Multi-TRP Feedback Transmission via Segmented PUCCH Resources
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Solution Overview
Problem
Current mobile communication networks face challenges in efficiently managing and optimizing communication protocols across multiple technologies and releases, particularly in 5G networks, leading to suboptimal performance and resource utilization due to outdated base station configurations and wireless device capabilities.
Innovation Solution
The implementation of advanced New Radio (NR) user plane and control plane protocol stacks, along with flexible bandwidth parts and carrier aggregation configurations, enables dynamic protocol management and resource allocation in 5G networks, allowing for seamless communication across various wireless devices and base stations, regardless of their capabilities and technology releases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple transmission reception points are used for feedback transmission, then network coverage and reliability are improved, but interference management complexity increases
Solution Approach 1:
The feedback transmission is segmented into multiple independent PUCCH resources associated with different TRPs. Each TRP receives feedback independently through dedicated resources, dividing the complex multi-TRP feedback problem into manageable single-TRP segments that can be handled separately
Solution Approach 2:
The network configures and manages PUCCH resource indicators as intermediaries that coordinate between UEs and multiple TRPs. These indicators serve as mediators that simplify the interaction complexity by providing standardized interfaces for feedback transmission across multiple TRPs
2Reliability
If PUCCH resources are configured for multiple TRPs, then feedback transmission reliability is improved, but uplink resource overhead increases
Solution Approach 1:
The configured PUCCH resources are designed to serve multiple functions: they can be used for feedback transmission to different TRPs, for different HARQ processes, and for different service types. This multi-functionality reduces the need for dedicated resources for each scenario, thereby reducing overall resource overhead
Solution Approach 2:
The system dynamically adjusts PUCCH resource parameters such as time-frequency locations, cyclic shifts, and orthogonal cover codes based on current network conditions, TRP configurations, and traffic demands. This parameter optimization ensures efficient resource utilization while maintaining reliability
3Adaptability or versatility
If dynamic protocol management is implemented, then network adaptability is improved, but system complexity increases
Solution Approach 1:
The protocol stack implements dynamic configuration where PUCCH resource parameters, TRP associations, and feedback modes can be adjusted in real-time based on network conditions, UE capabilities, and service requirements. This dynamic approach enables adaptability while managing complexity through standardized adjustment mechanisms
Solution Approach 2:
The system employs feedback mechanisms where UEs report their capabilities, channel conditions, and reception status to the network. The network uses this feedback to dynamically optimize protocol configurations and resource allocations, creating a closed-loop system that adapts automatically without requiring complex manual management
Data Source
AI summary
In some embodiments, a wireless device receives a plurality of downlink control information (DCIs) via a plurality of resource block (RB) sets of a bandwidth part of a cell. The plurality of DCIs indicate downlink radio resources. The wireless device receives a transport block via the downlink radio resources. Based on RB set indexes of the plurality of RB sets, the wireless device determines a DCI from the plurality of DCIs. Then, the wireless device transmits feedback information, for the transport block, via an uplink control channel resource determined based on the DCI.