Modeling Battery-free Communications for the Cooja Simulator Carlos - - PowerPoint PPT Presentation

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Modeling Battery-free Communications for the Cooja Simulator Carlos - - PowerPoint PPT Presentation

May 17, 2023 176 likes •632 views

Modeling Battery-free Communications for the Cooja Simulator Carlos Prez-Penichet, Georgios Daglaridis, Dilushi Piumwardane, Thiemo Voigt Battery-free 802.15.4 Receiver Carlos Prez-Penichet, Claro Noda, Ambuj Varshney, and Thiemo Voigt. In

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SLIDE 1

Modeling Battery-free Communications for the Cooja Simulator

Carlos Pérez-Penichet, Georgios Daglaridis, Dilushi Piumwardane, Thiemo Voigt

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SLIDE 2

Battery-free 802.15.4 Receiver

Carlos Pérez-Penichet, Claro Noda, Ambuj Varshney, and Thiemo Voigt. In ACM/IEEE IPSN 2018

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SLIDE 3

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SLIDE 4

A Simulator is Useful

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SLIDE 5

A Simulator is Useful

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SLIDE 6

A Simulator is Useful

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SLIDE 7

A Simulator is Useful

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SLIDE 8

New Models for Carrier-Assisted Communications

  • 1. Simple but realistic models inspired by experiments
  • 2. Implement our models in the Cooja simulator
  • 3. Illustrate how such a tool can be useful

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SLIDE 9
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SLIDE 10

Employ External Carrier to Transmit and Receive

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SLIDE 11

Employ External Carrier to Transmit and Receive

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SLIDE 12

Employ External Carrier to Transmit and Receive

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SLIDE 13

Employ External Carrier to Transmit and Receive

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SLIDE 14

Two Zones of Flawless Reception

50 100 150 200 250 300

Tag's position [cm]

0.0 0.2 0.4 0.6 0.8 1.0

PRR

Transmission

Experiment Flawless reception 50 100 150 200 250 300

Tag's Position [cm]

0.0 0.2 0.4 0.6 0.8 1.0

PRR

Reception

Experiment Flawless reception

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SLIDE 15

Cooja Implementation

MSPSim

Carrier-Assisted Transceiver Model

Cooja

Radio Medium

Contiki

Carrier-Assisted Device Driver

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SLIDE 16

Cooja Implementation

MSPSim

Carrier-Assisted Transceiver Model

Cooja

Radio Medium

Contiki

Carrier-Assisted Device Driver

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SLIDE 17

Carrier Assisted Device Model

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SLIDE 18

Carrier Assisted Device Model

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SLIDE 19

Cooja Implementation

MSPSim

Carrier-Assisted Transceiver Model

Cooja

Radio Medium

Contiki

Carrier-Assisted Device Driver

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SLIDE 20

Cooja Implementation

MSPSim

Carrier-Assisted Transceiver Model

Cooja Contiki

Carrier-Assisted Device Driver Radio Medium

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SLIDE 21

Cooja Implementation

MSPSim

Carrier-Assisted Transceiver Model

Cooja

Radio Medium

Contiki

Carrier-Assisted Device Driver

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SLIDE 22
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SLIDE 23

Radar Range Equation

25 50 75 100 125 150 175 200

Tag's Position [cm]

90 85 80 75 70 65

RSSI [dBm]

Experiment

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SLIDE 24

Radar Range Equation

25 50 75 100 125 150 175 200

Tag's Position [cm]

90 85 80 75 70 65

RSSI [dBm]

Theoretical Experiment

Pr =

  • λ2PtGt

16π2R2

1

G2

bα|∆Γ|2

4 λ2Gr 16π2R2

2

  • 13
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SLIDE 25

Radar Range Equation

25 50 75 100 125 150 175 200

Tag's Position [cm]

90 85 80 75 70 65

RSSI [dBm]

Theoretical Experiment

Pr =

  • λ2PtGt

16π2R2

1

G2

bα|∆Γ|2

4 λ2Gr 16π2R2

2

  • 13
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SLIDE 26

Radar Range Equation

25 50 75 100 125 150 175 200

Tag's Position [cm]

90 85 80 75 70 65

RSSI [dBm]

Theoretical Cooja Experiment

Pr =

  • λ2PtGt

16π2R2

1

G2

bα|∆Γ|2

4 λ2Gr 16π2R2

2

  • 13
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SLIDE 27

Two Zones of Flawless Reception

50 100 150 200 250 300

Tag's position [cm]

0.0 0.2 0.4 0.6 0.8 1.0

PRR

Transmission

Experiment Flawless reception

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SLIDE 28

Two Zones of Flawless Reception

50 100 150 200 250 300

Tag's position [cm]

0.0 0.2 0.4 0.6 0.8 1.0

PRR

Transmission

Experiment Cooja Flawless reception

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SLIDE 29

Receiver Sensitivity Depends on Carrier Strength

30.0 27.5 25.0 22.5 20.0 17.5 15.0

Carrier power [dBm]

50 45 40 35

Sensitivity threshold [dBm]

Experimental

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SLIDE 30

Receiver Sensitivity Depends on Carrier Strength

30.0 27.5 25.0 22.5 20.0 17.5 15.0

Carrier power [dBm]

50 45 40 35

Sensitivity threshold [dBm]

Experimental Linear regression

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SLIDE 31

Two Zones of Flawless Reception (Receiver edition)

50 100 150 200 250 300

Tag's Position [cm]

0.0 0.2 0.4 0.6 0.8 1.0

PRR

Reception

Experiment Flawless reception

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SLIDE 32

Two Zones of Flawless Reception (Receiver edition)

50 100 150 200 250 300

Tag's Position [cm]

0.0 0.2 0.4 0.6 0.8 1.0

PRR

Reception

Experiment Cooja Flawless reception

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SLIDE 33

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SLIDE 34

Multi-carrier Backscatter

Carrier Generators C A Transceiver Receivers 1 2 3 4 5 6 7

1 2 3 4 5 6 7 Carrier Listen Carrier TX RX

Varshney et al. In ACM SenSys 2017

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SLIDE 35

Reflection Interference

1 2 C A Transceiver 3 4 Receiver Transmitters

1 2 3 4 TX RX Interfere

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SLIDE 36

Multi-carrier Interference

Carrier Generators 1 2 C A Transceiver 4 3 Transmitter

1 2 3 4 Carrier TX Interfere

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SLIDE 37

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SLIDE 38

Sensor Tag Scenario

...

1 2 N

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SLIDE 39

Evaluating Protocols’ Energy Consumption

1 2 3 4

Number of nodes (N)

0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4

Energy per useful packet [ J]

Pure ALOHA Slotted ALOHA TDMA

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SLIDE 40

Evaluating Protocols’ Energy Consumption

200 400 600 800 1000 1200 Energy per join [ J] 0.0 0.2 0.4 0.6 0.8 1.0 CDF

Periodic listening

= 50ms = 100ms = 200ms = 800ms

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SLIDE 41

Evaluating Protocols’ Energy Consumption

200 400 600 800 1000 1200 Energy per join [ J] 0.0 0.2 0.4 0.6 0.8 1.0 CDF

Periodic listening

= 50ms = 100ms = 200ms = 800ms 50 100 150 200 250 300 Energy per join [ J] 0.0 0.2 0.4 0.6 0.8 1.0 CDF

Constant listening

= 50ms = 100ms = 200ms = 800ms

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SLIDE 42

Evaluating Protocols’ Energy Consumption

200 400 600 800 1000 1200 Energy per join [ J] 0.0 0.2 0.4 0.6 0.8 1.0 CDF

Periodic listening

= 50ms = 100ms = 200ms = 800ms 50 100 150 200 250 300 Energy per join [ J] 0.0 0.2 0.4 0.6 0.8 1.0 CDF

Constant listening

= 50ms = 100ms = 200ms = 800ms 10 20 30 40 50 60 Energy per join [ J] 0.0 0.2 0.4 0.6 0.8 1.0 CDF

Active join request

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SLIDE 43

New Models for Carrier-Assisted Communications

  • 1. Simple but realistic models inspired by experiments
  • 2. Implement our models in the Cooja simulator
  • 3. Illustrate how such a tool can be useful

25

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SLIDE 44

Available Today

Carrier-Assisted Transceiver

Unmodulated carrier 802.15.4 frames

1 2 3

https://github.com/cperezpenichet/contiki-ng/tree/carrier-assisted carlos.penichet@it.uu.se

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