PUCCH Carrier Switching for Uplink Resource Conflict Avoidance
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Solution Overview
Problem
Existing communication systems face challenges in performing Physical Uplink Control Channel (PUCCH) transmission due to limited uplink resources and resource conflicts, leading to transmission delays and affecting Ultra-Reliable and Low Latency Communication (URLLC) performance.
Innovation Solution
A carrier switching method is implemented where PUCCHs are transmitted on a second carrier after switching, following specific rules to ensure non-overlapping in the time domain, including UCI multiplexing, time division multiplexing, and resource selection to optimize PUCCH transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If PUCCH transmission is performed on the original carrier with limited uplink resources, then resource utilization is optimized, but transmission delays occur when resource conflicts arise
Solution Approach 1:
The patent implements dynamic carrier switching for PUCCH transmission by determining whether to switch carriers based on resource availability and conflict detection. The terminal device can dynamically select between original carrier and target carrier for PUCCH transmission, optimizing transmission timing and eliminating delays caused by resource conflicts on the original carrier.
Solution Approach 2:
The patent introduces a target carrier as an intermediary resource for PUCCH transmission. When resource conflicts are detected on the original carrier, the terminal switches to the target carrier which has available resources, thereby mediating the resource conflict and ensuring timely transmission without waiting for original carrier resources to become available.
2Productivity
If multiple PUCCHs are multiplexed on a single carrier, then resource utilization improves, but resource conflicts and transmission delays increase
Solution Approach 1:
The patent segments PUCCH transmission across multiple carriers (original carrier and target carrier) rather than concentrating all PUCCH transmissions on a single carrier. By dividing the transmission load across different carriers, the system maintains high resource utilization while avoiding resource conflicts that would compromise transmission reliability.
Solution Approach 2:
The patent combines PUCCH transmission resources from multiple carriers to handle multiple PUCCH transmissions. By merging the capacity of the original carrier and target carrier, the system achieves both high resource utilization and transmission reliability, as PUCCHs can be distributed across carriers with available resources.
Data Source
AI summary
A carrier switching transmission method and apparatus, and a terminal and a network-side device are provided. The method includes: when a plurality of physical uplink control channels PUCCHs transmitted on a first carrier needs to do carrier switching and all of the plurality of PUCCHs are determined to be transmitted in a first time unit on a second carrier after the carrier switching, sending by a terminal one or more PUCCHs in the first time unit on the second carrier according to a first rule after the carrier switching, wherein the plurality of PUCCHs does not overlap in a time domain on the first carrier. PUCCH transmission may be implemented through PUCCH carrier switching.