Uplink Control Channel Hopping Timing Alignment
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Solution Overview
Problem
In future radio communication systems, the multiplexing of uplink control channels with different durations and starting symbols in the same slot leads to inefficient use of radio resources due to mismatched hopping boundaries, resulting in unallocated time and frequency resources.
Innovation Solution
A user terminal controls the hopping timing of frequency resources for uplink control channels based on whether the starting symbol index is even or odd and the channel duration, using specific mathematical expressions or tables to align hopping boundaries among channels with the same starting symbol but different durations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If frequency hopping is performed on uplink control channels with different durations and starting symbols, then the channels can be multiplexed in the same slot, but hopping boundaries become mismatched causing resource waste
Solution Approach 1:
The patent applies parameter changes by modifying the hopping timing parameter based on the starting symbol index. Specifically, when the starting symbol index is even, hopping occurs at symbol 2; when odd, hopping occurs at symbol 3. This parameter adjustment aligns hopping boundaries across channels with different durations, eliminating resource gaps and improving utilization efficiency while maintaining multiplexing capability
2Productivity
If uplink control channels with different durations are multiplexed in the same slot, then resource utilization improves, but hopping boundaries become different causing unallocated resources
Solution Approach 1:
The patent changes the hopping timing parameter based on the starting symbol index parity. For even starting symbols, hopping occurs at symbol 2; for odd starting symbols, hopping occurs at symbol 3. This ensures that despite different channel durations, all channels complete their hopping at the same time, eliminating unallocated time resources and improving overall productivity
3Loss of energy
If frequency hopping timing is adjusted based on starting symbol index, then hopping boundaries align improving resource efficiency, but control complexity increases
Solution Approach 1:
The patent applies local quality by providing different hopping timing values based on the local property of the starting symbol index (even or odd). This localized differentiation ensures that each channel's hopping timing is optimized for its specific starting position, achieving boundary alignment without requiring complex global coordination mechanisms
Data Source
AI summary
To improve utilization efficiency of radio resources in a case that uplink control channels of a plurality of user terminals having different durations and/or starting symbols are multiplexed in the same slot. A user terminal of the present invention includes a transmitting section that transmits uplink control information (UCI) by using an uplink control channel, and a control section that controls a hopping timing of a frequency resource to which the uplink control channel is mapped, based on whether an index of a starting symbol of the uplink control channel is an even number or an odd number and a duration of the uplink control channel.