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GPR Hierarchical Synergistic Framework for Multi-Access MPQUIC in SAGINs

Hanjian Liu, Jinsong Gui

TL;DR

The GPR Hierarchical Synergistic Framework is proposed, representing the first joint optimization of multipath scheduling and congestion control for multi-access MPQUIC in SAGINs and introduces the GradNorm Probabilistic Self-Predictive module to forecast latent states and filter task-irrelevant information in high-dimensional, noisy observation spaces.

Abstract

The deployment of Multipath QUIC (MPQUIC) in Unmanned Aerial Vehicle (UAV)-assisted Space-Air-Ground Integrated Networks (SAGINs) is severely hampered by the out-of-order (OFO) packet delivery problem. Frequent stream handovers, high mobility, and massive multi-access contention in these networks introduce severe transport-layer challenges. Existing solutions typically isolate multipath scheduling from congestion control, which leads to suboptimal performance and transient congestion in highly dynamic environments. To overcome these limitations, this paper proposes the GPR Hierarchical Synergistic Framework, representing the first joint optimization of multipath scheduling and congestion control for multi-access MPQUIC in SAGINs. Our framework introduces the GradNorm Probabilistic Self-Predictive (GPASP) module to forecast latent states and filter task-irrelevant information in high-dimensional, noisy observation spaces. Furthermore, we develop a Proactive Handover-Aware Congestion Control (PHACC) algorithm that leverages neural network-driven decisions to proactively distinguish handover-induced packet losses from actual network congestion. To address decision-making lag caused by neural network inference latency, a Neural-network Preference Estimation (NNPE) algorithm is designed for highly efficient, real-time scheduling. Extensive ns-3 simulations demonstrate that the proposed framework significantly outperforms state-of-the-art baselines, achieving substantial goodput improvements and a marked reduction in OFO degrees.

GPR Hierarchical Synergistic Framework for Multi-Access MPQUIC in SAGINs

TL;DR

The GPR Hierarchical Synergistic Framework is proposed, representing the first joint optimization of multipath scheduling and congestion control for multi-access MPQUIC in SAGINs and introduces the GradNorm Probabilistic Self-Predictive module to forecast latent states and filter task-irrelevant information in high-dimensional, noisy observation spaces.

Abstract

The deployment of Multipath QUIC (MPQUIC) in Unmanned Aerial Vehicle (UAV)-assisted Space-Air-Ground Integrated Networks (SAGINs) is severely hampered by the out-of-order (OFO) packet delivery problem. Frequent stream handovers, high mobility, and massive multi-access contention in these networks introduce severe transport-layer challenges. Existing solutions typically isolate multipath scheduling from congestion control, which leads to suboptimal performance and transient congestion in highly dynamic environments. To overcome these limitations, this paper proposes the GPR Hierarchical Synergistic Framework, representing the first joint optimization of multipath scheduling and congestion control for multi-access MPQUIC in SAGINs. Our framework introduces the GradNorm Probabilistic Self-Predictive (GPASP) module to forecast latent states and filter task-irrelevant information in high-dimensional, noisy observation spaces. Furthermore, we develop a Proactive Handover-Aware Congestion Control (PHACC) algorithm that leverages neural network-driven decisions to proactively distinguish handover-induced packet losses from actual network congestion. To address decision-making lag caused by neural network inference latency, a Neural-network Preference Estimation (NNPE) algorithm is designed for highly efficient, real-time scheduling. Extensive ns-3 simulations demonstrate that the proposed framework significantly outperforms state-of-the-art baselines, achieving substantial goodput improvements and a marked reduction in OFO degrees.
Paper Structure (18 sections, 9 equations, 5 figures, 3 algorithms)

This paper contains 18 sections, 9 equations, 5 figures, 3 algorithms.

Table of Contents

  1. Introduction
  2. Related Work
  3. Multipath Transport in Non-Terrestrial Networks
  4. Multipath Scheduling and OFO Mitigation
  5. Intelligent Congestion Control
  6. DRL in Multi-Access SAGINs
  7. System Model
  8. Problem and MDP Formulation
  9. GPR Hierarchical Synergistic Framework
  10. State Encoder
  11. Decision Maker
  12. Reward Monitor
  13. Simulation Experiments
  14. Simulation Setting
  15. Multipath Scheduling Performance
  16. ...and 3 more sections

Figures (5)

  • Figure 1: MPQUIC in UAV-assisted SAGIN.
  • Figure 2: GPR Hierarchical Synergistic Framework.
  • Figure 3: Multipath scheduling performance comparison of different schemes.
  • Figure 4: Congestion control performance comparison of different schemes.
  • Figure 5: Comparison of NNPE ablation.