Bitmap-Free Block ACK for Multi-TID A-MPDU Reception

The patent extracts the essential reception status information by removing the bitmap field from the BA frame. Instead of including detailed per-MPDU reception status in the bitmap, the invention uses a simplified approach where the presence or absence of the bitmap is controlled by a flag field, allowing the receiver to understand reception status without the bandwidth overhead of a full bitmap.

The patent changes the parameter representation by using a flag field to indicate whether the bitmap is present, rather than always including the bitmap. This allows dynamic adjustment of the frame structure based on transmission needs, improving bandwidth efficiency when full reception status detail is not required while maintaining information completeness when needed.

The patent segments the BA frame into optional components, where the bitmap and start sequence control fields are included only when necessary. The flag field enables selective inclusion of these components, allowing the frame structure to be simplified when detailed reception status is not needed, thereby reducing processing complexity at both transmitter and receiver.

The patent applies partial action by including only the necessary fields in the BA frame. Instead of always providing complete reception status information through bitmaps and start sequence control fields, the invention provides partial information (just the flag indicating bitmap presence) when full detail is not required, reducing frame complexity while maintaining sufficient functionality.