Executive Summary
This thesis simulates and analyzes an underwater acoustic Local Area Network (LAN) concept called "Seastar," which uses high-frequency acoustic modems to send data from distributed sensor nodes to a central node. It evaluates four network protocols (TDMA polling and token ring, with and without Selective Automatic Repeat Request) under varying noise conditions and node layouts. The study recommends an adaptive protocol selection based on noise levels and performance priorities, with token ring with SRQ preferred in low noise and polling with SRQ in high noise.
Why It Matters
This document is crucial for defense analysts as it details the development and optimization of underwater acoustic communication networks, which are vital for naval intelligence, surveillance, and reconnaissance (ISR) operations and anti-submarine warfare (ASW). Understanding these network protocols and their performance under varying conditions directly impacts the effectiveness of future undersea sensor deployments.
Key Takeaways
- In low-noise underwater environments, the token ring with SRQ protocol offers the highest data throughput with minimal packet loss for acoustic LANs.
- Under high-noise conditions, the polling with SRQ protocol is more advantageous for maintaining communication efficiency in underwater acoustic networks.
- An adaptive switching mechanism for network protocols, based on prevailing noise conditions and critical performance metrics, is recommended for optimal underwater acoustic LAN operation.
Strategic Relevance
The development and optimization of underwater acoustic local area networks (LANs) are strategically important for enhancing maritime domain awareness, improving anti-submarine warfare capabilities, and enabling distributed undersea sensor networks. Efficient and reliable underwater communication is critical for naval operations, intelligence gathering, and maintaining a technological edge in contested maritime environments.