PUCCH SCell Configuration for Multi-TRP HARQ Feedback
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Solution Overview
Problem
Current wireless communication networks face challenges in efficiently managing traffic load and packet sizes across multiple technologies and releases, leading to suboptimal performance in 5G networks, particularly in handling diverse wireless devices and base stations with varying capabilities.
Innovation Solution
The implementation of a flexible and configurable architecture that selectively applies New Radio (NR) protocols based on criteria such as wireless device or network node configurations, traffic load, and packet sizes, allowing for dynamic bandwidth adaptation and carrier aggregation to optimize communication between wireless devices and base stations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single PUCCH SCell is configured for HARQ-ACK feedback, then the configuration is simple, but it cannot support multi-TRP scenarios where different TRPs require different PUCCH SCells
Solution Approach 1:
The patent implements dynamic selection of PUCCH SCell based on the TRP transmitting the downlink data. The network can dynamically indicate which PUCCH SCell should be used for HARQ-ACK feedback through DCI formatting, allowing the system to adapt to different TRP scenarios while maintaining a relatively simple configuration structure. This resolves the contradiction by making the system dynamic rather than static, enabling multi-TRP support without permanently increasing configuration complexity.
Solution Approach 2:
The patent changes the parameter configuration by introducing multiple PUCCH SCell configurations (first PUCCH SCell and second PUCCH SCell) with different associations to TRPs. By configuring multiple SCells with different properties (e.g., different frequency bands, different beam directions) and selectively activating them based on TRP identification, the system achieves adaptability for multi-TRP scenarios while managing complexity through structured parameter organization.
2Productivity
If NR protocols are applied universally, then 5G performance is optimized, but compatibility with legacy devices and networks is reduced
Solution Approach 1:
The patent applies different protocol configurations to different locations or contexts within the network. Specifically, it allows NR protocols to be applied selectively based on device capability, network configuration, and service requirements rather than universally. This enables high network efficiency for 5G-capable devices while maintaining compatibility with legacy devices through appropriate protocol selection or fallback mechanisms.
Solution Approach 2:
The system dynamically selects which protocol version to apply based on device capabilities, network conditions, and service requirements. This dynamic adaptation allows the network to optimize for NR protocols when possible while automatically falling back to or coexisting with legacy protocols when needed, thereby maintaining both high productivity for 5G devices and broad adaptability for diverse technology environments.
Data Source
AI summary
A wireless device receives one or more radio resource control messages. The one or more radio resource control messages indicating: a first control resource set (coreset) group; a second coreset group; a first physical uplink control channel (PUCCH) cell associated with a first index indicating the first coreset group; and a second PUCCH cell associated with a second index indicating the second coreset group. one or more transport blocks are received. A determination is made of a PUCCH cell for transmitting hybrid automatic repeat request (HARQ) feedback of the one or more transport blocks. The determining comprises: determining the first PUCCH cell in response to the one or more transport blocks being scheduled via the first coreset group; and determining the second PUCCH cell in response to the one or more transport blocks being scheduled via the second coreset group. The HARQ feedback is transmitted via the determined PUCCH cell.