R.K. Schmidt

Publications (2)0 Total impact

• Source

  Available from: leinmueller.de

  Conference Proceeding: An approach for selective beacon forwarding to improve cooperative awareness

  R.K. Schmidt, R. Lasowski, T. Leinmüller, C. Linnhoff-Popien, G. Schafer
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  ABSTRACT: Cooperative awareness is established by vehicles exchanging their status frequently. In situations where a high number of vehicles access the communication channel with high frequency, communication and cooperative awareness suffer from increased packet loss. So far, forwarding of beacons focuses on extending the range of V2V communication which is not necessarily needed in most scenarios. In this paper, we motivate selective beacon forwarding to improve the reliability of cooperative awareness in high load situations. We define a metric to measure the quality of cooperative awareness and compare different static beacon rates by a simulation study. Especially in high load situations, we evaluate selective forwarding of beacons to overcome the awareness degradation due to interference, leading to packet loss even at short distances. We show that our approach causes only slight overhead in terms of additional messages and that the age of forwarded information is less than half the beacon interval.
  Vehicular Networking Conference (VNC), 2010 IEEE; 01/2011
• Source

  Available from: psu.edu

  Conference Proceeding: Modeling Roadside Attacker Behavior in VANETs

  T. Leinmuller, R.K. Schmidt, E. Schoch, A. Held, G. Schafer
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  ABSTRACT: Communication using VANETs is commonly seen as the next milestone for improving traffic safety. Vehicles will be enabled to exchange any kind of information that helps to detect and mitigate dangerous situations. Security research in the past years has shown that VANETs are endangered by a plethora of severe security risk. Subject of this work is the modeling of attackers that target active safety applications in VANETs. Through a risk analysis, this work identifies assets, threats and potential attacks in inter-vehicle communication. The risk analysis shows that the most serious threat arises from a quasi-stationary (road-side) attacker that distributed forged warning messages. This attacker is discussed more deeply. We show the degrees of freedom that are available for position forging and find thereby two attacks that demand attention: single position forging having low effort compared to sophisticated movement path forging having a potentially high influence on road traffic safety.
  GLOBECOM Workshops, 2008 IEEE; 01/2009