HARQ Feedback Timing in CoMP Wireless Systems

The patent segments the HARQ feedback transmission by dividing overlapping PDSCH reception occasions into distinct groups based on transmission node identification. Each segment is handled with specific feedback timing rules, allowing the system to manage multiple feedback instances without overwhelming complexity. The segmentation is achieved through identifying whether PDSCHs are from the same or different transmission nodes and applying different feedback timing indications accordingly.

The patent introduces dynamic feedback timing indication through DCI formats, where the feedback timing can be adjusted based on the specific scenario of overlapping PDSCH receptions. The feedback timing is not fixed but dynamically selected from multiple possible values (K1, K2, etc.) based on the transmission node configuration and overlap conditions, allowing the system to adapt to varying complexity levels in different scenarios.

The patent applies local quality by providing enhanced feedback timing information only where needed - specifically when PDSCH receptions from different transmission nodes overlap. In non-overlapping scenarios, the standard feedback timing indication is sufficient. The additional timing precision is locally applied to the control information fields in DCI formats only for CoMP scenarios requiring it, rather than universally increasing overhead for all transmissions.

The patent designs the feedback timing indication mechanism to serve multiple functions: it works for both single-node and multi-node transmission scenarios, and can indicate different timing values (K1, K2, etc.) based on the scenario. The same DCI format structure is used universally, but the interpretation and specific timing values adapt to whether the scenario involves overlapping CoMP transmissions or not, reducing the need for separate specialized control structures.