2023-03-08-兰德-通用指挥控制语言早期系统工程-通用指挥控制标准的性能影响（英）_129页_1mb

Summary

Background

Command and control (C2) of military capabilities requires linking, synchronizing, and directing multiple complex systems under tight time constraints. Failure can lead to severe tactical, operational, and strategic consequences. Achieving interoperability through C2 standards is challenging, as optimizing specific interfaces for their missions can make system-wide standardization complex, leading to the "n-squared interface problem."

What We Found

Insights from Ongoing DoD SoS Integration Efforts

• Interface Technical Performance: Implementation details (encoding, message format, processing complexity) significantly affect performance (latency, throughput), not just standard definition. Common formats include fixed-format binary (FFB), general-purpose binary, compressed/regular XML.

• Key Findings:

  • Network architecture (e.g., DDS decentralized vs. centralized) affects performance significantly even with the same standard.
  • CPU processing time for encoding/decoding is a major contributor to interface overhead.
  • Bandwidth-constrained links are highly sensitive to interface inefficiencies.

Insights from Mission Thread Analysis

1. Electronic Warfare (EW) Mission:

• CONCERTO system (very short timelines) is optimized for speed.
• Findings:
  • Modest interface overhead reduces jamming range significantly.
  • Without standardization, performance risks are high; UCCL must be very tailored or have minimal overhead.

2. Active Protection System (APS) Mission:

• MADIS/Mk1-Mk2 scenario (e.g., RPG threat).
• Findings:
  • Latency has minimal impact on Minimum Defeat Distance (MDD) in most cases.
  • In extreme scenarios (e.g., high-end threats), detailed engineering is needed. Standard interfaces like General-Purpose Binary (GPB) show minimal penalty, while XML variants perform poorly.

3. Ballistic Missile Defense (BMD) Mission:

• Medium-range ballistic missile tracking (1-minute boost phase).
• Findings:
  • Bandwidth-constrained links (e.g., SBIRS downlink) are vulnerable to inefficient UCCL implementations.
  • Small delays (seconds) are unlikely to affect overall success, but latency in critical phases can degrade track quality.
  • Discovery protocols in UCCL can significantly impact network congestion and throughput.

Conclusions and Implications

• Technical Performance: UCCL must balance interoperability and performance through parameter-based optimization (message size, processing complexity, CPU/memory constraints).
• Mission Risk: Trade-offs vary by mission. High-reliability missions (EW, APS under stress) are highly sensitive to overhead; lower-risk missions (BMD) may tolerate more overhead.
• Economic Considerations: Standards must deliver operational benefits to drivers like reduced training and vendor lock; otherwise, adoption risks failure.

Conclusions

Designers must carefully weigh trade-offs between interoperability and performance. Technical risks can be mitigated by focusing on non-time-critical domains, optimizing interface implementations, and creating performance-constrained versions. Critical steps in mission threads (bandwidth/large CPU load) must undergo rigorous analysis.