Sidelink Carrier Aggregation RLF Detection Using Per-Carrier DTX Counters

The patent segments the RLF determination process by introducing separate DTX counters for different carrier types (intra-carrier and inter-carrier HARQ feedback). This segmentation allows independent monitoring and evaluation of each carrier's transmission status, enabling more reliable RLF detection in complex CA scenarios while maintaining manageable complexity through modular counter management.

The patent changes the parameter structure by introducing multiple DTX counters with different evaluation thresholds and timing requirements. Specifically, it uses a first DTX counter for intra-carrier HARQ feedback with a first threshold and timing, and a second DTX counter for inter-carrier HARQ feedback with a second threshold and timing. This parameter differentiation enables reliable RLF detection across diverse carrier configurations.

The patent segments link quality detection into separate DTX counter mechanisms for each carrier type. By maintaining distinct counters for intra-carrier and inter-carrier HARQ feedback scenarios, the system can independently monitor and evaluate link quality on each carrier without interference from cross-carrier complexities, thus enabling effective productivity improvement through CA.

The patent introduces differentiated parameters including separate DTX counters, thresholds, and timing requirements for different carrier configurations. This parameter differentiation simplifies link quality detection by providing specific measurement criteria for each carrier type, making it easier to detect and respond to link failures while maintaining high data transmission rates through multi-carrier operation.

The patent applies partial monitoring by maintaining DTX counters only for active carriers involved in data transmission. Rather than continuously monitoring all possible carriers, the system selectively maintains counters for carriers that are currently in use, thereby improving carrier reselection reliability for active links while reducing energy consumption by avoiding unnecessary monitoring of inactive carriers.

The patent introduces configurable parameters including thresholds and timing requirements that allow the system to adapt monitoring intensity to actual transmission needs. By adjusting these parameters dynamically based on carrier activity and transmission importance, the system achieves reliable carrier reselection while optimizing energy consumption through adaptive rather than continuous monitoring.