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Channel measurement techniques in discontinuous reception scenarios

專利號
US11503489B2
公開日期
2022-11-15
申請人
QUALCOMM Incorporated(US CA San Diego)
發(fā)明人
Pranay Sudeep Rungta; Shailesh Maheshwari; Sanjana Vijaykumar Kalyanappagol; Ankit Verma
IPC分類
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.

說明書

In some cases, the channel measurement components are transitioned to the ON state after expiration of the ON-duration based on the scheduled CSI measurement being between a predetermined time from the expiration of the ON-duration and from a start of a subsequent ON-duration. In some cases, the channel measurement components are transitioned to the ON state prior to the subsequent ON-duration based on the scheduled CSI measurement being within a predetermined time from a start of the subsequent ON-duration.

The CSI manager 915 may identify a channel measurement schedule that indicates a timing for one or more channel measurements of the UE, where at least a first channel measurement occurs when the UE is to be in the inactive mode of the discontinuous reception cycle configuration. In some examples, the CSI manager 915 may perform the first scheduled channel measurement. In some examples, the CSI manager 915 may reset the counter of skipped channel measurements to an initial value responsive to the performing the first scheduled channel measurement.

The channel quality metric manager 920 may determine that a change in a channel quality metric exceeds a threshold value during a predetermined period before the first channel measurement. In some examples, the channel quality metric manager 920 may compare a current value of the channel quality metric to a prior value of the channel quality metric prior to transitioning to the inactive mode. In some examples, the channel quality metric manager 920 may store, after the comparing, the current value of the channel quality metric to replace the prior value of the channel quality metric.

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