Uplink Cancellation Indication and UCI Multiplexing in PUSCH
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Solution Overview
Problem
Existing wireless communication technologies, such as those in 3GPP Rel-16 NR, face challenges in efficiently managing uplink cancellation and UCI multiplexing due to limited indication granularity and resource availability, particularly in PUSCH and SRS transmissions, leading to potential cancellation of important transmissions and inadequate handling of PUSCH repetition type B.
Innovation Solution
The solution involves enhanced uplink cancellation indication and UCI multiplexing methods, including selective application of UL cancellation, UCI multiplexing in PUSCH repetition types A and B, and improved timeline conditions for determining UCI multiplexing, using DCI formats like DCI format 2_4x for dynamic cancellation adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If enhanced uplink cancellation indication is implemented with finer granularity, then cancellation precision is improved, but device complexity increases
Solution Approach 1:
The cancellation indication is segmented into multiple fields within DCI format 2_4x, including a first field for time-domain resource indication and a second field for frequency-domain resource indication. This segmentation allows fine-grained control over specific time slots and frequency resources without requiring complete reconfiguration of the entire cancellation mechanism, thus improving precision while managing complexity through structured field organization.
Solution Approach 2:
The patent introduces dynamic cancellation indication where the network can flexibly adjust cancellation parameters based on real-time channel conditions and traffic requirements. The DCI format 2_4x enables dynamic modification of time and frequency resource allocations, allowing the system to adapt cancellation strategies dynamically rather than relying on static configurations, thereby achieving precise control without fixed complex hardware architecture.
2Productivity
If UCI multiplexing is implemented in PUSCH repetition type B, then resource utilization is improved, but measurement precision requirements increase
Solution Approach 1:
The patent applies local quality by differentiating treatment for different repetitions within PUSCH repetition type B. Not all repetitions are treated uniformly; instead, the system identifies specific repetitions that satisfy timeline conditions for UCI multiplexing and applies multiplexing only to those. This selective approach optimizes resource utilization in repetitions where UCI can be effectively multiplexed while avoiding premature or inappropriate multiplexing in other repetitions, thereby reducing the stringency of measurement precision requirements across the entire transmission.
Solution Approach 2:
The system performs preliminary determination of timeline conditions before executing UCI multiplexing in PUSCH repetition type B. By pre-evaluating whether a repetition satisfies the necessary timeline requirements (such as minimum time gap between PUSCH and PUCCH), the system can proactively select appropriate repetitions for multiplexing. This preliminary action ensures that only feasible multiplexing operations are executed, improving overall resource utilization while maintaining manageable measurement precision requirements through advance filtering of candidate repetitions.
Data Source
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AI summary
A transceiver can receive (210) scheduling information of at least one PUCCH and at least one PUSCH. The scheduling information can schedule the UE to transmit the at least one PUCCH and the at least one PUSCH. The at least one PUCCH can overlap with the at least one PUSCH in time. The at least one PUCCH can include at least one type of UCI. A controller can multiplex (220) the at least one type of UCI in at least one actual repetition of a PUSCH of the at least one PUSCH. The transceiver can transmit (230) the PUSCH including the multiplexed at least one type of UCI. The PUSCH can overlap with a PUCCH of the at least one PUCCH. The at least one actual repetition of the PUSCH can have a number of symbols no less than a predefined number of symbols.