Dynamic Block Acknowledgement Bitmap Length in WiFi BA Frames

The patent applies the dynamics principle by transforming the fixed 64-bit BA Bitmap field into a dynamic structure where the bitmap length can be adjusted according to the actual number of MPDUs received. The receiving device calculates the required bitmap length based on the sequence numbers of received MPDUs and sets the bitmap length indicator accordingly, allowing the BA frame to adapt its size to match the actual data transmission needs rather than always using the maximum 64-bit length

The patent implements parameter changes by modifying the bitmap length parameter of the BA Bitmap field. Instead of using the fixed 64-bit length mandated by the standard, the receiving device changes the bitmap length parameter dynamically based on the actual number of MPDUs that need acknowledgment. This is achieved by calculating the difference between the largest and smallest sequence numbers of received MPDUs and setting the bitmap length indicator to reflect this reduced size, thereby reducing BA frame overhead while maintaining standard compliance

The patent introduces an intermediary element - the bitmap length indicator - that mediates between the fixed standard requirement and the dynamic optimization need. This indicator field acts as a bridge, carrying the information about the actual bitmap length in a standardized manner that both transmitting and receiving devices can understand and process, thereby simplifying the complexity management while enabling dynamic adaptation

The patent applies segmentation by dividing the BA frame into distinct functional components: the standard BA frame structure and the optional bitmap length indicator. This segmentation allows the system to maintain the core standardized elements while adding only the necessary minimal extension (the indicator) to enable dynamic optimization, rather than fundamentally restructuring the entire BA frame format