperiodic reporting). The base station 105-a may use information from the channel state feedback reports 220 to determine transmission parameters for communications with the UE 115-a (e.g., a MCS, transmit power, etc.). As discussed herein, in some cases the schedule for CSI-RS transmissions 215 may result in CSI-RS transmissions 215 that occur during a scheduled inactive mode of the UE 115-a according to the DRX configuration, and according to techniques provided herein the UE 115-a may be set to be in a limited active mode during one or more CSI-RS transmissions 215. FIG. 3 shows an example of CSI-RSs that may be transmitted during periods where the UE 115-a is in DRX inactive mode, and FIGS. 4 through 6 show several examples of UE 115-a limited active mode timing to provide for CSI-RS 215 measurement.

權(quán)利要求

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