TDD Frame Structure Design for HARQ-ACK Feedback Delay Reduction

The patent introduces a dynamic switching mechanism between different uplink-downlink configurations, allowing the system to adaptively select configuration types (first type with smaller k values, second type with larger k values) based on current service requirements. This dynamic approach enables the system to use smaller k values when low delay is needed, thereby reducing service delay while maintaining the ability to use larger k values when higher throughput is required.

The patent changes the parameter k values by introducing two distinct types of uplink-downlink configurations with different k value sets. The first type uses smaller k values (e.g., k=4,5,6) to reduce service delay, while the second type uses larger k values to accommodate specific TDD frame structure requirements. This parameter variation allows the system to optimize HARQ-ACK feedback timing according to different service scenarios.

The patent segments the HARQ-ACK feedback mechanism into two distinct configuration types. The first type segments feedback into more frequent, smaller batches with smaller k values, reducing the number of subframes that need to be bundled together. The second type handles cases where larger bundling is necessary. This segmentation approach simplifies the feedback mechanism by avoiding the need to handle all cases with a single complex bundling strategy.

The patent implements dynamic switching between different HARQ-ACK feedback configurations based on service requirements. When low delay is required, the system dynamically selects the first type of configuration with smaller k values and reduced subframe bundling. When higher throughput is needed, it switches to the second type. This dynamic adaptation simplifies the overall mechanism by allowing the system to use simpler feedback strategies when possible.

The patent creates a universal framework that encompasses both the first type of uplink-downlink configuration (optimized for low delay with smaller k values) and the second type (optimized for specific TDD requirements with larger k values). This multi-functional configuration system allows the network to select the appropriate configuration type based on service requirements, providing both wide adaptability and optimized performance for different scenarios.

The patent introduces dynamic configuration switching that allows the system to transition between different uplink-downlink configuration types. When services requiring low delay arrive, the system dynamically selects configurations from the first type with smaller k values. When other services require specific TDD patterns, it switches to the second type. This dynamic capability maintains comprehensive configuration coverage while enabling optimization for specific service types.