CLI Measurement Scheduling in Cell DRX Inactive Periods
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Solution Overview
Problem
Measuring cross-link interference (CLI) during the inactive period of a cell Discontinuous Reception (DRX) cycle results in power wastage and underestimation due to reduced UE transmissions, making the measurements less meaningful.
Innovation Solution
UEs are configured to skip CLI measurements during the inactive period of the DRX cycle and adjust CLI measurement values using weighted coefficients to account for missed opportunities, based on network control signaling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If CLI measurements are performed during the inactive period of DRX cycle, then measurement continuity is improved, but power consumption increases and measurement accuracy deteriorates
Solution Approach 1:
The patent applies dynamics by making the CLI measurement behavior adaptive rather than static. The UE dynamically adjusts its measurement schedule based on the DRX cycle state, performing measurements only during active periods when the network is actually transmitting. This dynamic adaptation resolves the contradiction by aligning measurement activities with actual network operation states, thereby improving accuracy without unnecessary power consumption during inactive periods.
Solution Approach 2:
The patent changes the temporal parameter of CLI measurements by restricting them to active DRX periods only. This parameter change (from continuous measurement to conditional measurement based on DRX state) directly addresses the contradiction by eliminating power-wasting measurements during inactive periods while maintaining measurement accuracy during periods when interference is actually present.
2Measurement precision
If CLI measurements are performed during the inactive period of DRX cycle, then measurement coverage is improved, but measurement reliability deteriorates due to underestimation of interference
Solution Approach 1:
The patent makes the measurement schedule dynamic by tying it to the DRX active/inactive state. Measurements are performed only during active periods when the network is actually transmitting and interference is present, ensuring that measurements reflect real operating conditions. This dynamic approach prevents underestimation of interference that would occur if measurements were taken during inactive periods when no transmissions occur.
Solution Approach 2:
The patent applies preliminary anti-action by proactively preventing measurements during inactive periods before underestimation can occur. By checking the DRX state before performing measurements and skipping measurements during inactive periods, the system prevents the harmful effect of unreliable measurements before they happen, rather than trying to correct underestimation after it occurs.
3Use of energy by moving object
If CLI measurements are skipped during inactive DRX periods, then power consumption is reduced, but measurement continuity deteriorates
Solution Approach 1:
The patent extracts and removes the unnecessary measurement activities from the inactive DRX periods. By taking out the measurement function during periods when it cannot provide useful information (inactive periods with no network transmissions), the system eliminates power consumption without losing meaningful measurement opportunities. This extraction resolves the contradiction by removing wasteful measurements while preserving all useful measurements during active periods.
Solution Approach 2:
The patent applies the skipping principle by deliberately omitting CLI measurements during inactive DRX periods. This skipping is not a loss but a strategic omission of measurements that would be meaningless anyway. The system rushes through the inactive period without performing measurements, saving power while maintaining measurement continuity during active periods when actual interference assessment is possible.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A user equipment (UE) may skip a cross-link interference (CLI) measurement in a scheduled CLI measurement occasion that at least partially overlaps with an “inactive” period of a cell discontinuous reception (DRX) cycle. UEs served by a cell generally do not transmit during the “inactive” period of the cell DRX cycle as the cell does not monitor for transmissions during the “inactive” period. Accordingly, measuring CLI during the “inactive” period of a cell DRX cycle may waste power at the victim UE and may underestimate CLI. Therefore, a UE may skip one or more CLI measurements in one or more scheduled CLI monitoring occasions that overlap with the “inactive” period of the cell DRX cycle. The network may indicate whether to skip or perform CLI measurements in CLI measurement occasions scheduled during the “inactive” period of the cell DRX cycle.