Hierarchical Packet Aggregation for Wireless Data Transmission

The patent segments packets into different aggregation groups based on destination address and traffic identifier. Packets with the same destination address and TID are aggregated together, while packets with different destinations are kept separate. This segmentation allows selective aggregation that reduces header overhead for packets that can be grouped, while maintaining separate processing paths for packets requiring lower delay, thus resolving the contradiction between resource efficiency and processing delay.

The patent applies local quality by assigning different transmission rates to different terminals based on their individual channel conditions. The base station evaluates the channel quality of each terminal and selects appropriate modulation and coding schemes (MCS) for each terminal's packet aggregation group. This allows each terminal to receive transmissions optimized for its specific channel conditions, improving resource utilization without requiring complex per-packet rate adaptation, thus resolving the contradiction between system complexity and resource waste.

The patent implements dynamic aggregation where the base station determines whether to aggregate MSDUs based on real-time conditions including the number of accumulated MSDUs, their destination addresses, TIDs, and channel conditions. Rather than using a fixed predetermined number for aggregation, the system dynamically adjusts aggregation decisions to balance aggregation efficiency with delay requirements. This dynamic approach allows the system to achieve good aggregation efficiency while maintaining reliability for real-time traffic by avoiding excessive buffering.

The patent segments the aggregated transmission into destination-specific groups within the same physical transmission. By organizing MPDUs into aggregation groups based on destination address and TID, the system allows terminals to efficiently identify and process only their intended packets. Terminals can quickly scan the aggregated transmission, identify packets destined for themselves based on MAC headers, and ignore other packets. This segmentation approach maximizes transmission opportunity utilization while minimizing resource waste at terminals that receive non-targeted packets.