Reliable, Efficient Large-File Delivery over Lossy, Unidirectional Links

Many mission-specific network architectures inhibit or delay bidirectional connectivity among hosts. Such constraints are common in Delay-Tolerant Networks, cyber-physical systems, and secured networks, where crucial network protocols - principally the Transmission Control Protocol (TCP) - cannot be used. In this paper, we present a process based upon Low-Density Parity Check (LDPC) codes for efficiently and reliably bridging TCP connections across network segments whose architecture enforces one-way data flows and prevents Automatic Repeat Request (ARQ) prompts. We demonstrate its performance, measured by the time required to complete a file transaction, as comparable to scp (Secure Copy), a common file transfer utility.