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technische universität dortmund

A new Dynamic Co-channel Interference Model for Simulation of Heterogeneous Wireless Networks

Andreas Lewandowski, Volker Köster and Christian Wietfeld

Faculty of Electrical Engineering and Information Technology Communication Networks Institute P f D I Ch i ti Wi tf ld

• Prof. Dr.-Ing. Christian Wietfeld

technische universität dortmund

Communication Networks Institute

• Prof. Dr.-Ing. C. Wietfeld

Co-channel Interference

IEEE 802.11 AP IEEE 802.15.4 IEEE 802.11 Node

Baum

C max { Pdesire1 ,Pdesire2 ,…, Pdesiren } I

Σ P

=

dinterference

I Σ Pinterference

ddesired

Slide 2 Volk Volker Köster Köster

A new Dynamic Co-channel Interference Model for Simulation of Heterogeneous Wireless Networks

technische universität dortmund

Communication Networks Institute

• Prof. Dr.-Ing. C. Wietfeld

Interference Model

IEEE 802.11b f = 2.4 GHz IEEE 802.15.4 f = 2.4 GHz Fully overlapping channels

(Wi-Fi) network considered network i interferer network 1

Fully overlapping channels Constant datastreams Wi-Fi: 100 mW ZigBee: 10 mW

(ZigBee) network

ZigBee: 10 mW Dipole antennas

Wi-Fi AP i ZigBee Coordinator 1 (Wi-Fi) network interferer network N

case 1 (downlink) case 2 (uplink) case 3 (internetwork)

Wi-Fi AP N

case 4 (intranetwork) case 5 (internetwork) Potential interferer

Slide 3 Volk Volker Köster Köster

A new Dynamic Co-channel Interference Model for Simulation of Heterogeneous Wireless Networks

Potential interferer

technische universität dortmund

Communication Networks Institute

• Prof. Dr.-Ing. C. Wietfeld

Multiscale Simulation Environment based on OMNeT++

OMNeT++ Raytracing Tool Google SketchUp

Core Element of simulation Core Element of simulation New ChannelControl with Interference Model

3D Map Position

Accurate Propagation Interference Model

• Manages heterogeneity in

t k

3D Map

• Modeling realistic 3D

environments

• Simple User Interface
• Accurate Propagation

Models

• Channel depends on

ZigBee Wi-Fi Wi-Fi network

RSSI

the environment

Online Channel Update

Slide 4 Volk Volker Köster Köster

A new Dynamic Co-channel Interference Model for Simulation of Heterogeneous Wireless Networks

Online Channel Update

technische universität dortmund

Communication Networks Institute

• Prof. Dr.-Ing. C. Wietfeld

Application Scenario Forest Fire

Slide 5 Volk Volker Köster Köster

A new Dynamic Co-channel Interference Model for Simulation of Heterogeneous Wireless Networks

technische universität dortmund

Communication Networks Institute

• Prof. Dr.-Ing. C. Wietfeld

OMNeT++ View on Application Scenario

m 180m

Fire Fighter 0 Fire Fighter 1 Fire Fighter 1

200m

Raytracing Tool OMNeT++

Slide 6 Volk Volker Köster Köster

A new Dynamic Co-channel Interference Model for Simulation of Heterogeneous Wireless Networks

technische universität dortmund

Communication Networks Institute

• Prof. Dr.-Ing. C. Wietfeld

Results of application scenario

*

] ate [m]

• ordina

y co

Slide 7 Volk Volker Köster Köster

A new Dynamic Co-channel Interference Model for Simulation of Heterogeneous Wireless Networks

* Minimum hold evaluation

technische universität dortmund

Communication Networks Institute

• Prof. Dr.-Ing. C. Wietfeld

Conclusions

• Online raytracing channel model

Online raytracing channel model

• Combination of static RSSI values with dynamical C/I changes
• Interference model adaptable to various application fields
• Much disturbance is expected during simultaneous use of Wi-Fi

and ZigBee

Outlook

• Adaptive bitrate adjustment within protocol simulation in OMNeT++
• Adaption to different wireless technologies (e.g. WiMAX or LTE)

Slide 8 Volk Volker Köster Köster

A new Dynamic Co-channel Interference Model for Simulation of Heterogeneous Wireless Networks

technische universität dortmund

Communication Networks Institute

• Prof. Dr.-Ing. C. Wietfeld

Thank you for your Attention

“A new Dynamic Co-channel Interference Model for Simulation of

Heterogeneous Wireless Networks”

Slide 9 Volk Volker Köster Köster

A new Dynamic Co-channel Interference Model for Simulation of Heterogeneous Wireless Networks