PUCCH Repetition Control via DCI and Higher Layer Parameters
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Solution Overview
Problem
Current radio communication systems, particularly in the context of LTE and New Radio (NR) standards, face inefficiencies in managing the transmission and reception of PUCCH (Physical Uplink Control Channel) messages, which affect overall communication performance.
Innovation Solution
A terminal apparatus and communication method that utilize a reception circuitry to receive PDCCH including a DCI format, and a transmission circuitry to transmit PUCCH, with the number of repetitions determined by higher layer parameters such as NrofSlots and PUCCH-RepetitionFactor field within the DCI format, optimizing PUCCH transmission based on these parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the number of PUCCH repetitions is fixed by higher layer parameter NrofSlots, then configuration simplicity is maintained, but transmission reliability cannot be dynamically adjusted
Solution Approach 1:
The patent introduces dynamic switching capability for PUCCH repetition determination between two modes: higher layer parameter-based (NrofSlots) and DCI format-based (PUCCH-RepetitionFactor field). This allows the system to adaptively select the appropriate determination method based on current transmission requirements, thereby improving reliability without permanently increasing complexity.
Solution Approach 2:
The patent changes the parameter determination mechanism by introducing a new parameter source (DCI format PUCCH-RepetitionFactor field) that can override or supplement the higher layer parameter NrofSlots. This parameter flexibility enables dynamic adjustment of repetition count to match channel conditions and service requirements.
2Productivity
If PUCCH repetition count is determined by DCI format PUCCH-RepetitionFactor field, then dynamic transmission optimization is achieved, but processing complexity increases
Solution Approach 1:
The patent implements dynamic determination of PUCCH repetition count through the DCI format PUCCH-RepetitionFactor field, allowing real-time optimization of transmission parameters based on current channel conditions and traffic requirements. This dynamic approach improves communication efficiency by adapting to varying conditions.
Solution Approach 2:
The patent prepares both determination mechanisms (higher layer parameter and DCI format field) in advance, with clear priority rules established beforehand. This preliminary setup allows the terminal to efficiently process PUCCH repetitions without complex real-time decision-making, reducing processing overhead while maintaining dynamic optimization capability.
3Adaptability or versatility
If higher layer parameter NrofSlots is used for PUCCH repetition, then configuration management is simplified, but transmission adaptability is reduced
Solution Approach 1:
The patent makes the parameter management system multi-functional by supporting two determination methods: higher layer parameter NrofSlots for simple configurations and DCI format PUCCH-RepetitionFactor for dynamic scenarios. The terminal can universally handle both methods based on capability flags, enhancing adaptability without proportionally increasing management complexity.
Solution Approach 2:
The patent introduces dynamic switching capability that allows the system to transition between static (higher layer parameter) and dynamic (DCI format field) determination modes based on service requirements and channel conditions, thereby improving adaptability while managing complexity through conditional activation.
Data Source
AI summary
A terminal apparatus includes a reception circuitry that receives a PDCCH including a DCI format; and a transmission circuitry that transmits a PUCCH. The DCI format indicates transmission of the PUCCH. In a case that a first higher layer parameter NrofSlots indicating the number of repetitions is configured for a PUCCH format corresponding to the transmission of the PUCCH, the number of repetitions of the transmission of the PUCCH is determined based on the first higher layer parameter. In a case that the number of repetitions per transmission of the PUCCH is indicated to be valid for the transmission of the PUCCH based on a second higher layer parameter, the number of repetitions of the transmission of the PUCCH is determined based on a value set in a PUCCH-RepetitionFactor field for the transmission of the PUCCH, included in the DCI format.