HPC use in Testing Ad Hoc Wireless Sensor Networks Ken LeSueur Redstone Technical Test Center April...
-
Upload
emerald-garrison -
Category
Documents
-
view
215 -
download
0
Transcript of HPC use in Testing Ad Hoc Wireless Sensor Networks Ken LeSueur Redstone Technical Test Center April...
HPC use in Testing Ad Hoc Wireless Sensor Networks
Ken LeSueurRedstone Technical Test Center
April 22, 2009
US Army Redstone Technical Test Center
• Need: Realistic testing of wireless tactical networks
- Networked sensors and sensor fusion systems
- Networked systems require the network to stimulate the system, unlike stand alone systems that can be tested in isolation
- A real-time network emulation with interfaces to real systems that forces perception and response as they would in the real world
•Current test methods are not adequate for testing tactical wireless network hardware in realistic battlefield environments
Wireless Sensor Network Testbed
2
Wireless Sensor Network Testbed
US Army Redstone Technical Test Center
Proposed Approach
• Combine – Parallel computing resources – Scalable, high fidelity network emulation – Computer Generated Forces (CGF) model
• Testing of sensor hardware is facilitated by Network emulation that will allow interfacing of sensor hardware with virtual components to produce operationally realistic numbers of network nodes
– 5,000 to 10,000 for a future Brigade Combat Team
3
Proposed Approach
US Army Redstone Technical Test Center
Example of Multi-Layered Network
4
Example of Multi-Layered Network
US Army Redstone Technical Test Center
Example of Multi-Layered Network
5
Example of Multi-Layered Network
UGS
UASNetworked Missiles
Sensors
UGV
US Army Redstone Technical Test Center
SIMAF
0
SIMAF
0
6
GatewayNode
EO/IRNode
Track Message (SRW)
Detection Msg
Track Msg (WNW)
NLOS-LS
Tactical ScenarioTactical Scenario
US Army Redstone Technical Test Center
SIMAF
0
SIMAF
0
7
GatewayNode
EO/IRNode
Detection Msg
NLOS-LS
Track Message (SRW)
Tactical ScenarioTactical Scenario
US Army Redstone Technical Test Center
SIMAF
0
SIMAF
0
8
GatewayNode
EO/IRNode
Detection Msg
NLOS-LS
EO/IR Command Msg
Fire Msg (WNW)
Tactical ScenarioTactical Scenario
US Army Redstone Technical Test Center
• Interface to real tactical network hardware
• Real-Time Operation– Parallel Implementation to scale for large number
of nodes
• Support for Military standard Joint Tactical Radio
Systems (JTRS)– Soldier Radio Waveform (SRW)– Wideband Networking Waveform (WNW)
9
General Requirements
US Army Redstone Technical Test Center
NetworkSimulation
(QualNet)
ComputerGenerated
ForcesModel (OneSAF)
SensorHardware
Physical Stimulator
In-band Stimulation
Wireless NetworkInterface HWIL
Interface
Node PositionsOn Terrain
Test Bed Design
10
Test Bed Design
• Infrared• Visible• Seismic • Acoustic
US Army Redstone Technical Test Center
In-band Acoustic/SeismicStimulation
SRW Wireless Interface
Node PositionsOn Terrain
OneSAF
QualNet Network Simulation
TacticalUnattendedGroundSensor
GatewayNode
Ethernet
HPC
11
Unattended Ground Sensor Example
US Army Redstone Technical Test Center
12
System Configuration
Delivery/Integration
August 2009
US Army Redstone Technical Test Center
Subsystem Test & Analysis Branch Facilities
Bullets:
Capabilities:
• Spans from Pure Simulation to Hardware Integration Utilizing HWIL Assets for both Lab and Field Environments
• Classified and Unclassified Networking and Computing
• 92+ Microprocessors and Access to HPC Resources
• Advanced Multi-User KVM Switching to All Computers
• Fiber Links to All RTTC Labs and Ranges
• Defense Research & Engineering Network (DREN) Connection (OC-12 with OC-3 Guaranteed)
• Host of Simulation, Visualization, Network Monitoring and Data Recording Software Suites
• Video Processing, Recording and Distribution
• Simulated Tactical Radio Communications Capability
Distributed Test Control Center (DTCC) / High Performance Computer (HPC) Labs
HPC Lab
DTCC
DTCC
HPC Control Area
US Army Redstone Technical Test Center
• Analysis of scalability of Network emulation and HWIL testing/simulation
• Analysis of performance as a function of fidelity (path loss modeling, terrain model, interference modeling, jamming/attacks, power/battery model, data acquisition, etc.)
Results
14
Initial Testbed Efforts
US Army Redstone Technical Test Center
Purpose: Evaluate number of Nodes, number of processors, and simulation complexity on real-time testing.
• HWIL interfaces linking live video Server/Client•UDP Generator Rude/Crude used for quantitative measurements• 512 kbps UDP/Video Stream• 802.11 wireless protocol• 2 Mbps wireless subnets•Monitor Real-time performance while adjusting number of nodes, subnets, and background traffic
Test Setup
15
Test Setup
US Army Redstone Technical Test Center
HWIL Interface
16
- Virtual Node
- Simulated Node
HWIL Interface
US Army Redstone Technical Test Center
Performance Data
17
0
0.005
0.01
0.015
0.02
0.025
0 25 50 75 100 125 150 175 200 225 250 275 300 325 350 375
Late
ncy
(Sec
)
Packet Number
Unsaturated Simulation Performance
Latency
64 Pk/Sec
100 Bytes/Pk
64 Pk/Sec
1000 Bytes/Pk
128 Pk/Sec
1000 Bytes/Pk
128 Pk/Sec
500 Bytes/Pk
Performance Data
US Army Redstone Technical Test Center
18
0
0.05
0.1
0.15
0.2
0.25
0.3
0.35
0.4
0 500 1000 1500 2000 2500 3000 3500 4000
Late
ncy
(Sec
)
Packet Number
Packet Latency for 750 Node, 2 Processor
Latency
Performance Data
US Army Redstone Technical Test Center
19
0
2
4
6
8
10
12
14
16
18
20
0 250 500 750 1000 1250 1500 1750 2000 2250
Late
ncy
(Sec
)
Packet Number
Packet Latency for 1000 Node, 2 Processor
Latencey
Performance Data Cont.
US Army Redstone Technical Test Center
• Using the scenarios outlined in this testing, approximately 750 simulated wireless network nodes can be simulated on a two processor computer while simultaneously interfacing to two external HWIL networked systems passing live streaming video
• Parallel efficiency is approximately 65% for a 1000 node scenario running on 2 processors (Expand when HPC delivered)
• Performance thresholds can be measured but the results are highly scenario dependent
Conclusion
20
Conclusion