NB-IoT Data Scheduling With Flexible HARQ Delays

The patent transforms the fixed delay mechanism into a dynamic one by introducing a first delay parameter that can be flexibly configured. The start time of downlink channels is determined by the end time of DCI plus the first delay, allowing the scheduling timeline to adapt to different scenarios. This dynamic approach enables one DCI to schedule multiple TBs with flexible time spacing, resolving the contradiction between flexibility and complexity.

The patent changes the scheduling parameters from fixed values to configurable parameters. By introducing configurable first delay and second delay parameters, the system can adjust timing relationships dynamically. This parameter change allows the same DCI to schedule multiple TBs with different time intervals, improving resource allocation flexibility without fundamentally changing the scheduling mechanism structure.

The patent makes the transmission duration dynamic by allowing flexible configuration of delay parameters. The transmission duration is no longer constrained by fixed delay differences but can be adjusted based on the configured first delay and second delay values, enabling longer transmission durations when needed while maintaining flexibility for shorter durations in other scenarios.

The patent performs preliminary configuration of delay parameters to enable flexible transmission duration. By pre-configuring the first delay and second delay values, the system prepares the timing relationships in advance, allowing the transmission duration to be determined by these pre-set parameters rather than being limited by fixed delay structures.