Local Packet Recovery in Overlay Networks

The patent applies preliminary action by implementing a local recovery mechanism at intermediate nodes that can recover lost packets before they reach the original transmit end. When a node detects packet loss, it immediately recovers and re-sends the lost packets using locally cached data, eliminating the need to wait for feedback to the original transmitter. This preliminary recovery action at the network edge resolves the contradiction by maintaining reliability through loss detection while dramatically reducing transmission delay.

The patent applies segmentation by dividing the packet recovery function from the original transmit end and distributing it to multiple intermediate nodes along the transmission path. Each node independently performs local recovery operations when packet loss is detected, rather than relying on centralized re-transmission from the source. This segmentation enables parallel recovery operations and eliminates the efficiency loss associated with waiting for feedback loops, as each node autonomously handles recovery without blocking the overall transmission flow.

The patent applies local quality by adding identification information selectively only to packets that have been recovered through the local recovery mechanism, rather than adding information to all packets. The identification field serves as a localized marker that enables the terminal to distinguish between originally transmitted packets and locally recovered packets, providing necessary network status information without universally increasing packet overhead. This selective approach minimizes the volume impact while maintaining the information quality needed for accurate network status determination.