UPF Network Coding With FEC Outer Coding for Low-Latency XR

The patent applies Forward Error Correction (FEC) encoding at the UPF before data transmission, pre-calculating and attaching parity bits to the data packets. This preliminary action enables the receiving device to correct errors autonomously upon receipt without waiting for retransmission cycles, thereby resolving the contradiction between reliability improvement and latency reduction.

The FEC encoding is performed in advance at the UPF, and the receiving device uses the pre-encoded parity information to immediately correct errors. This eliminates the need for power-intensive retransmission protocols and repeated transmission cycles, thereby reducing overall power consumption while maintaining reliability.

The patent introduces FEC outer coding as an intermediary layer at the UPF, positioned between the core network and the wireless access network. This intermediary performs error correction encoding before data enters the wireless transmission pipeline, enabling latency reduction without significantly increasing the complexity of end-user devices, as the encoding/decoding is primarily handled at network infrastructure points.