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

Transcription

1 A new Dynamic Co-channel Interference Model for Simulation of Andreas Lewandowski, and Christian Wietfeld Faculty of Electrical Engineering and Information Technology Prof. Dr.-Ing. Christian Wietfeld

2 Co-channel Interference IEEE AP IEEE Node IEEE Baum C max { P desire1,p desire2,, P desiren } = I Σ P interference d interference d desired Slide 2

3 Interference Model considered network i (Wi-Fi) network Wi-Fi AP i interferer network 1 (ZigBee) network ZigBee Coordinator 1 IEEE b f = 2.4 GHz IEEE f = 2.4 GHz Fully overlapping channels Constant datastreams Wi-Fi: 100 mw ZigBee: 10 mw Dipole antennas interferer network N (Wi-Fi) network Wi-Fi AP N case 1 (downlink) case 2 (uplink) case 3 (internetwork) case 4 (intranetwork) case 5 (internetwork) Potential interferer Slide 3

4 Multiscale Simulation Environment based on OMNeT++ Google SketchUp Raytracing Tool OMNeT++ Position Core Element of simulation 3D Map New ChannelControl with Interference Model Modeling realistic 3D environments Simple User Interface Manages heterogeneity in Accurate Propagation RSSI network Models Channel depends on ZigBee Wi-Fi Wi-Fi the environment Online Channel Update Slide 4

5 Application Scenario Forest Fire Slide 5

6 OMNeT++ View on Application Scenario 180m Fire Fighter 0 Fire Fighter 1 200m Raytracing Tool OMNeT++ Slide 6

7 Results of application scenario * ] ate [m] oordina y co * Minimum hold evaluation Slide 7

8 Conclusions 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

9 Thank you for your Attention Slide 9