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An Air-Interface for Ad Hoc Networks Supporting High Mobility

Lott, Matthias   Ebner, Andre   Meincke, Michael   Halfmann, Rudiger   Wischhof, Lars   Schulz, Egon   Rohling,  
  • 초록

    In this paper, a novel air-interface is presented for Fleet-Net1, a self-organizing network for inter-vehicle and vehicle-toroadsidecommunication. The air-interface is based upon the lowchip-rate version of UMTS/TDD. To adapt the cellular UMTS standard to an air-interface for ad hoc networks, changes of the physical layer, medium access control sub-layer and radio resource management are required. An overview of the required modifications is given here. Particularly, a decentralized synchronization mechanism is presented and analyzed by means of simulations. Furthermore, changes for the medium access control are explained in detail, which allow for an efficient operation in partly meshed networks and prioritization. Performance results of the overall system considering throughput and delay are derived by means of analytical evaluations and event-driven simulations. Based on realistic mobility models, it is shown that the presented solution provides a robust communication platform even in vehicular environments. The proposed air-interface is a cost-effective solution not only for inter-vehicle communication, but also for ad hoc networking in general, benefiting from the mass-market of UMTS.


  • 주제어

    Inter-vehicle communication .   MAC .   performance simulation .   RRM .   synchronization.  

  • 참고문헌 (24)

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    5. M. Lott, R. Halfmann, and M. Meincke, 'A frequency agile air interface for intervehicle communication,' in Proc. ICT 2003, . Feb 2003 
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    17. S. S. Lam, 'Packet broadcast networks A performance analysis of the raloha protocol,' IEEE Trans. Comput., vol. C-29, pp. 596-603, July 1980 
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    19. 3GPP, 'Opportunity driven multiple access,' Technical Specification Group Radio Access Network, 3G TR 25.924, Dec. 1999 
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    21. M. Leutzback, Introduction to the Theory ofTraffic Flow, Berlin: Springer, 1988 
    22. 3GPP, 'Spreading and modulation (TDD),' Technical Specification Group Radio Access Network, 3G TS 25.223 V5.0,0, Mar. 2002 
    23. M. Lott and B. Walke, 'A wireless ad hoc multihop broadband network with quality of service support,' in Proc. Inform. Syst. Technol. Panel Symp. Tactical Mobile Commun. (TMC'99), June 1999, pp. 10-18 
    24. M. Lott et al., 'Medium access and radio resource management for ad hoc networks based on UTRA TDD,' in Proc. ACM MobiHoC 2001, (Long Beach, California), Oct. 2001 

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