NTN PUCCH Repetition Mapping for Coverage and Resource Efficiency

The patent combines PUCCH repetition with msg3 repetition and PRACH preamble selection into a unified coverage enhancement mechanism. The gNB configures a set of preambles where each preamble corresponds to a specific repetition configuration, merging multiple repetition management functions into a single random access procedure. This reduces the complexity of managing separate PUCCH, msg3, and PRACH repetitions by handling them through a coordinated preamble-based approach.

The patent introduces a mapping relationship between preambles and repetition configurations as an intermediary mechanism. Instead of directly managing complex repetition parameters, the UE selects from a configured set of preambles, where each preamble acts as an intermediary that encodes specific repetition information. This intermediary mapping simplifies the UE's decision-making process and reduces the complexity of coordinating multiple repetition mechanisms.

The patent segments the random access preamble set into distinct groups, where each segment corresponds to a specific repetition configuration. The gNB configures a first set of preambles for PUCCH repetition and a second set for msg3 repetition, with overlapping preambles indicating both configurations are active. This segmentation allows efficient resource allocation by assigning specific preamble segments to specific repetition needs, reducing resource fragmentation through structured organization.

The patent implements multi-functionality by allowing certain preambles to serve multiple purposes simultaneously. A single preamble can indicate both msg3 repetition and PUCCH repetition, or it can be used for different repetition configurations depending on the gNB's configuration. This universal approach to preamble usage reduces resource fragmentation by maximizing the utility of each preamble, allowing fewer resources to support multiple coverage enhancement functions.

The patent implements dynamic configuration where the gNB can adaptively select which preambles to configure based on current network conditions and UE capabilities. The configuration is dynamic in that the gNB can update the mapping between preambles and repetition configurations without requiring UE reconfiguration. This dynamic approach maintains ease of operation by allowing the network to automatically adjust repetition settings based on real-time conditions rather than requiring manual UE configuration.

The patent enables self-service by allowing the UE to autonomously select from the configured preamble set based on its coverage needs and network conditions. The UE receives the preamble configuration from the gNB and independently determines which preamble to use for its random access procedure, without requiring network intervention in the selection process. This self-service capability maintains ease of operation by placing the decision-making authority with the UE while still benefiting from network-configured optimization.