PUCCH Configuration for Multi-Cell Feedback Load Reduction
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Solution Overview
Problem
In wireless communications, the existing method for configuring physical uplink control channels (PUCCH) leads to a high load on cells when handling uplink feedback information from multiple user equipment (UE) cells, as each cell typically configures a separate PUCCH, resulting in inefficient resource utilization.
Innovation Solution
A method and apparatus that allow multiple cells of a UE to share PUCCHs by establishing correspondences between cells, enabling uplink feedback information to be borne by multiple PUCCHs, thereby reducing the load on individual cells, and dynamically adjusting these correspondences through activation and deactivation based on correspondence indication information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate PUCCH is configured for each cell to bear uplink feedback information, then the reliability of feedback transmission is improved, but the load on each cell increases and resource utilization becomes inefficient
Solution Approach 1:
The patent merges multiple PUCCH channels by establishing correspondences between cells. Instead of each cell having a dedicated PUCCH, multiple cells share common PUCCH resources through correspondence relationships, allowing feedback information from multiple cells to be transmitted through shared PUCCH configurations, thereby reducing per-cell load while maintaining feedback reliability
Solution Approach 2:
The patent implements multi-functionality by enabling a single PUCCH configuration to serve multiple cells simultaneously. Through correspondence indication information, a PUCCH can bear feedback information from multiple cells, making the PUCCH resource universal rather than cell-specific, which improves resource utilization efficiency
2Reliability
If multiple cells are configured with separate PUCCHs, then feedback information can be transmitted reliably, but the device complexity increases
Solution Approach 1:
The patent reduces device complexity by merging multiple PUCCH configurations into shared PUCCH resources. Instead of managing separate PUCCHs for each cell, the system uses correspondence relationships to map multiple cells to common PUCCH configurations, simplifying the overall PUCCH management structure while maintaining reliable feedback transmission
Solution Approach 2:
The patent introduces correspondence indication information as an intermediary mechanism that mediates between multiple cells and shared PUCCH resources. This intermediary structure enables the system to manage complexity by providing a clear mapping relationship without requiring direct complex coordination between all cells and PUCCH resources
3Productivity
If a single PUCCH is configured for multiple cells, then resource utilization efficiency is improved, but the load on the PUCCH increases
Solution Approach 1:
The patent applies segmentation by dividing the PUCCH load across multiple time slots and frequency resources. Instead of concentrating all feedback information from multiple cells into a single PUCCH transmission, the system segments the feedback data and transmits it in multiple stages using different PUCCH configurations, thereby reducing the instantaneous load on any single PUCCH while maintaining high resource utilization efficiency
Data Source
AI summary
Embodiments of the present invention provide a Physical Uplink Control Channel (PUCCH) configuration method and apparatus. A user equipment (UE) receives correspondence indication information sent by a base station. Additionally, the UE determines, according to a currently-used correspondence, a PUCCH used to send uplink feedback information of a second cell.