PUCCH Repetition Scheme Selection for Wireless Terminal
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Solution Overview
Problem
In future radio communication systems, such as NR, the method for determining whether to transmit PUCCH repetition for each slot or sub-slot is unclear, leading to unsuitable PUCCH repetition and potential deterioration in communication quality and throughput.
Innovation Solution
A terminal is equipped with a control section that determines, based on RRC information, UCI type, downlink control information, and MAC control elements, the scheme for transmitting PUCCH repetitions over multiple slots or sub-slots, and a transmitting section that implements this scheme.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If PUCCH repetition is transmitted over multiple slots, then reliability is improved, but transmission flexibility and latency are worsened
Solution Approach 1:
The patent divides the PUCCH repetition transmission into two distinct schemes: slot-based repetition and sub-slot-based repetition. This segmentation allows the system to choose appropriate transmission granularity based on specific requirements, thereby maintaining reliability while improving flexibility and latency performance.
Solution Approach 2:
The patent introduces dynamic switching capability between slot-based and sub-slot-based repetition schemes through RRC configuration and MAC CE activation. This dynamic adaptation enables the system to optimize transmission parameters in real-time based on channel conditions and traffic requirements, resolving the contradiction between reliability and flexibility.
2Reliability
If PUCCH repetition is transmitted over multiple slots, then reliability is improved, but transmission latency is worsened
Solution Approach 1:
By segmenting the repetition transmission into slot-level and sub-slot-level operations, the patent enables finer control over transmission timing. Sub-slot-based repetition can achieve faster transmission with reduced latency while maintaining reliability through multiple repetitions, directly addressing the latency issue.
Solution Approach 2:
The patent changes the time granularity parameter from slot-level to sub-slot-level for the second scheme, which directly reduces transmission latency while maintaining the reliability benefits of repeated transmission through increased transmission frequency.
3Reliability
If PUCCH repetition transmission method is clarified, then communication quality is improved, but system complexity increases
Solution Approach 1:
The patent uses RRC information elements and MAC control elements as intermediary layers to manage the complexity of PUCCH repetition configuration. These intermediaries abstract the complex transmission parameters from the physical layer, simplifying control while maintaining communication quality.
Solution Approach 2:
The patent creates a universal configuration framework where RRC parameters and MAC CE commands can control both slot-based and sub-slot-based repetition schemes. This multi-functional approach reduces overall system complexity by using a unified control mechanism for different transmission modes.
Data Source
AI summary
A terminal according to an aspect of the present disclosure includes: a control section that determines, based on at least one of a radio resource control (RRC) information element (IE), a type of uplink control information (UCI) carried by a physical uplink control channel (PUCCH), downlink control information, and a medium access control (MAC) control element (CE), one scheme of a first scheme for respectively transmitting a plurality of repetitions of the PUCCH over a plurality of slots and a second scheme for respectively transmitting a plurality of repetitions of the PUCCH over a plurality of sub-slots; and a transmitting section that transmits the plurality of repetitions according to the scheme. According to the aspect of the present disclosure, it is possible to realize suitable PUCCH repeated transmission.