Multi-Slot PUSCH UCI Multiplexing for Reliable Resource Allocation
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Solution Overview
Problem
There is a need for improved methods in 5G NR technology to efficiently multiplex uplink control information (UCI) with physical uplink shared channel (PUSCH) transmissions across multiple slots, addressing challenges in resource allocation and handling of UCI overlap in wireless communication systems.
Innovation Solution
A method and apparatus for multiplexing UCI in a segment of a multiple slot PUSCH transmission, utilizing slot-based, transmission occasion-based, or segment-based interleaving and redundancy version cycling, depending on the type of transmission occasion, to optimize resource allocation and UCI handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If UCI is multiplexed in a single slot of multiple slot PUSCH transmission, then resource allocation is simplified, but UCI transmission reliability is reduced
Solution Approach 1:
The patent divides the multiple slot PUSCH transmission into segments, with UCI multiplexed in specific segments (e.g., first slot, last slot, or intermediate slots) rather than a single location. This segmentation allows UCI to be transmitted across multiple transmission opportunities, improving reliability while maintaining manageable resource allocation through defined segment selection rules.
2Reliability
If UCI is multiplexed across multiple slots, then UCI transmission reliability is improved, but resource allocation complexity increases
Solution Approach 1:
The patent enables dynamic selection of which slots or segments will carry UCI multiplexing based on transmission conditions, slot configuration, and network requirements. The UE can adaptively determine UCI multiplexing locations across multiple slots, allowing flexibility to improve reliability while managing complexity through condition-based decision-making.
Solution Approach 2:
The patent establishes predetermined rules and configurations for UCI multiplexing across multiple slots, including defined patterns for segment selection, redundancy version cycling, and interleaving strategies. These preliminary configurations reduce runtime decision complexity while enabling reliable multi-slot UCI transmission through pre-planned resource allocation patterns.
3Reliability
If slot-based interleaving is used for UCI multiplexing, then UCI transmission robustness is improved, but processing complexity increases
Solution Approach 1:
The patent applies slot-based interleaving that divides UCI data into segments distributed across multiple slots, with each slot containing a portion of the interleaved UCI elements. This segmentation approach improves robustness against slot-level failures while the interleaving pattern is designed to balance distribution, reducing peak processing complexity compared to non-interleaved approaches.
4Reliability
If redundancy version cycling is applied across multiple slots, then UCI decoding reliability is improved, but transmission overhead increases
Solution Approach 1:
The patent implements redundancy version cycling that periodically changes the redundancy version used in successive slots carrying UCI multiplexing. This periodic variation in redundancy versioning provides diverse coding perspectives that improve decoding reliability, while the cyclic nature ensures predictable resource usage and prevents unbounded overhead accumulation across the multiple slot transmission.
Data Source
AI summary
A method, a computer-readable medium, and an apparatus are provided for wireless communication. The apparatus multiplexes uplink control information (UCI) in a segment of a multiple slot physical uplink shared channel (PUSCH) transmission, the UCI multiplexing being based on at least one of a slot within a multiple slot transmission occasion, a segment of the multiple slot transmission occasion, or the multiple slot transmission occasion. The apparatus transmits the multiple slot PUSCH transmission with multiplexed UCI.