Interplanetary networks (IPNs) present unique challenges such as extreme delay, high loss, and frequent disruptions that severely degrade the performance of conventional transport protocols like Transmission Control Protocol (TCP) and Quick UDP Internet Connection (QUIC). To address these issues, we propose a secure transport acceleration strategy tailored for IPNs. This strategy is founded on our Non-Transparent Secure Proxy (NTSP) architecture, which enables connection splitting for end-to-end encrypted flows while preserving application layer security. Based on the NTSP, we design an IPN-aware transport policy that combines (i) a rate-based congestion control algorithm exploiting the pre-scheduled nature of deep-space links to achieve stable and efficient bandwidth utilization, and (ii) an adaptive packet-level forward error correction scheme to provide low-latency loss recovery without retransmissions. Furthermore, we introduce a theoretically grounded backpressure flow control mechanism, deriving an analytical model for optimal buffer sizing to mitigate rate mismatch and prevent bufferbloat. The strategy is implemented in a prototype system, PEPspace, and evaluated in representative Earth-Moon scenarios. Results show near-capacity and stable goodput and substantially improved delivery performance compared with TCP/QUIC variants and existing Performance Enhancing Proxies, while maintaining low latency and robust data delivery across intermittent links. The NTSP architecture is further discussed as a foundational framework for future unified IP/DTN architectures, bridging a key architectural gap in heterogeneous space networks.

翻译：星际网络（IPN）面临极端延迟、高丢包率和频繁中断等独特挑战，这些因素严重降低了传统传输协议（如传输控制协议（TCP）和快速UDP互联网连接（QUIC））的性能。为解决这些问题，我们提出了一种专为星际网络设计的、安全的传输加速策略。该策略基于我们提出的非透明安全代理（NTSP）架构，该架构能够在保持应用层安全的同时，对端到端加密流进行连接分割。基于NTSP，我们设计了一种IPN感知的传输策略，该策略结合了：（i）一种基于速率的拥塞控制算法，利用深空链路预调度的特性，实现稳定高效的带宽利用；（ii）一种自适应的包级前向纠错方案，无需重传即可提供低延迟的丢包恢复。此外，我们引入了一种基于理论推导的反压流控机制，通过推导最优缓冲区大小的分析模型，以缓解速率失配并防止缓冲区膨胀。该策略在一个原型系统PEPspace中实现，并在典型的地月场景中进行了评估。结果表明，与TCP/QUIC变体及现有的性能增强代理相比，该系统实现了接近容量且稳定的有效吞吐量，并显著提升了交付性能，同时在间歇性链路上保持了低延迟和稳健的数据交付。本文进一步讨论了NTSP架构作为未来统一IP/DTN架构的基础框架，以弥合异构空间网络中的关键架构鸿沟。