Conditional PUSCH Skipping and Repetitions for Cell-Edge Reliability
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Solution Overview
Problem
Current 3GPP standards do not allow simultaneous configuration of PUSCH skipping and PUSCH repetitions at a user equipment (UE), leading to degraded performance in cell edge areas due to poor radio signal quality, which results in false positive and negative detections by the base station.
Innovation Solution
Configuring a UE to suspend or resume PUSCH skipping and repetitions based on radio conditions, allowing both mechanisms to be used together, with the UE autonomously or upon network instruction, to improve transmission reliability in varying signal quality environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If PUSCH skipping is configured at a UE, then uplink transmission overhead is reduced, but transmission reliability deteriorates in cell edge areas with poor radio signal quality
Solution Approach 1:
The patent implements dynamic switching between PUSCH skipping and PUSCH repetitions modes based on real-time radio condition evaluation. The UE autonomously determines whether to apply skipping or repetitions by comparing measured radio conditions against configured thresholds, allowing the system to adapt transmission behavior to current channel quality and thereby maintain reliability while reducing overhead when conditions permit.
Solution Approach 2:
The patent changes the transmission parameter (skipping vs repetitions) based on radio condition parameters. By configuring threshold values for radio quality metrics and dynamically adjusting the transmission mode according to these parameter comparisons, the system optimizes the balance between transmission overhead reduction and reliability maintenance in varying cell edge conditions.
2Reliability
If PUSCH repetitions are configured at a UE, then transmission reliability is improved, but uplink transmission overhead increases
Solution Approach 1:
The system dynamically selects between repetitions and skipping modes based on real-time radio condition assessment. When radio conditions fall below configured thresholds, the UE activates PUSCH repetitions to ensure reliable transmission; when conditions improve above thresholds, the UE switches to skipping mode to reduce overhead, thereby optimizing the trade-off between reliability and overhead.
Solution Approach 2:
The patent adjusts the transmission parameter (number of repetitions or skipping activation) based on measured radio condition parameters and configured thresholds. This parameter-based control mechanism allows the system to increase reliability through repetitions only when necessary, minimizing unnecessary overhead in good radio conditions.
3Adaptability or versatility
If both PUSCH skipping and PUSCH repetitions are simultaneously configured at a UE, then adaptability to varying radio conditions is improved, but device complexity increases
Solution Approach 1:
The patent configures both PUSCH skipping and PUSCH repetitions parameters in advance through RRC signaling before actual transmission occurs. The network pre-configures threshold values, skipping parameters, and repetition parameters, allowing the UE to autonomously switch between modes based on real-time conditions without requiring complex real-time negotiation or configuration changes, thereby managing complexity while maintaining adaptability.
Solution Approach 2:
The UE autonomously determines which mode (skipping or repetitions) to use by evaluating its own measured radio conditions against pre-configured thresholds. This self-service mechanism eliminates the need for continuous network control signaling to switch modes, reducing the operational complexity while preserving full adaptability to varying radio conditions.
Data Source
AI summary
A user equipment (UE) includes a transceiver and a processor. The processor is configured to receive, from a base station and via the transceiver, configuration information including a number of radio conditions indicating when to suspend or resume conditional physical uplink shared channel (PUSCH) skipping. The processor is configured to evaluate whether at least one radio condition of the number of radio conditions is met and, in accordance with the at least one radio condition being met, enable or disable the conditional PUSCH skipping.