PUCCH Cyclic Shift Adaptation for Intra-Slot Repetitive Transmission
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Solution Overview
Problem
In Rel-17 NR, unless the Physical Uplink Control Channel (PUCCH) is transmitted appropriately, the uplink control information (UCI) may be recognized improperly by the network.
Innovation Solution
A terminal that receives configuration information indicating the number of symbols greater than 2 for a PUCCH applies a cyclic shift based on uplink control information to the PUCCH.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the PUCCH is transmitted with more than two symbols, then the transmission duration is extended to improve reliability, but the cyclic shift application becomes complex and may cause improper recognition by the network
Solution Approach 1:
The patent applies parameter changes by modifying the cyclic shift value based on the PUCCH transmission duration. When the PUCCH is transmitted with more than two symbols, the cyclic shift amount is adjusted accordingly to maintain proper signal separation and recognition. This resolves the contradiction by adapting the cyclic shift parameter to the extended transmission duration, ensuring reliable recognition without excessive complexity.
2Ease of operation
If the cyclic shift is applied based on configuration information, then the PUCCH transmission is standardized and easier to implement, but the flexibility in handling different transmission scenarios is reduced
Solution Approach 1:
The patent implements dynamics by making the cyclic shift application adaptive rather than fixed. The cyclic shift is determined based on configuration information received from the network, allowing the system to dynamically adjust to different transmission scenarios. This resolves the contradiction by providing a standardized implementation process while maintaining adaptability through configuration-based parameter adjustment.
Data Source
AI summary
A terminal is disclosed that includes a receiver that receives configuration information configured for intra-slot repetitive transmission to physical uplink control channel (PUCCH) and a processor that applies, based on the configuration information, the intra-slot repetitive transmission to the PUCCH. The intra-slot repetitive transmission includes a first transmission and a second transmission, the second transmission being configured with different parameters from parameters of the first transmission, and the first transmission and the second transmission are non-contiguous. In other aspects, a radio communication method, a base station, and a system are also disclosed.