Multi-Subframe Uplink Scheduling HARQ Timing Control

The patent segments the HARQ control mechanism by introducing separate timing parameters for different subframe types. Downlink subframes have one timing relationship (k1) for scheduling uplink subframes, while uplink subframes have another timing relationship (k2) for HARQ feedback. This segmentation allows multi-subframe scheduling to operate efficiently without compromising synchronous HARQ control, as each segment can be independently managed according to its specific timing requirements.

The patent resolves the timing determination complexity by introducing distinct parameter sets for different scheduling scenarios. When a downlink subframe schedules multiple uplink subframes, each uplink subframe is assigned a specific timing parameter (k1 or k2) based on its type and position. This parameter differentiation simplifies the detection and measurement of timing positions, as the UE can directly apply the appropriate parameter without complex calculations, thereby reducing scheduling overhead while maintaining precise timing control.

The patent enables the PHICH to serve multiple functions by allowing it to carry HARQ-ACK feedback for multiple uplink subframes simultaneously. The PHICH resource allocation is designed to be universal, supporting both single-subframe and multi-subframe scheduling scenarios. This multi-functionality is achieved through configurable timing parameters that allow the PHICH to be associated with different uplink subframes based on the scheduling mode, thereby improving feedback efficiency without significantly increasing resource allocation complexity.