PUCCH Carrier Switching Joint Operations
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently operating PUCCH carrier switching in conjunction with other features like UCI multiplexing, simultaneous PUCCH/PUSCH transmission, and SPS HARQ-ACK deferral, leading to potential performance degradation.
Innovation Solution
The proposed solution involves configuring user equipment (UE) to perform PUCCH carrier switching within a PUCCH group, allowing for UCI multiplexing, and prioritizing operations such as SPS HARQ-ACK deferral, ensuring seamless integration with dynamic and semi-static PUCCH carrier switching methods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If PUCCH carrier switching is implemented to improve carrier aggregation performance, then system performance is improved, but integration complexity with existing features (UCI multiplexing, simultaneous PUCCH/PUSCH transmission, SPS HARQ-ACK deferral) increases
Solution Approach 1:
The patent implements dynamic PUCCH carrier switching where the network can dynamically indicate which PUCCH carrier should be used for UCI transmission through DCI signaling. This allows the system to adaptively switch between PUCCH carriers based on current transmission conditions, resolving the contradiction by providing flexible, condition-based carrier selection that improves performance without requiring permanent complex integration with all existing features.
Solution Approach 2:
The patent changes the operational parameters of PUCCH transmission by introducing carrier switching capability, where different PUCCH carriers can be selected based on transmission requirements. This parameter change enables improved carrier aggregation performance while managing integration complexity through standardized switching mechanisms that work with existing UCI multiplexing and simultaneous transmission features.
2Adaptability or versatility
If dynamic PUCCH carrier switching is implemented with network indication in DCI, then carrier switching flexibility is improved, but signaling overhead increases
Solution Approach 1:
The patent makes the PUCCH carrier indication field in DCI format 1_1 multi-functional by reusing existing DCI structure and fields. The same DCI format that carries scheduling information also carries the PUCCH carrier indication, eliminating the need for separate signaling messages and reducing overall signaling overhead while maintaining flexible carrier switching capability.
3Device complexity
If semi-static PUCCH carrier switching is implemented with configured timing patterns, then implementation complexity is reduced, but switching flexibility is limited
Solution Approach 1:
The patent implements semi-static PUCCH carrier switching by pre-configuring timing patterns and carrier associations through RRC signaling before actual transmission occurs. This preliminary configuration reduces implementation complexity during runtime while still providing adequate switching flexibility for different transmission scenarios through the pre-defined patterns.
Data Source
AI summary
There is provided a methods for operating a network node. In some embodiments of operating a network node includes configuring a UE with a PUCCH group including a plurality of cells, and configuring the UE to switch a cell on which UCI for a cell of the PUCCH group is transmitted. In some embodiments the methods include joint operations of PUCCH carrier switching and existing features/procedures such as UCI multiplexing, simultaneous PUCCH/PUSCH transmission on multiple carriers, and SPS HARQ-ACK deferral. A network node, a method for a user equipment and a user equipment is also provided.