IEEE/ICACT20260302 Slide.03        [Big Slide]       [YouTube] Oral Presentation
However, implementing multipath transmission in WANs faces a critical challenge: Path Asymmetry. As shown in this diagram, when packets from the same flow traverse a Fast Path and a Slow Path due to finer-grained in-network multipath schedule and in-network Storage, they arrive at the receiver out of order. For protocols like TCP, out-of-order arrival is detrimental. It causes Low Goodput and Packet Reorder, leading to Inefficient allocation of network resources.

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