Presented by Frédéric CHALLITACedric CHAUVENETAndreas BRUNSCHWEILER 10012016 SUMMARY Introduction and project context G3 PLC LOADng routing protocol Theoretical comparison between metrics ID: 1031616
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1. A Comparative Study of Routing Metrics in G3-PLC LOADng routing protocol Presented by : Frédéric CHALLITA-Cedric CHAUVENET-Andreas BRUNSCHWEILER10/01/2016
2. SUMMARY Introduction and project context G3 PLC LOADng routing protocolTheoretical comparison between metrics nSim G3 simulator Simulation results Conclusion and perspectives A Comparative Study of Routing Metrics in G3-PLC LOADng routing protocol – 11/9/2016Pour changer le titre et la date sur toutes les diapos :onglet [Insertion],"En-tête et pied de page",modifiez les donnés dans le champ "Pied de page",cliquez sur le bouton [Appliquer partout].Pour hiérarchiser et donc mettre en forme rapidement les paragraphes, appuyez sur :[Alt] [Maj] [] (flèche droite) pour descendre le texte d'un niveau,[Alt] [Maj] [] (flèche gauche) pour remonter le texte d'un niveau.
3. Introduction 01
4. Context of the project Evolution of the current electrical network into smart grids Integration of information and telecommunications theory The client becomes an actor not only a consumer Linky project : promotes smart metering by using an interesting technology PLC or Power Line Communications A Comparative Study of Routing Metrics in G3-PLC LOADng routing protocol – 11/9/2016
5. Context of the project A Comparative Study of Routing Metrics in G3-PLC LOADng routing protocol – 11/9/2016Narrowband for Smart Metering applications : CENELEC A : 33 till 90 kHzPhysical layer : OFDM (Orthogonal frequency division Multiplexing ) Channel Access managed in MAC layer by CSMA/CA
6. G3 PLC LOADng routing protocol 01
7. G3 PLC LOADng routing A Comparative Study of Routing Metrics in G3-PLC LOADng routing protocol – 11/9/2016Multitude of possible routes, RREQ, RREP, Route Costs, Route choices. Route breakage Route Repair mechanism is triggered, and this operation will generate a flooding in the network
8. Importance of routing Hostile propagation channel : time variable, frequency selective and dependent on the electrical equipment Impedance variationUnpredictability of the created links caused by the variation of the channel’s impulse response. Many possible routes, many criteria to take into account Routing metrics: quantitative assessment that provides a cost for evaluating the path between communicating nodesA Comparative Study of Routing Metrics in G3-PLC LOADng routing protocol – 11/9/2016
9. Routing metrics 01
10. Routing metrics Composite contains many factors to take into account : LQI (adpKq=10)), modulation, number of hops (adpKh=4), number of active tones . Capacity associates route costs to each couple (modulation/nb. of active tones) Alternative configuration of the default Composite by setting adpKr=20 (for ROBO mode). A Comparative Study of Routing Metrics in G3-PLC LOADng routing protocol – 11/9/2016
11. Evolution of Route Cost A Comparative Study of Routing Metrics in G3-PLC LOADng routing protocol – 11/9/2016
12. Aspects of the Composite metric If 0<LQI<255 4<RC<14 . LQI limit of ROBO mode=52 RC=12 LQI max observed = 140 RC=9 : perfect link Small range between ROBO and perfect link This fact can priviliege routes with ROBO links rather than routes with 2 hops D8PSK links because 2*9 > 12 If we had the whole range of LQI 2*4<12 ROBO modulation is sensitive to impulsive noise and random attenuations affecting the propagation channel These facts justify the promising use of Capacity metric A Comparative Study of Routing Metrics in G3-PLC LOADng routing protocol – 11/9/2016
13. Dynamic range of SNR for different modulations A Comparative Study of Routing Metrics in G3-PLC LOADng routing protocol – 11/9/2016
14. nSim G3 Simulator 01
15. Presentation Dedicated to the simulation of the G3 specification User friendly graphical interface with simple configuration of the propagation channel Configuration of noise, attenuation, sub-carriers, etc. Possibility to change MAC, ADP, PHY parameters and test their influence Our goal : test the performances of the different routing metricsA Comparative Study of Routing Metrics in G3-PLC LOADng routing protocol – 11/9/2016
16. Simulation results 01
17. Topology and results A Comparative Study of Routing Metrics in G3-PLC LOADng routing protocol – 11/9/2016
18. Average RTT time A Comparative Study of Routing Metrics in G3-PLC LOADng routing protocol – 11/9/2016
19. Conclusion 01
20. Conclusion and perspectives Enhanced performances measured with the capacity metric or alternative routing configuration of composite metric in different aspects Success rate without droprate Success rate with droprateAverage throughput (≈50% better) Interdependence between the different layers leads to the optimization of the CSMA/CA ( extension of the contention window) Testing the new parameter set of the Composite metric in real field conditions A Comparative Study of Routing Metrics in G3-PLC LOADng routing protocol – 11/9/2016
21. A Comparative Study of Routing Metrics in G3-PLC LOADng routing protocol Presented by : Frédéric CHALLITA-Cedric CHAUVENET-Andreas BRUNSCHWEILER10/01/2016