Aperiodic CSI Reporting During DRX Non-Active Periods
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Solution Overview
Problem
Current wireless communication networks face challenges in reporting channel state information (CSI) during discontinuous reception (DRX) operations, particularly when CSI reporting is multiplexed on a Physical Uplink Shared Channel (PUSCH), as existing MAC specifications do not adequately address how to handle reporting events during DRX configurations.
Innovation Solution
A method and device for a user equipment (UE) to receive Downlink Control Information (DCI) containing aperiodic CSI reporting configurations during DRX mode, allowing the UE to transmit aperiodic CSI reports according to the indicated transmission time, regardless of whether the time falls within active or non-active DRX periods, with the report being transmitted on a Physical Uplink Shared Channel (PUSCH).
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the UE switches off its RF module and suspends control channel monitoring during DRX non-active periods to reduce power consumption, then power consumption is reduced, but CSI reporting cannot be performed during non-active periods
Solution Approach 1:
The UE performs preliminary actions by storing configuration information for aperiodic CSI reporting and maintaining the capability to report CSI during non-active periods. When DCI is received during non-active time, the UE can immediately execute the CSI reporting without needing to remain continuously active, thus reducing power consumption while ensuring reporting reliability when needed.
2Reliability
If the UE transmits aperiodic CSI reports during non-active DRX periods according to DCI timing, then CSI reporting reliability is improved, but power consumption increases due to RF module activation
Solution Approach 1:
The system dynamically adapts CSI reporting behavior based on DRX state. During non-active periods, the UE remains in low-power mode by default but can be dynamically activated to transmit aperiodic CSI reports when DCI is received. This dynamic switching allows the system to maintain reporting reliability while minimizing unnecessary power consumption during periods when reporting is not required.
3Reliability
If the UE monitors PDCCH continuously during active time to detect DCI for aperiodic CSI reporting, then detection of reporting triggers is ensured, but power consumption increases during active periods
Solution Approach 1:
The UE employs periodic monitoring of PDCCH during active time intervals rather than continuous monitoring. The monitoring occurs at predetermined intervals defined by DRX configuration, allowing the UE to detect DCI triggers for aperiodic CSI reporting while reducing power consumption during active periods by suspending monitoring between intervals.
Data Source
AI summary
A method for a user equipment (UE) is disclosed. The method includes receiving, by the UE, Downlink Control Information (DCI), the DCI containing an aperiodic channel state information (CSI) reporting configuration. The method also includes when the DCI is received by the UE during a Discontinuous Reception (DRX) operation mode, transmitting, by the UE, an aperiodic CSI report according to a transmission time indicated by the aperiodic CSI reporting configuration regardless of whether the transmission time for the CSI report is within active or non-active time periods of the DRX operation mode.