Downlink OFDMA Unicast Conversion for Reliable WGB Multicast

The patent segments the original group-addressed broadcast packet into multiple separate unicast packets, each addressed to a specific WGB. This segmentation allows each packet to be treated as an individual transmission unit that can be acknowledged and retransmitted if necessary, thereby maintaining reliability while achieving broad coverage across multiple WGB-connected clients.

The patent introduces WGBs as intermediary devices in the transmission path. Instead of directly transmitting to end clients, the AP sends packets to WGBs which then relay them to connected clients. This intermediary structure enables the system to maintain broadcast-like coverage while using unicast protocols that support acknowledgment and retransmission mechanisms, thus improving reliability.

By segmenting the broadcast transmission into individual unicast packets sent to each WGB, the system maintains the speed advantage of direct addressing while enabling individual packet tracking. This allows the system to quickly identify and retransmit only the specific packets that were lost, rather than requiring retransmission of entire broadcast groups, thus reducing information loss while preserving delivery speed.

The patent implements feedback mechanisms where WGBs send acknowledgments to the AP confirming successful receipt of packets. This feedback loop enables the AP to quickly detect which packets were successfully delivered and which require retransmission, minimizing information loss while maintaining efficient data delivery speed through targeted retransmission rather than blanket retransmission.

The patent uses WGBs as intermediaries that absorb much of the processing complexity. The AP's role is simplified to creating and sending unicast packets to WGBs, while the WGBs handle the complexity of relaying packets to multiple end clients, managing their own acknowledgment processes, and coordinating retransmissions. This distribution of complexity across intermediary devices makes the overall system more manageable.

The patent merges multiple client address spaces through the WGB intermediary. Instead of the AP managing individual unicast transmissions to each end client (which would create high complexity), the AP merges all WGB-connected clients into a single transmission target (the WGB itself). The WGB then handles the distribution to multiple clients, combining multiple complex routing tasks into a single manageable operation at the AP level.