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Ripple: Communicating through Physical Vibrations
University of Illinois at Urbana-Champaign
Nirupam Roy, Mahanth Gowda, Romit Roy Choudhury
Vibration Motor Accelerometer
Ripple: Communicating through Physical Vibrations Nirupam Roy , - - PowerPoint PPT Presentation
Ripple: Communicating through Physical Vibrations Nirupam Roy , - - PowerPoint PPT Presentation
Ripple: Communicating through Physical Vibrations Nirupam Roy , Mahanth Gowda, Romit Roy Choudhury University of Illinois at Urbana-Champaign Accelerometer Vibration Motor Accelerometer Vibration Motor Morse Code Key On On On On On On O
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Vibration Motor Accelerometer
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Vibration Motor Accelerometer On On Offf On On On On
Morse Code Key
Modulated vibration
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Radio-Frequency Optical Magnetic Acoustic
Vibratory
Communication through Solids
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Radio-Frequency Optical Magnetic Acoustic
Vibratory
Communication through Solids
Why do we care?
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Applications: Mobile Money Transfer
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Applications: Mobile Money Transfer
RECEIVE&
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Applications: Authentication with Ring
Enter&Passcode&
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Applications: Authentication with Ring
Vibratory&& Passcode&Detected&&
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Applications: Authentication with Ring
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Applications: Body-Area Network
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Again, we don’t know the killer-app.
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Application Vibratory Radio
Single-Carrier Multi-Carrier Multi-dimension Phy-Security Morse-code
Hardware
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Single-Carrier Multi-Carrier Multi-dimension Phy-Security Morse-code
6 bps 80 bps 200 bps 400 bps +secured
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Single-Carrier Multi-Carrier Multi-dimension Phy-Security Morse-code
N S
Vibration Motor Accelerometer
C1 C2
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30 60 90 120 ms Single-Carrier Multi-Carrier Multi-dimension Phy-Security Morse-code
Regulated Input Vibration Braking
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Single-Carrier Multi-Carrier Multi-dimension Phy-Security Morse-code 30 60 90 120 ms
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Single-Carrier Multi-Carrier Multi-dimension Phy-Security Morse-code
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Single-Carrier Multi-Carrier
Single-Carrier Multi-Carrier Multi-dimension Phy-Security Morse-code
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Single-Carrier Multi-Carrier Multi-dimension Phy-Security Morse-code 30 60 90 120 ms 100 Hz 200 Hz 300 Hz
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N S
+
Single-Carrier Multi-Carrier Multi-dimension Phy-Security Morse-code
+
…"
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Single-Carrier Multi-Carrier Multi-dimension Phy-Security Morse-code
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Single-Carrier Multi-Carrier Multi-dimension Phy-Security Morse-code
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Single-Carrier Multi-Carrier Multi-dimension Phy-Security Morse-code
Filtering Envelope Detection
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Single-Carrier Multi-Carrier Multi-dimension Phy-Security Morse-code Z Y X
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Single-Carrier Multi-Carrier Multi-dimension Phy-Security Morse-code Z Y X
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Single-Carrier Multi-Carrier Multi-dimension Phy-Security Morse-code Z Y X
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Single-Carrier Multi-Carrier Multi-dimension Phy-Security Morse-code Z Y X Spilled signal
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Phase lag
Single-Carrier Multi-Carrier Multi-dimension Phy-Security Morse-code Z Y X Spilled signal
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2h
Y signal
Y-Axis Z-Axis
Single-Carrier Multi-Carrier Multi-dimension Phy-Security Morse-code
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2h
Y signal Y spill
h Y-Axis Z-Axis
Single-Carrier Multi-Carrier Multi-dimension Phy-Security Morse-code
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2h
Y signal Y spill
h 2h h
Z spill Z signal
Y-Axis Z-Axis
Single-Carrier Multi-Carrier Multi-dimension Phy-Security Morse-code
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2h
Y signal Y spill
h 2h h
Z spill Z signal
2 =&
4h 2h
Scaled Y signal
Y-Axis Z-Axis
*
Single-Carrier Multi-Carrier Multi-dimension Phy-Security Morse-code
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2h
Y signal Y spill
h 2h h
Z spill Z signal
2 =&
4h 2h
Scaled Y signal
Y-Axis Z-Axis
*
Single-Carrier Multi-Carrier Multi-dimension Phy-Security Morse-code
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2h
Y signal Y spill
h 2h h
Z spill Z signal
2 =&
4h 2h
Scaled Y signal
Y-Axis Z-Axis
*
Single-Carrier Multi-Carrier Multi-dimension Phy-Security Morse-code
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2h
Y signal Y spill
h 2h h
Z spill Z signal
2 =&
4h 2h
Scaled Y signal
+
Y-Axis Z-Axis
*
Single-Carrier Multi-Carrier Multi-dimension Phy-Security Morse-code
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2h
Y signal Y spill
h 2h h
Z spill Z signal
2 =&
4h 2h
Scaled Y signal
+ =
3h
Interference free Y signal
Y-Axis Z-Axis
*
Single-Carrier Multi-Carrier Multi-dimension Phy-Security Morse-code
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Single-Carrier Multi-Carrier Multi-dimension Phy-Security Morse-code Z Y X 200 bps 200 bps
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Single-Carrier Multi-Carrier Multi-dimension Phy-Security Morse-code
Physical Layer Security
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Single-Carrier Multi-Carrier Multi-dimension Phy-Security Morse-code
N S
1 0 1
Correlated
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Single-Carrier Multi-Carrier Multi-dimension Phy-Security Morse-code Vibration sound Speaker sound
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Single-Carrier Multi-Carrier Multi-dimension Phy-Security Morse-code Vibration sound Speaker sound
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Single-Carrier Multi-Carrier Multi-dimension Phy-Security Morse-code Vibration sound Speaker sound
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&
Audio Sample Buffer S6 S5 S4 S3 S2 S1 S0 Audio Clock Single-Carrier Multi-Carrier Multi-dimension Phy-Security Morse-code
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&
Audio Sample Buffer S6 S5 S4 S3 S2 S1 S0 Audio Clock Single-Carrier Multi-Carrier Multi-dimension Phy-Security Morse-code
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Single-Carrier Multi-Carrier Multi-dimension Phy-Security Morse-code Vibration sound Speaker sound
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Single-Carrier Multi-Carrier Multi-dimension Phy-Security Morse-code Vibration sound Speaker sound
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Single-Carrier Multi-Carrier Multi-dimension Phy-Security Morse-code
Vibration start Anti-sound start Frequency switch
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Evaluation
Single-carrier
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0.05 0.1 0.15 0.2 0.25 0.5 0.75 1 Bit error rate CDF Vpp=2 Vpp=3 Vpp=4 Vpp=5 Vpp=5.5
Evaluation
325 365 405 445 485 525 565 605 645 685 0.02 0.04 0.06 0.08
Carrier Frequency (Hz) Bit error rate Median 90th Percentile
Multi-carrier
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Summary
Vibratory Radio
Single-Carrier Multi-Carrier Multi-dimension Phy-Security Morse-code
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Thank&You&
(SyNRG Hardware Lab, UIUC)