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Underwater Acoustic Networks (UAN)
Overview:
NetSim’s Underwater acoustic networks (UAN or sometimes termed UWAN) library enables users to design, simulate and analyze performance of underwater networks that use acoustic communication.
Features
- Architecture and interlinkage with other NetSim components
- NetSim Component # 12 will be Underwater Acoustic Networks
- It will be available only with standard and pro versions
- It requires Component # 2 (Legacy Networks) to run
- It can be interface with NetSim emulator add on
- Graphical User interface
- Two-Dimensional GUI for visualization (3-D views are not available)
- The “Z axis (depth)” can be configured but cannot be visualized
- Network Stack
- Entire 5-layer network stack is modelled in each device
- L5 - Application Layer
- Sensor Application with small packet sizes and large interarrival times to mimic underwater applications
- Other NetSim applications such as voice, video, FTP etc can be configured. User must keep in mind the very low bit rates available in UWANs
- L4 – Transport layer
- UDP protocol
- L3 – Network layer
- No routing configuration (user inputs) is required for single-hop transmissions
- Static routing to be configured for multi-hop transmissions
- Ad hoc (MANET) routing is currently unavailable and is planned for subsequent releases
- Devices can only communicate within the UWAN. External connectivity (via a gateway) is planned for subsequent releases.
- L2 – MAC layer
- Slotted aloha protocol
- TDMA/DTDMA is planned for subsequent releases
- L1 – PHY Layer
- Underwater Acoustic PHY Model. Propagation delay based on the speed of sound which is dependent on (user configurable) water temperature, depth and salinity
- Modulation schemes: BPSK, QPSK, FSK, 16-QAM, 32-QAM, 64-QAM
- User configurable Data rate and Bandwidth
- SNR based packet reception. BER computed from SNR-BER curves after accounting for propagation losses
- Thorp Propagation Model with user configurable parameters for Temperature, Depth and Salinity, Surface Wind speed, Turbulence and Shipping Noise
| Parameter | Values |
|---|---|
| Source Level | 170-225 dB//1 𝜇𝑃a |
| Antenna Gain | -1000 to 1000 dBi |
| Forward error correction coding | Enabled |
| Modulation Technique | QPSK, BPSK, FSK, 16QAM, 64QAM, 256QAM |
| Coding Rates | 1/2, 2/3,3/4,5/6 |
| Frequency | 0.01 to 1000kHz |
| Data Rate | 0 to 255 kbps |
| Receiver Sensitivity | -120 to 0 dBm |
| Bandwidth | 0-1000 Hz |
- Mobility models can be configured for the underwater sensors: Random way point, Random Walk, File based etc.
- Statistics
- All summary statistics available in NetSim such as throughput, delay, error etc at link level and per application
- Packet and Event trace
- Source Codes
- Protocol source C codes provided along with
- Users can modify the underlying codes using MS Visual studio dev env
- Socket based external interfacing to MATLAB
